How To Use Acetylene In A Sentence
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Chapter VI. that the use of metallic copper in the construction of acetylene apparatus is not permissible or judicious, because the gas is liable to form therewith an explosive compound known as copper acetylide; it might seem, therefore, that the employment of a copper salt for purification courts accident.
Acetylene, the Principles of Its Generation and Use
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Where, however, acetylene or other gas is flowing through pipes or apparatus there is a loss of energy, indicated by a falling off in the pressure due to friction, or to the performance of work, such as actuating a gas-meter.
Acetylene, the Principles of Its Generation and Use
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-- Since calcium carbide is only useful as a means of preparing acetylene, it should be bought under a guarantee (1) that it contains less impurities than suffice to render the crude gas dangerous in respect of spontaneous inflammability, or objectionable in a manner to be explained later on, when consumed; and (2) that it is capable of evolving a fixed minimum quantity of acetylene when decomposed by water.
Acetylene, the Principles of Its Generation and Use
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As a 10-year-old kid Pauline used a stolen acetylene torch to decapitate the globe of a gumball machine.
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The signature of a baseline molecule, called acetylene (C2H2), was seen for both types of stars, but hydrogen cyanide was seen only around stars like our sun.
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By the mid 1980's we had developed what I call well-defined catalysts for both the olefin and acetylene metathesis reactions that contained sterically protecting imido and/or alkoxide ligands.
Richard R. Schrock - Autobiography
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This thesis is concerning the acetylene produced through co - cracking coal and natural gas by plasma jet.
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Since we had found previously that by adding bromine to the golden (SN) x material, we could increase its conductivity tenfold, we thought that perhaps the impurity in the polyacetylene was acting as a dopant and was actually increasing the conductivity of the polyacetylene, rather than decreasing it.
Alan G. MacDiarmid - Autobiography
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Excess acetylene should be vented from reaction flasks, tubing, etc., rather than scrubbed with strong base to avoid the formation of acetylides.
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The cartographer at his table beneath a shaded acetylene light drew maps and sketched, the magnetician was busy on calculations close by.
The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914
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As a 10-year-old kid Pauline used a stolen acetylene torch to decapitate the globe of a gumball machine.
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The other contribution is the synthesis of liquid crystalline conjugated polymers by replacing the hydrogen atom bonded to polyacetylene with a substituent having liquid crystalline nature as the side chain.
Hideki Shirakawa - Autobiography
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It is certainly true that the purer is the acetylene burnt, both as regards freedom from phosphorus and absence of products of polymerisation, the longer do the burners last; and it has been claimed that a burner constructed at its jets of some non-porous substance, e.g., "ruby," does not choke as quickly as do steatite ones.
Acetylene, the Principles of Its Generation and Use
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For instance, Mai has found that freshly made copper acetylide can be heated to 60° C. or higher without explosion; but that if the compound is exposed to air for a few hours it explodes on warming, while if warmed with oxygen it explodes on contact with acetylene.
Acetylene, the Principles of Its Generation and Use
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Most 3rd world skilled builders/labourers have the most primitive and basic hand tools only. and arc/tig/mig or oxyacetylene would be beyond their purchasing power.
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radical" ethynyl molecule and a diacetylene molecule.
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Freund and Mai have also observed that when copper acetylide which has been dried in contact with air for four or five hours at a temperature of 50° or 60° C. is allowed to explode in the presence of a current of acetylene, an explosion accompanied by light takes place; but it is always local and is not communicated to the gas, whether the latter is crude or pure.
Acetylene, the Principles of Its Generation and Use
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Cuprous carbide or acetylide is the reddish brown amorphous precipitate which is the ultimate product obtained when acetylene is led into an ammoniacal solution of cuprous chloride.
Acetylene, the Principles of Its Generation and Use
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We use the heat produced by the burning of acetylene in the flame of the oxyacetylene torch to make welds.
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The nanoparticles are mixed with acetylene black, which makes the mixture electrically conductive, and molybdenum trioxide, which supplies the oxygen.
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Cylinders of acetylene were believed to have gone up in what was originally reported as a simple barn fire.
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Ethyne, or acetylene, has the chemical formula CH 2 CH 2, with a triple bond between the two carbons.
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It cannot altogether be granted that the value of a process for diluting acetylene with carbon dioxide has been established, except in so far as the mere presence of the diluent may somewhat diminish the tendency of the acetylene to polymerise as it passes through a hot burner (_cf.
Acetylene, the Principles of Its Generation and Use
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Firefighters were forced to retreat when they realised that the building contained acetylene canisters, gas bottles and diesel barrels.
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The reactions of allylene closely resemble those of acetylene.
Transactions of the American Philosophical Society
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Before the advent of propane torches, acetylene, or gasoline blowtorches, jewelers used an alcohol flame and a small blowpipe to direct and intensify the heat where they needed it.
