Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1989-05-05
1990-11-13
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210639, 210651, 21050023, 21050027, B01D 6302
Patent
active
049700014
ABSTRACT:
Improvement in cross-flow membrane filtration. Chitosan is admixed with an aqueous dispersion of colloids or finely divided solids to flocculate the solids. The chitosan-flocculated liquid is then filtered on a membrane by cross-flow under pressure. A layer of chitosan-containing flocculant material deposits on the membrane and provides superior flux performance as compared to certain commerical flocculants.
REFERENCES:
patent: 3228877 (1966-01-01), Mahon
patent: 4089778 (1978-05-01), Gauger
Rohm & Haas Product Literature, (1987/1988), Knorr, Dietrich; "Functional Properties of Chitin and Chitosan", J. Food Sci., 47, 593-594 (1982).
Bough, Wayne, "Reduction of Suspended Solids in Vegetable Canning Waste Effluents by Coagulation with Chitosan", J. Food Sci., 40, 297-301 (1975).
Bough, Wayne; "Chitosan--a Polymer from Seafood Waste, for Use in Treatment of Food Processing Wastes and Activated Sludge", Processing Biochemistry, Jan./Feb. 1976, pp. 13-16.
Seng, Jean-Marc, "Chitine, Chitosane et Derives: De Nouvelles Perspectives pour L'Industrie"; Biofutur, Sep. 1988, 40-44.
Freeman, Karen; "Chitin Companies Not Crabby about Their Prospects for Growth and Profit", Genetic Eng. News, Jun. 1987, p. 2.
Amano et al; Filter Papers Containing Chitosan with Cellulose Fibers, Diatomaceous Earth, and/or Pearlite, Mar. 2, 1988, CA 109(22):197232a.
Asao et al.; Manufacture of Chitosan Paper with Good Quality and Increased Tensile Strength, Mar. 15, 1988, CA 109(2):8297s.
Mochizuki et al.; Separation of Liquid Mixtures by Pervaporation Membrane; Jan. 23, 1988, CA 108(20):170105d.
Hashimoto et al.; Low Molecular Weight Chitosans for the Removal of Nucleic Acids and/or Endotoxins from Liquid Samples on Small or Large Scale; CA 108(19):166107p.
Uemura et al.; Porous Polymer Sheets with Moisture Absorbing and Desorbing Properties; Nov. 4, 1987; CA 108(8):57558r.
Furukawa et al.; Chitosan Membranes for Separation of Liquid Mixtures; CA 106(26):215980n.
Morita, I.; Water Purifying Agent, Dec. 20, 1986, CA 106(16):125690p.
Kurita Water Industries, Ltd.; Sludege Dewatering; May 28, 1984; CA 101(18):15714v.
Pittalis et al., Hollow Chitosan Fibers; Apr. 20, 1983; CA 99(6):39744q.
Agency of Industrial Sciences & Technology; Chitosan Membranes Suitable for Ultrafiltration and Dialysis; Jun. 20, 1980; CA 93(24):222510a.
Fujita, T.; Recovery of Proteins; Jan. 17, 1972, CA 76(17):98205n.
Appleby Vanessa L.
Krafte Jill H.
Spear Frank
Trinker Steven T.
W. R. Grace & Co.,-Conn.
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