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Method for synthesizing ethylene carbonate or propylene carbonate with carbon dioxide and ethylene oxide or propylene oxide

A technology of carbon dioxide and ethylene oxide, applied in the field of carbon dioxide and ethylene oxide or propane to synthesize ethyl carbonate or propylene, can solve problems such as catalyst loss, and achieve the effects of small catalyst loss, simple reaction process and high catalyst activity

Active Publication Date: 2010-09-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the prior art, all are batch operations, there is the problem of separating the catalyst from the product using a homogeneous catalyst to synthesize ethylene (propylene) carbonate, so that the catalyst is lost

Method used

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  • Method for synthesizing ethylene carbonate or propylene carbonate with carbon dioxide and ethylene oxide or propylene oxide
  • Method for synthesizing ethylene carbonate or propylene carbonate with carbon dioxide and ethylene oxide or propylene oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The 1-methyl-3-butyl imidazolium bromide salt of 1g / h sodium carbonate and 6.5g / h joins in the tubular reactor, and the carbon dioxide of the ethylene oxide of 150g / h and 2.0MPa respectively from reactor Add at the bottom and heat to 100°C with an external heating medium to make ethylene oxide react with carbon dioxide for a residence time of 5 hours to convert to ethylene carbonate; product analysis shows that the conversion rate of ethylene oxide is 98%; the selectivity is 99%.

Embodiment 2

[0026] The 1-methyl-3-butylimidazolium tetrafluoroborate of 1g / h potassium carbonate and 6.5g / h joins in the tubular reactor, and reaction condition is identical with embodiment 1, and oxirane and carbon dioxide reaction stay Time 3 hours into ethylene carbonate; product analysis, calculated ethylene oxide conversion rate of 99%; selectivity of 99%.

Embodiment 3

[0028] Using the catalyst in Example 1, 150g / h of propylene oxide and 3.5MPa of carbon dioxide were added from the bottom of the reactor respectively, heated to 120°C with an external heating medium, and the residence time of ethylene oxide and carbon dioxide was converted for 3 hours. into propylene carbonate; product analysis, calculated conversion rate of propylene oxide was 98%; selectivity was 98%.

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Abstract

The invention relates to a method for synthesizing ethylene carbonate or propylene carbonate with carbon dioxide and ethylene oxide or propylene oxide. The method adopts continuous circulation reaction; 150g / h ethylene oxide or propylene oxide and 2-4Mpa of carbon dioxide are respectively added from the bottom of a reactor; the reaction pressure is 1.0-5.0Mpa, the reaction temperature is 100-200 DEG C, and the reaction time lasts for 1-5 hours; a catalyzer is compositive catalyzer formed by carbonate and alkyl imidazolium or fxanol ionic liquid; the catalyzer is 7.5g / h, and the weight ratio of the carbonate to the alkyl imidazolium or fxanol ionic liquid ammonia is 1: 6.5; and the carbonate is alkali carbonate or aldaline-earth metal carbonate. The invention has simple process, high activity of the catalyzer and less loss of the catalyzer, the percent conversion of epoxy ethane reaches 96-99 percent, and the selectivity is 97-99 percent.

Description

Technical field: [0001] The invention relates to a method for synthesizing ethylene carbonate or propylene carbonate from carbon dioxide and ethylene oxide or propane, in particular to preparing ethylene carbonate by reacting carbon dioxide and ethylene oxide. Background technique: [0002] Ethylene (propylene) carbonate is a raw material for solvents and surfactants with excellent performance, especially for many polymers and resins. Ethylene carbonate can also be used as an intermediate in organic synthesis and used as a starting material for the synthesis of furazolidone. Raw material, used as water glass slurry, fiber finishing agent and other fiber processing agent, can be used as spinning liquid on textile, can also be directly used as solvent for removing acid gas and additive of concrete, and can also be used as plastic Foaming agent and stabilizer for synthetic lubricating oils. In addition, ethylene carbonate can also be used as a high-value-added high-energy batt...

Claims

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Application Information

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IPC IPC(8): C07D317/38C07D317/36B01J31/02B01J27/232
Inventor 石大川鲁荆林张成业马明君
Owner PETROCHINA CO LTD
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