Refrigeration – Processes – Fractionally solidifying a constituent and separating the same
Reexamination Certificate
2006-10-31
2006-10-31
Doerrler, William C. (Department: 3744)
Refrigeration
Processes
Fractionally solidifying a constituent and separating the same
C062S123000, C210S774000, C023S304000
Reexamination Certificate
active
07127913
ABSTRACT:
The invention is directed to a process for recovering a crystalline material from an aqueous solution, which solution also contains organic contaminants, in which process the material is crystallised from the aqueous solution by freeze crystallising at a eutectic freezing point of the solution.
REFERENCES:
patent: 3218188 (1965-11-01), Lippe et al.
patent: 3684532 (1972-08-01), Gottesman et al.
patent: 3779030 (1973-12-01), Best
patent: 3918916 (1975-11-01), Garrett
patent: 4025573 (1977-05-01), Hathway
patent: 4093516 (1978-06-01), Lang
patent: 4164854 (1979-08-01), Martin
patent: 4392959 (1983-07-01), Coillet
patent: 4504356 (1985-03-01), Mulder et al.
patent: 4654064 (1987-03-01), Cheng et al.
patent: 5037463 (1991-08-01), Engdahl et al.
patent: 5174859 (1992-12-01), Rittof et al.
patent: 5558778 (1996-09-01), Janssen et al.
patent: 5814231 (1998-09-01), Borho et al.
patent: 6159382 (2000-12-01), Conant et al.
patent: 0744430 (1956-02-01), None
Van der Ham, F., Witkamp, G.J., De Graauw, J., Van Rosmalen, G.M. “Eutectic freeze crystallization: Application to process streams and waste water purification.” Chemical Engineering and Processing, 37 (Mar. 1998), pp. 207-213.
Barduhn, Allen J. “Waste-Water Renovation: Part 1. A Design Study of Freezing and Gas Hydrate Formation.” U.S. Dept. of Health, Education, and Welfare. Public Health Service Publication No. 999-WP-4. Oct. 1963.
Stepakoff, G. L. et al. “Developement of a Eutectic Freezing Process for Brine Disposal.” Desalination 14 (1974) 25-38.
Barduhn, Allen J. and Manudhane, Avinash. “Temperatures Required for Eutectic Freezing of Natural Waters.” Desalination 28 (1979) 233-241.
van der Ham, F. et al. “Eutectic freeze crystallization simultaneous formation and separation of two solid phases.” Journal of Crystal Growth 198/199 (1999) 744-748.
de Graauw Johannes
van der Ham Frank
Vrijenhoef Johannes Pieter
Witkamp Geert-Jan
Doerrler William C.
Fitch Even Tabin & Flannery
Kemira GrowHow Oyj
Technische Universiteit Delft
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