Process for gas cleaning with reclaimed water
US4141695A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1978 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Apr 28, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10J2300/1892
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Dispersions comprising water and particulate solids i.e. carbon and ash are produced in at least one gas cooling or scrubbing zone by quench cooling or scrubbing, or both the raw gas stream from a partial oxidation gas generator with water. Advantageously, the water may be reclaimed by the subject process. In one embodiment, the carbon-water dispersion containing any ash is mixed with a liquid organic extractant and a liquid aqueous emulsion. The emulsion breaks up, and in a decanting operation a carbon-extractant-water dispersion containing gaseous impurities separates out and floats on a dilute bottoms water layer containing gaseous impurities and some solids. The carbon-extractant-water dispersion is mixed with a heavy liquid hydrocarbon and introduced into a distillation column. The overhead from the distillation column is cooled and separated into a layer of liquid extractant which floats on an aqueous emulsion principally comprising water and containing heavy oil, naphthenic acids and liquid organic extractant. The liquid aqueous emulsion and the liquid extractant are recycled to the decanting operation. In another scheme, the emulsion is mixed with the bottoms water from the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.