A process for the preparation of adipic acid and other...

Details A process for the preparation of adipic acid and other... A process for the preparation of adipic acid and other...

C - Chemistry, Metallurgy

07

C

C07C 55/14 (2006.01) C07C 51/31 (2006.01)

Patent

CA 2145307

The present invention relates to a process for the preparation of C5-C8 aliphatic dibasic acids through oxidation of corre- sponding saturated cycloaliphatic hydrocarbons by: (I) reacting, at a cycloaliphatic hydrocarbon conversion level of be- tween about 7 % and about 30 %, (a) at least one saturated cycloaliphatic hydrocarbon having from 5 to 8 ring carbon atoms in the liquid phase and (b) an excess of oxygen gas or an oxygen-containing gas mixture, in the presence of (c) less than 1.5 moles of a solvent per mole of cycloaliphatic hydrocarbon (a), wherein said solvent comprises an organic acid containing only primary and/or secondary hydrogen atoms and (d) at least about 0.002 mole per 1000 grams of reaction mixture of a polyvalent heavy metal catalyst; and (2) isolating the C5-C8 aliphatic dibasic acid.

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