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Method for the production of alicyclic polycarboxylic acid esters from partial esters of aromatic polycarboxylic acids

  • US 7,632,961 B2
  • Filed: 09/14/2002
  • Issued: 12/15/2009
  • Est. Priority Date: 09/27/2001
  • Status: Expired due to Fees
First Claim
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1. A process for preparing cycloaliphatic polycarboxylic esters, which comprises:

  • a) hydrogenating a partial ester of the corresponding aromatic polycarboxylic acid or of the corresponding aromatic polycarboxylic anhydride whose carboxylic acid or anhydride groups have been partially esterified with at least one branched or unbranched alkyl, cycloalkyl, and/or alkoxyalkyl alcohol having from 3 to 15 carbon atoms, andb) reacting the resultant cycloaliphatic partial ester with at least one branched or unbranched alkyl, cycloalkyl, and/or alkoxyalkyl alcohol having from 3 to 15 carbon atoms in the presence of a titanium or zirconium catalyst to give a full ester product.

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