Process for the preparation of ethylene carbonate

A technology of ethylene carbonate and ethylene oxide, applied in chemical instruments and methods, organic chemistry, molecular sieve catalysts, etc., can solve the problem of low activity of heterogeneous catalysts, achieve stable properties, good technical effects, and solve low activity Effect

Active Publication Date: 2020-01-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem of low activity of heterogeneous catalysts in the prior art, and a new method for preparing ethylene carbonate is provided

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] Preparation of aluminum phosphate aluminum oxide APO: Dissolve 58.8g aluminum nitrate and 22.3g diammonium hydrogen phosphate in 500ml deionized water at room temperature, stir for 1 hour, add 10ml concentrated nitric acid for acidification, continue to drop concentrated ammonia water to adjust the pH value to 8 , filter the formed precipitate, wash with deionized water for 3 times, dry at 120°C overnight, and then dry and roast at 500°C to obtain phosphorus aluminum oxide APO-1, determined by ICP-AES, the content of Al in APO-1 Take Al 2 o 3 Calculated as 40%, the content of P is P 2 o 5 Count as 60%.

Embodiment 2

[0020] The preparation steps of aluminophosphate APO are the same as in [Example 1], except that the amounts of aluminum nitrate and diammonium hydrogen phosphate used are respectively 14.7g and 33.5g to obtain aluminophosphate APO-2, which is determined by ICP-AES. The content of Al in -2 is expressed as Al 2 o 3 Calculated as 10%, the content of P is P 2 o 5 Count as 90%.

Embodiment 3

[0022] The preparation steps of aluminophosphate APO are the same as in [Example 1], except that the amounts of aluminum nitrate and diammonium hydrogen phosphate used are respectively 36.8g and 27.9g to obtain aluminophosphate APO-3, which is determined by ICP-AES. The content of Al in -3 is expressed as Al 2 o 3 Calculated as 25%, the content of P is P 2 o 5 Count as 75%.

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Abstract

The invention relates to a method for preparing ethylene carbonate and mainly solves the problem of low activity of heterogeneous catalysts in the prior art. The method comprises the step of contacting ethylene oxide and carbon dioxide with a catalyst under reaction conditions; the catalyst contains 5wt%-40wt% of alkaline-earth metal based on MO and 60wt%-95wt% of a phosphorus aluminum oxide carrier APO. With adoption of the technical scheme, the problems are better solved, and the method can be used for preparation of ethylene carbonate from ethylene oxide and carbon dioxide in industrial production.

Description

technical field [0001] The present invention relates to a kind of method for preparing vinyl acid ester, especially a kind of method for preparing ethylene carbonate with ethylene oxide and carbon dioxide. Background technique [0002] Ethylene carbonate is an excellent solvent and fine chemical intermediate, and a potential basic raw material for organic chemical industry. At the same time, CO 2 Is a greenhouse gas, how to effectively fix has become one of the most challenging issues in this century. And through ethylene oxide and CO 2 Reactive synthesis of ethylene carbonate is one of the good fixation methods. With the recent increasing attention to the co-production of dimethyl carbonate and ethylene glycol using ethylene carbonate as a raw material, the fixation of CO by cyclic carbonate 2 approach has also received increasing attention. [0003] The heterogeneous catalysts reported so far for the production of cyclic carbonates include MgO, MgO / Al 2 o 3 And Cs / K...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/38B01J29/83
CPCB01J29/83B01J2229/18C07D317/38
Inventor 陈梁锋何文军
Owner CHINA PETROLEUM & CHEM CORP
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