SILVER RECYCLING FROM PHOTOGRAPHIC BLEACH-FIX BATHS BY IONIC FLOTATION AND THERMAL-DECOMPOSITION AND REUSE OF THE BATHS

被引：6

作者：

JDID, EA

HAKKOU, R

BLAZY, P

ELAMARI, K

机构：

[1] Centre De Recherche Sur La Valorisation Des Minerais, Laboratoire Environnement Et Mineralurgie Ua Cnrs 235, Cedex 54 501, B.P. 40, Vandoeuvre

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 1995年 / 30卷 / 10期

关键词：

D O I：

10.1080/01496399508013902

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Silver was recovered selectively by ionic flotation from photographic bleach-fix solutions containing Fe-EDTA. The collector chosen was sodium di-isobutyldithiophosphinate (Aerophine 3418A), which gives a well flocculated precipitate containing 34% Ag and floats in less than 5 minutes. For a collector concentration ranging between once and twice the silver concentration, the recovery rates reach 99% and they are not significantly affected by a pH variation from 4 to 8 and a temperature increase between 20 and 40 degrees C. The desilvered solutions can be recycled in photographic processing, and pure metallic silver at 99.9% Ag is easily obtained from the precipitate phase by thermal decomposition at 900 degrees C.

引用

页码：2211 / 2221

页数：11