乙基麦芽酚绿色循环工艺中的含盐废酸循环利用  

Recovery of Salty Scrap Acid from the Green Circular Technology of Ethyl Maltol

作　　者：揭嘉[1] 南强[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《安徽化工》2007年第3期52-55,共4页Anhui Chemical Industry

基　　金：湖南省教育厅一般项目(项目编号:06C822)

摘　　要：针对乙基麦芽酚生产过程所产生的含盐废酸,采用气液固三相精馏联合脱盐的特殊方法,制得了可循环利用的盐酸。探索了精馏的最佳操作温度、压强、各物流的流速及回流比等工艺条件对精馏效果的影响。通过在一定温度区间脱盐,实现了废酸循环利用的连续化操作。In this paper, a particular triphase distillation for the recovery of salty scarp acid from the green circular technology of ethyl maltol（2-ethyl-3-hydroxy-4H-pyranone-4） is studied. Exploratory experiments indicate that purified hydrochloric acid can be concentrated to 12% from 2.5% steadily by a especial method of decompressed siding distillation associated with salt-removal. The optimum conditions of distillation are searched, such as temperature , pressure , concentration , velocity of different streams and ratio of refluence. In a low pressure of 40kPa, tile boiling point decreases to below 80℃,in these conditions, continuous recovery of scrap acid is realized through the salt-removal in a proper temperature range of 100-90℃.

关 键 词：乙基麦芽酚 绿色循环 含盐废酸 三相精馏 脱盐 

分 类 号：TQ655[化学工程—精细化工]