Halohydrocarbon recovery process

Details Halohydrocarbon recovery process Halohydrocarbon recovery process

1993-08-20

1994-12-20

Manoharan, Virginia

Distillation: processes, separatory

With disparate physical separation

Utilizing solid sorbent

34 73, 34 80, 68 18C, 68 18F, 203 78, 203 79, 203DIG16, 210774, B01D 338

Patent

active

053743377

ABSTRACT:
A halohydrocarbon solvent recovery process. The process in one embodiment includes heating a gross mixture including solvent, fatty-acid impurities and water in a bath to vaporize at least a portion of the solvent and the impurities. A portion of the vapor is then condensed in a reflux condenser to form a condensate mixture. After drying and impurity absorption, a solvent product of at least 99% purity may be recovered. In one embodiment, the gross mixture is obtained from steam stripping dry-cleaner filter cartridges.

REFERENCES:
patent: 4513590 (1985-04-01), Fine
patent: 4712392 (1987-12-01), Hagiwara et al.
patent: 4885099 (1989-12-01), Kelly
patent: 4898601 (1990-02-01), Casey
patent: 4938845 (1990-07-01), Kohler
patent: 5107605 (1992-04-01), Yamada
patent: 5139674 (1992-08-01), Abo
Hazardous Waste Reduction Technology--Research, Development and Demonstration Grant Program, Fiscal Year 1989-1990, State of California Department of Health Services, Toxic Substances Control Program, Alternative Technology Division, Waste Reduction Unit, "Complete Recycling for the Dry Cleaning Industry," p. 17.

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