二氯甲烷和甲醇共沸体系的分离模拟研究  

SIMULATION STUDY ON SEPARATION OF DICHLOROMETHANE AND METHANOL AZEOTROPE SYSTEM

作　　者：吕才山[1] 李政[1] 马鹏程[1] Lv Caishan;LI Zheng;MA Pengcheng(Research Institute of Qilu Branch Co.,SINOPEC,Zibo Shandong 255400)

机构地区：[1]中国石化齐鲁分公司研究院,山东淄博255400

出　　处：《齐鲁石油化工》2024年第2期106-110,共5页Qilu Petrochemical Technology

摘　　要：基于Aspen Plus模拟软件,采用萃取精馏的工艺流程对二氯甲烷和甲醇共沸体系进行模拟分离,推荐以乙二醇为萃取剂,对各塔关键参数进行了优化,确定了最佳操作参数:萃取塔理论板数为49,原料进料位置为第40块理论板,进料量为1 000 kg/h,乙二醇进料位置为第3块理论板,进料量为260 kg/h,可实现萃取塔塔顶采出质量分数为99.9%的二氯甲烷700 kg/h;萃取剂回收塔理论板数为10,进料位置为第3块理论板,回收塔塔顶采出质量分数为99.8%的甲醇300.3 kg/h,塔釜回收的萃取剂可返回利用。Based on Aspen Plus simulation software, the azeotrope system of dichloromethane and methanol was simulated and separated by extractive distillation process. Glycol was re-commended as the extraction agent. The key parameters of each column were optimized, and the optimal operating parameters were determined: the number of theoretical plates of the extraction column is 49, the material feeding position is the 40th theoretical plate, and the feeding amount is 1 000 kg/h. Under condition of the number of theoretical plates of the extraction agent recovery tower is 10, the glycol feeding position is the third theoretical plate, the feeding amount is 260 kg/h, 700 kg/h extraction of dichloromethane with a mass fraction of 99.9% at top of the extraction tower, and 300.3 kg/h extraction of methanol with a mass fraction of 99.8% at top of the recovery tower is realized. The extractant recovered from the tower reactor can be reused.

关 键 词：二氯甲烷 甲醇 萃取精馏 乙二醇 

分 类 号：TQ028.4[化学工程]