Patent ID: 7151192
Filing Date: 2006-12-19
Classification: C07C

Abstract:
1. A manufacturing process for the preparation of α,α-branched alkane carboxylic acids, the process comprising reacting a mono-olefin feed comprising a dimer (C 8 ) or trimer (C 12 ) of n-butene, comprising predominantly 2-butene, with carbon monoxide in the presence of a strong acid catalyst, wherein the n-butene dimer or n-butene trimer olefin feed has not been fractionated, wherein the acid catalyst is composed of BF 3 /H 3 PO 4 in a molar ratio of BF3:H 3 PO 4 in the range of from 0.5:1.0 to 5.0:1.0, or of CF 3 SO 3 H, wherein a weight ratio of the catalyst relative to the mono-oletin is in the range of from 1:1 to 10:1, wherein the reaction is carried out at a temperature in the range of from 60 to 140° C. and wherein the catalyst has an initial water content in the range of from 8 to 25 wt %.