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System and method for simultaneously producing methacrylic acid and methacrolein

A technology of methacrolein and methacrylic acid, applied in chemical instruments and methods, carboxylate preparation, carbon-based compound preparation, etc., can solve problems affecting production cost and product quality, improve production efficiency and reduce clogging , The effect of improving product yield

Active Publication Date: 2017-05-10
齐翔华利新材料有限公司
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  • Description
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Problems solved by technology

At the same time, there are impurities such as unreacted raw materials and by-products in the catalytic oxidation process of tert-butanol or isobutene. How to effectively recover raw materials and remove impurities will directly affect the production cost and product quality.

Method used

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  • System and method for simultaneously producing methacrylic acid and methacrolein
  • System and method for simultaneously producing methacrylic acid and methacrolein

Examples

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Embodiment

[0041] Example: such as figure 1 and figure 2 As shown, a system for producing methacrylic acid and co-producing methacrolein includes a raw material feed preheater 1, a raw material vaporization tower 2, an air compressor 3, a first oxidation reactor 4, and a second oxidation reactor 5 , quenching acid washing coupling tower 6, methacrolein stripping tower 7, methacrolein absorption tower 8, methacrolein recovery tower 9, methacrolein light removal tower 10 and methacrolein weight removal tower 11 ;

[0042] The raw material feed preheater 1 is connected to the upper feed port of the raw material vaporization tower 2, and the top outlet of the raw material vaporization tower 2 and the outlet of the air compressor 3 pass through the first mixer 12 and the top of the first oxidation reactor 4 The feed port is connected, the bottom feed port of the first oxidation reactor 4 is connected with the bottom feed port of the second oxidation reactor 5 through the second mixer 13, a...

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Abstract

The invention discloses a method and system for simultaneously producing methacrylic acid and methacrolein. The system comprises a raw material feed preheater, a raw material vaporizing tower, a first oxidation reactor, a second oxidation reactor, a rapid cooling / acid washing coupled tower, a methacrolein stripping tower, a methacrolein absorption tower, a methacrolein recovery tower, a methacrolein light component removal tower and a methacrolein heavy component removal tower. The method comprises the following steps: preheating and vaporizing a raw material tert-butyl alcohol or isobutylene; then mixing with air and water; feeding to a catalyst-filled fixed-bed reactor; performing oxidation reaction to generate methacrylic acid and methacrolein; and performing effective rapid cooling, absorption and rectification to finally obtain 99%wt methacrolein and 30%wt crude methacrylic acid. The method and system have the advantages that the reaction conversion rate is high, the unreacted raw material can be effectively recovered, impurities and solid particles are removed, and high-purity methacrylic acid and methacrolein are produced.

Description

technical field [0001] The present invention relates to a system and method for producing methacrylic acid and methacrolein. Background technique [0002] Methacrylic acid is an important organic chemical raw material, mainly used to produce methyl methacrylate, which can be used to produce chemical products such as coatings and additives, or as a raw material for the production of organic glass. [0003] Methacrolein is not only an important intermediate for the synthesis of methacrylic acid and methyl methacrylate, but also an intermediate for the synthesis of important fine chemical products such as pharmaceuticals, pesticides, and dyes. [0004] The production of methacrolein and methacrylic acid by catalytic oxidation of tert-butanol or isobutene is a very clean and important method. How to effectively increase the reaction conversion rate is the key to improving reaction efficiency, improving product quality, and reducing process energy consumption. At the same time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/23C07C51/25C07C57/04C07C45/37C07C45/35C07C47/22
CPCC07C45/35C07C45/37C07C51/23C07C51/252C07C57/04C07C47/22Y02P20/50
Inventor 梅鑫谷新春王爱芳李全陶小钰汪青海吴立娟王文娟孙冲胡晓铮王宇光孟启贵王笛
Owner 齐翔华利新材料有限公司
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