Minimizing evaporator scaling and recovery of salts during gasification
US6086722A · kind A · utility
18Cited by
9References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1997 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Jul 9, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S159/13
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for minimizing evaporator scaling during the recovery of liquids and solids from the aqueous effluent discharged during a partial oxidation gasification, wherein the aqueous effluent contains ammonium chloride (NH.sub.4 Cl). The aqueous effluent is evaporated to produce a distillate water and a brine having an NH.sub.4 Cl concentration of about 10 to 60 weight percent. The brine can be further concentrated and ammonium chloride crystals are recovered. The distillate water is recycled to the gasification reaction. No effluent discharges to the environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.