Micro-interface reaction system and method for preparing butyraldehyde through propylene carbonylation

Abstract

The invention provides a micro-interface reaction system for preparing butyraldehyde through propylene carbonylation. The micro-interface reaction system comprises a solvent storage tank, a reactor and a gas-liquid separator, wherein a propylene inlet and a synthesis gas inlet are sequentially formed in the side wall of the reactor from top to bottom; a solvent inlet is formed in the bottom of the reactor and is connected with the solvent storage tank; a demister is arranged between the reactor and the gas-liquid separator; products in the reactor are demisted by the demister and then flow into the gas-liquid separator for gas-liquid separation; a first micro-interface generator and a second micro-interface generator are arranged in the reactor; and the first micro-interface generator is connected with the propylene inlet and is used for dispersing and crushing propylene into microbubbles. The micro-interface reaction system greatly reduces the reaction temperature and pressure required by propylene carbonylation, and is low in energy consumption, low in cost, high in safety, few in side reaction, high in n-butyraldehyde yield and worthy of wide popularization and application.

Description

technical field [0001] The invention relates to the field of propylene hydroxylation reaction preparation, in particular to a micro-interface reaction system and method for producing butyraldehyde by propylene carbonylation. Background technique [0002] Butyl octanol is an important raw material for the synthesis of fine chemical products, and the preparation of n-butyraldehyde is the most important part in the process of preparing butanol octanol. In the prior art, the generation of butyraldehyde mainly takes synthesis gas and propylene as raw materials, and the rhodium carbonyl / triphenylphosphine complex is used as a catalyst to react to generate mixed butyraldehyde, which is further rectified to obtain a butyraldehyde mixture after separating the catalyst; but In the prior art, in the oxo reaction of synthesis gas and propylene under the action of a catalyst, the synthesis gas, propylene and catalyst cannot be fully mixed inside the oxo reactor, resulting in low reaction...

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Problems solved by technology

In the prior art, the generation of butyraldehyde mainly takes synthesis gas and propylene as raw materials, and the rhodium carbonyl / triphenylphosphine complex is used as a catalyst to react to generate mixed butyraldehyde, which is further rectified to obtain a butyraldehyde mixture after separating the catalyst; but In the prior art, in the oxo reaction of synthesis gas and propylene under the action of a catalyst, the synthesis gas, propylene and catalyst cannot be fully mixed inside the oxo reactor, resulting in low reaction efficiency and high energy consumption during the reaction process. And because the reaction temperature is too high, the yield of n-butyraldehyde in the butyraldehyde mixture generated is low, and the service life of the catalyst is short, which increases the production cost of the enterprise

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