| 摘要 |
Monovinylacetylene is produced by contacting acetylene with an anhydrous mixture composed of two immiscible phases, one being a solution of cuprous chloride and a primary or secondary aliphatic amine hydrochloride in a carboxylic acid amide as solvent, the other being an inert liquid hydrocarbon or chlorinated hydrocarbon. In one embodiment the acetylene is bubbled through the mixture and the product recovered from the escaping gases, alternatively the acetylene is totally absorbed in the mixture, part of which is withdrawn and product recovered from the hydrocarbon or chlorinated hydrocarbon phase. The volume ratios of the two components may be 10 : 1 to 1 : 10, and temperatures of 30-100 DEG C. are used and pressure of 1-4 atmospheres. Specified amides are formamide, dimethylformamide, dimethylacetamide, diethyl acetamide, propionamide, butyramide, 2-piperidone, 2-pyrrolidone, and N-methyl-2-pyrrolidone. The amine hydrochloride may be derived from dimethylamine, methylamine, ethylamine, dipropylamine, butylamine, or hexylamine and is present in a molar ratio to cuprous chloride of 1-2.3 : 1. The hydrocarbon or chloro-hydrocarbon may be pentane, hexane, cetane, tetrahydro- or decahydronaphthalene, toluene, xylene, cymene, mesitylene, methylene dichloride, cetyl chloride, tetrachloroethylene, chlorobenzene, o-dichlorobenzene, chlorocyclohexane or chloronaphthalene. |
