微波消解/AAS法测定分子筛中的镍含量  

Determination of nickel in molecular sieve catalyst by microwave digestion-atomic absorption spectrometry

作　　者：陈震[1] 贾隽涵 王宸宸 王永娟[1] 易玉峰[1] 丁福臣[1] 

机构地区：[1]北京石油化工学院化学工程系,北京102617

出　　处：《应用化工》2016年第11期2178-2181,共4页Applied Chemical Industry

基　　金：国家科技支撑计划课题(2015BAK16B03);北京石油化工学院研究生创新活动计划(15033981002/093);URT项目(2016J00066)

摘　　要：分子筛催化剂以及含有金属钨的催化剂在一般的微波消解体系下难以被消解。探索了以浓HCl、浓HCl+H_2O_2、浓HNO3+H_2O_2、王水、浓H_2SO4+H_2O_2、浓H_2SO4+浓HNO3、浓H_3PO4为消解体系,消解含金属钨的分子筛催化剂。找到了一种能在短时间内既能消解分子筛催化剂又可以消解含金属钨的浓H_3PO4消解体系。并通过原子吸收光谱法和分光光度法对催化剂中的镍含量进行了测量。该方法样品用量少、省时、省酸、操作简单、环境污染小。Molecular sieve catalysts and catalysts containing tungsten are difficult to be dissolved by mi -crowave in routine acidic digestion system .Acidic digestion system of concentrated hydrochloric acid ,con-centrated hydrochloric acid and hydrogen peroxide mixture ,concentrated nitric acid and hydrogen perox-ide mixture,nitrohydrochloric acid,concentrated sulphuric acid and hydrogen peroxide mixture ,concen-trated sulphuric acid and concentrated nitric acid mixture ,concentrated phosphoric acid were used to dis-solve molecular sieve catalysts containing tungsten by microwave .Concentrated phosphoric acid was found to be the suitable digestion system to dissolve the molecular sieve catalyst containing tungsten in a short period of time .The nickel content in the catalyst was measured by atomic absorption spectrometry and spectrophotometry.The method has the advantage of less sample needed ,high-speed,less acid needed, simplicity of operation and little of environmental pollution .

关 键 词：分子筛催化剂 微波消解 原子吸收光谱法 浓H3PO4 镍 

分 类 号：TQ138.1[化学工程—无机化工]