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一种高纯度一氯甲烷的生产工艺甲醇和氯化氢经汽化过热后进入装有氧化铝催化剂的反应器,在反应器内反应生成一氯甲烷、甲烷、氯乙烷、二氯甲烷的混合物:生成的混合物进入激冷器。经激冷分离后进入酸洗塔,碱洗塔,硫酸干燥系统,压缩后制得粗一氯甲烷;粗一氯甲烷进入一氯甲烷精制塔,由塔底分离出重组分;轻组分甲烷和一氯甲烷一起蒸发至塔顶,而后经水冷和深冷,一氯甲烷液化,而未液化的甲烷则通过深冷器排空到排气洗涤塔,从而实现一氯甲烷与甲烷的分离,得到高纯度的一氯甲烷。本发明采用了单塔精馏的方式,既不大量增加设备投资,又提高了一氯甲烷的含量,使其大于99.98%。公开号:CN101 134708A申请人:山东东岳氟硅材料有限公司
A high-purity methyl chloride production process Methanol and hydrogen chloride overheated after vaporization into the reactor with alumina catalyst, react in the reactor to generate a mixture of methyl chloride, methane, ethyl chloride, methylene chloride: generated Of the mixture into the chiller. After chilling separation into the acid washing tower, caustic washing tower, sulfuric acid drying system, after compression crude crude methyl chloride; crude methyl chloride into the distillation column of methyl chloride, separated from the bottom of the heavy fraction; light components of methane And monochloromethane together with the evaporation to the top of the tower, and then by the water and cryogenic, liquefied with methyl chloride, liquefied methane is vented to the exhaust scrubber through the cryogenic cooler, in order to achieve separation of methyl chloride and methane, Get high purity methyl chloride. The present invention adopts the method of single-column distillation without increasing the equipment investment and increasing the content of monochloromethane to more than 99.98%. Publication Number: CN101 134708A Applicant: Shandong Dongyue Fluorosilicone Material Co., Ltd.