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3-methyl-3-butenyl-1-alcohol production method

A production method and technology of butene, applied in the direction of organic chemistry, isomerization preparation, etc., can solve the problems of large investment and high production cost

Inactive Publication Date: 2012-03-07
赵明江
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using this process to produce 3-methyl-3-buten-1-ol, in addition to harsh conditions such as high temperature of 250°C and high pressure of 25MPa, usually requires a large scale of production, otherwise due to large investment, the production cost is high

Method used

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Embodiment 1～8

[0014] The isomerization reactor is a φ25mm×1000mm stainless steel tubular reactor, the reaction tubes are respectively filled with φ5mm×5mm spherical palladium-containing catalyst 100ml, and the bottom of the reactor is filled with inert ceramic balls. The catalyst is Pd / SiO 2 , the Pd content is 40%, the rest is carrier, and the bulk density of the catalyst is 0.8g / ml.

[0015] The isopentenol containing organic chlorine is preheated and then pumped into the isomerization reactor from the top at a set rate, hydrogen enters the reactor through a gas distributor, and the raw material and hydrogen are mixed and then enter the catalyst bed for further processing. Isomerization reaction. The space velocity, temperature and hydrogen flow rate of the reaction were adjusted to the set values, and samples were taken from the outlet of the reactor for analysis.

[0016] The reaction conditions of each embodiment are shown in Table 1, and the reaction results are shown in Table 2

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Abstract

The invention discloses a 3-methyl-3-butenyl-1-alcohol production method. The 3-methyl-3-butenyl-1-alcohol production method is characterized in that isoprenol as a raw material undergoes an isomerization reaction in a fixed bed reactor, wherein an isomerization catalyst is Pd / SiO2; Pd content is in a range of 0.3 to 0.8%; a reaction temperature is in a range of 50 to 110 DEG C; reaction pressure is ordinary pressure; a molar ratio of hydrogen to isoprenol is in a range of 0.1 to 0.5; a mass space velocity is in a range of 2 to 5h<-1>; and organic chlorine content of isoprenol is in a range of 3 to 10ppm. Compared with the existing 3-methyl-3-butenyl-1-alcohol production method, the 3-methyl-3-butenyl-1-alcohol production method provided by the invention solves the problems that the existing 3-methyl-3-butenyl-1-alcohol production method has a high raw material consumption rate and a high production cost and can cause severe environmental pollution, and has the advantages of simple processes, abundant raw material sources, low production cost, high reaction yield and low pollution on the environment.

Description

technical field [0001] The invention relates to a production method of 3-methyl-3-buten-1-ol, in particular to the addition reaction of isoprene and hydrogen chloride to prepare chlorinated isopentene, and the chlorinated isopentene is directly hydrolyzed without refining Production of isopentenol and methyl butenol, the method of producing 3-metha-3-buten-1-ol through catalytic isomerization reaction of isopentenol. Background technique [0002] 3-Methyl-3-buten-1-ol is a colorless transparent liquid. In the traditional field of application, 3-methyl-3-buten-1-ol is mainly used in large-scale citral and its downstream products in industry, and its new use is for the new generation of polycarboxylic acid series of high-efficiency water reduction Raw materials for the production of agents. The polycarboxylate high-efficiency superplasticizer synthesized with this raw material has a strong ability to maintain the dispersion of cement particles, so that the product has low do...

Claims

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Application Information

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IPC IPC(8): C07C33/025C07C29/56
Inventor 赵明江赵明军孟勤标商志才
Owner 赵明江
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