Toray Industries, Inc.

Mutsuo Murakami

Kazuo Teramoto

Yoshinari Fusaoka

Yasushi Tateishi

Toru Tani

Masashi Kodama

By Yoshimasa Katayama, Heir

By Shigemasa Katayama, Heir

Yutaka Katayama, Deceased

By Nobuko Katayama, Heir

The present invention relates to a composite semipermeable membrane which is characterized in that it is a composite semipermeable membrane in which there is formed by polycondensation on top of a microporous support membrane a crosslinked polyamide ultra-thin membrane layer from polyfunctional amine, polyfunctional acid halide and polyfunctional acid anhydride halide, and the flow of water permeate at an operating pressure of 0.3 MPa, a temperature of 25&deg; C. and a pH of 6.5 lies in the range from 0.8 to 4.0 m /m .day and, furthermore, the percentage humic acid removal is at least 98%; a method for the production thereof; and a water purification method employing same. With the composite semipermeable membrane obtained by means of the present invention it is possible, in particular, to recover drinking water at a high rate by permitting passage of silica and preventing deposition thereof at the membrane surface while selectively separating/removing the pollutants and trace quantities of harmful materials and their precursors, etc, contained in the raw water in water treatment plants.

Composite semipermeable membrane, processfor producing the same, and method of purifying water with the same

Lipopolysaccharides derived from the cell walls of Gram-negative bacteria, also known as endotoxins or pyrogens, are immobilized on a solid, insoluble carrier. The blood, blood plasma or blood serum of a tumor-bearing patient is passed over the immobilized lipopolysaccharide-containing blood treating material to treat the patient's tumor.

Method of treating malignant tumors

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Shiga, Japan

Mutsuo Murakami