EP 1196367 A1 20020417 - A PROCESS FOR PREPARATION OF ADIPIC ACID
Title (en)
A PROCESS FOR PREPARATION OF ADIPIC ACID
Title (de)
VERFAHREN ZUR HERSTELUNG VON ADIPINSÄURE
Title (fr)
PROCEDE DE PREPARATION D'ACIDE ADIPIQUE
Publication
Application
Priority
IN 9900027 W 19990625
Abstract (en)
[origin: WO0100555A1] The present invention relates to one-step oxidation process for preparation of cyclohexane to adipic acid, using molecular oxygen, in liquid phase, in the presence of catalyst, containing either cobalt or cobalt and iron. The catalyst is activated outside the reactor and molecular oxygen is used as an oxidant. The use of molecular oxygen as oxidant along with preactivated catalyst in the reactor and also by restricting the conversion of cyclohexane between 20-30 % with catalyst in the reactor results in enhanced selectivity to adipic acid. The reaction mixture of cyclohexane and preactivated catalyst is subjected to oxidation by bubbling pure molecular oxygen while stirring the homogenous mixture while bubbling the oxygen at a predetermined temperature, pressure and space velocity conditions. The product selectivity to form adipic acid is found to be at least 5 % better than the maximum attainable using the conventional processes.
IPC 1-7
IPC 8 full level
C07B 61/00 (2006.01); C07C 51/31 (2006.01); C07C 55/14 (2006.01)
CPC (source: EP KR)
C07C 51/31 (2013.01 - KR); C07C 51/313 (2013.01 - EP)
Citation (search report)
See references of WO 0100555A1
Designated contracting state (EPC)
BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
WO 0100555 A1 20010104; EP 1196367 A1 20020417; JP 2003503375 A 20030128; KR 20020037729 A 20020522
DOCDB simple family (application)
IN 9900027 W 19990625; EP 99935040 A 19990625; JP 2001506969 A 19990625; KR 20017016634 A 20011226