Middle distillate containing storage stability additive
First Claim
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1. A middle distillate hydrocarbon composition characterized by its stability in the presence of air comprising a major portion of a middle distillate hydrocarbon oil and a minor effective stabilizing portion, as an additive, of the product prepared by reaction of(i) a hydrocarbyl-substituted mono- or bis-succinimide bearing polyamine ##STR36## wherein R is an alkenyl group containing about 8-400 carbon atoms;
- R" is a divalent hydrocarbon group selected from the group consisting of alkylene, alkarylene, aralkylene, cycloalkylene, arylene, alkenylene, and alkynlene;
R'"'"' is --NH2, --NHR'"'"'" or a hydrocarbyl-substituted succinimide group ##STR37## R'"'"'" is a hydrocarbon group selected from the group consisting of alkyl, alkaryl, aralkyl, alkenyl, alkynyl, cycloalkyl, and aryl;
a is an integer 1-8 with(ii) an organic polycarboxylic acid R* (COOH)xwhereinx is an integer 3-6; and
R* is a hydrocarbon group derived by removing a-1 hydrogen atoms from an alkyl, alkaryl, aralkyl, cycloalkyl, aryl, alkenyl, or alkynyl hydrocarbon groupthereby forming product; and
recovering said product.
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Abstract
Additives formed by reaction of polyacids such as 1,3,6-hexane tricarboxylic acid and polyisobutenyl succinimide of a polyamine are effective in improving the storage stability of middle distillate fuels.
31 Citations
18 Claims
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1. A middle distillate hydrocarbon composition characterized by its stability in the presence of air comprising a major portion of a middle distillate hydrocarbon oil and a minor effective stabilizing portion, as an additive, of the product prepared by reaction of
(i) a hydrocarbyl-substituted mono- or bis-succinimide bearing polyamine ##STR36## wherein R is an alkenyl group containing about 8-400 carbon atoms; -
R" is a divalent hydrocarbon group selected from the group consisting of alkylene, alkarylene, aralkylene, cycloalkylene, arylene, alkenylene, and alkynlene; R'"'"' is --NH2, --NHR'"'"'" or a hydrocarbyl-substituted succinimide group ##STR37## R'"'"'" is a hydrocarbon group selected from the group consisting of alkyl, alkaryl, aralkyl, alkenyl, alkynyl, cycloalkyl, and aryl; a is an integer 1-8 with (ii) an organic polycarboxylic acid R* (COOH)x wherein x is an integer 3-6; and R* is a hydrocarbon group derived by removing a-1 hydrogen atoms from an alkyl, alkaryl, aralkyl, cycloalkyl, aryl, alkenyl, or alkynyl hydrocarbon group thereby forming product; and recovering said product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18)
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11. A middle distillate hydrocarbon composition as claimed in claim wherein said organic polycarboxylic acid is citric acid.
Specification
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Current AssigneeTexaco Incorporated (Chevron Corp.)
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Original AssigneeTexaco Incorporated (Chevron Corp.)
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InventorsThomas, Karol J., Kaufman, Benjamin J., Sung, Rodney L.
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Primary Examiner(s)Dixon, Jr., William R.
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Assistant Examiner(s)McAvoy, E.
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Application NumberUS07/267,947Time in Patent Office645 DaysField of Search44/63, 44/57US Class Current44/329CPC Class CodesC10L 1/221 compounds of uncertain form...C10L 1/2383 Polyamines or polyimines, o...
