Invention Grant
- Patent Title: Method of recovering silver using anion-exchange resin
- Patent Title (中): 使用阴离子交换树脂回收银的方法
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Application No.: US12400636Application Date: 2009-03-09
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Publication No.: US08206595B2Publication Date: 2012-06-26
- Inventor: Hiroshi Hiai , Yoshifumi Abe
- Applicant: Hiroshi Hiai , Yoshifumi Abe
- Applicant Address: JP Tokyo
- Assignee: JX Nippon Mining & Metals
- Current Assignee: JX Nippon Mining & Metals
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2008-291222 20081113
- Main IPC: B01D15/04
- IPC: B01D15/04 ; C22B3/00 ; C22B3/04 ; C22B3/06 ; C22B11/06

Abstract:
The present invention provides a method of recovering silver safely and efficiently from a chloride or bromide bath containing various metals. Specifically, a method of recovering silver from a hydrochloric acid solution containing alkali and/or alkaline earth metal chloride, silver, copper and iron ions, comprising the steps of: (1) bringing the solution into contact with a strong-base anion-exchange resin to adsorb silver, copper, and iron on the anion-exchange resin; (2) then washing the anion-exchange resin with water to remove the adsorbed copper and iron; and (3) then bringing the ion-exchange resin into contact with a hydrochloric acid solution to elute the adsorbed silver, is provided.
Public/Granted literature
- US20100116093A1 METHOD OF RECOVERING SILVER USING ANION-EXCHANGE RESIN Public/Granted day:2010-05-13
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