Stabilized water slurries of carbonaceous materials
US4457762A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1983 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Jan 7, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/03
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Improved stabilized water slurries of carbonaceous materials are obtained by having present a condensation product or a salt thereof of a substituted phenol sulfonic acid which is PA1 (a) an arylphenol sulfonic acid, PA1 (b) an aralkylphenol sulfonic acid, PA1 (c) an arylphenol sulfonic acid and arylsulfonic acid mixture, or PA1 (d) an aralkylphenol sulfonic acid and arylsulfonic acid mixture, condensed with from about 0.5 to about 4.0 moles of formaldehyde per mole of sulfonic acid with the proviso that the weight ratio if substituted phenol sulfonic acid to arylsulfonic acid is from about 0.95:0.05 to about 0.05:0.95 in the mixtures, the condensation product being present in an amount sufficient to reduce viscosity of the water slurry of carbonaceous materials, to stabilize carbonaceous materials in the water network and to improve its pumpability. If desired, an acid form or a salt of the condensation product may be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.