Composition and method for reducing hydrate agglomeration

Patent metadata

Field	Value
Publication number	US-9505707-B2
Application number	US-201113326910-A
Country	US
Kind code	B2
Filing date	Dec 15, 2011
Priority date	Dec 22, 2010
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

Disclosed and claimed is a composition and method of inhibiting the formation of hydrate agglomerates in a fluid comprising water, gas, and optionally liquid hydrocarbon. The composition comprises the following formula and the method comprises adding to the fluid an effective anti-agglomerant amount of any of the following formula and optionally salts thereof.

R 1 , R 2 , and R 3 are each independently C n H 2n+1 or benzyl. R 4 is C 4 -C 20 alkyl or alkenyl. n is an integer from 0 to 10. X − is a counterion.

First claim

The claimed invention is:

1. A composition comprising the following formula and optionally salts thereof:

wherein R 1 is C n H 2n+1 or benzyl;
R 2 and R 3 are butyl;
wherein R4 is C 4 -C 20 alkyl or alkenyl;
n is an integer from 0 to 10; and
X − is a counterion.

2. The composition of claim 1 , wherein each alkyl is independently selected from the group consisting of: a straight chain alkyl, a branched chain alkyl, a cyclic alkyl, a saturated version of the foregoing, an unsaturated version of the foregoing, and combinations thereof.

3. The composition of claim 1 , wherein R 1 is selected from the group consisting of: methyl; ethyl; propyl; butyl; pentyl; hexyl; heptyl; octyl; nonyl; and decyl.

4. The composition of claim 1 , wherein the alkyl for R 4 is selected from the group consisting of: butyl; pentyl; hexyl; heptyl; octyl; nonyl; decyl; and combinations thereof.

5. The composition of claim 1 , wherein the counterion comprises at least one halide.

6. The composition of claim 1 , wherein the counterion is at least one carboxylate.

7. The composition of claim 1 , further comprising at least one component selected from: thermodynamic hydrate inhibitors, one or more kinetic hydrate inhibitors, one or more additional anti-agglomerants, and combinations thereof.

8. The composition of claim 1 , further comprising at least one component selected from: asphaltene inhibitors, paraffin inhibitors, corrosion inhibitors, scale inhibitors, emulsifiers, water clarifiers, dispersants, emulsion breakers, and combinations thereof.

9. The composition of claim 1 , further comprising at least one polar or nonpolar solvent or a mixture thereof.

10. The composition of claim 1 , further comprising at least one solvent selected from the group consisting of: isopropanol, methanol, ethanol, 2-ethylhexanol, heavy aromatic naphtha, toluene, ethylene glycol, ethylene glycol monobutyl ether (EGMBE), diethylene glycol monoethyl ether, xylene, and combinations thereof.

11. A method of inhibiting the formation of hydrate agglomerates in a fluid comprising water, gas, and optionally liquid hydrocarbon comprising adding to the fluid an effective anti-agglomerant amount of the composition of claim 1 .

12. The method of claim 11 , wherein said fluid has a salinity of 0% to 25% w/w percent total dissolved solids (TDS).

13. The method of claim 11 , wherein the fluid is contained in an oil or gas pipeline or refinery.

Assignees

• Webber Peter A
• Conrad Peter G
• Flatt Austen K
• Nalco Co

Inventors

• Webber Peter A
• Conrad Peter G
• Flatt Austen K

Classifications

• C10L10/18

  use of detergents or dispersants for purposes not provided for in groups C10L10/02 - C10L10/16 · CPC title

• C07C237/06 Primary

  having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms · CPC title

• C10L3/107

  Limiting or prohibiting hydrate formation · CPC title

• C10L2200/0259

  Nitrogen containing compounds · CPC title

• C10L2200/029

  Salts, such as carbonates, oxides, hydroxides, percompounds, e.g. peroxides, perborates, nitrates, nitrites, sulfates, and silicates · CPC title