Method for continuously preparing prenol

Abstract

The invention discloses a method for continuously preparing prenol. The method comprises the following steps: taking 3-methyl-3-butene-1-ol as a raw material, dissolving a catalyst in the raw material, adding a solvent according to a ratio, pumping the raw material into a reaction tube through a plunger pump under a certain pressure and temperature, carrying out a reaction, cooling the reaction liquid, then collecting the reaction liquid, and carrying out rectifying to obtain a prenol pure product, wherein the purity of the product is greater than 99%. According to the method disclosed by theinvention, preparation is carried out in a continuous mode, and operation is simple and convenient; the preparation is carried out in a non-hydrogen state, the adopted catalyst does not need to be prepared in advance, and precious metals such as palladium, cerium and tellurium are not used, so that production cost is low.

Description

technical field [0001] The invention provides a method for continuously preparing prenol, and relates to the field of fine chemical product production. Background technique [0002] 3-Methyl-2-buten-1-ol, both prenol, is an important organic synthesis intermediate, widely used in the fields of pesticides and synthetic fragrances, as people synthesize prenol With the continuous deepening of the process, its application range will become wider and wider, and the demand will also increase greatly. Therefore, the research on the synthesis technology of prenyl alcohol is of great significance. [0003] The traditional method for producing isoprenol is the isoprene method, which uses isoprene as a raw material and is prepared through multiple steps such as oxidation, esterification, and saponification. The process route is long, the product selectivity is low, and it is harmful to the environment. serious pollution. [0004] In recent years, isobutene and formaldehyde are used a...

AI Technical Summary

Problems solved by technology

[0003] The traditional method for producing isoprenol is the isoprene method, which uses isoprene as a raw material and is prepared through multiple steps such as oxidation, esterification, and saponification. The process route is long, the product selectivity is low, and it is harmful to the environment. serious pollution

[0004] In recent years, isobutene and formaldehyde are used as raw materials to prepare isopentenol. This method is simple in process and less polluting. Isobutene and formaldehyde are condensed to obtain 3-methyl-3-buten-1-ol, and isomerized to obtain isopentenol. Alcohol, the patent WO2008037693 uses a heterogeneous noble metal catalyst, isomerizes in the state of hydrogen, uses noble metals such as Pb, Se and Te to prepare the catalyst, the production cost is high, and the safety risk of the hydrogen test is high

Patent CN1071141197 uses carbonyl iron, organic bases and epoxy ligands to form a catalyst. The catalyst has many components, and it is not easy to separate after the reaction, and the reaction time is long

Images