Method for removing bismuth and antiomny from silver electrolyte


Application Number: 00126155
Application Date: 2000.08.23
Publication Number: 1339619
Publication Date: 2002.03.13
Priority Information:
International: C22B3/46;C25C1/20
Applicant(s) Name: Qiankun Gold and Silver Refining Co., Ltd., Inner Mongolia
Address:
Inventor(s) Name: Wu Genxi;Chen Daping;Xing Xiaofeng
Patent Agency Code: 15100
Patent Agent: wang du
Abstract The present invention provides a method of removing bismuth and antimony from silver electrolyte during electrolytic refining of silver. By utilizing the characteristic that the nitrate of bismuth and antimony capable of being hydrolyzed in low acidity condition, silver oxide and ammonia water are added into the silver electrolyte successively to produce deposit of bismuth and antimony, which is recovered through filtering with the sliver electrolyte being regulated with nitric acid and silver nitrate before being reused. The method has the advantages of simple operation, short purification time, the reuse of the electrolyte and less loss of noble metal.