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Solid base catalyst for synthetizing carbonic acid glyceride by transesterification method, and preparation method and application thereof

A solid base catalyst, glycerol carbonate technology, applied in the preparation of organic carbonate, chemical recovery and other directions, can solve the problems of waste liquid polluting the environment, difficult separation of homogeneous catalysts, and heterogeneous catalysts hindering popularization and application, etc. The effect of easy product and mild reaction conditions

Inactive Publication Date: 2013-03-13
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still many problems in the disclosed catalyzer, such as homogeneous catalyst K 2 CO 3 , KOH, etc. are difficult to separate, waste liquid pollutes the environment, and the deactivation of heterogeneous catalysts also hinders its popularization and application to a large extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Accurately weigh 0.34g LiOH and 5.0g powdered γ-Al 2 o 3 , Dissolve LiOH in 4.5mL deionized water, stir and dissolve evenly, then impregnate into γ-Al 2 o 3 First, let the impregnation stand at room temperature for 4 hours to dry until it is half dry, then transfer it to an oven, dry it at 100°C for 12 hours, and finally put it into a muffle furnace, raise the temperature to 500°C in an air atmosphere, and keep it for 6 hours. Made Li 2 O / γ-Al 2 o 3 Catalyst, Li 2 The O content is 4% (wt).

[0025] Put 0.55g of the above catalyst, 54.0g of dimethyl carbonate and 18.4g of glycerin into a 250mL three-necked flask equipped with a thermometer, a condenser and a magnetic stirrer, heat with an oil bath, and heat up to 75°C under stirring conditions. Keep for 2h. Stop the reaction afterwards, filter after cooling down to room temperature, separate the catalyst, and distill the filtrate under reduced pressure at 50°C to obtain a colorless and transparent liquid product,...

Embodiment 2

[0027] Accurately weigh 0.34g LiOH and 5.0g powdered CeO 2 , Dissolve LiOH in 3.5mL deionized water, stir and dissolve evenly, then impregnate CeO 2 First, let the impregnation stand at room temperature for 6 hours to dry, then transfer it to an oven, dry it at 100°C for 12 hours, and finally put it into a muffle furnace, raise the temperature to 500°C in an air atmosphere, and keep it for 3 hours. Made Li 2 O / CeO 2 Catalyst, Li 2 The O content is 4% (wt).

[0028] Put 0.55g of the above catalyst, 54.0g of dimethyl carbonate and 18.4g of glycerin into a 250mL three-necked flask equipped with a thermometer, a condenser and a magnetic stirrer, heat with an oil bath, and heat up to 75°C under stirring conditions. Keep for 1.5h. Stop the reaction afterwards, filter after cooling down to room temperature, separate the catalyst, and distill the filtrate under reduced pressure at 50°C to obtain a colorless and transparent liquid product, which is subjected to chromatographic ana...

Embodiment 3

[0030] Accurately weigh 0.34g LiOH and 5.0g powdered ZrO 2 , Dissolve LiOH in 3.0mL deionized water, stir and dissolve evenly, then impregnate ZrO 2 First, let the impregnation stand at room temperature for 6 hours to dry, then transfer it to an oven, dry it at 120°C for 12 hours, and finally put it into a muffle furnace, raise the temperature to 500°C in an air atmosphere, and keep it for 4 hours. Made Li 2 O / ZrO 2 Catalyst, Li 2 The O content is 4% (wt).

[0031] Put 0.55g of the above catalyst, 54.0g of dimethyl carbonate and 18.4g of glycerin into a 250mL three-necked flask equipped with a thermometer, a condenser and a magnetic stirrer, heat with an oil bath, and heat up to 75°C under stirring conditions. Keep for 1.5h. Stop the reaction afterwards, filter after cooling down to room temperature, separate the catalyst, and distill the filtrate under reduced pressure at 50°C to obtain a colorless and transparent liquid product, which is subjected to chromatographic ana...

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PUM

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Abstract

The invention discloses a solid base catalyst for synthetizing carbonic acid glyceride by a transesterification method. The solid base catalyst is a supported solid catalyst formed by an R2O / MexOy molecule, wherein R is an alkali metal element; MexOy is a metallic oxide carrier; O is an oxygen element; x and y are quantities of metal and oxygen atoms in the metallic oxide carrier molecule, and the content of alkali metal oxide in the catalyst is 0.1-15wt%. The solid base catalyst has the advantages that the solid base catalyst is easy to prepare; the product and the catalyst are simply separated; the catalyst can be recycled; and the carbonic acid glyceride is high in productivity, and the environment is not polluted.

Description

technical field [0001] The invention belongs to a catalyst, a preparation method and an application, in particular to a catalyst, a preparation method and an application for preparing glycerol carbonate by reacting glycerin and dimethyl carbonate. Background technique [0002] With the development of biodiesel, the surplus of glycerin is becoming more and more serious, and the development and utilization of downstream products have aroused widespread concern. Among many downstream products of glycerin, glycerol carbonate (GC) occupies a very important position. GC molecules contain hydroxyl groups, ester groups, carbonyl groups and carbonate groups, and can be used in cosmetic wetting agents, pharmaceutical solvents, polyesters or polyurethanes, etc. , is a high value-added glycerol derivative【Liu Xuemin, Chu Zhaoning, Liu Zhiwei, Progress in Chemical Industry, 2009, 28(8):1445-1448]. [0003] There are many routes to prepare GC from glycerol, such as phosgene method, urea ...

Claims

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Application Information

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IPC IPC(8): B01J23/04B01J23/10C07C69/96C07C68/06
CPCY02P20/584
Inventor 王军威亢茂青刘振民殷宁李其峰王心葵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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