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Production method of epoxy chloropropane

A technology of epichlorohydrin and its production method, which is applied in the direction of chemical instruments and methods, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve the problems of reducing the cost of catalyst use, reducing catalyst activity, and low catalyst activity, so as to reduce the use of Cost and operating expenses, enhanced activity stability, simple process effect

Active Publication Date: 2010-06-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, US4824976 discloses a kind of method that adds suitable acid neutralizing agent before reaction or in reaction process, and this method has improved the selectivity of epichlorohydrin to a certain extent, but, the activity of catalyst after processing is obvious to lower
[0004] CN1711253A discloses a method of controlling the pH value of 3-chloropropene and hydrogen peroxide epoxidation reaction medium between 3-4 to improve the selectivity of epichlorohydrin, which also has low catalyst activity and deactivation Disadvantages of high speed and short one-way use time
[0005] Due to the high price of the titanium-silicon molecular sieve catalyst and the short one-way use time, it is necessary to increase the use time of the catalyst by frequently regenerating the catalyst, reduce the use cost of the catalyst, and increase the complexity and cost of the operation process, making the method economical. Difficult to meet the requirements of industrial production

Method used

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  • Production method of epoxy chloropropane
  • Production method of epoxy chloropropane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Add 0.036% ammonia of 3-chloropropene mass in the reaction raw material, and the reaction temperature starts from 50°C and gradually increases to 70°C at a heating rate of 0.044°C / hour. The result of the epoxidation reaction of 3-chloropropene and hydrogen peroxide See Table 1.

[0047] Table 1

[0048] Reaction time / h

Embodiment 2

[0050] Add 0.076% methylamine of 3-chloropropene quality in the reaction raw material, the reaction temperature starts from 55 DEG C and gradually raises to 75 DEG C with the heating rate of 0.052 DEG C / hour, the epoxidation reaction of 3-chloropropene and hydrogen peroxide The results are shown in Table 2.

[0051] Table 2

[0052] Reaction time / h

[0053] Reaction time / h

Embodiment 3

[0055] Add 0.11% ammonium carbonate of 3-chloropropene quality in the reaction raw material, the reaction temperature starts from 45 DEG C and gradually increases to 65 DEG C with the heating rate of 0.057 DEG C / hour, the epoxidation reaction of 3-chloropropene and hydrogen peroxide The results are shown in Table 3.

[0056] table 3

[0057] Reaction time / h

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Abstract

The invention relates to a production method of epoxy chloropropane. The method provided in the invention comprises contacting 3-chloropropene with hydrogen peroxide with existence of titanium silicalite molecular sieve catalyst, alkaline additive and solvent, wherein, the temperature of contact between 3-chloropropene and hydrogen peroxide is raised from 10-55 DEG C to 65-100 DEG C, and the temperature raising velocity is 0.02-1 DEG C / h. Compared with the prior art, the method for producing epoxy chloropropane provided in the invention greatly enhances activity stability of catalyst, obviously reduces use cost and operation expenditure of catalyst; the technique process is simple and the implementation is convenient.

Description

technical field [0001] The present invention relates to a production method of epichlorohydrin, more specifically, the present invention relates to a method for producing epichlorohydrin through the reaction of 3-chloropropene and hydrogen peroxide. Background technique [0002] Epichlorohydrin is a basic organic chemical raw material. The current production methods of epichlorohydrin include propylene high-temperature chlorination method and allyl acetate method. Since these two processes contain chlorohydrinization and saponification processes, there are serious environmental protection problems such as large wastewater discharge and difficult waste residue treatment. At the same time, there are also defects such as serious corrosion, many by-products, and high material consumption. It is urgent to develop clean and efficient epoxy resins. Chloropropane production technology. [0003] In the late 1980s, US4833260 disclosed a method for direct epoxidation of 3-chloroprope...

Claims

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Application Information

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IPC IPC(8): C07D301/12C07D303/08B01J29/89
Inventor 张永强杜泽学刘易陈艳凤
Owner CHINA PETROLEUM & CHEM CORP
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