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无污染制备硝酸银溶液的方法

申请公布号:CN1073412A

申请号:CN92111959.3

申请日期:1992.11.04

申请公布日期:1993.06.23

申请人:
四川省环境保护科研监测所

发明人:龙炳清;谭孔庚;孙倩云;吴瑞鉴;金锡信;宁联会

分类号:C01G5/00

主分类号:C01G5/00

代理机构:
四川省专利服务中心

代理人:郭肖凌

地址:610041四川省成都市人民南路四段18号

摘要:本发明介绍的无污染制备硝酸银溶液的方法,是将银置于耐压耐酸反应器中压入硝酸,再通入氧气,使硝酸在溶解银的过程中产生的氮氧化物在反应器内经氧气氧化再生为硝酸,从而无氮氧化物溢出反应器,彻底消除了氮氧化物对环境的污染。也降低了硝酸消耗和避免了银的损耗。

主权项:1、无污染制备硝酸银溶液的方法,将银溶解于硝酸溶液中,其特征是将银料置入耐压大于1MPa、耐硝酸腐蚀的压力反应器中,先压入硝酸溶液,然后通入氧气,控制反应温度,硝酸的初始浓度为50~450g/l,之后根据后续生产需要控制银和硝酸加入量,氧气压力为0.2~0.5MPa,反应温度为25~100℃,反应时间1~24小时,反应结束后放出的溶液即为硝酸银溶液,本方法的化学反应方程式为即,使HNO3溶解银时产生的NOx在反应器内经氧气氧化再生为硝酸,从而无NOx溢出反应器。

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