A countercurrent adsorption reaction device based on W catalyst + hydrogen peroxide homogeneous catalytic system and its application method

Abstract

The invention discloses a countercurrent adsorption reaction device based on a W catalyst + hydrogen peroxide homogeneous catalytic system and a method for using the same. The countercurrent adsorption reaction device includes a reaction raw material feeding device, a hydrogen peroxide feeding device, a microscopic mixing device, a first fixed bed reactor and the second fixed bed reactor, the inside of the first fixed bed reactor is filled with W catalyst and the adsorbent for adsorbing W catalyst, and the inside of the second fixed bed reactor is filled with the adsorbent. The present invention utilizes the characteristics of the W catalyst dissolving in hydrogen peroxide, combines the W catalyst and the adsorbent, through the "adsorption and desorption" path, and couples two fixed-bed reactors in series and the "counter-current adsorption" operation mode, and designs the counter-current adsorption The reaction device combines the catalytic reaction with the separation and recovery of the catalyst, which can realize the reuse of the catalyst and the continuity of the catalytic reaction.

Description

technical field [0001] The invention relates to a countercurrent adsorption reaction device based on a W catalyst+hydrogen peroxide homogeneous catalyst system and a use method thereof. Background technique [0002] In recent years, the oxidative cracking of olefins, cycloolefins, unsaturated fatty acids and their derivatives using hydrogen peroxide as an oxygen source and using transition metal catalysts has attracted more and more attention. Among them, tungsten catalysts have become a research hotspot due to their advantages of low price, low toxicity, and few side reactions. Catalyst (tungsten trioxide catalyst will be dissolved by hydrogen peroxide during the reaction process), and there are disadvantages such as difficulty in catalyst separation and recovery. [0003] At present, most of the above-mentioned methods for oxidative cracking of olefins, cycloolefins, unsaturated fatty acids and their derivatives using tungsten catalysts require the addition of organic sol...

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Problems solved by technology

Among them, tungsten catalysts have become a research hotspot due to their advantages of low price, low toxicity, and few side reactions. Catalyst (tungsten trioxide catalyst will be dissolved by hydrogen peroxide during the reaction process), and there are disadvantages such as difficulty in catalyst separation and recovery

[0003] At present, most of the above-mentioned methods for oxidative cracking of olefins, cycloolefins, unsaturated fatty acids and their derivatives using tungsten catalysts require the addition of organic solvents and are liquid-phase reactions. Most of the methods use mechanically stirred tank reactors, which mainly rely on stirring The slurry realizes the mixing of materials, and the liquid is easy to form a small circulation in the stirring process, resulting in insufficient contact between the catalyst and the reaction substrate, resulting in low reaction efficiency

In addition, the mechanically stirred tank reactor is a batch reactor, which requires intermittent chemical reactions in one tank after another during operation. It is only suitable for small batch production and has great limitations for large-scale industrial production.

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