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Method for supplying reaction gases in catalytic vapor phase oxidation process

一种反应气体、氧化反应的技术，应用在有机化学方法、化学仪器和方法、有机氧化等方向，能够解决没有进行任何明确说明等问题

Active Publication Date: 2006-08-23
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, in the prior art, although the concentration composition as a fixed point that does not change is set in consideration of safety, when the concentration composition is changed as needed while continuing the operation, for those involved in the change process The composition, the method of ensuring security, and no explicit description

Method used

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  • Method for supplying reaction gases in catalytic vapor phase oxidation process
  • Method for supplying reaction gases in catalytic vapor phase oxidation process
  • Method for supplying reaction gases in catalytic vapor phase oxidation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] First, use experimental equipment to mix isobutylene, oxygen, and nitrogen at various composition ratios, and collect experimental data for composition points where explosion occurs and composition points where explosion does not occur. This experimental data was input into the computer equipped with the above-mentioned program, and it was set so that the explosion range of isobutylene and oxygen could be displayed on the monitor.

[0041] Next, in the production process of producing methacrolein by reacting isobutene with oxygen, isobutene, air, and exhaust gas from the capture process are mixed, and the Figure 7 The mixed gas (point A) adjusted so that the concentration of isobutene is 3.5% by volume and the concentration of oxygen is 11% by volume is supplied to the inlet of the oxidation reactor. The exhaust gas from the trapping process is used as a dilution gas for adjusting the composition. From this state, the operating load was changed to an isobutylene conce...

Embodiment 2

[0043] First, use experimental equipment to mix methacrolein, oxygen, and nitrogen at various composition ratios, and collect experimental data on composition points where explosion occurs and composition points that do not explode. Input the experimental data into the computer equipped with the above program, and set it so that the outbreak range of methacrolein and oxygen can be displayed on the monitor.

[0044] Next, in the production process of producing methacrylic acid by reacting methacrolein with oxygen, methacrolein, air, and exhaust gas from the capture process are mixed, and the Figure 8 A mixed gas (point A) having an isobutene concentration adjusted to 3.5% by volume and an oxygen concentration adjusted to 9.65% by volume as shown was supplied to the inlet of the oxidation reactor. The exhaust gas from the trapping process is used as a dilution gas for adjusting the composition. From this state, the operating load was changed to a methacrolein concentration of ...

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Abstract

A method for supplying reaction gases in which at least a material to be oxidized and a gas containing molecular oxygen are mixed and the resultant mixture is supplied to a catalytic gas-phase oxidation reactor, characterized in that, a feed rate of the material to be oxidized and a feed rate of the gas containing molecular oxygen are adjusted so that when a composition of a gas at the inlet of the catalytic gas-phase oxidation reactor is changed from a composition A point [the concentration of the material to be oxidized: R(a), and the concentration of oxygen: O(a)] represented by plotting a concentration of the material to be oxidized and a concentration of oxygen in the gas at said inlet to a composition B point [R(b) and O(b)] [the composition A point and the composition B point are compositions outside an explosion range, and R(a)<>R(b) and O(a)<>O(b)], compositions on the way of the change from the composition A point to the composition B point fall outside the explosion range.

Description

technical field [0001] The present invention relates to a reaction gas supply method, which is in the method of mixing the raw material to be oxidized and the gas containing molecular oxygen, and supplying to the catalytic gas phase oxidation reactor to carry out the catalytic gas phase oxidation reaction, changing the catalytic gas phase oxidation The composition of the reactor inlet gas can be used to safely and maximize the capacity of the manufacturing process. Background technique [0002] Conventionally, a method of mixing a raw material to be oxidized and a gas containing molecular oxygen and supplying the mixed gas to a reactor to perform a catalytic gas phase oxidation reaction is known. For example, there is a method of producing methacrolein by reacting isobutene with oxygen, and a method of producing methacrylic acid by reacting methacrolein with oxygen (see JP-A-2002-356450). [0003] When the catalytic gas phase oxidation reaction is carried out by mixing the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B33/00C07B61/00C07C47/22C07C57/055C07C45/35
CPCC07C45/35Y10T436/12C07C47/22C07B33/00C07C45/37
Inventor 加峰靖弘安藤佳正谷口芳行
Owner MITSUBISHI CHEM CORP
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