酸碱处理_溶剂萃取法提取废旧电脑线路板中的金.pdf

33 5 Vol33 No5 2008 5 ENVIRONMENTAL SCIENCE AND MANAGEMENT May 2008 : 1673- 1212(2008) 05- 0121- 04 - 吴德东,赵光楠 (, 150040) :采用酸碱法溶出电脑线路板中的贱金属,用王水制备金贵液, 然后 用萃取容量较大的甲基异 丁基甲 酮进行萃金研究,结果表明:在相比为 0. 6振荡萃取频率( 100 r/m in)萃取时间 15 min温度 40 时,M IBK萃 金的效果最佳, 一次萃取率可达到 9714 , 当金贵液中金含量大于 30 g时, 在以上条件下, 萃取率可达到 98 以上; 用 5 的草酸进行金的反萃取,在 70 反萃 40m in其反萃率可达 98 以上;在 120 条件下蒸馏 冷凝回收有机相中的甲基异 丁基甲酮,其回收率大于 98 ,节约萃取成本的同时, 可提高试剂的利用效率 : 电脑线路板; 酸碱法;萃取率; MIBK : X591 : A ExtractGold in ComputerCircuitBoards byAcid- BaseTechnology- SolventExtraction Wu Dedong, ZhaoGuangnan (EnvironmentScience, NEFU, Harbin 150040, China) Abstract:Acid- BaseTechnology leaching ofbasemetals in computer circuitboards, then preparation of gold liquidwith aqua regia, and study onMIBKwith largerextraction capacity extractgold, resultsshowed that: organic phase rate is0. 6, oscil lating extracts frequency is( 100 r/min), extraction tmi e is 15 gm inutes, temperature is 40, extraction rate is97. 14 , when gold content in the gold liquid ismore than30g, extraction rate ismore than98 ; Selection of5 Oxalate for the anti- ex traction ofgold, stripping 40minutes in 70 , stripping rate ismore than98 , distillation and condensate recovery ofMIBK in the organicphase at120 , the recovery ismore than 98 . save the costof extraction, atthe same tmi e mi prove the use effi ciency of reagen.t eywords: computer circuitboards; acid- base technology; extraction rate; MIBK Au , , , , [ 5] , [ 1] , ,, , , , MIBK,