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US 2025/0179347 A1Published application
Oligo(ethylene glycol) alkyl acrylate copolymers for controlling gas hydrates in a sour environment
AssigneeSaudi Arabian Oil Company
InventorsMuhammad Imran Ul-haq, Mram Alyami, Qasim Saleem, Taras Yurievich Makogon, Rashed Mohammad Aleisa, Venkateswara Reddy Ganugapenta
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Abstract
This disclosure relates to oligo(ethylene glycol) alkyl acrylate-based copolymers that are useful as kinetic hydrate inhibitors. Also provided are methods of preventing or inhibiting the formation of gas hydrates in natural gas, such as in a sour gas environment, using the kinetic hydrate inhibitors.
Claims30
A kinetic hydrate inhibitor (KHI) copolymer of Formula (I):
- wherein:
- X is N, O, or S;
- R1, R2, R3, R4, and R5 are each independently selected from the group consisting of H, C1-6 alkyl, —(C1-4 alkyl)ORa, —(C1-4 alkyl)NRbRc, 6-10 membered aryl, 5-10 membered heteroaryl, —(C1-4 alkyl)-6-10 membered aryl, —(C1-4 alkyl)-5-10 membered heteroaryl, and —C(═O)CH═CH2;
- Ra, Rb, and Rc are each independently selected from the group consisting of H and C1-6 alkyl;
- n is 1, 2, 3, or 4;
- and
- y
- +
- z
- =
- 1
- ;
- wherein the average molecular weight is from about 500 g/mol to about 10,000 g/mol;
- and
- wherein R4 is absent when X is O or S.
12 more elements
A method of inhibiting the formation of gas hydrates in natural gas, comprising:
- adding a composition comprising a kinetic hydrate inhibitor (KHI) copolymer of Formula (I) to a natural gas stream:
- wherein:
- X is N, O, or S;
- R1, R2, R3, R4, and R5 are each independently selected from the group consisting of H, C1-6 alkyl, —(C1-4 alkyl)ORa, —(C1-4 alkyl)NRbRc, 6-10 membered aryl, 5-10 membered heteroaryl, —(C1-4 alkyl)-6-10 membered aryl, —(C1-4 alkyl)-5-10 membered heteroaryl, and —C(═O)CH═CH2;
- Ra, Rb, and Rc are each independently selected from the group consisting of H and C1-6 alkyl;
- n is 1, 2, 3, or 4;
- and
- y
- +
- z
- =
- 1
- ;
- wherein the average molecular weight is from about 500 g/mol to about 10,000 g/mol;
- and
- wherein R4 is absent when X is O or S;
- thereby inhibiting the formation of gas hydrates in the natural gas.
14 more elements
Dependencies are inferred from the claim text.