Device and method for preparing cyclohexenyl cyclohexanone

Abstract

The invention relates to a device and a method for preparing cyclohexenyl cyclohexanone as an intermediate of o-phenylphenol. The device comprises a column bottom 6, a tower reactor 5, an all-reflex condenser 1 and an oil-water separator 2, wherein the reactor 5 consists of a reaction separation section 3 and a separation section 4; a catalyst bag is placed in a catalyst frame on a tower plate of the reaction separation section 3 of the tower separator, cyclohexanone in the column bottom is heated and steamed out and enters the tower plate of the reaction separation section 3 through the separation section 4 to form a liquid layer so that the catalyst in the catalyst frame is immersed in the cyclohexanone liquid, cyclohexanone undergoes a condensation reaction under the action of the catalyst to generate cyclohexenyl cyclohexanone and water, the cyclohexenyl cyclohexanone leaves the reaction section and moves towards the lower part of the tower under the separation action of the tower plate, and finally enters the column bottom, the generated water and cyclohexanone are steamed out together from the top of the tower and undergo phase splitting in the oil-water separator after being condensed. The once-through conversion of the cyclohexanone can reach over 95 percent and the selectivity of the cyclohexenyl cyclohexanone can reach over 98 percent.

Description

technical field [0001] The present invention relates to a preparation device and method of cyclohexenyl cyclohexanone, an intermediate of o-phenylphenol, in particular to a method for preparing cyclohexenyl cyclohexanone with cyclohexanone as a raw material with high conversion rate and high selectivity Preparation method and device thereof. Background technique [0002] O-phenylphenol (OPP) is a fine chemical and organic intermediate with a wide range of uses. It can be used as antiseptic, antifungal agent, broad-spectrum fungicide, used for fruit preservation, cosmetics, wood preservation, and household, public places, Disinfection of swimming pools and hospitals, it can also be used to produce oil-soluble o-phenylphenol formaldehyde resins, non-ionic emulsifiers, synthetic dyes, water-based cutting fluids, etc. Agents and intermediates of flame retardant polymer materials, etc. At present, cyclohexanone is mainly used as raw material at home and abroad, and the intermed...

AI Technical Summary

Problems solved by technology

As the reaction proceeds, the concentration of moisture and product cyclohexenyl cyclohexanone in the system increases constantly, and the high water concentration increases the reverse reaction rate, so the single-pass conversion rate of cyclohexanone is not high; the product cyclohexenyl cyclohexanone in the system The increase of ketone concentration increases the chance of further reaction of cyclohexenyl cyclohexanone and cyclohexanone to generate by-products, so the selectivity decreases; after the reaction, the catalyst will be separated out, generally through water washing and alkali washing, resulting in certain A large amount of waste water containing organic matter will pollute the environment

Images