Process for synthesizing carbonic ethenyl (allyl) ester from carbon dioxide and epoxy ethane (propane)

A technology of carbon dioxide and ethylene oxide, applied in the direction of carbon dioxide or inorganic carbonate preparation, chemical instruments and methods, molecular sieve catalysts, etc., can solve the problems of separation catalyst, catalyst loss, increased cost, etc., and achieve simple reaction process and high preparation method Simple and economical effect

Inactive Publication Date: 2005-01-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there is a problem of separating the catalyst from the product in the synthesis of ethylene (propylene) carbonate using a homogeneous catalyst, so that the catalyst is lost
For example, a method for preparing ethylene carbonate by the reaction of ethylene oxide and carbon dioxide uses potassium iodide as a catalyst. Since the reaction produces polyethylene glycol by-products, potassium iodide is dissolved in polyethylene glycol and is difficult to separate. As a result, potassium iodide and Polyethylene glycol is separated together, so that additional equipment is required to separate potassium iodide from polyethylene glycol, which increases the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 20 g of clover-shaped β-type molecular sieve into 200 g of 40% potassium iodide solution, soak for 30 hours, filter, and dry for 30 hours; the drying temperature is 150° C. to obtain a solid catalyst.

[0018] Add 420g of ethylene carbonate and 40mL of ethylene oxide to a 1L high-pressure reactor; 17.7g of β-type molecular sieve catalyst, react at 140°C and 5.25MPa for 2 hours, cool the reaction system to 40°C, and analyze the product. The content of ethylene oxide is 2.40%, the content of ethylene carbonate is 92.56%, and the conversion rate of ethylene oxide is 95.45%; the selectivity is 91.95%.

Embodiment 2

[0020] Utilize the catalyzer among the embodiment 1, then add the ethylene oxide of 420g ethylene carbonate, 40mL in the reactor; Reaction condition is identical with embodiment 1, product analysis, ethylene oxide content is 1.97%, ethylene carbonate The content is 94.14%, and the conversion rate of ethylene oxide is 96.22%; the selectivity is 93.95%.

Embodiment 3

[0022] Utilize the catalyzer among the embodiment 1, add the ethylene oxide of the ethylene carbonate of 420g, 40mL in the reactor again; Reaction condition is identical with embodiment 1, product analysis, ethylene oxide content 3.31%, ethylene carbonate content The conversion rate of ethylene oxide was 92.47%, and the conversion rate of ethylene oxide was 93.77%; the selectivity was 92.87%.

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PUM

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Abstract

The invention provides a process for synthesizing carbonic ethenyl (allyl) ester from carbon dioxide and epoxy ethane (propane), the reaction pressure being 3.0-7.0 MPa, the reaction temperature is 100-200 deg. C, wherein load type solid catalyst is employed, and beta-type molecular sieve is used as the carrier. the active component being alkali metal or halides of the alkaline earth metal or their mixture.

Description

technical field [0001] The invention relates to a method for preparing ethylene (propylene) carbonate by reacting ethylene oxide (propane) and carbon dioxide, in particular preparing ethylene carbonate by reacting ethylene oxide and carbon dioxide. 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. In addition, ethylene carbonate can also be used as a high-value-added high-energy battery electrolyte. [0003] Prior to the present invention, it was known to prepare ethylene (propylene) carbonate by using alkali metal halides, alkaline earth metal halides, ammonium halides, phosphorus halides. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/06C07C68/04C07C69/96
Inventor 张德胜石大川肖福魁鲁荆林
Owner PETROCHINA CO LTD
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