Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1993-11-05
1995-03-21
Prescott, Arthur C.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
203 15, 203 16, 203 51, 203 60, 203 61, C07C 5142
Patent
active
053997514
ABSTRACT:
Disclosed is a method for recovering carboxylic acids having from one to ten carbon atoms, and particularly formic acid, acetic acid and mixtures of formic and acetic acids, from aqueous solutions, in which the aqueous solution is contacted with solvent consisting essentially of mixed trialkylphosphine oxides in counter-current liquid-liquid extraction flow in a contacting step to thereby transfer the acids from the aqueous solution to the solvent, thus producing a raffinate relatively low in acid content and a rich solvent. The rich solvent is preferably dehydrated to separate water therefrom and yield a dehydrated rich solvent. The dehydrated rich solvent then has the acids stripped from it and the resulting lean solvent is then returned to the liquid-liquid extraction step, while the separated acids are split into their constituent components in a distillation operation.
REFERENCES:
patent: 1839932 (1932-01-01), Ricard et al.
patent: 2028800 (1936-01-01), Othmer
patent: 2033978 (1936-03-01), Dreyfus
patent: 2048441 (1936-08-01), Gordon
patent: 2159146 (1939-05-01), Guinot
patent: 2526508 (1950-10-01), Scheeline et al.
patent: 2574256 (1951-11-01), Flisik et al.
patent: 2588268 (1952-03-01), Mercer et al.
patent: 3040094 (1962-06-01), Stine et al.
patent: 3394058 (1968-07-01), Hohenschutz et al.
patent: 3470238 (1969-09-01), Asano
patent: 3816524 (1974-06-01), Grimstead
patent: 4353784 (1982-10-01), Koga et al.
patent: 4405717 (1983-09-01), Urbas
patent: 4551208 (1985-11-01), Bott et al.
patent: 4672219 (1987-06-01), Iwabuchi et al.
patent: 4729818 (1988-03-01), Berg
patent: 4735690 (1988-04-01), Berg et al.
patent: 4786370 (1988-11-01), Berg
patent: 4877490 (1989-10-01), Berg et al.
patent: 4909907 (1990-03-01), Berg
patent: 4935100 (1990-06-01), Berg et al.
patent: 5006205 (1991-04-01), Berg et al.
patent: 5160412 (1992-11-01), Berg
patent: 5167774 (1992-12-01), Berg
patent: 5173156 (1992-12-01), Berg et al.
patent: 5175357 (1992-12-01), Van Brunt
patent: 5227029 (1993-07-01), Berg et al.
American Cyanamid Company, "Organo-phosphines," Technical bulletin (Feb. 1990).
American Cyanamid Company, "CYANEX.RTM.Extractants," Technical bulletin (Mar. 1991).
American Cyanamid Company, "Solvent Extraction Reagent", Technical bulletin (Apr. 1991).
American Cyanamid Company, "The Recovery of Mineral Acids With CYANTEX.RTM.923 Extractant," Technical Bulletin No. 89-01 (1992).
Rickelton, W. A. and Boyle, R. J. "Solvent Extraction With Organophosphines -Commerical & Potential Applications," Cyanamid Canada Inc. (1993).
Robbins, Larry A., Ph.D., "Liquid-Liquid Extraction," Perry's Chemical Engineers' Handbook 6th Edition, Section 15, 1-19 (1984).
King, C. Judson, "Acetic Extraction," Handbook of Solvent Extraction, Section 18.5, 567-573 (1983).
Wardell, James M. and King, C. Judson, "Solvent Equilibria for Extraction of Carboxylic Acids from Water," Journal of Chemical and Engineering Data, vol. 23, No. 2 144-148 (1978).
Ricker, N. L., Michaels, J. N. and King, C. J., "Solvent Properties of Organic Bases for Extraction of Acetic Acid From Water," J. Separ. Proc. Technol., 1 (1) 36-41 (1979).
Ricker, N. L., Pittman, E. F. and King, C. J., "Solvent Extraction With Amines for Recovery of Acetic Acid From Dilute Aqueous Industrial Streams," J. Spear. Proc. Technol., 1 (2) 23-30 (1980).
Ricker, N. L. and King, C. J. "Solvent Extraction of Wastewaters From Acetic-Acid Manufacture," Robert S. Kerr Environmental Research Laboratory (Apr. 1980).
Kertes, A. S. and King, C. J., "Extraction Chemistry of Fermentation Product Carboxylic Acids," Biotechnology and Bioengineering, vol. XXVIII, 269-282 (Feb. 1986).
Gentry Joseph C.
Gualy Ronald G.
Holmes Timothy L.
McIntyre John C.
Glitsch, Inc.
Prescott Arthur C.
LandOfFree
Method for recovering carboxylic acids from aqueous solutions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for recovering carboxylic acids from aqueous solutions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovering carboxylic acids from aqueous solutions will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1150217