Process for the manufacture of a cyclopentenedione

摘要

A process for the manufacture of 2,2,4-trimethyl-cyclopent-4-ene-1,3-dione by oxidizing 3,5,5-trimethyl-cyclohex-2-ene-1,4-dione with oxygen or an oxygen-containing gas in the present of a manganese, cobalt or copper containing catalyst.