国产av福利一区二区三区_国产A级毛片无码不卡_亚州无码不卡在线直播_4399看片免费观看_卡通动漫亚洲100页_日本熟妇浓密毛毛多_亚洲a∨日韩av高清在线观看_天天色欲综合婷婷_偷偷玩弄熟睡人妻中文字幕_亚洲综合色区另类aⅴ

The device uses molecular sieve membranes for deep dehydration of dichloromethane. The annual processing capacity is 4000 tons, the raw material water content is 0.2%, and the product water content is required to be less than 200ppm. The temperature increase operation is not allowed to avoid dechlorination. In September 2019, the device was successfully started, the water content of the methylene chloride product met the contract requirements, and the equipment continued to operate steadily. This project is the first successful case of molecular sieve membrane used for the deep dehydration of organic substances in the international scope.