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Catalyst for synthesizing aliphatic carbonic ester, preparation method and application thereof

A technology of aliphatic carbonate and catalyst, which is applied in the field of catalyst for synthesizing aliphatic carbonate and its preparation, can solve the problems of low activity of heterogeneous catalyst, difficulty in separation of product and catalyst, poor stability, etc., and achieve easy scale-up preparation, Wide application range and easy separation effect

Active Publication Date: 2021-10-19
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a catalyst for the synthesis of aliphatic carbonates, mainly used in the reaction of cyclic carbonates to generate aliphatic carbonates through transesterification, to solve the current homogeneous catalytic system product and catalyst separation difficulties, and The problems of low activity and poor stability of heterogeneous catalysts

Method used

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  • Catalyst for synthesizing aliphatic carbonic ester, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 72.7g Zn(NO 3 ) 2 .6H 2 O and 37.5g Al(NO 3 ) 3 .9H 2 O was dissolved in 438ml deionized water to obtain salt solution A; 14.5g Zn(NO 3 ) 2 .6H 2 O was dissolved in 83ml deionized water to obtain salt solution B; 44.9g KOH and 27.6g K 2 CO 3 Dissolve in 615ml of deionized water to obtain alkaline solution C; add 0.60g of graphene oxide to 200ml of deionized water, and ultrasonicate for 20min to obtain slurry D; dissolve 0.78g of NaOH in 150ml of CO 2 Solution E was obtained in deionized water.

[0037] The above-mentioned salt solution A and alkaline solution C are co-precipitated in the slurry D at 30°C, pH 10.5, and stirring speed 300r / min. After the precipitation is completed, the precipitated slurry is dynamically refluxed and aged at 80°C for 12 hours Slurry F was obtained. Filter the slurry F, then add deionized water twice the mass of the filter cake to the filter cake, fully beat the filter cake, and obtain the slurry G. Salt solution B and alkaline ...

Embodiment 2

[0040] 89.7g Mg(NO 3 ) 2 .6H 2 O and 40.3g Fe(NO 3 ) 3 .9H 2 O was dissolved in 375ml deionized water to obtain salt solution A; 38.5g Mg(NO 3 ) 2 .6H 2 O was dissolved in 100ml deionized water to obtain salt solution B; 67.3g KOH and 41.5g K 2 CO 3 Dissolve in 800ml deionized water to obtain alkaline solution C; add 1.48g graphite oxide to 370ml deionized water and ultrasonicate for 30min to obtain slurry D; dissolve 1.06g KOH in 118ml deCO 2 Solution E was obtained in deionized water.

[0041] The above-mentioned salt solution A and alkaline solution C are co-precipitated in the slurry D at 40°C, pH 10.0, and the stirring speed is 600r / min. After the precipitation is completed, the precipitated slurry is dynamically refluxed and aged at 85°C for 12 hours Slurry F was obtained. Filter the slurry F, then add deionized water 5 times the mass of the filter cake to the filter cake, fully beat the filter cake, and obtain the slurry G. Salt solution B and alkaline solut...

Embodiment 3

[0044] 51.3g Mg(NO 3 ) 2 .6H 2 O and 37.5g Al(NO 3 ) 3 .9H 2 O was dissolved in 600ml deionized water to obtain salt solution A; 112g Al(NO 3 ) 3 .9H 2 O was dissolved in 200ml deionized water to obtain salt solution B; 67.3g KOH and 41.5g K 2 CO 3 Dissolve in 900ml deionized water to obtain alkaline solution C; add 0.29g graphite oxide to 287ml deionized water, and ultrasonicate for 30min to obtain slurry D; 2.46g K 2 CO 3 Dissolve in 229ml deCO 2 Solution E was obtained in deionized water.

[0045]The above-mentioned salt solution A and alkaline solution C are co-precipitated in the slurry D at 40°C, pH 11.0, and stirring speed 800r / min. After the precipitation is completed, the precipitated slurry is dynamically refluxed and aged at 60°C for 24 hours Slurry F was obtained. Filter the slurry F, then add deionized water 3 times the mass of the filter cake to the filter cake, fully beat the filter cake, and obtain the slurry G. Salt solution B and alkaline soluti...

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Abstract

The invention provides a catalyst for synthesizing aliphatic carbonic ester, a preparation method and application thereof, wherein the catalyst is composed of M1M2OxCy-M3Oz, the molar ratio of M1 to M2 is (0.5-10):1, the mass percentage content of Cy in M1M2OxCy is 1.0-5.0%, and the mass ratio of M3Oz to M1M2OxCy is (1.0-5.0):100. The catalyst disclosed by the invention can catalyze cyclic carbonate (such as ethylene carbonate and propylene carbonate) and alcohol (such as methanol and ethanol) to generate aliphatic carbonate through transesterification. The catalyst has adjustable alkalinity, can realize transesterification of cyclic carbonate and different alcohols as required, and has the advantages of wide application range, simple preparation process, low production cost and easiness in large-scale preparation.

Description

technical field [0001] The invention relates to the field of heterogeneous catalysis, in particular to a catalyst for synthesizing aliphatic carbonate, its preparation method and application. Background technique [0002] Aliphatic carbonates, such as dimethyl carbonate and diethyl carbonate, are important chemical raw materials with a wide range of uses. For example, dimethyl carbonate is widely used in many fields such as pesticides, medicines, dyes, fine chemicals, and electronics industries, and is known as a "green" chemical product and a "new building block" for chemical synthesis. Diethyl carbonate is one of the key solvents required by the battery electrolyte, accounting for about 10-15% of the solvent used in the electrolyte, and has a good market prospect. At present, the synthesis methods of aliphatic carbonate mainly include phosgene method, alcohol liquid phase oxidative carbonylation method, alcohol gas phase oxidative carbonylation method, urea alcoholysis me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J23/745B01J23/10B01J23/04B01J21/18C07D317/38C07D317/36
CPCB01J23/06B01J23/78B01J23/10B01J23/04B01J21/18C07D317/38C07D317/36
Inventor 李德宝郭荷芹陈从标贾丽涛侯博
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI