Process for the preparation of dicarboxylic acid

Details Process for the preparation of dicarboxylic acid Process for the preparation of dicarboxylic acid

1992-04-14

1993-08-17

Niebling, John

Chemistry: electrical and wave energy

Processes and products

204 86, 204 91, 204 93, 204 96, 204 59R, C25B 302

Patent

active

052365611

ABSTRACT:
A process for the production of dodecanedioic acid by oxidation of cyclododecene using a two liquid phase system comprised of valeric acid and aqueous cerium solutions containing nitrates and bisulfates in dilute nitric acid in which ruthenium tetroxide and lower oxides are dissolved or suspended. In this process cyclododecene is fed directly into the liquid phases which are continuously mixed and contained in an electrolytic cell loop operating at greater than 1.5 v in which the cerium +3 is oxidized to cerium +4 at the anode in a continuous fashion simultaneously with the ruthenium tetroxide oxidation of cyclododecene in the valeric acid. The cerium +4 regenerates the ruthenium tetroxide--simultaneously and in parallel with the other redox reactions. The process is also applicable to oxidation of cyclohexene to adipic acid.

REFERENCES:
patent: 3459644 (1969-08-01), MacLean et al.
patent: 4647349 (1987-03-01), Kreh et al.
patent: 5026461 (1991-06-01), Davis et al.

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