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在氯丁橡胶生产中,二乙烯基乙炔是由乙炔合成乙烯基乙炔时的付产物。在精制乙烯基乙炔过程中,有部分二乙烯基乙炔随废水排出。二乙烯基乙炔(H_2C=CH—C≡C—CH=CH_2)系无色油状液体,遇光易呈淡黄色,分子量为78.11,沸点83.5℃,比重(20/4)0.7851,在水中的溶解度甚小。二乙烯基乙炔具有令人厌恶的臭味,且对粘膜的刺激及毒性均较大。本试验中所用二乙烯基乙炔经蒸馏提纯后用气相色谱测定纯度在96%以上,折光率为1.504±0.00(?)。
In the production of neoprene, divinyl acetylene is the by-product of the synthesis of vinyl acetylene from acetylene. In the process of refining vinyl acetylene, some divinyl acetylene discharged with the wastewater. Divinyl-acetylene (H 2 C═CH-C≡C-CH═CH 2) is a colorless, oily liquid that shows a pale yellow color when exposed to light. The molecular weight is 78.11, the boiling point is 83.5 ° C., and the specific gravity (20/4) is 0.7851. The solubility in water Very small. Divinyl acetylene has a disgusting odor and irritation and toxicity to mucous membranes. Divinyl acetylene used in this test after distillation purification by gas chromatography purity of 96% or more, refractive index of 1.504 ± 0.00 (?).