A kind of method for continuously preparing isopentenol

Abstract

The invention discloses a method for continuously preparing isopentenol. The method is as follows: using 3-methyl-3-butene-1-alcohol as a raw material, dissolving a catalyst in the raw material, and adding a solvent according to the proportion , under a certain pressure and temperature, use a plunger pump to pump the raw materials into the reaction tube for reaction, collect the reaction solution after cooling, and rectify to obtain pure prenol, the product purity is greater than 99%. The method of the invention is prepared in a continuous manner, and the operation is simple and convenient, and the reaction is carried out in a non-hydrogen-facing state. The catalyst used does not need to be prepared in advance and does not use noble metals such as palladium, cerium, and tellurium, and the production cost is low.

Description

technical field [0001] The invention provides a method for continuously preparing prenol, which relates to the field of fine chemical product production. Background technique [0002] 3-Methyl-2-buten-1-ol, also known as prenol, is an important intermediate in organic synthesis and has a wide range of uses in the fields of pesticides and synthetic fragrances. With the continuous deepening of the process, its application scope will become more and more extensive, and the demand will also increase greatly. Therefore, the research on the synthesis technology of prenol 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 environmentally friendly. serious pollution. [0004] In recent years, isobutene and formaldehyde are used a...

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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

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