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Catalyst for preparing ethylene carbonate from ethylene oxide and carbon dioxide, and preparation method thereof

A technology of ethylene carbonate and ethylene oxide, which is applied in the field of catalysts, can solve the problems of low activity of heterogeneous catalysts, and achieve the effect of improving catalytic activity

Active Publication Date: 2016-01-06
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 the 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 for preparing ethylene carbonate from ethylene oxide and carbon dioxide, and preparation method thereof
  • Catalyst for preparing ethylene carbonate from ethylene oxide and carbon dioxide, and preparation method thereof
  • Catalyst for preparing ethylene carbonate from ethylene oxide and carbon dioxide, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 12.1gCu(NO 3 ) 2 ·3H 2 O and 44.2gAl(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 prepared by the above [Example 1] and 0.25g tetra-n-butylammonium bromide and place it in a 100mL stainless steel reactor, and 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 , keep system pressure 5.0MPa, cool after reacting for 4 hours, carry out chromatographic analysis to reaction product, obtain the conversion rate of ethylene oxide 95.7%, the selectivity of ethylene carbonate is 99.1%.

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Abstract

The invention relates to a catalyst for preparing ethylene carbonate from ethylene oxide and carbon dioxide, and a preparation method thereof to mainly solve the problem of low activity of heterogeneous catalysts in the prior art. The catalyst comprises a main catalyst and a cocatalyst; 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, and B is selected from at least one of Al, Fe, Cr or Zr; the cocatalyst is a quaternary ammonium salt R1R2R3R4N<+>X<->; and a weight ratio of the cocatalyst to the main catalyst is 0.1-10. The catalyst adopting the above technical scheme well solves the problem, and can be used in 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 Applications(China)
IPC IPC(8): B01J31/28B01J31/34B01J31/26B01J31/38C07D317/38
Inventor 陈梁锋杨为民何文军
Owner CHINA PETROLEUM & CHEM CORP
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