Method for preparing cyclohexanol by hydrolyzing cyclohexyl formate

Abstract

The invention discloses a new "backpack" reactive distillation process for preparing cyclohexanol by hydrolyzing cyclohexyl formate and water as raw materials. The backpack reactor is placed outside the rectification tower, and the first Cyclohexyl formate is continuously fed into the knapsack reactor for hydrolysis reaction, and the feed to the rest of the knapsack reactors comes from the upper tray of the rectification tower, and then enters the next tray of the rectification tower after reaction , obtain the product that cyclohexanol mole fraction is more than 95%. The "backpack" reaction and the rectification tower are both interconnected and independent. This coupling method can not only maintain the advantages of the integrated reaction distillation technology, but also make the operating conditions of the reactor and the rectification tower independent of each other. The process flow is short, the operation control is flexible, the production cost is low, and the economic benefit is high. At the same time, the volume of the reactor and the reaction volume can be adjusted freely, which realizes the best match between the reaction capacity and the separation capacity, and is conducive to the realization of large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a new production process of cyclohexanol, in particular to a method for preparing cyclohexanol by hydrolysis of cyclohexyl formate, which is a method of using cyclohexyl formate and water as raw materials, through "backpack type "The method of preparing cyclohexanol by the coupling process of reaction and rectification in the reactor. Background technique [0002] Cyclohexanol is an important chemical intermediate used in the production of nylon, adipic acid, caprolactam and other chemical products. In my country, cyclohexanol is mainly used as an intermediate in the production of adipic acid and amine compounds. [0003] The traditional preparation methods of cyclohexanol mainly include cyclohexane oxidation method and phenol hydrogenation method. At present, cyclohexane oxidation method is mainly used in industry. Patent CN102627541A introduces a process and equipment for prepa...

AI Technical Summary

Problems solved by technology

Since the traditional reactive distillation coupling is carried out in the same column, the negative pressure operation of the reactive distillation column causes the temperature of the reaction tray to be 15-30°C, which greatly reduces the reaction rate, and the loading and unloading of the catalyst on the rectification tray It is difficult to replace

Images