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Method for producing epichlorohydrin

A technology of epichlorohydrin and chloropropene, which is applied in the direction of organic chemistry, etc., can solve the problems of low utilization rate of raw materials, easy decomposition of peroxides when heated, and danger of explosion.

Active Publication Date: 2019-01-25
CHINA PETROLEUM & CHEM CORP +1
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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 that in the prior art, peroxides are easily decomposed by heating, resulting in low utilization rate of raw materials and the risk of explosion. A new method for producing epichlorohydrin is provided.

Method used

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  • Method for producing epichlorohydrin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] use figure 1 As shown in the flow process, 2 tank reactors are used in series, and the fresh chloropropene with a flow rate of 1.7 kg / h is mixed with a homogeneous molybdenum-based catalyst with a flow rate of 3.3 g / h, and enters from the top of the reactor 1. Discharge V from reactor 2 2 After splitting out 30% of the 'middle split and flow rate and containing 50% ethylbenzene hydroperoxide, the ethylbenzene solution is mixed and enters from the top inlet of the reactor 1.

[0041] The weight ratio of molybdenum to ethylbenzene hydroperoxide is 0.00005, and allyl chloride: ethylbenzene hydroperoxide=3 (molar ratio).

[0042] The reaction temperature of the reactor 1 is 30° C., the reaction pressure is 0.1 MPa, and the conversion rate of ethylbenzene hydroperoxide is 50%.

[0043] The reaction temperature of the reactor 2 is 50° C., the reaction pressure is 0.1 MPa, and the conversion rate of ethylbenzene hydroperoxide is 100%.

[0044] Results: The selectivity of ep...

Embodiment 2

[0046] use figure 1 As shown in the flow process, 4 tank reactors are used in series, and the fresh chloropropene with a flow rate of 2.5 kg / h is mixed with a homogeneous molybdenum-based catalyst with a flow rate of 6.7 g / h, and enters from the top of the reactor 1. From the last reactor discharge V4 ', branch out 40% and flow be that 2 kilograms / hour contain the cumene solution of 50% cumene hydroperoxide to mix and then enter from the top inlet of reactor 1.

[0047] The weight ratio of molybdenum and cumene hydroperoxide is 0.0001, and allyl chloride: cumene hydroperoxide=5 (mol ratio).

[0048] The reaction temperature of the reactor 1 is 30° C., the reaction pressure is 0.3 MPa, and the conversion rate of cumene hydroperoxide is 30%.

[0049] The reaction temperature of the reactor 2 is 40° C., the reaction pressure is 0.3 MPa, and the conversion rate of cumene hydroperoxide is 60%.

[0050] The reaction temperature of the reactor 3 is 50° C., the reaction pressure is ...

Embodiment 3

[0054] use figure 1 As shown in the flow process, 5 reactors are used in series, and the fresh chloropropene with a flow rate of 3.92 kg / h is mixed with a homogeneous molybdenum-based catalyst with a flow rate of 20 g / h, and enters the reactor from the top of the reactor 1. Discharge V from the last reactor 5 50% of the split flow out of ' is mixed with the ethylbenzene solution containing 50% ethylbenzene hydroperoxide with a flow rate of 2 kg / h and enters from the top inlet of the reactor 1.

[0055] The weight ratio of molybdenum to ethylbenzene hydroperoxide is 0.0003, and allyl chloride: ethylbenzene hydroperoxide=7 (molar ratio).

[0056] The reaction temperature of the reactor 1 is 30° C., the reaction pressure is 0.7 MPa, and the conversion rate of ethylbenzene hydroperoxide is 35%.

[0057] The reaction temperature of the reactor 2 is 50° C., the reaction pressure is 0.7 MPa, and the conversion rate of ethylbenzene hydroperoxide is 55%.

[0058] The reaction temper...

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Abstract

The invention relates to a method used for producing epoxy chloropropane. The method is used for solving problems of the prior art that thermal decomposition by heating of peroxides is easily caused, so that raw material utilization efficiency is low, and explosion may be caused. According to the method, in the presence of a homogeneous molybdenum-based catalyst, epoxy chloropropane is prepared from an organic peroxide and chloropropene. The method comprises following steps: a) a reaction device comprising n reaction kettles connected in series is provided; b) a material flow A containing fresh chloropropene, a material flow B containing the organic peroxide, and a material flow C containing the homogeneous molybdenum-based catalyst are delivered into the reaction device through the inlet of a first reaction kettle; c) from the first reaction kettle to the (n-1)th reaction kettle, a flow material obtained via a former reaction kettle is delivered into a next reaction kettle via the inlet of the reaction kettle, and a material flow Vn is obtained via the outlet of the n-th reaction kettle; and d) a part (Vn') of the material flow Vn is recycled into the first reaction kettle via the inlet of the first reaction kettle, and the rest Vn'' is subjected to refining separation so as to obtain finished product epoxy chloropropane. The method can be applied to industrial production of epoxy chloropropane.

Description

technical field [0001] The present invention relates to a method for producing epichlorohydrin. Background technique [0002] Epichlorohydrin is also known as epichlorohydrin, and its chemical name is 3-chloro-l,2-propylene oxide. It is an important organic chemical raw material and synthetic intermediate. Among epoxy compounds, the output of epichlorohydrin is second only to ethylene oxide and propylene oxide, ranking third. Epichlorohydrin can be used as a solvent for cellulose esters, resins and cellulose ethers, and is also used in the production of surfactants, medicines, pesticides, coatings, adhesives, ion exchange resins, plasticizers, glycerin derivatives and glycidol derivatives The raw material of things. Various epoxy resins prepared by epichlorohydrin and bisphenol A have the characteristics of strong adhesion, small shrinkage, chemical corrosion resistance, and good stability, and are widely used as coatings, adhesives, reinforcing materials, and casting mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D303/08C07D301/19
Inventor 杨洪云高焕新金国杰黄政丁琳康陈军
Owner CHINA PETROLEUM & CHEM CORP
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