Process for the separation of entrained organic fluids from gaseous streams in a coal deashing system
US4415442A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1981 |
| Grant date | Nov 15, 1983 |
| Priority date | — |
| Expiry date | Sep 24, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/045
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the prevention of the deposition of entrained soluble coal products from vaporous solvent recovered from a heavy fraction comprising insoluble coal products and some solvent and soluble coal products. The heavy fraction is produced in a coal deashing system employing solvent at elevated temperatures and pressures near the critical conditions of the solvent. The heavy fraction is reduced in pressure to form a mixture of ash concentrate and vaporous solvent together with entrained soluble coal products. This mixture then is turbulently admixed for at least 0.05 seconds to coalesce or condense the entrained soluble coal products upon the ash concentrate particles. The coalescence or condensation of at least a portion of the soluble coal products substantially prevents or minimizes deposition of the same in the solvent withdrawal conduit of subsequent vapor-solid separation apparatus. Alternatively, the mixture is introduced into a fluidized bed of ash concentrate. The entrained soluble coal products then coalesce or condense on the fluidized particles by contacting the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.