Acryloyl-based copolymers, terpolymers, and use as hydrate inhibitors
US11059926B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 11, 2019 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Dec 11, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymers having General Formula (I):in which R1 and R3 are chosen from divalent C4-C7 aliphatic groups and divalent C4-C7 heteroaliphatic groups, optionally substituted with one or more C1-C6 aliphatic groups, heteroatoms independently chosen from O, N, and S, or combinations thereof, where the divalent C4-C7 heteroaliphatic groups of R1 and R3 include one or two heteroatoms independently chosen from O, N, and S, and the maximum number of heteroatoms in R1 or R3 is two, R2 is chosen from Q1 and Q2, x is a molar fraction range chosen from 0.1 to 0.9, y is a molar fraction range chosen from 0.1 to 0.9, and z is a molar fraction range chosen from 0 to 0.8, where the summation of x, y, and z equals 1. Methods for inhibiting formation of clathrate hydrates include contacting a fluid with at least one copolymer of General Formula (I).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.