合成氯乙烷新工艺的研究及其产业化

徐万福, 赵莹, 唐智勇, 刘伟, 傅伟松, 余泽华

现代化工 ›› 2020, Vol. 40 ›› Issue (2) : 215 -218,221.

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现代化工 ›› 2020, Vol. 40 ›› Issue (2) : 215-218,221. DOI: 10.16606/j.cnki.issn0253-4320.2020.02.045
工业技术

合成氯乙烷新工艺的研究及其产业化

    徐万福, 赵莹, 唐智勇, 刘伟, 傅伟松, 余泽华
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Study on new process for synthesis of chloroethane and industrialization

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摘要

研究了催化剂种类、AlCl3-ZnCl2用量、馏出液连续套用、中试放大对合成氯乙烷的影响,探索了3种提供氯化氢气体方法用于合成氯乙烷,运用了自动化控制技术和大型反应器生产氯乙烷。结果表明,AlCl3-ZnCl2是催化合成氯乙烷的优良催化剂;当乙醇∶氯化氢∶AlCl3∶ZnCl2(摩尔比)为1∶1.07∶0.4∶0.4时,该催化体系具有最好的催化效率;当馏出液连续套用时,氯乙烷收率更高。硫酸-盐酸法、解析-增浓盐酸循环系统法和副产物氯化氢气体法均可为合成氯乙烷提供氯化氢,副产物氯化氢气体法更具有发展前景。自动化控制技术和大型反应器的应用赋予了氯乙烷生产的安全性和高效性。

Abstract

The effects of catalyst type,dosage of AlCl3-ZnCl2,continuous re-use of distillate and pilot scale-up operation on the synthesis of chloroethane are studied.Three kinds of hydrogen chloride gas supplying methods are explored for synthesis of chloroethane.Both automatic control technology and large-scale reactor are employed in the production of chloroethane.Study results show that AlCl3-ZnCl2 is an excellent catalyst system for the synthesis of chloroethane.The catalyst system exhibits the best catalytic efficiency when the mole ratio of C2H5OH∶HCl∶AlCl3∶ZnCl2 is 1∶1.07∶0.4∶0.4.Higher yield of chloroethane will be gained when the distillate is continuously re-used.H2SO4-HCl method,decompose-enriched hydrochloric acid cycle system method and by-product hydrogen chloride gas method all are suitable hydrogen chloride gas supply methods.Among which,by-product hydrogen chloride gas method has more promising prospect.The application of automation control technology and large-scale reactor endows safety and efficiency for production.

关键词

氯乙烷 / AlCl3 / 染料中间体 / 氯化氢 / 乙醇

Key words

chloroethane / AlCl3 / dye intermediates / hydrogen chloride / ethanol

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合成氯乙烷新工艺的研究及其产业化[J]. 现代化工, 2020, 40(2): 215-218,221 DOI:10.16606/j.cnki.issn0253-4320.2020.02.045

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