氰化钠法生产EDTA钠盐先进工艺  

The advanced technology for producing sodium salt of EDTA from sodium cyanide synthesis route

作　　者：李生春 鲁春霞 

机构地区：[1]抚顺市老科学技术工作者协会,辽宁抚顺113008

出　　处：《精细与专用化学品》2011年第4期51-52,共2页Fine and Specialty Chemicals

摘　　要：与传统工艺(经由EDTA中间体)比较,氰化钠法生产EDTA钠盐先进工艺具有如下优点:由EDTA四钠原液生产二钠盐,减少3道工序,硫酸(100%)和氢氧化钠(100%)单耗分别降低0.350t/t和0.216t/t;由二钠盐生产四钠盐减少一道工序,硫酸和氢氧化钠单耗分别降低0.272t/t和0.173t/t;产品纯度99.3%～99.5%,产率93%～95%(以乙二胺计),达到文献水平。As compared with traditional technology（through intermediate of EDTA） sodium cyanide method is some advantage：Producing EDTA-2Na salt from a original solution of EDTA-4Na cut down three steps,and the consumptions of the H_2SO_4（100%） and NaOH（100%） cut down 0.350t/t and 0.216t/t respectively! Producing EDTA-4Na salt from the EDTA-2Na salt cut down one step,and the consumptions of the H_2SO_4 and the NaOH cut down 0.272t/t and 0.173t/t respectively;The products purity is 99.3%~99.5%,the yield is 93%～95%（on ethylene diamine）,either reach level of the literatures.

关 键 词：EDTA钠盐 氰化钠法 先进工艺 

分 类 号：TQ131.12[化学工程—无机化工]