A kind of process device and method for preparing acetal by monoalcohol-air catalytic conversion

Abstract

Disclosed by the present invention are a processing system and method for preparing an acetal by using monohydric alcohol-air catalytic conversion, which solves the problems in the existing technology wherein costs are high, safety and environmental protection risks are high, conversion efficiency is low, fast and precise control of production conditions is not possible, and continuous industrial chemical production is not possible. The feeding system of the present invention comprises a raw material tank, a reciprocating metering pump, an air generating device, and a mass flow meter; a heating mixing system comprises a gas pre-heater, a liquid pre-heater, a gas pre-heating pipe, a liquid pre-heating pipe, a gas-liquid mixed pre-heating pipe, a vaporization mixer, and a overheating pipe; a catalytic conversion system comprises a fixed bed catalytic reactor; a condensing system comprises a deep cooler and a circulating refrigerator; a gas-liquid separation system comprises a gas-liquid separation tower, a product tank and a wet flow meter. A monohydric alcohol and air enter the heating mixing system by means of the feeding system and are heated and mixed, then entering the catalytic conversion system to react, a reaction tail gas being condensed by means of the condensing system and being separated by means of the gas-liquid separation system to obtain a liquid product containing the acetal.

Description

technical field [0001] The invention belongs to the technical field of organic catalysis, and in particular relates to a process device and method for preparing acetal by monoalcohol-air catalytic conversion. Background technique [0002] Catalytic oxidation of monohydric alcohols can produce compounds with higher added value such as acetals. Methanol is an important basic chemical raw material. In the past 20 years, with the introduction of the policy and layout of the country to encourage the development of the coal chemical industry and the improvement of methanol production technology, a large number of large-scale methanol production devices have been launched, and the methanol production capacity has grown rapidly. As an important basic chemical raw material and product, due to insufficient development of its downstream products, methanol production has serious overcapacity. At present, my country's methanol production capacity may be as high as 81 million tons, and t...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a process device for producing acetal by monoalcohol-air catalytic conversion, which solves the problem of large investment, high production cost and high energy consumption in the prior art when monohydric alcohol-air catalytic conversion is used to produce acetal. The conversion efficiency is low, the risk of safety and environmental protection is high, the production conditions cannot be controlled quickly and accurately, and the continuous industrial production cannot be carried out.

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