A kind of propylene hydration reaction prepares the method for isopropanol

Abstract

The invention discloses a method for preparing an isopropyl alcohol through the hydration reaction of propylene and belongs to a hydration reaction of carbon-carbon double bonds of acyclic compounds. Through taking propylene or a propylene-containing mixture and water as raw materials, in the presence of a catalyst, a hydration reaction of gas-liquid phases occurs, and then an isopropyl alcohol and / or isopropyl ether is prepared; the method is characterized in that any one or a mixture of more than two of polyethylene glycol nonylphenyl ether, polyethylene glycol octylphenol ether and N-Methyl-2-pyrrolidone are added in a reaction system as reaction solvents. The invention discloses a method for preparing an isopropyl alcohol through the hydration reaction of propylene, and the method is simple in operation, not required to be additionally equipped with equipment, and can be used for inhibiting the polymerization of propylene in the reaction, improving the selectivity of propylene generated into an isopropyl alcohol, and optimizing the intersolubility of propylene and water, thereby significantly improving the conversion rate of propylene, and achieving the effects of energy conservation and environmental conservation. The conversion rate of propylene is over 5%. The added reaction solvents can be cyclically utilized without being separated and recovered, and no additional equipment is required to be added, thereby saving investment and energy consumption.

Description

technical field [0001] The invention relates to a method for preparing isopropanol through hydration reaction of propylene. It belongs to the hydration reaction of carbon-carbon double bond of acyclic compound. Background technique [0002] Under the action of a catalyst, propylene and water undergo a hydration reaction to produce isopropanol and by-product isopropyl ether. Isopropanol is a common chemical solvent and pharmaceutical intermediate, and is a basic chemical raw material. Isopropanol has good solubility to oils, waxes, gums, resins and alkaloids, etc. It can be used as a paint solvent for primers, varnishes, paints, printing inks, etc.; it is also used as a detergent, perfume, shampoo, etc. Solvents for cosmetics such as preservatives, skin cleansers, and nail polishes; also widely used in aerosols. Since propylene and water are almost immiscible, the conversion rate of propylene in the propylene hydration reaction process is not high, generally 40-70%. Propy...

AI Technical Summary

Problems solved by technology

[0007] 1. Since propylene and water are almost immiscible, it is difficult to increase the conversion rate of propylene in the process of propylene hydration reaction, generally 40-70%. Propylene is easy to polymerize in the reaction, and the selectivity of propylene to isopropanol is not high

[0008] 2. The structure of the high-shear device is very complicated, which increases the investment of the device and consumes a lot of energy

Images