【発明の名称】フェノ-ル・アルデヒド系・キレ-ト樹脂の製造法及び吸着処理法

Japanese Patent JPS6051491

B2

A phenolic chelate resin has a chelate-forming group, wherein hydrogen atoms in a primary or secondary alkylamino group introduced in a phenol nucleus are substituted by a methylenephosphonate group. The phenolic chelate resin is produced by reacting a compound having a phenolic hydroxyl group and a primary and/or secondary alkylamino group in the same molecule with phosphorous acid and formaldehyde in the present of a mineral acid. The reaction is allowed to continue in order to form a reaction product wherein some or all of the hydrogen atoms in the alkylamino group are replaced by a methylenephosphonate group whereafter the resulting reaction product is condensed with a phenol and In order to recover a heavy mctal ion from an aqueous solution by selective adsorption, the solution is contacted with the phenolic chelate resin at 5 to 95 DEG C for 1 minute to 50 hours to allow a chelate to form.

SASAKI AKIO
ECHIGO YOSHIAKI

JP3635880A

November 14, 1985

March 22, 1980

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UNITIKA LTD

B01J20/26; B01J45/00; C02F1/28; C08G8/00; C08G8/16; C08G8/18; C08G8/24; C08G8/28; C08G14/12; C22B3/00; C22B60/02; (IPC1-7): C08G8/28; B01J20/26; B01J45/00; C08G8/16; C22B60/02

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