Process for inhibiting scale using maleic anhydride polymerized in reactive aromatic hydrocarbons
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United States of America Patent
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Oct 20, 1992
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app pub date -
Sep 26, 1991
filing date -
Feb 14, 1989
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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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