Preparation method of isopentenyl alcohol

A technology of prenol and butene, which is applied in the field of preparation of prenol, can solve the problem of low effective conversion rate of raw materials, and achieve the effect of one-time conversion rate improvement, good contact effect and good effect

Inactive Publication Date: 2019-09-20
安徽智新生化有限公司
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Problems solved by technology

[0003] The synthetic method of isopentenol is more according to different kinds of raw materials, and one of them is to form isopentenol by hydrogen isomerization with 3-methyl-3-buten-1-alcohol as raw material, and this method is because raw material is easy to obtain , cheap, and become a hot spot in the research of prenol production; it is recorded in U.S. Patent US4310709A that Pd/C alone is used to catalyze 3-methyl-3-buten-1-ol, and when the effect is the best, the prenol product contains 57%, and the isoamyl alcohol of the hydrogenation product exceeds 6%. Through impro

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  • Preparation method of isopentenyl alcohol
  • Preparation method of isopentenyl alcohol

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Example Embodiment

[0034] Example 1

[0035] A method for preparing isopentenol is carried out through a synthesis reactor, and includes the following steps:

[0036] Step 1. Weigh the main catalyst and the co-catalyst according to the weight ratio, mix the main catalyst and the co-catalyst uniformly and then stand by, where the weight of 5% Pd / C, tetramethylthiourea and zinc acetate is 1:2:2 ;

[0037] Step 2. Input heat transfer oil into the guide oil layer 21, heat the body 2 to 90°C, open the air inlet 11 and the outlet 12, and input hydrogen into the reactor. When the reactor is full of hydrogen, perform step 1 1.5 kg of the obtained homogeneous mixture of the main catalyst and the co-catalyst is added into the reactor through the catalyst inlet 13, the catalyst inlet 13 is closed, the raw material inlet 14 is opened, and 50 kg of the reaction raw material 3-methyl-3-buten-1-ol is completely added After the reaction kettle, close the raw material inlet 14;

[0038] Step 3: Turn on the condensing ...

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Abstract

The invention discloses a preparation method of isopentenyl alcohol. The preparation method includes: in a hydrogen atmosphere, taking 5% Pd/C as the main catalyst, and in the presence of a cocatalyst, conducting isomeric transformation of the raw material 3-methyl-3-butene-1-ol into isopentenyl alcohol; specifically, mixing the main catalyst and the cocatalyst that are evenly mixed in a weight ratio with the reaction raw material uniformly, carrying out constant temperature heating reaction at 50DEG C-110DEG C for 60-100min, and then ending the reaction. The preparation method of isopentenyl alcohol provided by the invention can well inhibit the generation of the hydrogen reaction product isoamyl alcohol, the yield of the hydrogen reaction product can be inhibited below 7%, and a good effect can be achieved at high temperature, the rise of temperature also changes the balance, so that the content of the target product is increased, and the one-time conversion rate of the raw material is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry, and specifically relates to a preparation method of prenyl alcohol. Background technique [0002] Prenol, namely 3-methyl-2-buten-1-ol, is a colorless transparent liquid with a density of 0.848 and a boiling point of 140°C. It is soluble in organic solvents such as alcohol and ether. It is a synthetic It is an important raw material for products such as citral, vitamin A, vitamin E, etc., and with people's research on the application of prenol, its application scope and demand will also increase significantly, so strengthen the production process of prenol It is of great significance and value to study, improve productivity and reduce production cost. [0003] The synthetic method of isopentenol is more according to different kinds of raw materials, and one of them is to form isopentenol by hydrogen isomerization with 3-methyl-3-buten-1-alcohol as raw material, and this method ...

Claims

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Application Information

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IPC IPC(8): C07C33/03C07C29/56
CPCC07C29/56C07C33/03
Inventor 吴世林邸维龙吴建安
Owner 安徽智新生化有限公司
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