公开(公告)号：US20180127340A1

公开(公告)日：2018-05-10

申请号：US15566074

申请日：2016-04-04

Applicant: ARKEMA FRANCE

Inventor： David ANDRE ,  Abdelatif BABA-AHMED

IPC: C07C17/386

CPC classification number: C07C17/386 ,  C07C19/08

Abstract: The invention relates to a process for the purification of pentafluoroethane (R125) containing chloropentafluoroethane (R115). The mixture to be purified is subjected to an extractive distillation, the extractant being selected from dimethylformamide (DMF), dioxane, dimethylsulphoxide (DMSO) and diethylsulphoxide (DESO).

公开(公告)号：US20180029962A1

公开(公告)日：2018-02-01

申请号：US15551789

申请日：2016-02-15

Applicant: ARKEMA FRANCE

Inventor： Dominique GARRAIT ,  David ANDRE ,  Abdelatif BABA-AHMED ,  Charlotte HERDT

IPC: C07C17/383 ,  C07C17/386

CPC classification number: C07C17/383 ,  C07C17/386 ,  C07C19/12 ,  C07C21/073

Abstract: The invention relates to the separation of a mixture comprising 2-chloro-1,1-difluoroethane (R142) and trans-dichloroethylene (TDCE) by extractive distillation and more particularly to a separation process wherein the TDCE is removed selectively by extractive distillation, thus leading to purified 2-chloro-1,1-difluoroethane.