Acrylic acid synthesis method

A synthesis method and technology of acrylic acid are applied in chemical instruments and methods, preparation of carboxylate, preparation of organic compounds, etc., can solve the problems of low propylene conversion rate and methacrylate yield, etc., and achieve improved yield and improved reaction. active effect

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Propylene conversion rate and methacrylate yield are low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Anhydrous and oxygen-free treatment of solvents. The water removal process of acetonitrile and tetrahydrofuran adopts P 2 o 5 and anhydrous Na 2 SO 4 Dry overnight, carry out the deoxygenation process in a distillation flask in the presence of Na or benzophenone, evaporate the solvent after acetonitrile is refluxed at 85°C for 3 hours, and evaporate the solvent after tetrahydrofuran is refluxed at 75°C for 3 hours.

[0023] Preparation of Ru-based metal complex catalysts. Take 0.007molRuCl 3 Add 0.007mol bis(diphenylphosphine)methane into the Schlenk reaction flask, then add 0.06mol metal sodium, connect the reaction flask to the Schlenk device, and use high-purity argon to replace the air in the flask to ensure that the reaction flask And the anhydrous and oxygen-free environment in the Schlenk device, after three replacements, use a vacuum pump to pump the reaction bottle to a negative pressure state, and move 70ml of tetrahydrofuran through anhydrous and anaerob...

example 2

[0026] Preparation of Ru-based metal complex catalysts. Take 0.006mol RuCl 3 Add 0.01mol bis(diphenylphosphine)methane into the Schlenk reaction flask, then add 0.09mol metal sodium, connect the reaction flask to the Schlenk device, and replace the air in the flask with high-purity argon to ensure that the reaction flask And the anhydrous and oxygen-free environment in the Schlenk device, after three replacements, use a vacuum pump to pump the reaction bottle to a negative pressure state, and move 90ml of tetrahydrofuran through anhydrous and anaerobic treatment into the reaction bottle with a moving needle. Under the protection of argon, stir at 15°C for 150min, and distill off the solvent from the obtained solution at 70°C under reduced pressure to obtain a Ru-based metal complex catalyst.

[0027] CO 2 The reaction process of synthesizing acrylic acid with ethylene is carried out in an autoclave, first add 15g of anhydrous Na to the autoclave 2 CO 3 And seal the autocla...

example 3

[0029] Anhydrous and oxygen-free treatment of solvents. The water removal process of acetonitrile and tetrahydrofuran adopts P 2 o 5 and anhydrous Na 2 SO 4 Dry overnight, carry out the deoxygenation process in a distillation flask in the presence of Na or benzophenone, evaporate the solvent after acetonitrile is refluxed at 85°C for 3 hours, and evaporate the solvent after tetrahydrofuran is refluxed at 75°C for 3 hours.

[0030] Preparation of Ru-based metal complex catalysts. Take 0.004molRuCl 3 Add 0.009mol bis(diphenylphosphine)methane into the Schlenk reaction flask, then add 0.06mol metal sodium, connect the reaction flask to the Schlenk device, and replace the air in the flask with high-purity argon to ensure that the reaction flask And the anhydrous and oxygen-free environment in the Schlenk device, after three replacements, the vacuum pump is used to pump the reaction bottle to a negative pressure state, and the tetrahydrofuran 130ml through the anhydrous and ox...

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Abstract

The invention discloses an acrylic acid synthesis method. The method is characterized by directly synthesizing acrylic acid by using CO2 and ethylene as raw materials, acetonitrile as a solvent and a metal Ru complex as a catalyst, wherein the mole ratio of ethylene to carbon dioxide is (1 to 1)-(1 to 5), preferably (1 to 2)-(1 to 4); the reaction temperature is 40-130 DEG C, preferably 50-120 DEG C; the reaction pressure is 0.5-6.0MPa, preferably 1.0-5.5MPa. In the method, acrylic acid is directly synthesized by using CO2 and ethylene as the raw materials. The method has the advantages of low reaction temperature, high product yield, and the like.

Description

technical field [0001] The present invention relates to a kind of synthetic method of acrylic acid, specifically relate to a kind of 2 A method of directly synthesizing acrylic acid with ethylene as raw material. Background technique [0002] With the increasing dependence of modern society on petrochemical resources, increasing CO 2 The emission problem is not only an environmental problem, but has risen to the level of international relations and human survival and development. CO 2 The greenhouse effect caused by the rapid increase will seriously threaten the survival of human beings. Global energy shortages and CO 2 The increasingly serious environmental problems caused by it force people to find ways to solve these problems, so as to devote themselves to CO 2 processing utilization. The most direct CO 2 The treatment method is how to consume more CO 2 , to achieve CO 2 recycling to fundamentally solve CO 2 question. CO 2 The chemical utilization is to achiev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/15C07C57/04
CPCC07C51/15C07C57/04
Inventor 孙潇磊张志智尹泽群刘全杰宋喜军
Owner CHINA PETROLEUM & CHEM CORP
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