Method for producing long-chain fatty acid and glyceryl triacetate through grease

A technology of glycerol triacetate and long-chain fatty acids, which is applied in chemical instruments and methods, preparation of carboxylate esters, preparation of carboxylate esters/lactones, etc., can solve the problems of unavoidable discharge of small molecule toxic substances and high production costs, Achieve high selectivity and less by-products

Active Publication Date: 2019-03-01
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, triacetin is an important chemical solvent, reagent and fixative. The current production method is mainly obtained by catalytic esterification of glycerin with acetic acid and acetic anhydride, and trichloroethane and acetic acid or glycerin and acetyl It is prepared by dehydrochlorination of base chloride, and its production cost is generally high, and the discharge of small molecule toxic substances is unavoidable in the whole production process

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing long-chain fatty acid and glyceryl triacetate through grease
  • Method for producing long-chain fatty acid and glyceryl triacetate through grease
  • Method for producing long-chain fatty acid and glyceryl triacetate through grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Mix 1.0g glyceryl tristearate, 0.01g phosphotungstic acid and 0.2g glacial acetic acid, react at 120°C for 10h, filter at 60°C after the reaction is completed, and obtain phosphotungstic acid insoluble in acetic acid, cool the filtrate to 40°C, and filter The long-chain fatty acid solid that separates out, after the filtrate decompression distillation, reclaims acetic acid, and obtains glyceryl triacetate (see attached figure 1 , 2 , 3), the conversion rate of glyceryl tristearate is 100% through analysis, and the molar yield of glyceryl triacetate is 95%, and long-chain fatty acid (see attached Figure 4 and 5 ) are all octadecyl fatty acids, and the yield is 100%.

Embodiment 2

[0038] Mix 1.0g tallow oil, 0.05g benzenesulfonic acid and 100g mass percent concentration of 80% acetic acid aqueous solution, react at 140°C for 8h, after the reaction is completed, filter the precipitated long-chain fatty acid solid, and then distill the filtrate under reduced pressure, Reclaim acetic acid, add 0.01g organic solvent ethyl ether and leave standstill layering, obtain organic solution and the catalyzer after reaction, distill and remove organic solvent, obtain glyceryl triacetate, the conversion ratio of oil and fat is 100% through analysis, the glycerol triacetate The molar yield is 97%, and the long-chain fatty acids are all octadecyl fatty acids, and the yield is 98%.

Embodiment 3

[0040] Mix 1.0g of lard oil, 0.1g of p-toluenesulfonic acid and 80g of 90% acetic acid aqueous solution by mass, and react at 160°C for 4 hours. After the reaction is completed, filter the precipitated fatty acid solid, and then distill the filtrate under reduced pressure to recover Acetic acid, add 0.05g organic solvent chloroform and leave standstill layering, obtain organic solution and the catalyzer after reaction, distill and remove organic solvent, obtain glyceryl triacetate, the conversion rate of oil and fat is 100% through analysis, the mole of glyceryl triacetate The yield is 96%, and the long-chain fatty acids are all octadecyl fatty acids, and the yield is 96%.

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 provides a method for producing long-chain fatty acid and glyceryl triacetate through grease. The method comprises the following steps: sufficiently mixing the grease, acetic acid and acatalyst to prepare a catalytic reaction system; reacting at the temperature of 120 to 250 DEG C for 0.2 to 10 h; after reaction is finished, separating a reaction product to obtain the long-chain fatty acid and the glyceryl triacetate. The method provided by the invention has the advantages of low cost, low energy consumption and no pollution.

Description

technical field [0001] The invention relates to a method for producing long-chain fatty acid and glycerol triacetate from oil. technical background [0002] Long-chain fatty acids (with 16-22 carbon atoms in the molecule) are biomass-based chemical products obtained by catalytic hydrolysis of oils and fats, and are widely used in the fields of petroleum, chemical and fine chemicals. At present, long-chain fatty acids and glycerin are mainly produced by acid-base catalyzed hydrolysis. A large amount of water is needed in the hydrolysis process. After the reaction, the remaining large amount of water is mixed with the glycerol obtained by hydrolysis. 8 tons of long-chain fatty acids will produce 1 ton of glycerol, and the separation of two completely miscible substances, glycerol and water, is itself a highly energy-intensive process. [0003] In addition, glycerol triacetate is an important chemical solvent, reagent and fixative. The current production method is mainly obtai...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/10C07C69/18C07C51/09C07C53/126
CPCC07C51/09C07C67/10C07C69/18C07C53/126
Inventor 侯相林苏丽娟邓天昇王英雄
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap