Charged porous filter

Details Charged porous filter Charged porous filter

1989-12-27

1992-05-19

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050042, B01D 6900

Patent

active

051145855

ABSTRACT:
A process for preparing charge modified filtration media including the steps of forming a filtration microporous or macroporous membranous or nonmembranous medium structure having internal and external surfaces and including a quaternizable nitrogen containing polymer exposed at the internal and external surfaces, permanently charging the exposed quaternizable nitrogen, and rendering the polymer insoluble in solution and permanently adhered within the filtration medium structure.
Charge modified filtration media including a filtration medium structure as described having internal and external surfaces, characterized by a quaternizable nitrogen containing polymer exposed at the internal and external surfaces and having permanently charged quaternizable nitrogen. The quaternized nitrogen containing polymer is insoluble in solution and permanently adhered within the filtration medium structure.

REFERENCES:
patent: 2783894 (1957-03-01), Levell et al.
patent: 3408315 (1968-10-01), Paine
patent: 3553067 (1971-01-01), Dwyer et al.
patent: 3594263 (1971-07-01), Dwyer et al.
patent: 3759773 (1973-09-01), Dwyer et al.
patent: 3843324 (1974-10-01), Edelman et al.
patent: 3875044 (1975-04-01), Renn et al.
patent: 3876738 (1975-04-01), Marinaccio et al.
patent: 3878100 (1975-04-01), Bixler
patent: 3927242 (1975-12-01), Rembaum et al.
patent: 3963662 (1976-06-01), Fujiwara et al.
patent: 4045352 (1977-08-01), Rembaum et al.
patent: 4048038 (1977-09-01), Kunkle
patent: 4102827 (1978-07-01), Rembaum et al.
patent: 4106920 (1978-08-01), Hughes et al.
patent: 4116889 (1978-09-01), Chlanda et al.
patent: 4128470 (1978-12-01), Hiratsuka et al.
patent: 4243507 (1981-01-01), Martin et al.
patent: 4297198 (1981-10-01), Ohashi et al.
patent: 4352884 (1982-10-01), Nakashima et al.
patent: 4415428 (1983-11-01), Nochumson et al.
patent: 4455370 (1984-06-01), Bartlesman et al.
patent: 4473474 (1984-09-01), Ostreicher et al.
patent: 4473475 (1984-09-01), Barnes, Jr. et al.
patent: 4512896 (1985-04-01), Gershoni
patent: 4707266 (1987-11-01), Degen et al.
"Zetabind.TM.", marketed by Cuno, a subsidiary of AMF Incorporated, 1983.
E. M. Southern, "Detection of Specific Sequences Among DNA Fragments Separated by Gel Electrophoresis", Journal of Molecular Biology, vol. 98, pp. 503-507, 1975.
M. Bittner, P. Kupferer, & C. F. Morris, "Electrophoretic Transfer of Proteins and Nucleic Acids from Slab Gels to Diazobenzyloxymethyl Gellulose or Nitrocellulose Sheets", Analytical Biochemistry, vol. 102, pp. 459-471, 1980.
"Durapore.TM. Membrane Disc Filter", by Millipore Corporation.
J. Reisner, J. Ronart & G. R. Stark, "Transfer of Small DNA Fragments from Polyacrylamide Gels to Diazobenzyloxymethyl-Paper & Detection of Hybridization with DNA Probes", Biochemical & Biophysical Research Communications, vol. 85, No. 3, pp. 1104-1112, 1978.
D. S. Singer, "Arrangement of a Highly Repeated DNA Sequence in the Genome and Chromatin of the African Green Monkey", Journal of Biological Chemistry, vol. 354, No. 12, pp. 5506-5514, 1979.
P. S. Thomas, "Hybridization of Denatured RNA and Small DNA Fragments Transferred to Nitrocellulose", Proceedings of National Academy of Science, U.S., vol. 77, No. 9, pp. 5201-5205, Sep. 1980.
J. M. Gershoni & G. E. Palade, "Electrophoretic Transfer of Proteins from Sodium Dodecyl Sulfate-Polyacrylamide Gels to Positively Charged Membrane Filter", Analytical Biochemistry, vol. 124, pp. 396-405, 1982.
Six letters which discuss nitrocellulose membranes written by Bart Bartelsman, dated Nov. 6, 1980; Dec. 18, 1980; Dec. 30, 1980; Jan. 15, 1981 (3).
P. Aptel & I. Cabasso, "Novel Polymer Alloy Membranes Composed of Poly(4-Vinyl Pyridine) and Cellulose Acetate. I. Asymmetric Membranes", Journal of Applied Polymer Science, vol. 25, pp. 1969-1989, 1980.

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