Patent ID: 7041848
Filing Date: 2006-05-09
Classification: C07B,C07C

Abstract:
1. Process comprising oxidizing cycloaliphatic hydrocarbons to dicarboxylic acids in a liquid medium by an oxidizing agent selected from the group consisting of oxygen, air and mixtures of oxygen with nitrogen or an inert gas, wherein one of the constituents of the liquid medium is a lipophilic acidic organic compound selected from the group consisting of 2,5-di-tert-butylbenzoic acid, 4-tert-butylbenzoic acid, 4-octylbenzoic acid, tert-butyl hydrogen orthophthalate and naphthenic and anthracenic acids substituted with tert-butyl groups, wherein the hydrocarbon to be oxidized is at least partially miscible with the lipophilic acidic compound, under the conditions in which the oxidation reaction is carried out, and wherein the weight percentage of lipophilic acidic compound is between 10% and 80% by weight relative to the total weight of the liquid medium, the oxidation being conducted at a temperature within the range of 50° C. to 200° C. and a pressure within the range of 0.1 bar and 200 bar.