Preparation process and device for glycerol triacetate

A technology for the preparation of glycerol triacetate, which is applied to the preparation of carboxylic acid esters, the preparation of organic compounds, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problems of large environmental pollution and strong corrosion of equipment , to achieve high catalytic activity, lower reaction temperature and good reusability

Active Publication Date: 2014-08-06
JIANGSU RUICHEN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that liquid acid is used, which is highly corrosive to equipment and causes great environmental pollution.

Method used

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  • Preparation process and device for glycerol triacetate
  • Preparation process and device for glycerol triacetate
  • Preparation process and device for glycerol triacetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Heat glycerin, acetic acid, and water-containing agent to 125°C~135°C, then put the materials into the batching tank at a rate of 300 Kg / h of glycerin, 1000 Kg / h of acetic acid, and 100 Kg / h of water-containing agent, mix well and then circulate The pump is continuously pumped into the fixed bed reactor loaded with 200 Kg of nitrate intercalated magnesium aluminum hydrotalcite catalyst to carry out the esterification reaction; the temperature of the fixed bed reactor is controlled between 130°C and 135°C, and the pressure is controlled at 0.28MPa; The residence time of the material in the fixed-bed reactor is controlled at 24 hours. The material after the esterification reaction enters the dehydration tower for distillation and dehydration. The temperature at the top of the dehydration tower is controlled at 86°C. The raw material is sent to the acylation kettle for acylation reaction at 160°C~180°C, the time is controlled within 1~2h, after the acylation is completed, i...

Embodiment 2

[0045] Heat glycerin, acetic acid, and water-carrying agent through two pipelines to 125°C~135°C, and then put the materials into the batching tank at a rate of 300KG / h glycerin, 1000KG / h acetic acid, and 100KG / h water-carrying agent, mix them evenly and pass through The circulating pump is continuously pumped into the fixed-bed reactor loaded with nitrate-intercalated magnesium-aluminum hydrotalcite catalyst for esterification reaction; the temperature of the fixed-bed reactor is controlled between 120°C and 130°C, and the pressure is controlled at 0.20MPa; The residence time in the fixed-bed reactor is controlled at 20 hours. The material after the esterification reaction enters the dehydration tower for distillation and dehydration. The temperature at the top of the dehydration tower is controlled at 80°C. It is sent to the acylation tank for acylation operation, after the acylation is completed, it is subjected to deacidification, dehydration and other refining processes, a...

Embodiment 3

[0048] Heat glycerin, acetic acid, and water-carrying agent through two pipelines to 125°C~135°C, then put the materials into the batching tank at a rate of 300KG / h glycerin, 900KG / h acetic acid, and 100KG / h water-carrying agent, mix them evenly and pass through The circulating pump is continuously injected into the fixed-bed reactor loaded with multi-acid intercalated hydrotalcite catalyst for esterification reaction; the temperature of the fixed-bed reactor is controlled between 120°C and 130°C, and the pressure is controlled at 0.20MPa; The residence time in the bed reactor is controlled at 20h. The material after the esterification reaction enters the dehydration tower for distillation and dehydration. The temperature at the top of the dehydration tower is controlled at 80°C. Put it into the acylation tank for acylation operation, after the acylation is completed, it will carry out deacidification, dehydration and other refining processes, and finally obtain the finished pr...

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Abstract

The invention discloses a continuous production technology and production device for producing environmental-friendly and non-toxic glycerol triacetate by catalyzing polyacid intercalated hydrotalcite. The current process of industrially producing the glycerol triacetate by mainly taking sulfuric acid, phosphoric acid and other inorganic liquid acid as catalysts through a batch still has the defects of environment pollution, unsafe production, low production efficiency and the like. According to the preparation process and device disclosed by the invention, green and high-efficiency polyacid intercalated catalysts are selected to replace the sulfuric acid and the phosphoric acid and a fixed bed process is selected for continuous production. The preparation method has the advantages of high catalytic activity as well as favorable selectivity, recycling property and environment friendliness; the production efficiency is greatly increased and the discharge of three wastes is reduced; a solid foundation is laid for green production of the glycerol triacetate and further industrial production practice application.

Description

technical field [0001] The invention relates to a preparation method of esters, in particular to a preparation process and device of glycerol triacetate. Background technique [0002] Glyceryl triacetate, also known as glyceryl triacetate, English name glyceryl triacetate; triacetate, is a safe, human-friendly non-toxic solvent. Its structural formula is as follows: [0003] [0004] Glyceryl triacetate is soluble in alcohol, ether, benzene, chloroform and castor oil, and can dissolve nitrocellulose, cellulose acetate, acrylic resin, polyvinyl acetate, etc. Its physical and chemical properties are shown in Table 1.1. [0005] Table 1.1 Physical and chemical properties of triacetin [0006] [0007] Glyceryl triacetate can be used as a non-toxic plasticizer and is easy to biodegrade. In some fields, it can replace the original toxic plasticizer DOP. It is used in PVC materials, PLA materials, and PVAc emulsions to achieve the effect of DOP. It is widely used It is...

Claims

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Application Information

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IPC IPC(8): C07C69/18C07C67/08B01J31/26
CPCB01J23/882B01J23/888B01J27/199C07C67/08C07C69/18
Inventor 陈祥张勇郭鹏程钱冬宋宇飞林彦军
Owner JIANGSU RUICHEN CHEM
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