Process for preparing 1,1,1,3-tetrachloropropane by using continuous method

• Main Authors: MA YAFENG, FAN JIANPING, ZENG CHANGHUA, WEI PAN, YANG GANG, QI ZHONGLONG, XU LEI, YAN SHAOHUA, YANG HUIE
• Format: Patent
• Language: Chinese; English
• Published: 23.11.2016
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a process for preparing 1,1,1,3-tetrachloropropane by using a continuous method. The process comprises the following steps: mixing carbon tetrachloride with a catalyst; then reacting a mixture obtained in the previous step with ethylene so as to obtain a crude product; and carrying out two-stage pressure-reduced distillation and separation so as to obtain 1,1,1,3-tetrachloropropane. The process provided by the invention overcome the problem of caking and is easily controllable in reaction process, high in raw material conversion rate and high in product purity. 本发明公开了种连续法制备1,1,1,3-四氯丙烷的工艺方法，先将四氯化碳与催化剂进行混合，然后与乙烯反应得到粗品，最后经两级减压精馏分离得到1,1,1,3-四氯丙烷。本发明提供的工艺方法不仅解决了结焦问题，而且反应过程容易控制、原料转化率高、产品纯度高。