PROCESS FOR THE MANUFACTURE OF ALPHA, ALPHA-BRANCHED CARBOXYLIC ACID VINYL ESTERS

摘要

The invention relates to a process for the manufacture of α,α-branched carboxylic acids vinyl esters comprising the following steps:
isomerising and converting an olefin feed with CO and water under Koch reaction conditions to make an acid with a ratio of Non Blocking isomers (NB) versus Blocking isomers (B) of NB/B above 1.5, wherein a blocking isomer has always a tertiary carbon atom in alpha position of the carboxylic acid and in the beta position of the carboxylic acid, whereas a non-blocking isomer has primary carbon atoms in the beta position of the carboxylic acidconverting the resulting acid into a vinyl ester.

主权项

1. A composition of α,α-branched carboxylic acid vinyl esters from propylene oligomers comprising:
a vinyl ester mixture of neo-acids derived from propylene oligomer olefin feed having an isomer ratio of (BR1+BR2)/BR3=Ya above 20, with BR1=weight of propylene oligomer olefin with one branching alkyl group, BR2=weight of propylene oligomer olefin with two branching alkyl groups and BR3=weight of propylene oligomer olefin with three or more branching alkyl groups, wherein the neo-acids have a ratio of Non Blocking isomers (NB) versus Blocking isomers (B) of NB/B above 1.5, where a carbon atom is always quaternary, the carbon atom(s) in β position can either be secondary, tertiary, or quaternary, acids with a tertiary or a quaternary carbon atoms in the β position are defined as blocking isomers.