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Catalyst for glycerol carbonate, synthesis method and application of glycerol carbonate

A technology of glycerol carbonate and a synthesis method, applied in the field of glycerol carbonate, can solve the problems of difficult recovery of catalysts, poor reusability, etc., to maintain environmental friendliness, improve compatibility and interaction strength, excellent catalytic activity and The effect of reusing performance

Pending Publication Date: 2022-03-15
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The first object of the present invention is to provide a catalyst for glycerol carbonate by introducing alkali / alkaline earth metal oxides into TiO 2 The crystal lattice structure obtained a perovskite titanate catalyst with both high activity and high stability, which can solve the current technology of difficult catalyst recovery and poor reusability in the process of synthesizing glycerol carbonate by transesterification question

Method used

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  • Catalyst for glycerol carbonate, synthesis method and application of glycerol carbonate
  • Catalyst for glycerol carbonate, synthesis method and application of glycerol carbonate
  • Catalyst for glycerol carbonate, synthesis method and application of glycerol carbonate

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preparation example Construction

[0042] The preparation method of above-mentioned catalyst, described preparation method is citric acid complexation method.

[0043] Preferably, the steps of the citric acid complexation method are: mix the solution 1 and the solution 2 uniformly, evaporate to form a yellow gel, and roast to obtain the catalyst;

[0044] Wherein, the solution 1 is: adding titanate into absolute ethanol, and mixing evenly to obtain solution 1;

[0045] The solution 2 is: dissolve alkali / alkaline earth metal salt, citric acid and glacial acetic acid in water, and stir evenly to obtain the solution 2.

[0046] Further preferably, the molar ratio of the alkali / alkaline earth metal salt, citric acid and glacial acetic acid is 1:4:1;

[0047] The evaporation temperature is 60-100°C;

[0048] The calcination temperature is 500-1200°C, and the time is 1-10h;

[0049] The alkali / alkaline earth metal salt is NaNO 3 、KNO 3 , CsNO 3, Mg(NO 3 ), Ca(NO 3 ) 2 、CH 3 COONa, CH 3 COOK, CH 3 COCs, Ca...

Embodiment 1

[0063] The specific operation steps are as follows:

[0064] (1) Preparation of catalyst:

[0065] Add titanate to absolute ethanol to form a homogeneous solution 1, dissolve alkali / alkaline earth metal salts, citric acid and glacial acetic acid with a molar ratio of 1:4:1 in water and stir evenly to obtain solution 2, and dissolve under rapid stirring Solutions 1 and 2 were mixed and stirred rapidly to form a homogeneous mixed solution. Evaporate at 60-100° C. until a yellow gel is formed, and roast the yellow gel at 500-1200° C. for 1-10 hours to obtain a perovskite-type titanate catalyst.

[0066] Among them, the general formula of perovskite titanate is A 2 TiO 3 , BTiO 3 and A 2-2x B x TiO 3 (0≤x≤1), wherein A is one of Na, K and Cs, and B is one of Mg and Ca.

[0067] Alkaline / alkaline earth metal salts as NaNO 3 、KNO 3 , CsNO 3 , Mg(NO 3 ), Ca(NO 3 ) 2 、CH 3 COONa, CH 3 COOK, CH 3 COOCs, Ca(CH 3 COO) 2 and Mg(CH 3 COO) 2 at least one of the

[0068...

Embodiment 2

[0077] Add 6.81g of tetrabutyl titanate to absolute ethanol to form a uniform solution 1, dissolve calcium nitrate, citric acid and glacial acetic acid in a molar ratio of 1:4:1 in water and stir to obtain a uniform solution 2. Under rapid stirring, the solution 1 and the solution 2 were mixed and stirred to form a uniform mixed solution, and the molar ratio of titanium and calcium in the mixed solution was 1:1. Evaporate at 80°C to form a yellow gel, then bake the yellow gel at 700°C for 3.0h to obtain CaTiO 3 catalyst.

[0078] Put glycerol and dimethyl carbonate at a molar ratio of 1:2 into the reactor, and then add CaTiO 3 Catalyst, the mass of the catalyst is 3wt% of the mass of glycerin, and the product glycerol carbonate can be obtained by reflux reaction at 80° C. for 2 hours.

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Abstract

The invention relates to a catalyst for glycerol carbonate, a synthesis method and application of glycerol carbonate. The catalyst for glycerol carbonate is perovskite type titanate, and the general formula of the catalyst is A2TiO3, BTiO3 or A2-2xBxTiO3 (x is more than or equal to 0 and less than or equal to 1), wherein A is one of Na, K and Cs, and B is one of Mg and Ca. The invention also discloses a synthesis method for glycerol carbonate and application of glycerol carbonate. In the technical scheme of the invention, the catalyst has the advantages of high activity and high stability, and new application of glycerol carbonate is provided for plasticizing fully biodegradable polymers PLA and PGA.

Description

technical field [0001] The invention belongs to the technical field of glycerol carbonate, and in particular relates to a catalyst for glycerol carbonate, a synthesis method and an application of glycerol carbonate. Background technique [0002] As a class of bio-based specialty chemicals, glycerol carbonate (GC) has the characteristics of high boiling point, environmental protection, non-toxicity and degradability, and has been widely used in the fields of organic synthesis, environmental protection and material science. Currently, GC can use urea, CO 2 , CO or organic carbonates are obtained by reacting carbonylating reagents with glycerol. Among them, the process of synthesizing GC with organic carbonate and glycerol through transesterification reaction has the advantages of simple process, environmental protection and high yield, so it has attracted extensive attention. [0003] At present, industrial synthetic GC mainly uses Na 2 CO 3 , NaOH and sodium methoxide as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/02B01J23/04C07D317/36C07D317/38C08K5/109C08L67/04
CPCB01J23/02B01J23/04C07D317/36C07D317/38C08K5/109C08L67/04
Inventor 王自庆朱建宇王培贤魏忠李红力
Owner SHIHEZI UNIVERSITY
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