Process of using acylated nitrogen compound petrochemical antifoulants
AssigneeThe Lubrizol Corporation
InventorJames H. Bush
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Abstract
Fouling in a hydrocarbon process stream is reduced by adding to the stream a composition prepared by first reacting an olefinic compound containing at least one group of the formula ##STR1## and a carboxylic reactant having the formula ##STR2## then reacting the product formed thereby with about 0.5 equivalents to about 2 moles, per mole of the carboxylic reactant, of ammonia or a hydrazine or an amine having at least one H--N group.
Claims44
A process for reducing fouling in a hydrocarbon process stream, comprising adding to the stream an antifoulant composition prepared by first reacting, optionally in the presence of an acidic catalyst selected from the group consisting of organic sulfonic acids, heteropolyacids, Lewis acids, and mineral acids,
- (A) at least one olefinic compound containing at least one group of the formula ##STR19## and (B) at least one carboxylic reactant selected from the group consisting of compounds of the formula
- R.sup.3 C(O)(R.sup.4).sub.n C(O)OR.sup.5
- and compounds of the formula ##STR20## wherein each of R.sup.3, R.sup.5 and R.sup.9 is independently H or a hydrocarbyl group, R.sup.4 is a divalent hydrocarbylene group, and n is 0 or 1;
- wherein (A) and (B) are reacted in amounts ranging from 0.6 moles (B) per mole of (A) to 3 moles (B) per equivalent of (A);
- then reacting the product formed thereby with about 0.5 equivalents to about 2 moles, per mole of (B), of (C), wherein
- (C) is at least one of ammonia or a hydrazine or an amine characterized by the presence within its structure of at least one H--N group.
A process for reducing fouling in a hydrocarbon process stream, comprising adding to the stream an antifoulant composition of the formula ##STR26## wherein each of R.sup.1, R.sup.2, and R.sup.3 is H or a hydrocarbyl group;
- R.sup.4 is a divalent hydrocarbylene group;
- n=0 or 1;
- y is an integer from 1 to about 200;
- A is a hydrocarbyl group or a hydroxy-substituted hydrocarbyl group;
- and
- (a) each of R.sup.9 and R.sup.10 is independently H, alkoxyhydrocarbyl, hydroxyhydrocarbyl, hydrocarbyl, aminohydrocarbyl, N-alkoxyalkyl- or hydroxyalkyl-substituted aminohydrocarbyl, or a group of the formula .paren open-st.Y.paren close-st..sub.a R.sup.11 --B, wherein each Y is a group of the formula ##STR27## each R.sup.11 is a divalent hydrocarbyl group, R.sup.12 is as defined above for R.sup.9 and R.sup.10, and B is H, hydrocarbyl, amino, hydroxyhydrocarbyl, an amide group, an amide-containing group, an acylamino group, an imide group, or an imide-containing group, and a is 0 or a number ranging from 1 to about 100;
- or
- (b) R.sup.9 and R.sup.10 are divalent groups, optionally containing one or more heteroatoms selected from the group consisting of N, O and S, said divalent groups being joined to form a heterocyclic ring structure represented by the formula ##STR28## which encompasses the N atom to which they are attached;
- or (c) R.sup.9 is as described in (a) and R.sup.10 is --NR.sup.1 R.sup.2 where R.sup.1 and R.sup.2 are independently hydrogen or a hydrocarbyl group.
Dependencies are inferred from the claim text.