Paraffin inhibitor/PPD products with vinyl acetate-alkyl acrylate/methacrylate copolymers combined with ethylene-based copolymers
US11667860B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Jun 20, 2021 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | Jun 20, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L2230/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A stabilized paraffin inhibitor/pour point depressant (PI/PPD) product formulation is described which includes a copolymer having a monomer selected from the group consisting of alkyl acrylate polymers, alkyl methacrylate polymers, and combinations thereof, where the copolymer comprises vinyl acetate and the product includes an ethylene-based copolymer. The presence of the vinyl acetate stabilizes the product to prevent or inhibit the ethylene-based copolymer from separating out of the product. The product is useful to reduce paraffin deposition and/or improve flow characteristics of petroleum fluids, such as crude oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.