Process for the production of regenerated humic acids from coal
US4788360A · kind A · utility
7Cited by
0References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1987 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Dec 8, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05F11/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process is disclosed for the production of humic acids, which comprises an oxidation of coal in dry phase with oxygen or mixtures of oxygen and nitrogen in a fluidized-bed reactor, by using coal with a granulometry comprised within the range of from 100 .mu.m to 3 mm and operating at a temperature comprised within the range of from 150.degree. to 300.degree. C., under a partial pressure of oxygen comprised within the range of from 1.1 abs.atm. to 10 abs.atm., for a contact time comprised within the range of from 30 minutes to 600 minutes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.