Coal-water slurry viscosity reduction using olefin/maleic acid salt copolymers
US4441888A · kind A · utility
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4References
4Claims
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Key dates
| Filing date | May 21, 1982 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | May 21, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved coal-water slurry of the type comprising at least 45% by weight of finely divided coal particles and a dispersing agent, said slurry being characterized as having a Brookfield viscosity at 60 rpm of less than 4,000 centipoise, the improvement which comprises adjusting the pH of said slurry to at least 6 and using as the dispersing agent, a water-soluble salt of an olefin/maleic acid copolymer having a molecular weight within the range of about between 3,000-50,000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.