香兰素生产过程中扁桃酸水溶液的高效氧化方法  

The High Efficient Oxidation Method of Mandelic Acid Solution in Production Process of Vanillin

作　　者：杜德祥 毛海舫[2] 周永军 邹炳其 方建业 俞胜超 

机构地区：[1]嘉兴中华化工有限责任公司,浙江嘉兴314006 [2]上海应用技术学院,上海201418

出　　处：《香料香精化妆品》2014年第3期8-10,共3页Flavour Fragrance Cosmetics

摘　　要：介绍了-种对愈创木酚和乙醛酸缩合反应产物3-甲氧基-4-羟基-扁桃酸（下称扁桃酸）水溶液进行高效氧化的方法。将溶解有扁桃酸的水溶液pH调至12．0～14．5，然后按扁桃酸和氧化铜摩尔比1．00：1．15混合后加入自吸式反应釜中，搅拌加热到80℃以上，开始通入氧气进行氧化反应，反应时温度控制在80～120℃，至反应体系不再消耗氧气时为反应终点。反成液再经过固液分离、脱羧反应得到香兰素。反应工艺得到了简化，减少了反应时间，保证氧化反应在2h之内完成的同时，可以降低废水中TOC（总有机碳）含量35％以上．还能大大降低反应设备的体积从而减少设备投资。A high efficient oxidation method of mandelic acid solution （main component was 3-methoxy-4-hydroxy mandelic acid） resulting from condensation of guaiacol and glyoxylic acid was introduced in this paper. First, the pH of this aqueous solution was adjusted to 12.0 - 14. 5, then it was mixed with copper oxide in molar ratio of 1.00 to 1.15 and added to a self-priming reactor, heated to over 80 ℃ under stirring, oxygen was introduced to conduct the oxidation reaction, the reaction temperature was controlled at 80 - 120℃, the end point of reaction was reached when no oxygen was consumed. After solid-liquid separation and decarhoxylation of the reaction solution, the vanillin was obtained. The method could simply the process, reduce the reaction time, ensured the completion of reaction within 2 h, also it reduced the content of TOC in waste water by more than 35%, and greatly reduced the volume of the reaction equipment to decrease equipment investment finally.

关 键 词：香兰素 扁桃酸 氧化铜 自吸式反应釜 氧化 

分 类 号：TS264.3[轻工技术与工程—发酵工程]