Process for producing diacetone alcohol

Abstract

An object of the present invention is to provide a method for producing diacetone alcohol capable of long-term operation. The present invention relates to a method for producing diacetone alcohol, which in the presence of a solid alkaline catalyst containing at least (i) a metal hydroxide selected from alkali metal hydroxides and alkaline earth metal hydroxides and (ii) a binding agent, Producing diacetone alcohol from acetone is characterized by using a solid basic catalyst having a pore diameter of 0.01 μm to 1 μm and a pore volume of 1.8 ml / g as a solid basic catalyst.

Description

technical field [0001] The present invention relates to the manufacture method of diacetone alcohol. Background technique [0002] As a catalyst for condensing aldehydes or ketones to produce dimers, solid basic catalysts based on alkali metal hydroxides and / or alkaline earth metal hydroxides are usually used. A report on a method for producing a catalyst with a small reduction rate. [0003] For example, Patent Document 1 describes that barium hydroxide octahydrate containing particles having a particle size of 149 μm or less in a ratio of 30% by weight or more is used as a raw material for preparing a catalyst. In the method disclosed in Patent Document 2, a molded product obtained by mixing barium hydroxide octahydrate, an inert solid, a binder and water is heat-treated at 40° C. to 65° C. for 2 hours or more under airtight conditions. And, the method disclosed in Patent Document 3 is that when the mixture containing barium hydroxide octahydrate, inert solid, binding ag...

AI Technical Summary

Problems solved by technology

[0004] However, when diacetone alcohol is produced from acetone using the catalysts produced by these methods, there is a problem that the initial activity or the rate of activity decrease of the obtained catalyst varies greatly depending on the production lot number of the catalyst.

For this problem, although it is possible to conduct a small-scale activity test of the catalyst before putting it into the mechanical equipment, and then select the catalyst and put it into the actual reaction vessel, but there is also the problem of time-consuming measurement of the activity reduction rate of the catalyst.