Determination of Acetylenic Hydrogen by Means of Concentrated Silver Solutions

Barnes, Lucien.; Molinini, L. J.

doi:10.1021/ac60102a050

Cited by 15 publications

(2 citation statements)

References 5 publications

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“…Silver perchlorate is appreciably soluble in many organic solvents and reacts with monosubstituted acetylenes in polar media according to R-C=C-+ 2AgC104 R-C=C-Ag. AgC104 + HC104 (1) The liberated perchloric acid may be quantitatively titrated with tris-(hydroxymethyl) aminometb ane to the low pH color change of a screened thymol blue indicator. 2-Propyn-l-ol 2-Methyl-3-butyn-2-ol 3-Phenyl-l-butyn-3-ol 3-Methyl-l-pentyn-3-ol 3-Methyl-l-hexyn-3-ol 3.5-Dimethyll-hexyn-3-ol 2-Ethyl-l-heptyn-3-ol 3-Ethyl-5-methy 1-l-heptyn-3-ol 3.6-Dimethyl-3-hydroxy-l-heptyne 4-Ethyl-l-octyn-2-ol 3-Methyl-l-nonyn-3-ol 1 Aqueous silver nitrate procedure (1).…”

Section: Methodsmentioning

confidence: 99%

Nonaqueous Determination of Acetylenic Hydrogen

Barnes¹

1959

Anal. Chem.

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neck to prevent spray loss of the solution. Adjust the oxygen flow to 5 liters per minute and allow minutes to flush out carbon dioxide in the solution. Weigh a 1-gram sample and transfer to a prefired crucible. (These may be prefired in advance and stored in a desiccator.) Add tin to ensure good combustion. One-half gram is usually sufficient and many samples can be burned with no tin. Add 5 drops of bromocresol purple to the absorbing solution and adjust to colorless end point with carbonate-free alkali or acid. Flush the fritted glass dispersion tube by momentarily opening the gate of the furnace to interrupt oxygen flow and then closing. Readjust the end point. Repeat until end point is constant and note buret reading.Place the covered crucible in position and ignite the sample. Burn for 3 minutes, maintaining plate current as high as possible without overloading

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Section: Methodsmentioning

confidence: 99%

Nonaqueous Determination of Acetylenic Hydrogen

Barnes¹

1959

Anal. Chem.

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“…The use of saturated solutions of silver nitrate or silver perchlorate, to form a soluble complex with acetylene (10), permits analysis of acetylenic alcohols, hydrocarbons, carboxylic acids, and amines with an accuracy7 xvithin 0.5%. The principal advantage is the elimination of the precipitate which interferes with the detection of the end point.…”

Section: Unsaturationmentioning

confidence: 99%

Volumetric and Gravimetric Analytical Methods for Organic Compounds

Smith¹,

Wagner²,

Patterson³

1956

Anal. Chem.

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Acetylene, Properties and Manufacturing from Calcium Carbide

Manyik¹,

Dietz²,

Sargent³

et al. 2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Acetylene, C 2 H 2 , is a highly reactive, commercially important hydrocarbon. Its reactivity is related to its triple bond between carbon atoms and, as a consequence, its high positive free energy of formation. Because of its explosive nature, long distance shipping or pressurized storage is not recommended. Thus acetylene is generally used as it is produced without shipping or storage. Commercially, acetylene is used primarily as a raw material for the synthesis of a variety of organic chemicals. In the United States, this accounts for about 80% of acetylene usage, with the balance being used for metal welding and cutting. Worldwide acetylene production peaked in the mid‐1960s, after which it declined dramatically as processes were developed to substitute lower cost olefins and paraffins for the acetylene feedstock. Production levels reached a minimum in the early 1980s and since have been growing at a rate of about 2–4% per year, mainly in response to the growth of 1,4‐butanediol production. Although acetylene production in Japan, China, and Eastern Europe is still based on the calcium carbide process, the large producers in the United States, Western Europe, and Russia now rely principally on the partial oxidation of natural gas. However, much of the incremental growth in production is based on producing acetylene as a coproduct of ethylene in the steam cracking process. As a coproduct, acetylene is much less costly than as produced from partial oxidation or calcium carbide.

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Determination of Acetylenic Hydrogen by Means of Concentrated Silver Solutions

Cited by 15 publications

References 5 publications

Nonaqueous Determination of Acetylenic Hydrogen

Nonaqueous Determination of Acetylenic Hydrogen

Volumetric and Gravimetric Analytical Methods for Organic Compounds

Acetylene, Properties and Manufacturing from Calcium Carbide

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