Process method for synthesizing isobutyric acid by using microchannel reactor

A technology of microchannel reactor and process method, which is applied in the field of microchannel reactor synthesis of isobutyric acid, can solve the problems of inability to realize high-efficiency continuous work, low reaction selectivity, large area occupation, etc., and achieve improvement of primary conversion rate, transmission High heat and mass transfer and less by-products

Pending Publication Date: 2021-10-15
上海和创化学股份有限公司
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Problems solved by technology

At present, this process has the disadvantages of low reaction selectivity, many by-products, high consumption of raw materials, etc., and the equipmen

Method used

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Embodiment

[0027] The invention provides a kind of processing method of microchannel reactor synthetic isobutyric acid, comprises the steps:

[0028] Step S1: setting the reaction device, wherein the reaction device includes a mixing module and at least four reaction modules;

[0029] Step S2: mixing the materials and entering the reaction module of the reaction device for reaction;

[0030] Step S3: obtaining the product at the end of the reaction device;

[0031] In the step S1, the reaction device is a microchannel reactor, and the use of the microchannel reactor improves the primary conversion rate of the reaction, and can directly obtain isobutyric acid with a content of more than 70%; the reaction selectivity is improved, and the by-products are few, The consumption of raw materials is reduced; no need to occupy a large area, high heat and mass transfer, good mixing effect, and efficient continuous work can be achieved.

[0032] In the step S2, mixing materials includes the follo...

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Abstract

The invention discloses a process method for synthesizing isobutyric acid by a microchannel reactor, the process method comprises the following steps: S1, setting a reaction device which comprises a mixing module and at least four reaction modules; s2, mixing the materials, and enabling the materials to enter the reaction modules of the reaction device for reaction; s3, obtaining a product at the tail end of the reaction device; in the step S1, the reaction device is a micro-channel reactor; in the step S2, material mixing comprises the following steps: step S201, dissolving a catalyst in isobutyraldehyde to obtain a liquid-phase mixture; and step S202, conveying the liquid-phase mixture obtained in the step S201 and oxygen into a mixing module. According to the method, the risk of oxidation reaction is reduced, the one-time conversion rate of the reaction is improved, and isobutyric acid with the content of 70% or above can be directly obtained; the reaction selectivity is improved, byproducts are few, and the consumption of raw materials is reduced; the method does not occupy a large area, is high in heat and mass transfer and good in mixing effect, and can realize efficient and continuous work.

Description

technical field [0001] The invention relates to a method for synthesizing isobutyric acid, in particular to a process for synthesizing isobutyric acid with a microchannel reactor. Background technique [0002] Isobutyric acid is an important organic acid, mainly used in the synthesis of esters, cellulose flame retardants, synthetic resins and other organic synthesis. Industrially, isobutyric acid is mainly synthesized by liquid-phase oxidation of isobutyraldehyde and gas-phase catalytic hydrogenation of methacrylic acid, and the cost of gas-phase catalytic hydrogenation of methacrylic acid is high. [0003] At present, the liquid-phase oxidation method of isobutyraldehyde is adopted in industry, that is, isobutyraldehyde is oxidized with oxygen or air to synthesize isobutyric acid. At present, this process has the disadvantages of low reaction selectivity, many by-products, and high raw material consumption. Moreover, the equipment of this process needs to occupy a large ar...

Claims

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Application Information

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IPC IPC(8): C07C53/124C07C51/235B01J19/00
CPCC07C51/235B01J19/0093C07C53/124
Inventor 安丰发
Owner 上海和创化学股份有限公司
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