Continuous production process for alkaline synthesis of potassium isopropoxide

Abstract

The invention provides a continuous production process for alkaline synthesis of potassium isopropoxide. According to the production process, potassium hydroxide and isopropyl alcohol are used as raw materials for reaction to prepare the potassium isopropoxide. A device relating to the production process comprises an alcohol / alkane solution storage tank, an alkaline solution storage tank, a metering pump, a reaction rectifying tower, a condenser of the reaction rectifying tower, a liquid-liquid phase splitter, an alcohol / alkane recycling tower, a condenser of the alcohol / alkane recycling tower, a reboiler of the alcohol / alkane recycling tower, a reboiler of the reaction rectifying tower, and an alcohol / alkane solution evaporator. The filling height of the continuous production process is obtained through a power law type reaction kinetic equation according to a reaction rate of isopropyl alcohol and potassium hydroxide, so as to meet positive reaction of continuous production of the potassium isopropoxide; the potassium isopropoxide produced through the process meets product requirements. The continuous production process is simple in flow, and the raw materials are low in cost and readily available; the continuous production process is safe to operate and convenient for implementation of a monitoring and automation system; the product production time can be greatly shortened, the yield is effectively increased, and the comprehensive energy consumption is reduced.

Description

technical field [0001] The invention relates to a continuous production process for synthesizing potassium isopropoxide by an alkali method, belonging to the technical field of fine chemicals. Background technique [0002] Potassium isopropoxide is a strong oxidant and an important organic synthesis intermediate, mainly used in medicine, pesticide, chemical industry, food, leather and other industries. [0003] At present, the synthesis methods that can be industrialized include metal method and alkali method. The metal method is prepared by chemical reaction of metal potassium and isopropanol as raw materials. The advantages are high content of potassium isopropoxide, stability and reliability, and low free base. Explosive safety hazard. Alkali method is prepared by reacting potassium hydroxide and isopropanol. The alkali method overcomes the shortcomings of the metal method production process, greatly improves the safety of production, and becomes the mainstream synthesi...

AI Technical Summary

Problems solved by technology

In the alkaline production process of potassium isopropoxide, isopropanol and water belong to the azeotropic system, and ordinary reactive distillation methods cannot obtain potassium isopropoxide products with low free alkali content, and azeotropic method is often used in industry Dehydration, by adding an entrainer that does not participate in the reaction, such as benzene, acetone, cyclohexane, etc., into the raw material, it forms a new azeotrope with water and other components in the rectification tower and enters the vapor phase through mass transfer, from out of the reaction system

[0005] In the batch production process of preparing potassium isopropoxide by alkaline method, the raw materials in the reactor need to be heated by circulation, which consumes a lot of energy, and it needs to start and stop and intermittent raw material input and product extraction, and the production capacity per unit time is low; at the same time, in In this process, the labor intensity of the personnel is high, the operation steps are many, the operation is frequent, and the operation methods of different personnel are different, which may easily cause fluctuations in product quality and misoperation.

[0006] Azeotropic reaction distillation to produce potassium tert-butoxide in the article, the process of combining reaction and azeotropic distillation on the interface and a packed column with a large specific surface area were used to obtain the target product of strong reversible reaction, but the The article only deals with the batch production process, which also has the usual disadvantages of the process

The process design of sodium hydroxide method to produce sodium isopropoxide adopts batch preparation process in the article, can eliminate free alkali without isopropyl acetate, has saved raw material, has simplified operation but also does not mention the continuous of alkali method synthesis potassium isopropoxide Any insight into the production process

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