Title of Invention	A PROCESS AND DEVICE FOR SELECTIVE RECOVERY OF COBALT AND MANGANESE CATALYSTS FROM PURGE STREAM IN THE MANUFACTURE OF POLYCARBOXYLIC ACIDS
Abstract	A process for selective recovery of cobalt and manganese catalysts from purge stream in the manufacture of polycarboxylic acids. It comprises precipitating cobalt and manganese from the purge stream with a selective precipitating agent at 40-100`c. The molar ratio of the precipitating agent to the cobalt and manganese in the purge stream is 0.7-0.95 : 1. The purge stream i filtered to eparate the precipitate are recovered by acidification and from the filtrate are recovered by running the filtrate through an ion exchange bed comprising a chelaig ion exchange resin and eluting the ion exchange bed with a mineral acid. A device for carring out the above process comprising a precipitation vessel (2) provided wih heating means (2a) and connected to a filtration vessel (5)which in turn is connected to a dissolution vessel (6)and an ion exchange column (7)comprising an ion exchange bed of chelating ion exchange resin (8).

Title of Invention

A PROCESS AND DEVICE FOR SELECTIVE RECOVERY OF COBALT AND MANGANESE CATALYSTS FROM PURGE STREAM IN THE MANUFACTURE OF POLYCARBOXYLIC ACIDS

Abstract

A process for selective recovery of cobalt and manganese catalysts from purge stream in the manufacture of polycarboxylic acids. It comprises precipitating cobalt and manganese from the purge stream with a selective precipitating agent at 40-100`c. The molar ratio of the precipitating agent to the cobalt and manganese in the purge stream is 0.7-0.95 : 1. The purge stream i filtered to eparate the precipitate are recovered by acidification and from the filtrate are recovered by running the filtrate through an ion exchange bed comprising a chelaig ion exchange resin and eluting the ion exchange bed with a mineral acid. A device for carring out the above process comprising a precipitation vessel (2) provided wih heating means (2a) and connected to a filtration vessel (5)which in turn is connected to a dissolution vessel (6)and an ion exchange column (7)comprising an ion exchange bed of chelating ion exchange resin (8).

Full Text	A PROCESS AND DEVICE FOR SELECTIVE RECOVERY OF COBALT AND MANGANESE CATALYSTS FROM PURGE STREAM IN THE MANUFACTURE OF POLYCARBOXYLIC ACIDS

Documents:

1136-mum-2001-abstract-(22-2-2007).doc

1136-mum-2001-form 2(granted)-(22-2-2007).doc

1136-mum-2001-we claim(granted)-(22-2-2007).doc

990-mum-2001-cancelled pages(8-12-2003).pdf

990-mum-2001-claims(granted)-(8-12-2003).pdf

990-mum-2001-correspondence 1(22-7-2003).pdf

990-mum-2001-correspondence 2(6-6-2006).pdf

990-mum-2001-correspondence(ipo)-(20-9-2006).pdf

990-mum-2001-drawing(8-12-2003).pdf

990-mum-2001-form 1(10-10-2001).pdf

990-mum-2001-form 13(12-11-2003).pdf

990-mum-2001-form 19(22-7-2003).pdf

990-mum-2001-form 2(granted)-(8-12-2003).pdf

990-mum-2001-form 26(10-10-2001).pdf

990-mum-2001-form 26(12-11-2003).pdf

990-mum-2001-form 3(10-10-2001).pdf

990-mum-2001-form 8(31-3-2004).pdf

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Patent Number

202860

Indian Patent Application Number

990/MUM/2001

PG Journal Number

15/2007

Publication Date

13-Apr-2007

Grant Date

20-Sep-2006

Date of Filing

10-Oct-2001

Name of Patentee

RELIANCE INDUSTRIES LIMITED

Applicant Address

MAKER CHAMBER IV, NARIMAN POINT, MUMBAI - 400 021, MAHARASHTRA, INDIA, AN INDIAN COMPANY.

Inventors:

#	Inventor's Name	Inventor's Address
1	1)M. THOMAS 2)S. FOTEDAR 3)DR. S. R. NARAWANE 4)S. A. CHOUGULE 5)R. B. KUMBHAR 6)V. C. MALSHE	BOTH ARE INDIAN NATIONALS.

PCT International Classification Number

N/A

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA