CN209602410U - A kind of industrial production device of 2,5- dimethyl -2,5-HD - Google Patents
A kind of industrial production device of 2,5- dimethyl -2,5-HD Download PDFInfo
- Publication number
- CN209602410U CN209602410U CN201920039396.9U CN201920039396U CN209602410U CN 209602410 U CN209602410 U CN 209602410U CN 201920039396 U CN201920039396 U CN 201920039396U CN 209602410 U CN209602410 U CN 209602410U
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- receiving slit
- neutralization reaction
- pipeline
- potassium carbonate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses one kind 2,5- dimethyl -2, the industrial production device of 5- hexylene glycol, belong to chemical production technical field, including ethynylation device, neutralization reaction device, carbon dioxide storage tank, potash salt receiving slit, buck receiving slit, potassium carbonate dry recyclable device and the oily mutually pump etc. of benzole soln；Using the process units of the utility model, can using carbon dioxide substitution hydrogen chloride in and potassium hydroxide, the carbon dioxide usage amount of 1 ton of DHAG alcohol of every production is 35 kilograms, nearly 80 yuan of cost, but do not have particular/special requirement to production equipment, there is no extra erosion to equipment, frequent more exchange device is not needed, and generated potassium carbonate can be used as by-product utilization after reaction, recessive negative cost is very big, environment is not also polluted, environmental protection effect and economic benefit are all greatly improved.
Description
Technical field
The utility model relates to chemical production technical fields, more particularly to the work of one kind 2,5- dimethyl -2,5- hexylene glycol
The environmentally protective process units of industryization.
Background technique
2,5- dimethyl -2,5- hexylene glycols, abbreviation DHAG are a kind of important industrial chemicals.So far, 2,5- are produced
The enterprise of dimethyl-2,5-hexylene glycol is seldom, and only 3 main scale enterprise objects are domestic in Sichuan Province's Luzhou City in the whole world,
Including the applicant, 5,000 ton is produced per year；Luzhou Fu Bang chemical company produces 2,000 ton per year.There are also other a small number of enterprises such as
Sichuan Yibin Heng De Chemical Co., Ltd. produces this product, but scale is smaller.
The method of production 2,5- dimethyl -2,5- hexylene glycol is general at present are as follows: first using benzene as solvent, potassium hydroxide is catalyzed
Agent, by acetylene and acetone to be primary raw material under the conditions of normal pressure and certain temperature carry out ethynylation condensation reaction is made DHAG (2,
5- dimethyl -2,5- hexylene glycol) intermediate product hexin glycol, then again by hexin glycol catalytic hydrogenation be made DHAG.In life
During production, to neutralize potassium hydroxide, the dosage of hydrochloric acid is big, and the potassium hydroxide dosage of 1 ton of DHAG of every production is 1.13 tons, cost
Nearly 10,000 yuan, and in order to neutralize potassium hydroxide, hydrochloric acid dosage is 0.2 ton, 40 yuan of hydrochloric acid cost；
In addition, existing adopt the method that potassium hydroxide is neutralized with hydrochloric acid, have the disadvantage in that firstly, being generated after neutralizing big
The potassium chloride waste of amount is not easy to handle；Then, since hydrochloric acid belongs to the article of easy drugs processed, control is tighter, in addition hydrochloric acid ratio
It is great, corrosivity is strong；Due also to hydrogen chloride gas has extremely strong volatility, and it is strong to equipment pipe inner wall corrosion, cause to set
Standby service life is short；During in hexylene glycol actual production, pipeline uses the pipeline of liner tetrafluoro, and cost is common pipe
2 times；Equipment uses enamel equipment, and cost is also nearly 3 times of ordinary carbon steel equipment；The replacement cycle of equipment pipe still relatively frequency
It is numerous.
That is to say, semi-finished product yield is unstable, and raw materials consumption is higher although hydrochloric acid direct cost is 40 yuan/ton of DHAG,
It is handled using by-product caused by hydrochloric acid, equipment corrodes the invisible costs such as replacement height.
In order to reduce cost, present applicant has done many effort, such as the CN201310285157.9 applied,
Method is after a large amount of potassium hydroxide aqueous solutions during producing hexylene glycol separate and recover in kettle, will to neutralize kettle with hydrochloric acid
Remaining potassium hydroxide carries out neutralization reaction in interior semi-finished product, to reduce costs to a certain extent；But it still uses
To a small amount of hydrochloric acid.
Existing manufacturer is all made of in hydrochloric acid and potassium hydroxide process, mating corresponding production equipment.
Utility model content
The purpose of this utility model is to provide the industrial production device of one kind 2,5- dimethyl -2,5- hexylene glycol, with
It solves the above problems, the technical solution of use are as follows: including ethynylation device, neutralization reaction device, carbon dioxide storage tank, carbonic acid
Sylvite receiving slit, buck receiving slit, potassium carbonate drying recyclable device are mutually pumped with benzole soln oil, wherein the ethynylation device
Bottom is connect at the top of neutralization reaction device by pipeline, and the carbon dioxide storage tank and neutralization reaction bottom of device pass through pipeline
Connection, the potash salt receiving slit and buck receiving slit are also connect with the neutralization reaction bottom of device by pipeline, described
Mutually pump is connect by pipeline with neutralization reaction bottom of device benzole soln oil；The potash salt receiving slit and potassium carbonate drying are recycled
Device connects, and is provided with valve on the pipeline.
As a preferred technical scheme: carbon dioxide decompressor and titanium dioxide are additionally provided on the carbon dioxide storage tank
Carbon pressure relief device.Carbon dioxide pressure relief device is arranged to be conducive to guarantee the safety of carbon dioxide storage tank；Carbon dioxide is set and depressurizes dress
It sets and is conducive to carbon dioxide being passed through neutralization reaction device.
As a preferred technical scheme: being additionally provided with air-introduced machine on the potassium carbonate drying recyclable device.
The method for using above-mentioned process units to be produced: including using benzene as solvent, potassium hydroxide makees catalyst, by acetylene
It is that primary raw material carries out the obtained hexin glycol of ethynylation, then carries out catalytic hydrogenation reaction with acetone, after the ethynylation, object
Material carries out neutralization reaction to potassium hydroxide using carbon dioxide.
The utility model can carry out neutralization reaction using carbon dioxide and potassium hydroxide and obtain potassium carbonate, existing to substitute
Reacted with potassium hydroxide using hydrogen chloride.Preferably carbon dioxide gas is stored in the titanium dioxide with safe pressure relief device protection
In carbon storage tank, such as neutralized in the portion of bottom by being passed through neutralization reaction device by pipeline after carbon dioxide decompressor, cooperation is stirred
Operation is mixed, pressure controls within 0.09MPa, and carbon dioxide is made mutually to carry out neutralizing instead with the benzene oil containing a small amount of potassium hydroxide
It answers, the pH of benzene oil phase is finally made to reach 6.0-7.0 to meet the requirement for producing DHAG.Generated potassium carbonate is in reaction
It is discharged in potassium carbonate collecting tank and stores with bottom portion, be used for glass, printing and dyeing, fertilizer after Collection utilization drying recyclable device processing
Soap, enamel prepare sylvite, synthesis ammonia decarbonylation, are also used for the purposes such as colour television set industry.
As a preferred technical scheme: the carbon dioxide enters from the bottom of material.
As a preferred technical scheme: the carbon dioxide being passed through is so that it is standard that the pH of benzene phase, which reaches 6.0-7.0,.
As a preferred technical scheme: the product potassium carbonate of the neutralization reaction is discharged from the bottom for neutralizing reaction vessel and receives
Collection, and dry recycling.
Compared with the prior art, the advantages of the utility model are: the device of the utility model can use carbon dioxide
It substitutes in hydrogen chloride and potassium hydroxide, the carbon dioxide usage amount of 1 ton of DHAG alcohol of every production is 35 kilograms, nearly 80 yuan of cost, but right
Production equipment does not have particular/special requirement, does not have extra erosion to equipment, does not need frequent more exchange device, and generated after reaction
Potassium carbonate can be used as by-product utilization, and recessive negative cost is very big, environment also not polluted, environmental protection effect and economic benefit
All it is greatly improved.
Detailed description of the invention
Fig. 1 is the process units schematic diagram of the utility model embodiment；
1, ethynylation kettle；2, neutralization reaction kettle；21, blow-down pipe；3, carbon dioxide storage tank；31, carbon dioxide decompression dress
It sets；32, carbon dioxide pressure relief device；4, potash salt receiving slit；5, buck receiving slit；6, potassium carbonate dries recyclable device；61,
Air-introduced machine；7, benzole soln oil mutually pumps；A, oil mutually goes concentration kettle.
Specific embodiment
Below in conjunction with embodiment, the utility model is described in further detail.
Embodiment:
The industrial production device of one kind 2,5- dimethyl -2,5- hexylene glycol, as shown in Figure 1: include ethynylation kettle 1,
Neutralization reaction kettle 2, carbon dioxide storage tank 3, potash salt receiving slit 4, buck receiving slit 5, potassium carbonate drying recyclable device 6 and benzene
Solution oil mutually pumps 7, and 2 upper end of neutralization reaction kettle is additionally provided with blow-down pipe 21；Two are additionally provided on the carbon dioxide storage tank 3
Carbonoxide decompressor 31 and carbon dioxide pressure relief device 32, the potassium carbonate dry and are additionally provided with air-introduced machine on recyclable device 6
61；Wherein, 1 bottom of ethynylation kettle is connect at the top of neutralization neutralization reaction kettle 2 by pipeline, the carbon dioxide storage tank
3 are connect with 2 bottom of neutralization reaction kettle by pipeline, and the potash salt receiving slit 4 and buck receiving slit 5 also neutralize instead with described
2 bottom of kettle is answered to connect by pipeline, mutually pump 7 is connect by pipeline with 2 bottom of neutralization reaction kettle the benzole soln oil；The carbonic acid
Sylvite receiving slit 4 is connect with potassium carbonate drying recyclable device 6, is provided with valve on the pipeline.
Process units in the present invention, the structure of building block are all the prior arts, including including frame type stirring ethynylation
Reaction kettle 1, enamel neutralization reaction kettle 2 are all traditional the structure that DHAG is used, carbon dioxide to be prepared using ethynylation condensation reaction
Although spring decompressor 31 and the sensor-type pressure relief device 32 of pressure carbon dioxide be the present invention carry out preparation DHAG it is stylish
The device used, still, carbon dioxide spring decompressor 31 and the sensor-type pressure relief device 32 of pressure carbon dioxide are also to belong to
It in existing structure, is only never used to prepare in the device of DHAG, wherein carbon dioxide spring decompressor 31 belongs to dioxy
Change one kind of carbon pressure reducer, effect is protected when the inlet pressure of carbon dioxide horizontal tank and rate of discharge change
It demonstrate,proves its outlet pressure and remains stable always；The sensor-type pressure relief device 32 of pressure carbon dioxide includes pressure sensor and valve etc.,
When pressure sensor detects that pressure is excessive, valve pressure release is opened, to guarantee safety.
The industrialized preparing process of one kind 2,5- dimethyl -2,5- hexylene glycol, using above-mentioned process units, step packet
It including using benzene as solvent, it is that primary raw material carries out the obtained hexin glycol of ethynylation by acetylene and acetone that potassium hydroxide, which makees catalyst,
Carry out catalytic hydrogenation reaction again, after the ethynylation, material carries out neutralization reaction to potassium hydroxide using carbon dioxide；Pass through
It is passed through in 2 bottom of neutralization reaction kettle after carbon dioxide decompressor 31 by pipeline, preferably cooperation stirring operation, pressure control exists
Within 0.09MPa, so that carbon dioxide is mutually carried out neutralization reaction with the benzene oil containing a small amount of potassium hydroxide, finally make the pH of benzene oil phase
Reach 6.0-7.0 to meet the requirement for producing DHAG；The product potassium carbonate of the neutralization reaction from neutralize reaction kettle 2 bottom
It is discharged into potash salt receiving slit 4, subsequently into the potassium carbonate drying drying recycling potassium carbonate of recyclable device 6；Neutralization reaction kettle 2
Water phase after reaction enters buck receiving slit, and benzene oil mutually removes concentration kettle A under the action of benzole soln oil mutually pump 7.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (3)
1. one kind 2, the industrial production device of 5- dimethyl -2,5- hexylene glycol, which is characterized in that including ethynylation device,
Neutralization reaction device, carbon dioxide storage tank, potash salt receiving slit, buck receiving slit, potassium carbonate drying recyclable device and benzene are molten
Liquid oil mutually pumps, wherein the ethynylation bottom of device is connect at the top of neutralization reaction device by pipeline, the carbon dioxide
Storage tank is connect with neutralization reaction bottom of device by pipeline, the potash salt receiving slit and buck receiving slit also with the neutralization
Reaction unit bottom is connected by pipeline, and mutually pump is connect by pipeline with neutralization reaction bottom of device the benzole soln oil；It is described
Potash salt receiving slit is connect with potassium carbonate drying recyclable device, is provided with valve on the pipeline.
