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Process for preparing ethylene carbonate

A technology of ethylene carbonate and alkyl silicate, applied in the field of preparing ethylene carbonate, can solve the problems of easy loss of active components and low catalyst activity, and achieve the effects of simple separation and high activity

Active Publication Date: 2018-04-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the prior art has the problems of low catalyst activity and easy loss of active components, and a new method for preparing ethylene carbonate is provided

Method used

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  • Process for preparing ethylene carbonate
  • Process for preparing ethylene carbonate
  • Process for preparing ethylene carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Magnetic Fe 3 o 4 Preparation of nanoparticles: 14.12g Fe(acac) 3 Dissolve in a mixed solution composed of 200mL oleylamine and 200mL dibenzyl ether, treat the solution at 110°C for 1 hour under the protection of nitrogen, then continue to treat it at 300°C for 2 hours under the protection of nitrogen, add 100mL of ethanol, and centrifuge to obtain The solid was washed 3 times with 100 mL of acetone, and the obtained solid was dried in a vacuum oven to obtain magnetic Fe 3 o 4 The nanoparticle A1 was characterized by a transmission electron microscope, and it was found that the average particle size of the nanoparticle was 9.5 nm.

[0021] Magnetic Fe 3 o 4 Modification of nanoparticles: 10.0 g of magnetic Fe 3 o 4 Nanoparticles A1 were placed in a 500mL three-necked bottle, and then 200mL of anhydrous toluene and 4.0g of 3-aminopropyltriethoxysilane (3-aminopropyltriethoxysilane, APTES, structural formula C 3 h 8 NSi(OC 2 h 5 ) 3 ), refluxed for 48 hours, f...

Embodiment 2

[0024] Magnetic Fe 3 o 4 Preparation of nanoparticles: 14.12g Fe(acac) 3Dissolve in a mixed solution composed of 400mL oleylamine and 50mL dibenzyl ether, treat the solution at 80°C under nitrogen protection for 5 hours, then continue to treat it at 350°C under nitrogen protection for 4 hours, add 100mL of ethanol, and centrifuge to obtain The solid was washed 3 times with 100 mL of acetone, and the obtained solid was dried in a vacuum oven to obtain magnetic Fe 3 o 4 The nanoparticle A2 was characterized by a transmission electron microscope, and it was found that the average particle diameter of the nanoparticle was 5.9 nm.

[0025] Magnetic Fe 3 o 4 Modification of nanoparticles: 10.0 g of magnetic Fe 3 o 4 Nanoparticles A2 were placed in a 500mL three-necked flask, and then 200mL of anhydrous toluene and 0.5g of 3-aminopropyltriethoxysilane (3-aminopropyltriethoxysilane, APTES, structural formula C 3 h 8 NSi(OC 2 h 5 ) 3 ), filtered after reflux for 6 hours, wa...

Embodiment 3

[0028] With the magnetic Fe that [embodiment 2] makes 3 o 4 Nanoparticle A2 carries out modification and the loading of metal salt with the method described in [Example 1], obtains carrier B3 catalyst C3, after weighing, find that the APTES weight on the carrier B3 is the same as that of magnetic Fe 3 o 4 The weight ratio of nanoparticles A2 is 0.122, the metal salt ZnCl on the catalyst C3 2 The content is 22.1%, and the rest is carrier.

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Abstract

The invention relates to a method for preparing ethylene carbonate, and mainly solves the problems that a catalyst has low activities and an active ingredient is prone to lose in the prior art. In the invention ethylene oxide and carbon dioxides serve as materials and contact a catalyst to prepare ethylene carbonate, wherein the reaction pressure is 0.1-10.0 MPa, the reaction temperature is 60-200 DEG C, the weight proportion of the catalyst to the ethylene oxide ranges from 0.001 to 1. The catalyst comprises the following ingredients by weight percentage: a) 0.2-30% of metal salts, wherein the metal cations are Zn<2+>, Fe<3+>, Co<2+>, Ni<2+> or Cu<2+>, and the metal anions are SO<4><2->, HCO<3><2->, NO<3><->, Cl<->, Br<-> or I<-> ; and b) 70-99.8% of carriers, wherein the carriers are magnetic nano Fe<3>O<4> particles modified by alkyl siclicate including hetero atoms N or S. The method can solve the problem and can be used in ethylene carbonate production.

Description

technical field [0001] The present invention relates to a method for preparing ethylene carbonate. 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] Most of the methods for the production of cyclic carbonates reported at present are binary homogeneous catalysts using Lewis acid metal compounds and Lewis bases, wherein the Lewis acid metal compounds used include alkali (ear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/38B01J31/28B01J31/30
CPCB01J31/28B01J31/30C07D317/38
Inventor 陈梁锋杨为民何文军
Owner CHINA PETROLEUM & CHEM CORP