公开(公告)号：US3849475A

公开(公告)日：1974-11-19

申请号：US24759272

申请日：1972-04-26

Applicant: RHONE PROGIL

Inventor： SITAUD G ,  BIARNAIS P ,  FALIZE C

IPC: C07C67/48 ,  C07C69/80

CPC classification number: C07C67/48 ,  C07C67/08 ,  C07C67/52 ,  C07C67/54 ,  C07C67/58 ,  C07C67/60 ,  C07C69/80 ,  C07C69/76 ,  C07C69/48 ,  C07C69/50

Abstract: 1. IN A PROCESS FOR PURIFICATION OF HIGH BOILING ESTERS PRODUCED BY ESTERIFICATION OF AN AROMTIC OR ALIPHATIC ORGANIC MONO OR POLY CARBOXYLIC ACID OR ITS ANHYDRIDE HAVING 6 TO MORE CARBON ATOMS BY AN ALIPHATIC MONOHYDRIC OR POLYHYDRIC ALCOHOL HAVING AT LEAST 8 CARBON ATOMS, IN THE PRESENCE OF AN ESTERIFICATION CATALYST, FOLLOWED BY NEUTRALIZATION OF THE REACTION PRODUCT, HEATING TO 130= 190* C. AND DECANTATION OF THE LATTER TO SEPARATE THEREFROM AN ORGANIC PHASE AND AN AQUEOUS PHASE, THE IMPROVEMENT WHICH COMPRISES PERFORMING THE DECANTATION STEP UNDER POSITIVE PRESSURE AT A TEMPERTURE WITHIN THE RANGE OF 120-200* C.

公开(公告)号：US3836576A

公开(公告)日：1974-09-17

申请号：US35359073

申请日：1973-04-23

Applicant: RHONE PROGIL

Inventor： FALIZE C ,  BOUNIOT A

IPC: C07C67/03 ,  C07C69/54

CPC classification number: C07C69/54 ,  C07C67/03

Abstract: A PROCESS FOR THE TRANSESTERIFICATION WITH AN ALCOHOL OR ALCOHOLS CONTAINING 3-22 CARBON ATOMS OF A METHACRYLIC ACID ESTER FORMED OF AN ALCOHOL HAVING A LOWER BOILING POINT THAN THE ABOVE ALCOHOL, AND WHEREIN THE TRANSESTERIFICATION REACTION IS CARRIED OUT IN THE PRESENCE OF A TITANIUM ALCOHOLATE AS A CATALYST AND DINAPHTHYL PHENYLENE DIAMINE AS A POLYMERIZATION INHIBITOR, IN WHICH THE REACTION IS CARRIED OUT WITH OR WITHOUT BUBBLING AIR THROUGH THE REACTION MIXTURE, AND REMOVING THE DISPLACED ALCOHOL FROM THE REACTION MIXTURE, AS BY DISTILLATION.