公开(公告)号：DE59101013D1

公开(公告)日：1994-03-24

申请号：DE59101013

申请日：1991-04-05

Applicant: HOECHST AG

Inventor： RITTNER SIEGBERT DR ,  SCHMIDT ADOLF DR ,  STEINER RUDOLF PROF DR ,  UNVERDORBEN LEONHARD

IPC: C07C17/38 ,  C07C17/386 ,  C07C25/08

Abstract: The invention relates to a process for the separation of m- and p-dichlorobenzene by extractive rectification using an extractant and removal of this extractant, in which the extractants used are alkylene carbonates of the general formula … … in which R , R , R and R are identical to or different from one another and represent hydrogen, a methyl or an ethyl radical, with the proviso that the radicals R to R together do not contain more than 6 C atoms. … The process according to the invention makes it possible to separate off the m isomer in high purity.

公开(公告)号：ES2051042T3

公开(公告)日：1994-06-01

申请号：ES91105399

申请日：1991-04-05

Applicant: HOECHST AG

Inventor： RITTNER SIEGBERT DR ,  SCHMIDT ADOLF DR ,  STEINER RUDOLF PROF DR ,  UNVERDORBEN LEONHARD

IPC: C07C17/38 ,  C07C17/386 ,  C07C25/08

Abstract: The invention relates to a process for the separation of m- and p-dichlorobenzene by extractive rectification using an extractant and removal of this extractant, in which the extractants used are alkylene carbonates of the general formula … … in which R , R , R and R are identical to or different from one another and represent hydrogen, a methyl or an ethyl radical, with the proviso that the radicals R to R together do not contain more than 6 C atoms. … The process according to the invention makes it possible to separate off the m isomer in high purity.