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Method using cerium and zirconium oxide/molecular sieve to catalyze and synthesize diethyl carbonate

A technology of cerium zirconium oxide and diethyl carbonate, which is applied in the direction of molecular sieve catalyst, metal/metal oxide/metal hydroxide catalyst, carbon dioxide or inorganic carbonate preparation, etc., which can solve catalyst poisoning and low recycling rate , high cost issues

Inactive Publication Date: 2018-10-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the oxidative carbonylation method has high atom economy, the catalyst used is a noble metal, which requires a large amount and high cost. The catalyst is poisoned after being decomposed by water, and the recycling rate is low.

Method used

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  • Method using cerium and zirconium oxide/molecular sieve to catalyze and synthesize diethyl carbonate
  • Method using cerium and zirconium oxide/molecular sieve to catalyze and synthesize diethyl carbonate
  • Method using cerium and zirconium oxide/molecular sieve to catalyze and synthesize diethyl carbonate

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Weigh 4.8196gZrOl 2 ·8H 2 O, dissolve it completely with 50ml deionized water to make a mixed solution. NH with deionized water 3 ·H 2 O was diluted at a volume ratio of 1:1 as a precipitant. In a 100ml three-necked flask, the mixed solution and the precipitating agent are precipitated by the method of forward dropwise addition: under the continuous stirring of the magnetic stirrer at 60°C, ammonia water is added dropwise to the mixed solution, and the pH value is controlled by a pH meter. 9.5±0.1, after the precipitation is completed, reflux at 120°C for 6 hours for aging, take out the mixed solution after reflux, and wash the precipitate repeatedly with deionized water under the condition of vacuum filtration pump decompression and suction, until the AgNO 3 No Cl was detected in the filtrate - Until then, take out the filter cake, dry it in an oven at 100°C for 2h, grind it thoroughly, and then bake it in a muffle furnace at 600°C for 1h to obtain ZrO 2 Finished...

Embodiment 2

[0028] Weigh 0.4342gCe(NO 3 ) 3 ·6H2 O and 2.9003gZrOl 2 ·8H 2 O, dissolve it completely with 50ml deionized water to make a mixed solution. NH with deionized water 3 ·H 2 O was diluted at a volume ratio of 1:1 as a precipitant. In a 100ml three-necked flask, the mixed solution and the precipitating agent are precipitated by the method of forward dropwise addition: under the continuous stirring of the magnetic stirrer at 60°C, ammonia water is added dropwise to the mixed solution, and the pH value is controlled by a pH meter. 9.5±0.1, after the precipitation is completed, reflux at 100°C for 6 hours for aging, take out the mixed solution after reflux, and wash the precipitate repeatedly with deionized water under the condition of vacuum filtration pump decompression and suction, until the AgNO 3 No Cl was detected in the filtrate - The filter cake was taken out, dried in an oven at 100°C for 2h, fully ground, and then roasted in a muffle furnace at 800°C for 5h to obtai...

Embodiment 3

[0030] Weigh 0.8685gCe(NO 3 ) 3 ·6H 2 O and 2.578g ZrOl 2 ·8H 2 O, dissolve it completely with 67ml deionized water to make a mixed solution. NH with deionized water 3 ·H 2 O was diluted at a volume ratio of 1:1 as a precipitant. In a 100ml three-necked flask, the mixed solution and the precipitating agent are precipitated by the method of forward dropwise addition: under the continuous stirring of the magnetic stirrer at 60°C, ammonia water is added dropwise to the mixed solution, and the pH value is controlled by a pH meter. 9.5±0.1, after the precipitation is completed, reflux at 100°C for 6 hours for aging, take out the mixed solution after reflux, and wash the precipitate repeatedly with deionized water under the condition of vacuum filtration pump decompression and suction, until the AgNO 3 No Cl was detected in the filtrate - The filter cake was taken out, dried in an oven at 100°C for 2h, fully ground, and then roasted in a muffle furnace at 800°C for 5h to obt...

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Abstract

The invention discloses a method using cerium and zirconium oxide / molecular sieve to catalyze and synthesize diethyl carbonate. The method comprises the following steps of under the carbon dioxide atmosphere, adding a certain amount of anhydrous ethyl alcohol into a reaction kettle loaded with a cerium and zirconium oxide and 3A molecular sieve mixture with certain ratio, catalyzing and synthesizing, and finally obtaining a main product, namely a mixture of the diethyl carbonate, wherein the reaction atmosphere of the synthesis reaction is carbon dioxide, the reaction pressure is 10MPa or so,the reaction temperature is 140 to 190 DEG C, the reaction time is 2 to 4h, and the rotation speed of the reaction kettle is 300 to 700r / min. The substances of the product synthesized by the chemicalmethod are complicated, which is not suitable for the separating of the required diethyl carbonate. The composite catalyst has the advantages that the diethyl carbonate is synthesized in a target way;the types of produced substances are fewer; the catalyzing activity, raw material conversion rate and repeated utilization rate are high, and the application prospect is broad.

Description

technical field [0001] The invention relates to the field of preparation methods for high-altitude bio-based diesel oil additives, in particular to a method for synthesizing diethyl carbonate by catalysis of cerium-zirconium oxide / molecular sieve. Background technique [0002] The ecological environment in high-altitude areas is fragile, and has the characteristics of high altitude, low air pressure, thin air, low oxygen content, large temperature difference between day and night, and harsh weather conditions. When the armor is operating in the plateau area, affected by the environment and climate conditions, the intake air volume is reduced, the excess air coefficient is reduced, and the oxygen supply is insufficient during the combustion process. The armored vehicles generally have power, low economy, poor ignition performance, and black smoke. , serious engine power drop and other issues. With the continuous improvement of armor combat effectiveness and maneuverability r...

Claims

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Application Information

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IPC IPC(8): C07C68/04C07C69/96B01J29/70B01J37/03B01J37/08
CPCB01J23/002B01J29/7053B01J37/031B01J37/088C07C68/04C07C69/96Y02P20/141
Inventor 张栩刘娇谭天伟
Owner BEIJING UNIV OF CHEM TECH