新型水溶性纤维素黄原酸酯的合成与表征及用于金回收的研究  

STUDISE ON THE PREPARATION AND CHARACTERIZATION OF WATER SOLUBLE CELLULOSE XANTHATE AND ITS APPLICATION IN THE RECOVERY OF GOLD

作　　者：曾晖扬[1] 李玮[1] 李卓美[1] 

机构地区：[1]中山大学高分子研究所

出　　处：《纤维素科学与技术》1993年第2期53-59,共7页Journal of Cellulose Science and Technology

基　　金：中国科学院广州化学研究所纤维素化学开放研究室资助课题

摘　　要：用羧甲基纤维素(CMC)与CS_2在一定条件下进行反应,合成了一种新型的水溶性纤维素衍生物纤维素黄原酸酯(CMCX)。用UV及IR谱进行表征,测得酯化度为3.0％,即含S量1.0％(重量比)。对其稳定性进行了较系统的研究。结果表明CMCX在固态比溶液状态稳定得多,找到了一种较有效的助凝剂CaCl_2。在CaCl_2和CMCX共同作用下,对于10mL浓度为10mg/L的金液,CMCX的用量为0.1g,作用时间1min,对金回收率可达96％。Several species of water soluble carboxyl methyl cellulose xanthate(CMCX) have been prepared by the reaction of CMC with CS_2 in aqueous solution. The product CMCX has been identified by UV spectrum. The degree of esterification is about 3.0％(i.e. 1.0％ of S in weight). It is more stablein the solid state than in the solution state. The efficiency of reovery Au from 10mg/L of Au aqueous solution can reach 96％ by using CaCl_2 as co—coagulant, and the reaction time is only 1 minute, pH does play an important role in increasing the efficiency of recovering Au, where the optimun pH value has been found to be 10-12. The optimum dosage of CMCX is 0.1 CMCX for 10mL of 10mg/L Au aqueous solution.

关 键 词：纤维素 黄原酸酯 金 分离 

分 类 号：TF831.032[冶金工程—有色金属冶金]