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  • Publication Date: January 31, 1973
  • Publication Number: GB-1304855-A


1304855 Aliphatic dicarboxylic acids IMPERIAL CHEMICAL INDUSTRIES Ltd 23 June 1970 [5 Aug 1969] 39079/69 Addition to 1254011 Heading C2C [Also in Division B1] Aliphatic dicarboxylic acids are prepared by contacting a cycloalkanone in liquid phase with molecular oxygen in the presence of the corresponding cycloalkanol and cycloalkane and a catalyst comprising compounds of vanadium with at least one compound of cobalt, iron, manganese and copper. Cyclohexanone, cyclododecanone or cyclooctanone may be used and soluble metal compounds, e.g. acetates and/or acetylacetonates, preferably vanadium/cobalt salts are preferred. Examples describe the use of cobalt acetate tetrahydrate and vanadyl acetylacetonate catalysts and vanadyl acetylacetonate with ferrous acetylacetonate, manganese or cupric acetate.




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    US-5321157-AJune 14, 1994Redox Technologies Inc.Process for the preparation of adipic acid and other aliphatic dibasic acids
    US-5463119-AOctober 31, 1995Redox Technologies Inc.Recycling process for the production of adipic acid and other aliphatic dibasic acids
    US-6235932-B1May 22, 2001Chemintel (India) Private Ltd.Process for preparation of adipic acid
    US-8536374-B2September 17, 2013King Abdulaziz City For Science And TechnologyMethod for preparation of dicarboxylic acids from saturated hydrocarbons or cycloaliphatic hydrocarbons by catalytic oxidation