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Application of polyacid intercalated hydrotalcite catalyst in preparing glyceryl triacetate

A technology of glycerol triacetate and hydrotalcite, which is applied to the preparation of carboxylic acid esters, the preparation of organic compounds, and catalysts for physical/chemical processes, etc., to achieve the effects of high catalytic selectivity, guaranteed dispersion, and easy recycling and reuse

Active Publication Date: 2014-04-09
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the practical application of polyacid as a catalyst, there are often problems in the separation, recovery and recycling of powder agglomeration and the loading of polyacid.

Method used

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  • Application of polyacid intercalated hydrotalcite catalyst in preparing glyceryl triacetate
  • Application of polyacid intercalated hydrotalcite catalyst in preparing glyceryl triacetate
  • Application of polyacid intercalated hydrotalcite catalyst in preparing glyceryl triacetate

Examples

Experimental program
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Effect test

Embodiment 1

[0031] a) Take 15.4g (0.06mol) Mg(NO 3 ) 2 ·6H 2 O, 7.5g (0.02mol) Al(NO 3 ) 3 9H 2 O, 4.53g (0.053mol) NaNO 3 Mix, dissolve in 80ml to remove CO 2 A mixed salt solution was obtained in deionized water; 5.60g (0.133mol) NaOH was dissolved in 50ml to remove CO 2 Alkaline solution was obtained in deionized water; in N 2 Slowly drop the alkali solution into the mixed salt solution under protection, stir vigorously, and stop the drop when the pH is 6.0; then pour it into a high-pressure reaction kettle, age at 100°C for 18 hours, and then centrifugally wash to obtain a layer of hydrotalcite The divalent metal cation in is Mg 2+ , the trivalent metal cation is Al 3+ , the interlayer anion is NO 3 - , that is, magnesium aluminum hydrotalcite intercalated with nitrate, and the molar ratio of magnesium to aluminum is 3:1; the obtained undried 1g hydrotalcite is added to 65ml to remove CO 2 The hydrotalcite suspension was obtained in deionized water, and the hydrotalcite wa...

Embodiment 2

[0036] a) Take 15.4g (0.06mol) Mg(NO 3 ) 2 ·6H 2 O, 7.5g (0.02mol) Al(NO 3 ) 3 9H 2 O, 4.53g (0.053mol) NaNO 3 Mix, dissolve in 80ml to remove CO 2 A mixed salt solution was obtained in deionized water; 5.60g (0.133mol) NaOH was dissolved in 50ml to remove CO 2 Alkaline solution was obtained in deionized water; in N 2 Slowly drip the alkali solution into the mixed salt solution under protection, stir vigorously, and stop the dripping when the pH is 6.0; then pour it into a high-pressure reactor, age at 100°C for 18 hours, and then centrifuge and wash; the obtained 1g of hydrotalcite Add to 65ml to remove CO 2 The hydrotalcite suspension was obtained in deionized water, and the hydrotalcite was swelled for 5h; then 0.3M HNO 3 Adjust the pH to 6.0;

[0037] b) take 10gK 6 [SiW 11 CoO 39 ]·10H 2 O, dissolved in 50ml to remove CO 2 In deionized water, heat it to dissolve completely to obtain polyacid solution;

[0038] c) Drop the polyacid solution prepared in step...

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Abstract

The invention discloses a polyacid intercalated hydrotalcite catalyst and application of the polyacid intercalated hydrotalcite catalyst to preparation of environment-friendly toxic-free glyceryl triacetate, which belong to the technical field of catalyst preparation. Polyacid is intercalated into hydrotalcite through an ion exchanging method and firstly used for producing the glyceryl triacetate. The prepared polyacid intercalated hydrotalcite catalyst has a supermolecular lamella structure and a nano-grade size; the glyceryl triacetate is prepared through the catalysis of the polyacid intercalated hydrotalcite catalyst. Compared with concentrate sulfuric acid and phosphoric acid, the polyacid intercalated hydrotalcite catalyst has the advantages that the high-efficient catalytic activity and catalytic selectivity can be maintained under the situation that the reaction temperature is lowered; the corrosion on equipment is small, and no waste liquid with high acidity is produced; easiness in recycling can be realized, the stability is good, and after the catalyst is continuously used for 3 months, the poisoning phenomenon of the catalyst does not occur and the activity of the catalyst is not obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and particularly relates to the application of a class of multi-acid intercalation hydrotalcite catalysts in the catalytic production of environmentally friendly and non-toxic 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. 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. [0003] Table 1.1 Physical and chemical properties of triacetin [0004] [0005] As an important chemical raw material, triacetin has been widely used as a plasticizer and binder in food, cosmetics, medicine and dye industries. [0006] 1) Plasticizer industry [0007] Due t...

Claims

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Application Information

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IPC IPC(8): B01J31/26C07C69/18C07C67/08
Inventor 宋宇飞林彦军陈祥张勇郭鹏程钱冬
Owner BEIJING UNIV OF CHEM TECH
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