Process for inhibiting scale using maleic anhydride polymerized

Details Process for inhibiting scale using maleic anhydride polymerized Process for inhibiting scale using maleic anhydride polymerized

1991-09-26

1992-10-20

Schofer, Joseph L.

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

252180, C02F 508

Patent

active

051567440

ABSTRACT:
Polymaleic anhydride having a weight average molecular weight by gel permeation chromatography of between 450 and 800 and a polydispersivity of between 1.0 and 1.15 is produced by polymerizing maleic anhydride, using a peroxide initiator in an amount not greater than 10% by weight of the anhydride, in a dilute solution in o-xylene or a substituted o-xylene.

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patent: 4374733 (1983-02-01), Snyder et al.
patent: 4789716 (1988-12-01), Scholz
patent: 4818795 (1989-04-01), Denzinger et al.

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