A method and device for producing sodium methoxide at high temperature and high pressure

Abstract

The invention relates to a method for high temperature and high pressure production of sodium methoxide and a device thereof. The production method comprises the steps of alkali dissolution, synthesis and drying. The main device comprises an alkali dissolution liquid tank, a clear liquid tank, a reaction tower, a rectifying tower and a vacuum drier. The reaction is performed under the conditions of high temperature and high pressure to produce sodium methoxide, alkali in raw material methine liquid is in a supersaturated state, the reaction is full, the yield is improved to 99.5% from about 98% compared with a conventional process, and the content of free alkali in sodium methoxide is smaller than 0.4%. For the production of each ton of sodium methoxide product, the power consumption is reduced by 18 KWh, and steam is reduced by 2.5 tons. According to the method, continuous industrial production controlled by a distributed control system is implemented, workers' labor intensity is reduced greatly, materials are all conveyed in a sealed space, environmental pollution caused by harmful gas is avoided, the method and the device save energy and are good in consumption reduction, and the product competiveness is high.

Description

technical field [0001] The invention relates to chemical production technology and equipment, in particular to a method and device for producing sodium methoxide at high temperature and high pressure. Background technique [0002] At present, there are two production methods of sodium methoxide: sodium method and alkali method, and sodium method includes metal sodium method and sodium-based sodium method. Among them, the sodium-based method cannot be used in industrial production and has no industrial value; the production cost of the metal sodium method is too high, and there are certain safety hazards, which prevent it from producing sodium methoxide on a large scale; although the alkali method is convenient for raw material procurement, the safety hazard is relatively high Low, but the slow reaction speed leads to low production capacity of a single set of equipment, and the water generated by the reaction must be removed in time with anhydrous methanol before the reactio...

AI Technical Summary

Problems solved by technology

Among them, the sodium-based method cannot be used in industrial production and has no industrial value; the production cost of the metal sodium method is too high, and there are certain safety hazards, which prevent it from producing sodium methoxide on a large scale; although the alkali method is convenient for raw material procurement, the safety hazard is relatively high Low, but the slow reaction speed leads to low production capacity of a single set of equipment, and the water produced by the reaction must be removed in time with anhydrous methanol before the reaction can continue, the steam consumption is high, and the energy consumption is large

[0003] Chinese invention patent CN 103288593B discloses a mechanical vapor recompression sodium methoxide production device and method, which uses sodium hydroxide to react with methanol steam, which is a traditional process, and the degree of industrialization is unknown; The latent heat of phase change is used to provide stripping steam for the sodium methoxide reaction tower and the methanol rectification tower to achieve energy saving effects. The specific energy saving data are not reflected in the public documents

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