CN107674045A - A kind of method for producing epichlorohydrin - Google Patents
A kind of method for producing epichlorohydrin Download PDFInfo
- Publication number
- CN107674045A CN107674045A CN201711005871.2A CN201711005871A CN107674045A CN 107674045 A CN107674045 A CN 107674045A CN 201711005871 A CN201711005871 A CN 201711005871A CN 107674045 A CN107674045 A CN 107674045A
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- product
- phase
- splitter
- dichlorohydrin
- organic phase
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
- C07D303/02—Compounds containing oxirane rings
- C07D303/08—Compounds containing oxirane rings with hydrocarbon radicals, substituted by halogen atoms, nitro radicals or nitroso radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/27—Condensation of epihalohydrins or halohydrins with compounds containing active hydrogen atoms
- C07D301/28—Condensation of epihalohydrins or halohydrins with compounds containing active hydrogen atoms by reaction with hydroxyl radicals
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Epoxy Compounds (AREA)
Abstract
A kind of method for producing epichlorohydrin of the invention, first dichlorohydrin dehydrochlorination, then epichlorohydrin generation, wherein, the preparation method of dichlorohydrin is：Glycerine is set to be reacted with hydrochloride aqueous solution in the environment of it catalyst be present first, and produce the first reaction product, then the first charging from the first reaction product is made to enter the first destilling tower containing the first phase-splitter, and produce the first overhead product and the first tower bottom product, finally make to enter the first phase-splitter after the first overhead product is condensed, and the first waterworks are directly connected to first phase-splitter, and the first water-phase product and the first organic phase product are formed in the first phase-splitter, wherein the first organic phase product includes dichlorohydrin；And take out and state the first organic phase product, the present invention solves the problems, such as that the method environmental pollution that epichlorohydrin is produced present in prior art is serious and the wasting of resources is larger.
Description
Technical field
The invention belongs to produce organic compound technical field, and in particular to a kind of method for producing epichlorohydrin.
Background technology
The known natural oil product resource obtained from the earth is limited such as oil or natural gas, and these resources are used at present
In production fuel, it is used to produce various organic compounds as starting material, then purification process but needs to spend larger generation
Valency, the main preparation methods of dichlorohydrin (dichloropropanol) are propylene (propene) high-temperature chlorination at present, and it is wrapped
Containing two steps：Make acrylonitrile-chlorinated generation allyl chlorine (allyl chloride) at high temperature, and use excessive industrial water,
Allyl chlorine is set to form dichlorohydrin with chlorination reaction.However, using propylene high-temperature chloridising can produce a large amount of waste water with it is other
Waste material, thus cause technology and environmentally the problem of.
Therefore, a kind of directly react in the case of catalyst with chlorinating agent using glycerine (glycerol) is developed to produce
The method of dichlorohydrin, the method will not produce a large amount of waste water and waste material, therefore be a kind of more economical and environmentally friendly manufacture method.
However, when preparing dichlorohydrin using the method, the azeotropic mixture (azeotrope) of dichlorohydrin and water can be formed,
If add extractant (extractant) obtains dichlorohydrin with separating azeotrope, manufacturing cost, and extractant will be improved
Azeotropic mixture may be formed with catalyst and cause difficulty of the catalyst on recycling.
The content of the invention
It is an object of the invention to provide a kind of method for producing epichlorohydrin, solve and produced present in prior art
The problem of method environmental pollution of epichlorohydrin is seriously and the wasting of resources is larger.
The technical solution adopted in the present invention is a kind of method for producing epichlorohydrin, specifically real according to following steps
Apply：
Step 1, dichlorohydrin dehydrochlorination；
Step 2, epichlorohydrin generation.
The features of the present invention also resides in,
The preparation method of dichlorohydrin is as follows：
Step 1, glycerine and hydrochloride aqueous solution is reacted in the environment of it catalyst be present, and produce the first reaction
Product；
Step 2, the first charging from the first reaction product is entered the first destilling tower containing the first phase-splitter, and produce
Raw first overhead product and the first tower bottom product；
Step 3, make to enter the first phase-splitter after the first overhead product is condensed, and the first waterworks are directly connected to
First phase-splitter, and the first water-phase product and the first organic phase product are formed in the first phase-splitter, wherein first is organic
Phase product includes dichlorohydrin；And take out and state the first organic phase product.
First reactor includes flow reactor in step 1.
Catalyst is adipic acid in step 1.
First reaction product includes dichlorohydrin and a chloropropyl alcohol in step 1.
First water-phase product includes hydrochloride aqueous solution in step 3.
First organic phase product also includes a chloropropyl alcohol in step 3.
