Anti-agglomerants for controlling gas hydrates

Patent metadata

Field	Value
Publication number	US-10281086-B2
Application number	US-201615231424-A
Country	US
Kind code	B2
Filing date	Aug 8, 2016
Priority date	Nov 26, 2013
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

The present invention generally relates to one or more compositions and methods for inhibiting the formation of gas hydrate agglomerates in a fluid. The fluid may be contained, for example, in an oil or gas pipeline or refinery.

First claim

What is claimed is:

1. A method for inhibiting gas hydrate agglomeration in a fluid comprising a hydrocarbon and water, the method comprising adding to the fluid an effective amount of a compound of formula 2A, 3A, 4A, 5A, or 7A to inhibit gas hydrate agglomeration in the fluid, wherein the compound of Formula 2A, 3A, 4A, 5A, or 7A corresponds to the following structures:

wherein
R 20 , R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , and R 29 are each independently hydrogen, alkyl, alkoxy, aminoalkyl, carboxyl, carboxyalkyl, alkenyl, alkenoxy; carboxyalkenyl, aryl, aryloxy, or carboxyaryl;
R 31 , R 32 , R 33 , and R 34 are each independently hydrogen, alkyl, alkoxy, aminoalkyl, carboxyl, carboxyalkyl, alkenyl, alkenoxy; carboxyalkenyl, aryl, aryloxy, or carboxyaryl;

R 2 is optionally substituted alkyl, alkenyl, or alkynyl;
Z is —NR 3 —C(O)—, —C(O)—NR 3 —, —O—C(O)—, —C(O)—O—, —S—C(O)—, —C(O) —S—, —O—C(O) —NR 3 —, —NR 3 —C(O)—O—, or —NR 3 —C(O) —NR 3 —;
R 3 is hydrogen or optionally substituted alkyl, alkenyl, alkynyl, or aryl; and
n is an integer from 0 to 25.

2. The method of claim 1 wherein
R 2 is C 10 -C 24 alkyl or alkenyl;
Z is —NR 3 —C(O) —or —C(O)—NR 3 —,
n is an integer from 0 to 12.

3. The method of claim 1 wherein Z is —C(O)—NR 3 —and R 3 is hydrogen.

4. The method of claim 3 wherein R 2 is C 10 -C 20 alkyl or alkenyl, and n is 2 or 3.

5. The method of claim 1 wherein the compound has the structure of Formula 3A

6. The method of claim 5 wherein R 31 , R 32 , R 33 , and R 34 are hydrogen, Z is —NR 3 —C(O)— or —C(O)—NR 3 —, R 3 is hydrogen, R 2 is C 10 -C 20 alkyl or alkenyl, and n is 2 or 3.

7. The method of claim 6 wherein Z is —C(O)—NR 3 —, and n is 2.

8. The method of claim 6 wherein Z is —NR 3 —C(O)—, and n is 3.

9. The method of claim 1 wherein the compound has the structure of Formula 4A

10. The method of claim 9 wherein R 32 , R 33 , and R 34 are hydrogen, Z is —NR 3 —C(O)—or —C(O)—NR 3 —, R 3 is hydrogen, R 2 is C 10 -C 20 alkyl or alkenyl, and n is 2 or 3.

11. The method of claim 9 wherein Z is —C(O)—NR 3 —, and n is 2.

12. The method of claim 9 wherein Z is —NR 3 —C(O)—, and n is 3.

13. A method for inhibiting gas hydrate agglomeration in a fluid comprising a hydrocarbon and water, the method comprising adding to the fluid an effective amount of a compound of formula 2A to inhibit gas hydrate agglomeration in the fluid, the compound having the structure

wherein
R 20 , R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , and R 29 are each independently hydrogen, alkyl, alkoxy, aminoalkyl, carboxyl, carboxyalkyl, alkenyl, alkenoxy; carboxyalkenyl, aryl, aryloxy, or carboxyaryl;
R 31 , R 32 , R 33 , and R 34 are each independently hydrogen, alkyl, alkoxy, aminoalkyl, carboxyl, carboxyalkyl, alkenyl, alkenoxy; carboxyalkenyl, aryl, aryloxy, or carboxyaryl;
R 2 is optionally substituted alkyl, alkenyl, or alkynyl;
Z is —NR 3 —C(O)—, —C(O)—NR 3 —, —O—C(O)—, —C(O)—O—, —S—C(O)—, —C(O)—S—, —O—C(O)—NR 3 —, —NR 3 —C(O)—O—, or —NR 3 —C(O)—NR 3 —;
R 3 is hydrogen or optionally substituted alkyl, alkenyl, alkynyl, or aryl; and
n is an integer from 0 to 25.

14. The method of claim 13 wherein R 20 , R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , and R 27 are hydrogen, Z is —NR 3 —C(O)—or —C(O)—NR 3 —, R 2 is C 10 -C 20 alkyl or alkenyl, and n is 2 or 3.

15. The method of claim 14 wherein Z is —C(O)—NR 3 —, R 3 is hydrogen, and n is 2.

16. The method of claim 14 wherein Z is —NR 3 —C(O)—, R 3 is hydrogen, and n is 3.

17. The method of claim 14 wherein R 3 is hydrogen.

Assignees

• Ecolab Usa Inc

Inventors

• Webber Peter A
• Nagappayya Sahana

Classifications

• C09K8/52 Primary

  Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning · CPC title

• F17D1/16 Primary

  Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity {(changing the flow or the viscosity by adding a chemical agent C09K3/00, C10M)} · CPC title

• C09K2208/22

  Hydrates inhibition by using well treatment fluids containing inhibitors of hydrate formers · CPC title

• C10G75/04

  by addition of antifouling agents · CPC title