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Chelest Corporation and Chubu Chelest Co., Ltd.

Nobutake Mihara

Osamu Ito

Nobuyoshi Nambu

Takao Doi

Koujirou Nagatsuka

A chelate-forming filter which comprises a filter medium made of natural, regenerated, or synthetic fibers wherein the fiber molecules have, incorporated therein, chelate-forming functional groups represented by general formula (1) [wherein G represents a residue of a chain sugar alcohol or of a polyhydric alcohol; and R represents hydrogen, (lower) alkyl, or -G (wherein G has the same meaning as the above G, and the two G's may be the same or different)] or (3) (wherein R, R, and Reach represents lower alkylene; and n is an integer of 1 to 4).

Chelate-forming filter, process for producing the same, and method of purifying liquid using the filter

A chelate-forming fiber which has, in a fiber molecule, a group having an amino group and at least two hydroxyl groups bonded to carbon (preferably a group represented by the formula (1) described below), and has a capability of forming a chelate with metalloid elements including boron and germanium and compounds thereof, and which can be easily incinerated and can be prepared in a simple and safe manner at low cost; and a process for preparing the same; and a method for capturing metalloids or compounds thereof using the chelate-forming fiber are disclosed.

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Chiba, Japan

Nobutake Mihara