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Catalyst and method for preparing ethylene carbonate from ethylene oxide and carbon dioxide

A technology of ethylene carbonate and ethylene oxide, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of low activity of heterogeneous catalysts , to achieve the effect of improving the catalytic activity

Active Publication Date: 2018-07-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that there is a problem of low activity of heterogeneous catalysts in the prior art, and a new catalyst for preparing ethylene carbonate from ethylene oxide and carbon dioxide is provided

Method used

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  • Catalyst and method for preparing ethylene carbonate from ethylene oxide and carbon dioxide
  • Catalyst and method for preparing ethylene carbonate from ethylene oxide and carbon dioxide
  • Catalyst and method for preparing ethylene carbonate from ethylene oxide and carbon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Weigh 12.1 g Cu(NO 3 ) 2 ·3H 2 O and 44.2 g Al(NO 3 ) 3 9H 2 O was dissolved in 300 mL of water, and 200 mL of an aqueous solution containing 25.2 g of anhydrous sodium carbonate was added thereto, the resulting precipitate was collected, washed with deionized water 3 times, 500 mL each time, and the obtained precipitate was dried in an oven at 120 °C for 24 hours Afterwards, calcined at 500°C for 5 hours to obtain CuO / Al 2 o 3 Mixed oxide catalyst MO-1, in which CuO and Al 2 o 3 The parts by weight are respectively 40 and 60.

Embodiment 2～23

[0039] The mixed metal oxide catalyst obtained is shown in Table 1 by changing the type and amount of mixed metal salts and precipitants used, and keeping the rest of the conditions unchanged.

[0040] Table 1

[0041]

[0042]

Embodiment 24

[0044] Take by weighing 0.50g MO-1 catalyst and 0.25g methyltriphenylphosphonium iodide prepared above [Example 1] and place in a 100mL stainless steel reaction kettle, use N 2 Replace the air in the reactor, then fill with 50.0g ethylene oxide, pass into CO 2 , keep the system pressure at 1.0MPa, stir for 1 hour and then raise the temperature to 120°C, add CO 2 , keeping the system pressure at 5.0MPa, cooling after 4 hours of reaction, and performing chromatographic analysis on the reaction product, it was found that the conversion rate of ethylene oxide was 99.0%, and the selectivity of ethylene carbonate was 99.3%.

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PUM

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Abstract

The invention relates to a catalyst and a method for preparing ethylene carbonate from ethylene oxide and carbon dioxide, and mainly solves the problem of low activity of heterogeneous catalysts in the prior art. The present invention comprises a main catalyst and a cocatalyst by using the catalyst; the main catalyst is a metal mixed oxide AaOb / BcOd; wherein, A is selected from at least one of Cu, Mg, Zn, Ca, Co or Ni; B At least one selected from Al, Fe, Cr or Zr; the cocatalyst is a quaternary phosphonium salt R1R2R3R4P+X-; the technical scheme that the weight ratio of the cocatalyst to the main catalyst is 0.1 to 10 solves this problem well , can be used in the industrial production of ethylene carbonate.

Description

technical field [0001] The invention relates to a catalyst for preparing ethylene carbonate from ethylene oxide and carbon dioxide and a method thereof. 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 it 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 / KX etc., these catalysts all have the problem of low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/38B01J31/28B01J31/34B01J31/26
Inventor 陈梁锋杨为民何文军
Owner CHINA PETROLEUM & CHEM CORP
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