The invention has the advantages that a kind of method for producing epichlorohydrin, by using phase-splitter separating azeotrope
And dichlorohydrin is taken out, it can avoid additionally adding extractant and manufacturing cost being reduced.Further, since without using extractant,
Therefore the problem of extractant can be avoided to be likely to form azeotropic mixture with catalyst and cause catalyst to be difficult to recycle.It is in addition, logical
Hydrochloride aqueous solution concentration in phase-splitter can directly be adjusted by crossing waterworks, and will be condensed after destilling tower overhead product
Split-phase is effectively carried out, smoothly to obtain dichlorohydrin.
Embodiment
With reference to embodiment, the present invention is described in detail.
A kind of method for producing epichlorohydrin of the invention, specifically implements according to following steps：
Step 1, dichlorohydrin dehydrochlorination；
Step 2, epichlorohydrin generation.
Wherein, the preparation method of dichlorohydrin is as follows：
Step 1, glycerine and hydrochloride aqueous solution is reacted in the environment of it catalyst be present, and produce the first reaction
Product, wherein, first reactor includes flow reactor, and catalyst is adipic acid, and the first reaction product includes dichlorohydrin
With a chloropropyl alcohol.
Step 2, the first charging from the first reaction product is entered the first destilling tower containing the first phase-splitter, and produce
Raw first overhead product and the first tower bottom product；
Step 3, make to enter the first phase-splitter after the first overhead product is condensed, and the first waterworks are directly connected to
First phase-splitter, and the first water-phase product and the first organic phase product are formed in the first phase-splitter, wherein first is organic
Phase product includes dichlorohydrin；And take out and state the first organic phase product, wherein, it is water-soluble that the first water-phase product includes hydrogen chloride
Liquid, the first organic phase product also include a chloropropyl alcohol.
Claims (7)
- A kind of 1. method for producing epichlorohydrin, it is characterised in that specifically implement according to following steps：Step 1, dichlorohydrin dehydrochlorination；Step 2, epichlorohydrin generation.
- A kind of 2. method for producing epichlorohydrin according to claim 1, it is characterised in that the system of the dichlorohydrin Preparation Method is as follows：Step 1, glycerine and hydrochloride aqueous solution is reacted in the environment of it catalyst be present, and produce the first reaction production Thing；Step 2, the first charging from first reaction product is entered the first destilling tower containing the first phase-splitter, and produce Raw first overhead product and the first tower bottom product；Step 3, enter first phase-splitter after making first overhead product condensed, and the first waterworks are directly connected First phase-splitter is connected to, and the first water-phase product and the first organic phase product are formed in first phase-splitter, wherein First organic phase product includes dichlorohydrin；And take out and state the first organic phase product.
- 3. a kind of method for producing epichlorohydrin according to claim 2, it is characterised in that first in the step 1 Reactor includes flow reactor.
- 4. a kind of method for producing epichlorohydrin according to claim 2, it is characterised in that be catalyzed in the step 1 Agent is adipic acid.
- 5. a kind of method for producing epichlorohydrin according to claim 2, it is characterised in that first in the step 1 Reaction product includes dichlorohydrin and a chloropropyl alcohol.
- 6. a kind of method for producing epichlorohydrin according to claim 2, it is characterised in that first in the step 3 Water-phase product includes hydrochloride aqueous solution.
- 7. a kind of method for producing epichlorohydrin according to claim 2, it is characterised in that first in the step 3 Organic phase product also includes a chloropropyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711005871.2A CN107674045A (en) | 2017-10-25 | 2017-10-25 | A kind of method for producing epichlorohydrin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711005871.2A CN107674045A (en) | 2017-10-25 | 2017-10-25 | A kind of method for producing epichlorohydrin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107674045A true CN107674045A (en) | 2018-02-09 |
Family
ID=61141891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711005871.2A Pending CN107674045A (en) | 2017-10-25 | 2017-10-25 | A kind of method for producing epichlorohydrin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107674045A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106397123A (en) * | 2015-07-31 | 2017-02-15 | 王圣洁 | Method for producing dichloropropanol and method for producing epichlorohydrin |
| CN106397122A (en) * | 2015-07-31 | 2017-02-15 | 王圣洁 | Method for preparing dichloropropanol and epichlorohydrin by using glycerol as raw material |
| CN106892798A (en) * | 2015-12-18 | 2017-06-27 | 长春人造树脂厂股份有限公司 | Process for preparing dichloropropanol |
-
2017
- 2017-10-25 CN CN201711005871.2A patent/CN107674045A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106397123A (en) * | 2015-07-31 | 2017-02-15 | 王圣洁 | Method for producing dichloropropanol and method for producing epichlorohydrin |
| CN106397122A (en) * | 2015-07-31 | 2017-02-15 | 王圣洁 | Method for preparing dichloropropanol and epichlorohydrin by using glycerol as raw material |
| CN106892798A (en) * | 2015-12-18 | 2017-06-27 | 长春人造树脂厂股份有限公司 | Process for preparing dichloropropanol |
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Application publication date: 20180209 |