Patent ID: 8394747
Filing Date: 2013-03-12
Classification: C08F,C10L,C10M,C10N

Abstract:
1. A method for preventing metal ion catalyzed oxidation and polymerization reactions in a hydrocarbon medium comprising sequestering the metal ion by the addition of an effective amount of a Mannich condensation product prepared by the Mannich condensation of: (a) a polyisobutyl-substituted hydroxyaromatic compound, wherein the polyisobutyl group is derived from polyisobutene containing at least 70 weight percent methylvinylidene isomer and has a number average molecular Weight in the range of from about 400 to about 2500; (b) an aldehyde: (c) an amino acid or ester derivative thereof, and (d) an alkali metal base wherein the amino acid or ester derivative thereof is represented by the following formula: wherein W is —[CHR″]—