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The world learned one morning of a new gas called acetylene, clear, brilliant, cheap, and simply made from calcium carbide.
Frenzied Finance Vol. 1: The Crime of Amalgamated
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As a result, we found that the emergence of electrical conductivity on the doped polyacetylene was due to the creation of carbocations or positively charged solitons associated with withdrawing of p electrons from polyacetylene by the dopant when iodine was used as an acceptor dopant.
Hideki Shirakawa - Autobiography
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The reaction is so facile that it would be surprising if it didn't occur given the presence of these molecules (cyanimide, cyanoacetylene, glycolaldehyde, glyceraldehyde, and inorganic phosphate).
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The other method consists in pumping acetylene under pressure into a cylinder apparently quite full of some highly porous solid matter, like charcoal, kieselguhr, unglazed brick, &c.
Acetylene, the Principles of Its Generation and Use
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For a uniform ‘flame finish,’ granite is first polished normally, then spalled with a large oxyacetylene burner.
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Cytosine can be formed by reacting cyanoacetylene with cyanate, cyanogen or urea, and uracil can be produced by the hydrolysis of cytosine.
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The success and widespread use of this method in 20th-century sculpture has depended on the invention around 1900 of fusion welding using oxyacetylene welding equipment.
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Whatever the feedstock, the product slate is a complex mixture of hydrogen, ethylene, other olefins, diolefins and gasoline as well as smaller amounts of acetylenes and carbon monoxide.
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Many of these vinyl compounds are made by the reaction of acetylene with electrophiles.
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First, researchers found that when the polymer polyacetylene acquires an extra electron, the particle seems to split into two quasi-particles, or excitations of the molecule as a whole.
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So taking the bravest-feathered acetylene lamp into the phonologic laboratory, we consummated our radionic guest on the slab in the dark, and incorporated every energy to the mixing of a pretty solution, the weighing and measuring supervised by West with an almost light-headedness care.
Think Progress » Prison Camp Turns Three, WIll Build Psychiatric Wing for Inmates it Drives Crazy
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ATP binding sites are regulatory sites in the nitrogenase and the acetylene reduction active sites are catalytic sites in the nitrogenase.
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They also rejected bridgehead double bonds and allenes, and (to my surprise) only allowed triple bonds for nitriles (so no acetylenes.)
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Other authorities hold that mantles for acetylene, should contain other rare earths besides the thoria and ceria of which the coal-gas mantles almost wholly consist.
Acetylene, the Principles of Its Generation and Use
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To transport gaseous substances such as propane or acetylene economically, they must be compressed greatly to fit into containers of a reasonable size.
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Acrylonitrile is another product of acetylene, formed in a reaction with hydrogen cyanide.
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In addition, certain polyacetylene constituents of Echinacea have been found to be bacteriostatic against E. coli and Pseudomonas aeruginosa.
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In the United States alone, several hundred thousand tons of acetylene are produced every year, but its volatility renders it difficult to transport: It becomes dangerously explosive at about 30 psi (207 kilopascal), only about twice normal atmospheric pressure.
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I noticed now that there were other acetylene mantles set at intervals around the walls of the Cabin.
ANTI-ICE
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His conclusions are that a copper acetylide is always produced if impure acetylene is allowed to pass through neutral or ammoniacal solutions of copper; that dry acetylene containing all its natural impurities except ammonia acts to an equal extent on copper and its alloys, yielding the explosive compound; that pure and dry gas does not act upon copper or its alloys, although it is possible that an explosive compound may be produced after a great length of time.
Acetylene, the Principles of Its Generation and Use
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It was ethinol, a pretty rarely isolated organic chemical (hydroxy acetylene).
Times, Sunday Times
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His sun-valve was fitted in a number of lighthouses powered by acetylene gas.
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According to Lewes, acetylene commences to "polymerise" at a temperature of about 600° C., when it is converted into other hydrocarbons having the same percentage composition, but containing more atoms of carbon and hydrogen in their molecules.
Acetylene, the Principles of Its Generation and Use
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Cylinders of acetylene were believed to have gone up in what was originally reported as a simple barn fire.
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There are also several vehicles cut up by acetylene equipment and dumped in a pond.
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It wasn't so long ago that the lanterns on buoys were powered by acetylene gas, requiring more frequent visits to replace the gas, and to relight pilot lights which could be blown out.
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Another use for acetylene, which is only dependent upon a suitably lowered price for carbide to become of some importance, consists in the preparation of a black pigment to replace ordinary lampblack.
Acetylene, the Principles of Its Generation and Use
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Beside him, strings of fishing boats put out to sea, their large lights, dazzling like acetylene, mounted in hats at the stern.
