METHODS AND DEVICES FOR SEPARATING CATALYST FROM OXIDATION MIXTURES CONTAINING DIBASIC ACIDS

WIPO Patent Application WO1999037599

A3

This invention relates to methods and reactor devices for controlling the oxidation of hydrocarbons to dibasic acids in the presence of a catalyst and a monobasic acid, by removing the catalyst from the reaction mixture, outside the oxidation zone, after the oxidation has taken place at least partially. Initially, the catalyst is partially precipitated and removed by reducing the water level in the reaction mixture and/or subjecting the reaction mixture to a temperature at which or over which catalyst precipitates. After the initial partial precipitation of the catalyst, the mother liquor remaining is subjected to a thermal treatment during which at least the major part of the monobasic acid is removed leaving behind molten dibasic acids, in which the remaining catalyst precipitates substantially in its totality, and it is removed. The precipitated catalyst in the two precipitation stages may be recycled in miscellaneous ways.

JP4107396	Method for Producing 1,6-Hexanediol and Caprolactone
JP2011515411	Method for producing cyclododecatriene and method for producing laurolactone

DECOSTER DAVID C (US)
VASSILIOU EUSTATHIOS (US)
DASSEL MARK W (US)
ROSTAMI ADER M (US)
DUDGEON DOUGLAS J (US)

PCT/US1998/026054

September 30, 1999

December 08, 1998

Click for automatic bibliography generation  

TWENTY FIRST CENTURY RES CORP (US)
DECOSTER DAVID C (US)
VASSILIOU EUSTATHIOS (US)
DASSEL MARK W (US)
ROSTAMI ADER M (US)
DUDGEON DOUGLAS J (US)

C07C51/31; C07C51/42; C07C55/14; C08G63/90; C08G69/46; C08G73/10; (IPC1-7): C07C51/31; C07C51/42

WO1996003365A1

1996-02-08

EP0494416A2	1992-07-15
DE2309423A1	1974-08-29
DE4427474A1	1996-02-08
US3161603A	1964-12-15

View/Download PDF      PDF Help

Previous Patent: PROCESS FOR PREPARING HYDROFLUOROETHERS

Next Patent: PROCESS FOR PRODUCING 4,6-DIAMINORESORCINOL OR ITS SALTS