Polymaleic anhydride derivatives

Details Polymaleic anhydride derivatives Polymaleic anhydride derivatives

1985-08-30

1988-03-29

Schofer, Joseph L.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210734, 525384, 5253277, B01D 1704

Patent

active

047342048

ABSTRACT:
The invention provides partial esters of a polymer containing maleic anhydride or maleic acid radicals and an alkoxylated alcohol, an alkoxylated alkyl phenol or a polyalkylene glycol.
The products are useful as demulsifiers for water-in-oil emulsions.

REFERENCES:
patent: 3919258 (1975-11-01), Richardson et al.
patent: 4126549 (1978-11-01), Jones et al.
patent: 4154698 (1979-05-01), Doft
patent: 4212788 (1980-07-01), Birrell et al.
patent: 4237005 (1980-12-01), Becker
patent: 4396499 (1983-08-01), McCoy et al.

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