Saga University

Denso Corporation

Tanaka Kikinzoku Kogyo K.k.

Katsutoshi Inoue

Keisuke Ohto

Kinya Atsumi

Minoru Kurata

Hidetaka Kawakita

Toshiyuki Morishita

Hiroaki Fukuda

Hisaya Kato

Takaaki Shinohara

Shinya Wakisaka

Kazuharu Yoshizuka

Yoshinari Baba

Masato Tazaki

A noble metal adsorption agent includes algae or residue of algae having an amino group as a functional group. A noble metal is retrieved by a method including: adsorbing the noble metal on the noble metal adsorption agent; and retrieving the noble metal. The noble metal is solved in a liquid. Thus, by using the noble metal adsorption agent, the noble metal is selectively retrieved.

Adsorption agent for noble metal, method for manufacturing the same, and method for recovering noble metal

An adsorbent contains a carbohydrate having an ether linkage. Alternatively, an adsorbent contains a carbohydrate having a cross-linkage formation produced by a dehydration reaction using a strong acid. In collection of a precious metal using the adsorbent, the adsorbent selectively adsorbs a precious metal dissolved in a solution.

Adsorbent and method of collecting precious metal using the same

This invention relates to an adsorbent made up of calix &lsqb;4&rsqb; arene polymer having a repeating unit, a method of separating divalent lead ions shown by the following chemical formula and a method of manufacturing the same.

Calix &lsqb;4&rsqb; arene polymer, method of manufacturing the same and method of separating divalent lead ion by use of the same

Disclosed herein are an extracting agent for precious metal having the below foretold and a process of extracting precious metals employing the said extracting agent from a hydrochloric acid solution containing the precious metals. Further, by controlling the concentration of the hydrochloric acid solution and the extraction time, the separation of the metals can be performed. ##STR1##

Extraction agent for palladium and platinum and process of extracting

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Saga, Japan

Katsutoshi Inoue