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While dealing with the blaze, the fire fighters also came across a number of cylinders including two that contained highly volatile acetylene gas.
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-- Among minor reagents suggested as purifying substances for acetylene may be mentioned potassium permanganate, barium peroxide, potassium bichromate, sodium plumbate and arsenious oxide.
Acetylene, the Principles of Its Generation and Use
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The gang worked for up to ten hours with acetylene torches to open the vault.
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The oxyfuel gas welding process uses a flux and either an oxyacetylene or oxyhydrogen gas flame.
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We use the heat produced by the burning of acetylene in the flame of the oxyacetylene torch to make welds.
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Of the many methods for gas brazing other metals, only the oxyacetylene gas has been found effective to date with titanium in that the gas employed does not embrittle the material.
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Cuprous carbide, however, is very unstable and prone to oxidation; so that, given the opportunity, it combines with oxygen or hydrogen, or both, until it produces the copper acetylide, or acetylene-copper, which is explosive -- a body to which Blochmann's formula
Acetylene, the Principles of Its Generation and Use
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The location is what we call a packaged gases or cylinder gases location that puts various types of gases, primarily acetylene, which is used for welding, but other types of gases as well into cylinders for distribution to customers.
CNN Transcript Jun 24, 2005
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Oxidation of allylene to carbon dioxide, as in the case of acetylene, is not easily effected except by the most powerful oxidiz - ing agents, such as calcium hypobromite or potassium permanganate in concentrated sulphuric acid.
Transactions of the American Philosophical Society
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These are known as acetylene dichloride and tetrachloride respectively, or more systematically as dichlorethylene and tetrachlorethane.
Acetylene, the Principles of Its Generation and Use
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The emergency situation was sparked after a fire broke out in a shed in the back garden of a Portchester house where there was a 4ft cylinder containing oxyacetylene gas.
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Acetylene or ethyne is also used to make vinyl chloride and vinyl acetate, both of which are converted to polymers.
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If acetylene be compressed above fifteen pounds per square inch at ordinary temperature without first being dissolved in acetone a danger is present of self-ignition.
Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon
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The toxic action of the impurities of crude acetylene is discussed in Chapter V. Acetylene is an "endothermic" compound, as has been mentioned in Chapter
Acetylene, the Principles of Its Generation and Use
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By the mid 1980's we had developed what I call well-defined catalysts for both the olefin and acetylene metathesis reactions that contained sterically protecting imido and/or alkoxide ligands.
Richard R. Schrock - Autobiography
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In order to overcome this defect, inherent to metal nipples, burners are now constructed for acetylene in which the nipple is of hard incorrodible material.
Acetylene, the Principles of Its Generation and Use
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An ethynyl radical is produced in Titan's atmosphere by the photodissociation of acetylene by ultraviolet light.
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The "sulphur compounds" of coal-gas, however, consist mainly of carbon bisulphide, which is certainly not the chief "sulphur compound" in acetylene, even if present to any appreciable extent.]
Acetylene, the Principles of Its Generation and Use
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The colors of the palladium compounds of acetylene and allylene do not differ materially.
Transactions of the American Philosophical Society
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Acetylene is the most calorific of the three, and so is the most likely candidate.
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But this refers only to crude acetylene undiluted with air; and being a hydrocarbon -- being in fact neither oxygen nor common air -- acetylene is irrespirable of itself though largely devoid of specific toxic action.
Acetylene, the Principles of Its Generation and Use
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The oxyacetylene torch, for example, produces heat by burning acetylene gas in pure oxygen.
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Caro has found that when pure dry acetylene is led for nine months over sheets or filings of copper, brass containing 63.2 per cent. of copper, red brass containing 73.8 per cent., so-called "alpaca-metal" containing 65.3 per cent., and britannia metal containing 90.2 per cent. of copper, no action whatever takes place at ordinary temperatures; if the gas is moist very small quantities of copper acetylide are produced in six months, whatever metal is tested, but the yield does not increase appreciably afterwards.
Acetylene, the Principles of Its Generation and Use
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By the mid 1980's we had developed what I call well-defined catalysts for both the olefin and acetylene metathesis reactions that contained sterically protecting imido and/or alkoxide ligands.
Richard R. Schrock - Autobiography
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I became interested in dinitrogen chemistry around 1980, and polymer chemistry (first ring-opening metathesis polymerization and later olefin and acetylene polymerization) a few years after that.
Richard R. Schrock - Autobiography
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The cylinders contained acetylene, which is a highly energetic chemical.
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The paint spray workshop also contained two acetylene cylinders, two oxygen cylinders and two propane bottles as well as chromic acid and acetone.
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They made derivatives of acetylene and engineered a compound, which they call PPP, to test against IspH.
