Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing glycerol triacetate

A technology of triacetin and glycerol, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of high energy consumption, high product chroma, easy polymerization of products, etc. The effect of thorough chemical reaction, sufficient esterification reaction, and improvement of product quality and stability

Active Publication Date: 2013-04-10
湖南先伟阳光生物科技有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has disadvantages such as high energy consumption, easy polymerization of the product at high temperature, and high chroma of the product.

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 preparing glycerol triacetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Using the mechanism of acid alcohol esterification reaction, the esterification reaction adopts rectification technology, adding glycerin, glacial acetic acid, acid catalyst, and azeotropic dehydrating agent into the reaction kettle with glass tower and condenser for reaction, and the mixed materials in the reaction kettle pass through the pump Press into the external external circulation evaporator, control the temperature of the reaction kettle at about 100°C, the temperature inside the external circulation evaporator is about 110°C, and continuously remove the water produced by the reaction at the top of the tower through the external circulation evaporator, and the azeotrope returns to the tower middle. The crude product is sent to the acylation kettle, and then deacidified after adding acetic anhydride to react to obtain the crude product of glycerol triacetate;

[0027] Put the measured crude product of triacetin into the refining kettle, and put into the activate...

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 method for preparing glycerol triacetate, which aims to make completer esterification, shorten reaction time, reduce side reaction, increase the yield of product and product content and improve the chromaticity of the product. The method comprises the following steps of: performing the esterification, acylation and deacidification on glycerol and a glacial acetic acid toprepare a glycerol triacetate crude product, wherein water distribution is performed in the esterification process by adopting an external circulating evaporator; and de-coloring the glycerol triacetate crude product obtained by the acylation and deacidification by adopting activated carbon, separating a head fraction, and performing cooling and circulating filtration to form the high-content glycerol triacetate. The invention discloses the economic and environmentally-friendly method for preparing the glycerol triacetate, which greatly improves the quality of product, reduces the post-treatment steps of the product, reduces energy consumption and brings the dual effects of process optimization, and energy saving and consumption reduction.

Description

technical field [0001] The invention belongs to the field of separation and purification of chemical products, and relates to a method for preparing triacetin by using an external circulation evaporator for esterification and water separation. Background technique [0002] Glyceryl triacetate, also known as glycerol triacetate. English name Glycerol Triacetate, molecular formula C 9 h 14 o 6 , Molecular weight 218.21, colorless and odorless oily liquid, non-toxic and non-irritating. Triacetin is soluble in alcohol, ether, benzene, chloroform, and castor oil, but not in linseed oil. Can dissolve nitrocellulose, acrylic resin, polyvinyl acetate, etc. Glyceryl triacetate has good gelling effect and physiological inertness, and is widely used as a plasticizing and curing agent for cellulose acetate in cigarette filters, food additives, cosmetic fixatives and lubricating bases. Glyceryl triacetate is widely used in tobacco, food and metallurgical industries as a safe and no...

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 Patents(China)
IPC IPC(8): C07C69/18C07C67/08C07C67/52
Inventor 罗伟
Owner 湖南先伟阳光生物科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com