2. process units according to claim 1, it is characterised in that: be additionally provided with titanium dioxide on the carbon dioxide storage tank
Carbon decompressor and carbon dioxide pressure relief device.
3. process units according to claim 1, it is characterised in that: be additionally provided on the potassium carbonate drying recyclable device
Air-introduced machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920039396.9U CN209602410U (en) | 2019-01-08 | 2019-01-08 | A kind of industrial production device of 2,5- dimethyl -2,5-HD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920039396.9U CN209602410U (en) | 2019-01-08 | 2019-01-08 | A kind of industrial production device of 2,5- dimethyl -2,5-HD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209602410U true CN209602410U (en) | 2019-11-08 |
Family
ID=68398963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920039396.9U Active CN209602410U (en) | 2019-01-08 | 2019-01-08 | A kind of industrial production device of 2,5- dimethyl -2,5-HD |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209602410U (en) |
-
2019
- 2019-01-08 CN CN201920039396.9U patent/CN209602410U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107915644B (en) | A method of p-aminophenyl ether is prepared by raw material of paranitrochlorobenzene | |
| CN105418470B (en) | A kind of synthetic method of clethodim | |
| CN101492826B (en) | Method for synthesis of aniline and alkali-chloride with electrochemical conjugate synthesis | |
| CN109651299A (en) | Chlorohydrination epoxides process units and its application method more than a kind of purpose product | |
| CN109608306A (en) | A kind of industrialized preparing process and process units of 2,5- dimethyl -2,5-HD | |
| CN102633653A (en) | Method for preparing o-phenylenediamine by catalytic hydrogenation of o-nitrophenylamine | |
| CN110218151A (en) | A kind of device and method that tower reactor Flash Type heat pump reactive distillation prepares propyl propionate | |
| CN101781164B (en) | Preparation method of difluoromono-chloroethane | |
| CN209602410U (en) | A kind of industrial production device of 2,5- dimethyl -2,5-HD | |
| CN106748763A (en) | Two kettles combine the method for phase-transfer Wittig reaction methyl benzoate | |
| CN105924328B (en) | A kind of highly selective green hydrolysis technique for preparing benzyl alcohol | |
| CN104844469A (en) | Clean production technology of methyl anthranilate | |
| CN106905269A (en) | The technique that a kind of autoclave continuously hydrogen adding produces 2 methyltetrahydrofurans | |
| CN106565415A (en) | Method for preparing monochlorobenzene | |
| CN203976418U (en) | A kind ofly take Repone K, Sweet natural gas and realize the production system of comprehensive utilization of resources as raw material | |
| CN101633598A (en) | Method for preparing methane chloride by dimethyl sulfate | |
| CN104030321A (en) | Production system and production method for realizing comprehensive utilization of resource by taking potassium chloride and natural gas as raw material | |
| CN208022931U (en) | A kind of synthesis 2- methyl-3-trifluoromethyl phenylamine devices | |
| CN203440262U (en) | Device for producing trans-1, 2-dichloroethylene with acetylene by adopting catalytic chlorination method | |
| CN114247277A (en) | Recycling system and method for supplementing furan phenol reaction waste gas | |
| CN106883129B (en) | Method for preparing m-chloroaniline by using meta-oil | |
| CN101481298A (en) | Production process for refining dichlorohydrin by glycerol reaction distillation | |
| CN105037113A (en) | Synthesis method of carbonic acid ortho-ester | |
| CN101376634A (en) | Non-polluted method for producing o-chloroaniline with ferrous powder as reducer | |
| CN103570202B (en) | Method and device for recovering electrolytic residues produced in process of producing perfluorocaprylic acid by electrolytic process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |