Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1989-05-16
1990-02-20
Hart, Charles
Gas separation
Means within gas stream for conducting concentrate to collector
55 48, 55 51, 55 59, B01D 500
Patent
active
049023101
ABSTRACT:
A process is provided for recovering halogenated hydrocarbons from solvent streams, particularly those including water and at least one alcohol, ketone or ester impurity. The process also provides for the recovery of the alcohol, ketone or ester, which can be reused or incinerated. The solvent stream is condensed and initially spearated into a halogenated hydrocarbon rich fraction and a water rich fraction containing the impurities. Impurities are removed from the halogenated hydrocarbon rich fraction in a first separation step, preferably liquid-liquid extraction with water. The impurities are extracted from the halogenated hydrocarbons into the water, which is passed to the water fraction of the initial separation step for further treatment. Halogenated hydrocarbons leaving the extraction column are passed to a distillation column where remaining water and impurities are removed. A continuous halogenated hydrocarbon vapor draw is preferably removed and condensed from the distillation column. The halogenated hydrocarbon product from the distillation column can, if necessary, be further dehydrated prior to storage or reuse. The water rich fraction is processed in one or more separation steps to remove remaining halogenated hydrocarbons and impurities. The halogenated hydrocarbons are removed in a first water rich fraction distillation step, and the impurities are removed from the water in a second water rich fraction distillation step.
REFERENCES:
patent: 2760594 (1956-08-01), Browning et al.
patent: 3343916 (1967-09-01), Cahn et al.
patent: 3883325 (1975-05-01), Fuhring et al.
patent: 3963461 (1976-06-01), Stockford et al.
patent: 4018704 (1977-04-01), Kuragano
patent: 4056369 (1977-11-01), Quackenbush
patent: 4219537 (1980-08-01), Steiner
patent: 4261716 (1981-04-01), Schwartz et al.
patent: 4276058 (1981-06-01), Dinsmore
patent: 4286972 (1981-09-01), Savage et al.
patent: 4289505 (1981-09-01), Hardison et al.
patent: 4331456 (1982-05-01), Schwartz et al.
patent: 4343629 (1982-08-01), Dinsmore et al.
patent: 4414003 (1983-11-01), Blaudszun
patent: 4487614 (1984-12-01), Yon
patent: 4553983 (1985-11-01), Baker
patent: 4661256 (1987-04-01), Johnson
patent: 4689054 (1987-08-01), Vara et al.
Operations Improvements, by M. S. Thomas, Exec. V.P., Vara, Int'l, "Focus on Solvent Recovery".
"Spontaneous Combustion of Carbon Beds", by A. A. Navjokos, Eastman Kodak, Rochester, N.Y.
"Vapor-Phase Adsorption Cuts Pollution, Recovers Solvents" by C. S. Parmele; W. L. O'Connell, H. S. Basdekis of Hydroscience, Inc.
Special Report: Volatile Organic Compounds by Paul N. Cheremisinoff.
Solvent Recovery System Controls Pollution While Saving Money (flyer by Vara Int'l).
Solvent Recover-Answer to Efficient Pollution Control in Production of Pressure-Sensitive Materials (flyer by Vara, Int'l).
Mestemaker Jerald L.
Vara Thomas E.
Hart Charles
Vara International Inc.
LandOfFree
Process for removing halogenated hydrocarbons from solvent strea does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for removing halogenated hydrocarbons from solvent strea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for removing halogenated hydrocarbons from solvent strea will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1613867