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Preparation method of allyl alcohol by utilizing allyl acetate

A technology of propylene acetate and allyl alcohol, applied in chemical instruments and methods, preparation of oxygen-containing compounds, preparation of organic compounds, etc., can solve the problems of lower yield and disadvantages

Inactive Publication Date: 2013-10-16
TAICANG HENGYI MEDICINE CHEM MATERIAL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrolysis reaction is usually catalyzed by a strong acid resin, but since the ester hydrolysis reaction itself is a reversible reaction, the acetic acid and strong acid catalyst produced in the system are not conducive to the positive direction of the reaction, thereby reducing the yield.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The qualitative and quantitative detection methods of reaction substrates and products are as follows: using SE-54 (30 m×0.25 mm×0.5 μm) quartz capillary column, the temperature of the vaporization chamber is 200 °C; the temperature of the column is 100 °C; the temperature of the FID detector is 280 °C; the carrier gas: High purity N 2 ; Column flow rate: 0.9 mL / min; Split ratio: 70:1.

[0014] Propylene acetate and water mixed in a molar ratio of 1:1 were added to the reaction kettle, and sodium hydroxide was used as a catalyst, heated to a reaction temperature of 60 °C, and vigorously stirred for 1 h. The reaction solution is distilled under atmospheric pressure to obtain high-purity allyl alcohol with a yield of 93.8%.

Embodiment 2

[0016] Reaction substrate and product qualitative and quantitative detection method and operation are all the same as in Example 1, and the implementation steps of changing the reactant molar ratio and each operating parameter are as follows:

[0017] Propylene acetate and water mixed in a molar ratio of 1:3 were added to the reaction kettle, and potassium hydroxide was used as a catalyst, heated to a reaction temperature of 75 °C, and the reaction was vigorously stirred for 4 h. The reaction solution is distilled under atmospheric pressure to obtain high-purity allyl alcohol with a yield of 95.2%.

Embodiment 3

[0019] Reaction substrate and product qualitative and quantitative detection method and operation are all the same as in Example 1, and the implementation steps of changing the reactant molar ratio and each operating parameter are as follows:

[0020] Propylene acetate and water mixed in a molar ratio of 1:9 were added to the reaction kettle, and sodium hydroxide was used as a catalyst, heated to a reaction temperature of 90 °C, and vigorously stirred for 6 h. The reaction solution is distilled under atmospheric pressure to obtain high-purity allyl alcohol with a yield of 94.4%.

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PUM

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Abstract

The invention relates to a preparation method of allyl alcohol by utilizing allyl acetate, and mainly solves the problem of low ester hydrolysis conversion rate in the chloropropylene oxide production process in the prior art. The preparation method adopts allyl acetate and water as the raw materials and strong base as the catalyst, the raw materials are heated to the reaction temperature, and reactions happen under strong stirring. In the reactions, the strong base is not only a catalyst, but also an acid-bonding agent in the reaction system. The strong base makes the equilibrium move in the positive direction and improves the conversion rate of allyl acetate. Thus, low energy consumption, simple and rapid production is realized. The reaction liquid is subjected to a normal pressure distillation process, and the yield of obtained allyl alcohol is larger than 93%.

Description

technical field [0001] The invention relates to a method for preparing allyl alcohol by using propylene acetate, and relates to the preparation technology of epichlorohydrin in the chemical industry. Background technique [0002] Epichlorohydrin is an important organic chemical raw material and fine chemical product, mainly used in the production of epoxy resin, reinforced resin, water treatment resin, synthetic glycerin (accounting for 10% to 15% of demand) and elastomer, etc. A small amount is used in the preparation of glycidyl ethers and esters. At the same time, it is also used to produce coatings, adhesives, reinforcing materials and casting materials, to produce sealing materials and oil hoses used in the automotive industry and aviation industry, and to produce raw materials for chemical stabilizers, chemical fuels and water treatment agents. [0003] At present, the production process of epichlorohydrin is mainly propylene high-temperature chlorination method and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C33/03C07C27/02
Inventor 倪明前
Owner TAICANG HENGYI MEDICINE CHEM MATERIAL FACTORY