摘要
以天然产物颗粒紫胶为原料，经无水亚硫酸钠保护下皂化、盐析等过程，提取用于香料工业的紫胶桐酸。提取过程中不加入任何有机溶剂，不必进行精制作业，可直接获得质量分数大干98％的紫胶桐酸产品。研究了皂化时间、皂化温度、盐析时间以及亚硫酸钠对紫胶桐酸收率的影响，获得提取过程的优化工艺条件：NaOH质量分数25％，料液比1：6，皂化时间96h，无水Na2SO3为紫胶质量的10％，盐析时间18h。并利用有机元素分析仪、红外光谱、显微溶点测定仪等手段表征了提取的紫胶桐酸结构。结果表明：在优化工艺条件下，紫胶桐酸质量分数可达98．85％～99．43％，收率可达24．64％～25．16％。
To make full use of shellac and to get the natural aleuritic acid from natural shellac, an extraction process of aleuritic acid with an important raw material synthesized civetone or dihydrocivetone in perfumery industry was developed in this paper. The fine products with a purity above 98% can be got in the process directly without any kind of organic reagent and refinery process. The influence factors, such as saponification time, saponification temperature, salting time and sodium sulfite etc. , on the yield of aleuritic acid have been investigated. The results demonstrated that the yield of aleuritic acid could reach 24. 64%～25.16%, and that the purity of final products could reach 98.85%～99.43% under the condition as follows：the optimal conditions were that saponification time is 96 h,the proportion of NaOH 25% in volume to shellac in weight was 6： 1, saponification temperature was 80℃, m（seedlac）：m（Na2SO3） was 10： 1; quantity of sodium sulfite, salting time, 18 h. Moreover the structure of the aleuritic acid extracted was also characterized through elementary analyzers, melting point meter, and infrared spectroscopy etc.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第2期88-92,共5页
Journal of Nanjing Forestry University：Natural Sciences Edition
关键词
香料
紫胶桐酸
紫胶
提取
Perfume
Aleuritic acid
Shellac
Extraction
