Synthesis process of diacetone alcohol

Abstract

The invention relates to a synthesis process of a diacetone alcohol. According to the technical scheme, the synthesis process comprises the following steps: adding an acetone into a reaction container; heating and distilling; enabling the condensated acetone to pass through a storage tank in which a catalyst is contained and enabling the mixture to flow into a receiver; and stopping the heating until the acetone is complete dried in an evaporation manner. The per-pass conversion of the acetone reaches more than 16%, so that the reaction time is effectively reduced. The catalyst is prepared from inorganic polymer composite materials, so that the catalyst is non-corrosive and can be recycled times without number, namely, the service life of the catalyst is very long. For the synthesis process, the lower the reaction temperature, the better in the reaction, so that the energy consumption and the production cost are greatly reduced. Thus, according to the technical scheme, the synthesis process which is high in acetone per-pass conversion, short in reaction time as well as low in energy consumption and production cost is provided.

Description

technical field [0001] The invention relates to a synthesis process of diacetone alcohol. Background technique [0002] Diacetone alcohol (DAA), also known as diacetone alcohol or 4-hydroxy-4-methyl-2-pentanone, has a specific gravity (25°C / -4°C) of 0.936, a boiling point of 164°C, and a melting point of - 44°C, the flash point (opening) is 13°C, the ignition point is 603.3°C, and the refractive index is 1.4235. Diacetone alcohol is a colorless and transparent liquid with aromatic odor. It can be miscible with various solvents such as water, alcohol, ether, ketone, fat, aromatic hydrocarbon, halogenated hydrocarbon, etc., and can dissolve oil, wax, natural Resin, nitrocellulose, ethyl cellulose, polymethyl methacrylate, polystyrene, polyvinyl acetate and dyes, etc. Therefore, diacetone alcohol is widely used as a high boiling point solvent, paint thinner, wood stain, Raw materials for rust removers and dyes, solvents for resins, solvents for nitrocellulose, fats, greases, ...

AI Technical Summary

Problems solved by technology

After treating acetone with this method, the yield of diacetone alcohol can reach 12.9%-15.3% when reacting for 48 hours. Although the conversion rate of acetone has increased, the reaction time is still relatively long, and the deactivation rate of the catalyst is relatively long. Fast, the life of the catalyst is relatively short

[0007] Chinese patent CN102757327A provides a method for preparing diacetone alcohol by oxidizing acetone. The method includes: under oxidation reaction conditions, acetone and hydrogen peroxide are contacted with a catalyst containing titanium-silicon molecular sieve. into the reactor for continuous reaction, although the conversion rate of acetone is relatively high, but the reaction needs to be carried out at a higher temperature and higher pressure, and the energy consumption is relatively high

Images