Hydraulic drag reducing agents for low temperature applications
US5143635A · kind A · utility
9Cited by
1References
8Claims
0Family size
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Key dates
| Filing date | Nov 6, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Nov 6, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0391
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Heat exchange fluids have improved flow characteristics at low temperature by incorporation of specific surfactant drag reducing compositions. The drag reducing composition comprises (1) a quaternary ammonium surfactant and (2) a preferably stoichiometric or greater amount of an organic counterion. The counterion is preferably 2,6-dihydroxybenzoate which contains a negatively charged head group substituent and a hydroxyl group in both adjacent positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.