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Method for preparing 3-methyl-3-butene-1-alcohol

A technology of butene and methyl, which is applied in the field of preparation of 3-methyl-3-buten-1-ol, can solve the problems of high production cost and large investment, and achieve production cost reduction, low energy consumption, and conversion high rate effect

Inactive Publication Date: 2011-03-30
SHANGHAI CHENGJIE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is in order to overcome in the preparation method of existing 3-methyl-3-buten-1-alcohol, in addition to needing to carry out under conditions such as high temperature, high pressure, generally require larger production scale, Otherwise, a kind of preparation method of 3-methyl-3-butene-1-alcohol is provided because of the relatively large investment and the high defect of production cost

Method used

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  • Method for preparing 3-methyl-3-butene-1-alcohol

Examples

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Embodiment 1～10

[0030] The general methods of Examples 1-10 are as follows:

[0031] The reaction is carried out in a catalytic distillation equipment, which is composed of an isomerization reactor and a rectification column. The reactor is A 25mm×510mm glass fluidized bed reactor is equipped with a baffle full of small holes and a hydrogen gas distributor at the bottom. The small hole diameter of the baffle and distributor is about 0.01mm, and the raw material inlet and gas distributor are located on the baffle. under. The top of the reactor is connected with a rectification column, the theoretical number of trays of the rectification column is 30, and a condensing reflux device with a discharge port and a vacuum interface is installed on the top of the rectification column.

[0032] 600 grams of prenol is added to the reactor, and then 20 grams of Pd / Al with a particle size of 0.03~0.05mm 2 O 3 The catalyst is added to the reactor, and the catalyst is placed on the baffle. Use a vacuum pump t...

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PUM

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Abstract

The invention discloses a method for preparing a 3-methyl-3-butene-1-alcohol. The method comprises the following step of: performing catalytic isomerization reaction on isoamylene alcohol under the actions of Pd / Al2O3 catalyst and hydrogen to obtain the 3-methyl-3-butene-1-alcohol. The preparation method can greatly reduce the energy consumption, and has the characteristics of low investment and low production cost; and the selectivity of a target product can reach 100 percent, and the conversion rate of the isoamylene alcohol and the purity of the product can reach over 98.5 percent.

Description

Technical field [0001] The invention specifically relates to a preparation method of 3-methyl-3-buten-1-ol. Background technique [0002] 3-Methyl-3-buten-1-ol is a colorless and transparent liquid. In the traditional application field, 3-methyl-3-buten-1-ol is mainly used in the large-scale production of solvents, dyes, surface coatings, pigments, pesticides, pesticides, and citral in industry. The newly developed new use is the raw material for the production of a new generation of polycarboxylic acid series superplasticizers. The polycarboxylic acid high-efficiency water-reducing agent synthesized from the raw material has strong cement particle dispersion retention ability, so that the product has low dosage, high water reduction rate, good reinforcement effect, durability, non-corroding steel bar and environmentally friendly Etc. [0003] The existing technology for producing 3-methyl-3-buten-1-ol is mainly prepared by Prins reaction of isobutene and formaldehyde in the pre...

Claims

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Application Information

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IPC IPC(8): C07C33/025C07C29/56C07C29/80B01J23/44
Inventor 周环
Owner SHANGHAI CHENGJIE IND
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