Unlock instant, AI-driven research and patent intelligence for your innovation.

Stearolactone synthesis process

A technology of stearic lactone and synthesis process, applied in the direction of organic chemistry, can solve the problems of complex operation, high cost, low yield of stearic lactone, etc., and achieve high reaction efficiency, short reaction time and high purity Effect

Inactive Publication Date: 2016-06-22
JIANGNAN UNIV
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Domestic research on stearic lactone has not been reported, and there are relatively few studies on the synthesis process of stearic lactone abroad, and there are problems such as high cost, complicated operation, and low yield of stearic lactone.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] In a 100mL three-necked flask equipped with a stirrer, condenser, and dropping funnel, add 18.8g of the raw material industrial grade oleic acid to 20mL of solvent dichloromethane, and then add concentrated sulfuric acid catalyst into the three-necked flask through the dropping funnel. The molar ratio of oleic acid to concentrated sulfuric acid is 1:2. Stir while adding dropwise. The addition is completed in 30 minutes. Stir under normal pressure. The reaction temperature is 40°C and the reaction time is 6 hours. After the reaction, the reaction mixture is transferred to a separatory funnel. Wash and extract the stearic acid lactone, add 50mL deionized water to the separatory funnel, wash 3 times, then add 200mL anhydrous ether, let stand for 30min, separate the ether layer, add 15g anhydrous sodium sulfate to it Drying, then suction filtration to obtain the filtrate, and then rotary evaporation to remove the anhydrous ether to obtain the crude stearic acid lactone produc...

Embodiment 2

[0013] In the case where the synthesis process of stearic acid lactone is exactly the same as in Example 1, only the solvent methylene chloride in the synthesis process is changed to chloroform to obtain stearic acid lactone. Quantitative analysis by GC showed that the yield of stearic lactone was 73.37%.

Embodiment 3

[0015] In the case where the synthesis process of stearic acid lactone is exactly the same as in Example 1, only the solvent methylene chloride in the synthesis process is changed to n-hexane to obtain stearic acid lactone. Quantitative analysis by GC showed that the yield of stearic acid lactone was 74.27%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a stearolactone synthesis process. Cheap industrial-grade oleic acid is used as the basic raw material, stearolactone is synthesized under the catalysis of concentrated sulfuric acid, and then separation and purification steps including washing, extraction, drying and reduced pressure distillation are conducted to obtain a stearolactone product. The raw materials are easy to obtain, equipment operation is easy, reaction conditions are mild, production cost is low, and the yield of the stearolactone product is high.

Description

Technical field [0001] The invention relates to the technical field of the synthesis of fragrance additives in the fields of food, daily cosmetics and the like, and in particular to a synthesis process of stearic acid lactone. Background technique [0002] Stearic acid lactone includes γ-stearic acid lactone and δ-stearic acid lactone. Stearic acid lactone is a kind of fragrance substance commonly used in the daily chemical industry. It has the characteristics of ester compounds and also has a unique fragrance. For example, γ-stearic acid lactone has a fruity fragrance, while δ-stearic acid lactone Has a soft milk fragrance. Because stearic acid lactone has the characteristics of long-lasting fragrance, soft fragrance and fragrance enhancement, it has been widely used in the fields of food, daily cosmetics and tobacco fragrances, and its application prospects are very broad. [0003] Domestic research on stearic acid lactone has not been reported, and there are relatively few res...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07D307/06
CPCC07D307/06
Inventor 范明明王灿张萍波倪邦庆
Owner JIANGNAN UNIV