METHOD FOR STABILIZATION OF ETHOXYQUIN, AND AQUEOUS C1-C3 CARBOXYLIC ACID - CONTAINING SOLUTIONS COMPRISING ETHOXYQUIN AS ANTIOXIDANT

Title:

METHOD FOR STABILIZATION OF ETHOXYQUIN, AND AQUEOUS C1-C3 CARBOXYLIC ACID - CONTAINING SOLUTIONS COMPRISING ETHOXYQUIN AS ANTIOXIDANT

Document Type and Number:

WIPO Patent Application WO/2005/108371

Kind Code:

A1

Abstract:

The present invention relates to a method for stabilization of ethoxyquin in aqueous C₁-C₃ carboxylic acid - containing solutions, where 0.1 - 0.5 weight % ascorbic acid, preferably 0.3 - 0.4 weight % and/or 0.1 - 1 weight % sulphite, preferably 0.4 - 0.7 weight % is added to said solution. The invention also relates to aqueous C₁-C₃ carboxylic acid - containing solutions comprising ethoxyquin as antioxidant, where said solution comprises 0.1 - 0.5 weight % ascorbic acid, preferably 0.3 - 0.4 weight %, and/or 0.1 - 1 weight % sulphite, preferably 0.4 - .07 weight %. The invention also relates to the use of ascorbic acid sulphite for stabilization of ethoxyquin in aqueous C₁-C₃ carboxylic acid - containing solutions.

Inventors:

GRANLI TOM (NO)
GALTELAND MONA (NO)

Application Number:

PCT/NO2005/000160

Publication Date:

November 17, 2005

Filing Date:

May 12, 2005

Export Citation:

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Assignee:

YARA INT ASA (NO)
GRANLI TOM (NO)
GALTELAND MONA (NO)

International Classes:

C07B63/04; C07D215/20; C07D215/22; (IPC1-7): C07D215/22

Domestic Patent References:

WO2004045317A1

2004-06-03

Foreign References:

US4772710A	1988-09-20
EP0666300A2	1995-08-09

Attorney, Agent or Firm:

Onsagers AS. (Oslo, NO)

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