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For a uniform ‘flame finish,’ granite is first polished normally, then spalled with a large oxyacetylene burner.
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Cytosine can be formed by reacting cyanoacetylene with cyanate, cyanogen or urea, and uracil can be produced by the hydrolysis of cytosine.
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Earth-based and space-based observers have long known that Titan's atmosphere contains methane, ethane, acetylene and many other hydrocarbon compounds.
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One such early material was AsF 5 doped cis polyacetylene - this was not a pleasant dopant to use, but it increased the polymer's conductivity by a factor of as much as 10 11.
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These people cut through the side of the metal store with an oxyacetylene torch.
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The reaction is so facile that it would be surprising if it didn't occur given the presence of these molecules (cyanimide, cyanoacetylene, glycolaldehyde, glyceraldehyde, and inorganic phosphate).
Slashdot
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About 70 years ago, towards the end of 1938 and at the start of 1939 to be exact, the chemist Walter Reppe, working in a BASF laboratory in Ludwigshafen, used acetylene and pyrrolidone to produce a new monomer called vinylpyrrolidone, which in turn can be transformed into the polymer polyvinylpyrrolidone.
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Both luck and insight played roles in the discovery of the first conducting polymer, a form of the material called polyacetylene.
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Even dry-cleaning fluid, which is generally trichloroethylene, can be made from acetylene.
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It carried with it another innovation of Canadian origin – namely, a mobile acetylene gas plant.
War Story of the Canadian Army Medical Corps
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The fire started in the 20-metre by 10-metre workshop which contained a cylinder of hazardous acetylene.
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Originally the alkynes were called the acetylenes.
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When those two substances are mixed together the hydrogen of the water leaves its original partner, oxygen, and the carbon of the calcium carbide leaves the calcium, uniting together to form that particular compound of hydrogen and carbon, or hydrocarbon, which is known as acetylene, whose formula is C_2H_2; while the residual calcium and oxygen join together to produce calcium oxide or lime, CaO.
Acetylene, the Principles of Its Generation and Use
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It was originally an acetylene light but was converted to propane gas operation in 1963.
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Nigel watched the list of molecules and free radicals stack up: ethanol, cyanoacetylene, carbon monoxide, ammonia, methane, water-and realized that as far as the universe was concerned, this was where chemistry occurred.
Across The Sea Of Suns
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The location is what we call a packaged gases or cylinder gases location that puts various types of gases, primarily acetylene, which is used for welding, but other types of gases as well into cylinders for distribution to customers.
CNN Transcript Jun 24, 2005
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Eitner also found that when 13 of the 21 volumes of oxygen in air are displaced by carbon dioxide, a mixture of such "carbon dioxide air" with acetylene is inexplosive in all proportions.
Acetylene, the Principles of Its Generation and Use
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Vinyl ethers are made by addition of alcohols to acetylene.
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On the assumption that acetylene begins to polymerise at a temperature of 100° C.,
Acetylene, the Principles of Its Generation and Use
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Acetone is the solvent which will dissolve the acetylene gas charged into the cylinder.
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The bar had its own interior light, a small acetylene lamp.
ANTI-ICE
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Old oxygen and acetylene tanks and welding equipment along with an old Plymouth van.
BREACH OF DUTY
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A delicate 24-hour cooling operation saw roads and houses cordoned off as the emergency services tried to prevent the acetylene, propane and oxygen cylinders from exploding in Thornton Heath.
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Also, much modern torch use acetylene is still made this way.
Flammable Ice
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Fittings are now being specially made for acetylene, which is a step in the right direction, because, in addition to superior taps and joints being essential, smaller bore piping and smaller through-ways to the taps than are required for coal-gas serve for acetylene.
Acetylene, the Principles of Its Generation and Use
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The effect of a new growth biostimulant on acetylene reduction in nodulated seedlings of Alnus acuminata.
Chapter 4
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And 40 homes in Oldham had to be evacuated after a fire at a garage in Barry Street, where oxy-acetylene canisters were stored.
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Other authorities hold that mantles for acetylene, should contain other rare earths besides the thoria and ceria of which the coal-gas mantles almost wholly consist.
Acetylene, the Principles of Its Generation and Use
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Observers have long known that Titan's atmosphere contains methane, ethane, acetylene and many other hydrocarbon compounds.
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If it may be assumed that the other silicides in commercial calcium carbide also behave in this manner it is plain that hydrogen silicide cannot occur in crude acetylene unless the gas is supposed to be hurried out of the generator before the alkaline water therein has had time to decompose any traces of the hydrogen silicide which is produced in the favouring conditions of high temperature sometimes prevailing.
Acetylene, the Principles of Its Generation and Use
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It was ethinol, a pretty rarely isolated organic chemical (hydroxy acetylene).
Times, Sunday Times
