Cumene hydroperoxide normal-pressure tubular reactor and production technology

Abstract

A cumene hydroperoxide normal-pressure tubular reactor and production technology belong to the technical fields of an organic peroxide oxidation apparatus and production technology. The reactor comprises reactor bodies, spiral tube heat exchangers, a condenser and connection pipelines. The reactor is characterized by comprising no less than two reactor bodies (11), which are connected through flanges to form no less than four reactor sets. A tube wall of the first reactor set which is counted from the left is provided with a feed inlet, and a tube wall of the first reactor set which is counted from the right is provided with a feed outlet. One end of the connected reactor set is connected to a condenser through a reactor connection pipe and a condenser connection pipe, and a tube wall located at the other end is internally equipped with an air distributor, which is connected to an air inlet pipe connecting pipe through an air inlet pipe connecting pipe flange, the air inlet pipe connecting pipe is connected to an air inlet pipe, the air inlet pipe is connected to an air compressor, and the reactor bodies are internally provided with the spiral tube heat exchangers. The reactor is simple in structure, low in cost, convenient to use, and high in production efficiency, the product purity can reach about 95%, and the safety of the reactor is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of an organic peroxide oxidation device and a production process, and in particular relates to an atmospheric pressure tubular reactor and a production process for generating cumene hydrogen peroxide through the oxidation reaction of cumene and air. Background technique [0002] Cumene air oxidation reaction generates cumene hydroperoxide (CHP for short), is the first step reaction of cumene method to produce cumene peroxide (DCP), is also the most important reaction. The existing cumene oxidation reaction is greatly affected by the pH value. If the acidity in the reaction system is high, that is, the pH value is low, it is very unfavorable for the oxidation reaction. Because acidic substances will promote the decomposition of CHP, and the product of acid decomposition, phenol, further inhibits the reaction. Therefore, it is necessary to control the pH value within a certain range. Generally, the pH value ...

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Problems solved by technology

Second, because CHP is unstable and thermally decomposes, the thermal decomposition is serious at 80°C, and when the temperature rises, the thermal decomposition is more severe. In the case of acidic substances in the enrichment system, explosions often occur because of this , therefore, the oxidation solution cannot be concentrated by atmospheric distillation, and the safety of the two devices needs to be further improved

Third, the above two reactors are seriously backmixed, and the yield of by-products is high, accounting for about 10% of the target product, and the selectivity is poor.

Fourth, the air residence time is short and the oxygen utilization rate is low

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