Process for purifying the waste water produced in the process of

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters

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210 71, 560 78, 560191, 560204, C07C 6934, C07C 6952

Patent

active

040668355

ABSTRACT:
A process for removing organic components from the waste water effluent obtained in the production of an ester plasticizer through esterification of a polybasic aliphatic or aromatic carboxylic acid with an aliphatic alcohol in the presence of a sulfuric acid catalyst, which waste water contains an alkyl hydrogen sulfate or a dialkyl sulfate, esterification reactants and esterification products, which comprises:
A. heating said waste water to a temperature above 200.degree. C under the particular prevailing pressure; and
B. thereafter thermally or mechanically removing an organic phase from an aqueous phase.

REFERENCES:
patent: 2134531 (1938-10-01), Punnett
patent: 2850440 (1958-09-01), Shader
patent: 3397121 (1968-08-01), Fitzgerald
patent: 3403079 (1968-09-01), Olivier
patent: 3661972 (1974-05-01), Biarnais
patent: 3816485 (1974-06-01), Wechsler
patent: 3849475 (1974-11-01), Biarnais et al.

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