EP 1154977 A1 20011121 - METHODS OF EXTRACTING CATALYST IN SOLUTION IN THE MANUFACTURE OF ADIPIC ACID
Title (en)
METHODS OF EXTRACTING CATALYST IN SOLUTION IN THE MANUFACTURE OF ADIPIC ACID
Title (de)
VERFAHREN ZUR EXTRAKTION VON KATALYSATORLÖSUNGEN IN DER HERSTELLUNG VON ADIPINSÄURE
Title (fr)
PROCEDES D'EXTRACTION EN SOLUTION D'UN CATALYSEUR LORS DE LA FABRICATION D'ACIDE ADIPIQUE
Publication
Application
Priority
- US 0004473 W 20000214
- US 12107099 P 19990222
- US 12270599 P 19990303
Abstract (en)
[origin: WO0048981A1] This invention relates to methods of extracting in solution a metal catalyst from a reaction mixture produced by oxidizing cyclohexane to adipic acid in the presence of acetic acid and the metal catalyst. According to this invention, substantially the totality of the cyclohexane is removed, as well as a major part of the adipic acid. A major part of the acetic acid is also removed without precipitating catalyst, thus forming a concentrate in solution. In a preferred embodiment of the instant invention, the concentrate enters a counter-current stream of counter flowing water and cyclohexanone, resulting in an aqueous solution of metal catalyst, which is the extract, and a phase of concentrate solution dissolved in cyclohexanone, which is the raffinate. The two solutions are further treated and/or recycled.
IPC 1-7
IPC 8 full level
C07B 61/00 (2006.01); C07C 51/215 (2006.01); C07C 51/31 (2006.01); C07C 51/48 (2006.01); C07C 55/14 (2006.01)
CPC (source: EP KR)
C07C 51/313 (2013.01 - EP); C07C 51/48 (2013.01 - EP KR)
Citation (search report)
See references of WO 0048981A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0048981 A1 20000824; AU 3372400 A 20000904; BR 0008380 A 20020219; CA 2363033 A1 20000824; CN 1344240 A 20020410; EP 1154977 A1 20011121; JP 2002537279 A 20021105; KR 20010105353 A 20011128; MX PA01008493 A 20020506
DOCDB simple family (application)
US 0004473 W 20000214; AU 3372400 A 20000214; BR 0008380 A 20000214; CA 2363033 A 20000214; CN 00805435 A 20000214; EP 00911905 A 20000214; JP 2000599722 A 20000214; KR 20017010654 A 20010822; MX PA01008493 A 20000214