Stabilized suspensions of carbon or carbonaceous fuel particles in water
US5045087A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1988 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Feb 22, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L1/326
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of preparing a stabilized or partially stabilized suspension of particles of carbon or of carbonaceous fuel materials in water characterized by comminuting coal (or other carbonaceous material) to form predetermined sized particles and coating the particles with at least a partial external coating of attached alcohol molecules of alcohols having from one to four (1 to 4) carbon atoms and thereafter admixing the alcohol coated particles with water to form the substantially uniform suspensoid of high solids content for use as a fuel for direct combustion, or as a feedstock for atmospheric pressure gasifiers or for pressurized gasifiers, or as a transport fluid to facilitate transportation of carbonaceous fuels by pipeline or by other fluid handling means. The suspensoid can contain up to 75 percent by weight coal, but contains less than 8 percent by weight alcohol. In a preferred embodiment, coal particles are first compacted and then comminuted to the predetermined particle size range to form an abundance of platey, lenticular, irregular and angular particles for forming a mechanically stabilized suspensoid, after coating with alcohol molecules and mixing with water, that e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.