CN107245035A - A kind of cleaning production apparatus of low carbon acid higher boiling alcohol ester and use technique - Google Patents
A kind of cleaning production apparatus of low carbon acid higher boiling alcohol ester and use technique Download PDFInfo
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- CN107245035A CN107245035A CN201710400743.1A CN201710400743A CN107245035A CN 107245035 A CN107245035 A CN 107245035A CN 201710400743 A CN201710400743 A CN 201710400743A CN 107245035 A CN107245035 A CN 107245035A
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
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Abstract
A kind of cleaning production apparatus of low carbon acid higher boiling alcohol ester and use technique, high-boiling point alcohol is added in the reactor of four series connection, it is preheated to after certain temperature, low carbon acid is gradually added into the first reactor by delivery pump, the low-carbon sour water mixed vapour for reacting generation is shifted by next reactor by pipeline simultaneously and continues absorbing reaction, until water outlet reaches discharge standard；Treat the first reactor after completion of the reaction, discharge, and add the high-boiling point alcohol of metering as afterbody absorbing reaction kettle；The second reactor is converted into main reaction kettle simultaneously, low carbon acid is gradually added by delivery pump thereto；Treat that the reaction of the second reactor is finished, repeat aforesaid operations step, realize the continuous clean manufacturing of low carbon acid higher boiling alcohol ester；The present invention improves the utilization rate of low carbon acid by the multistage esterification of low carbon acid and high-boiling point alcohol, it is to avoid the generation with water low-carbon acid waste liquid, improves production efficiency, realizes the clean manufacturing of low carbon acid higher boiling alcohol ester.
Description
Technical field：
Patent of the present invention is related to a kind of cleaning production apparatus of low carbon acid higher boiling alcohol ester and uses technique, belongs to low carbon acid higher boiling
Alcohol ester field.
Background technology：
The synthesis on low carbon acid higher boiling alcohol ester is generally single step reaction at present, and the more investigation for paying attention to catalyst, used
Catalyst has ionic liquid, phosphomolybdic acid etc.（Such as CN102675095A, CN102030614 A）, reaction uses intermittent reaction
Mode carry out, and to the acid-bearing wastewater that is produced in esterification process also without appropriate processing method.
Also there is patent to disclose in addition and high-grade aliphatic ester, polyol ester and polyester product are synthesized by the way of multi-floating bodies
Report, such as CN201815308U, CN102432846A, CN101891620A, CN1337967A, CN105753690A, but
It is, to solve the problems, such as energy loss, the semi-finished product transesterify in course of reaction to next stage reactor to be continued to react, for
The low-carbon alcohols or low carbon acid and the mixed vapour of water produced in esterification reaction process still fail to be fully used, and are reacting
Also need to be distilled after finishing or acid therein or alcohol are reclaimed in rectifying, considerably increase equipment investment and energy loss.
The content of the invention：
The present invention for the deficiencies in the prior art there is provided a kind of cleaning production apparatus of low carbon acid higher boiling alcohol ester and
Using technique, to solve problems of the prior art.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of cleaning production apparatus of low carbon acid higher boiling alcohol ester, the cleaning production apparatus include four be serially connected first
Reactor, the second reactor, the 3rd reactor, the 4th reactor, provided with the between first reactor and the second reactor
One pipeline, is provided with the second pipeline, the 3rd reactor and the 4th reaction between second reactor and the 3rd reactor
The 3rd pipeline is provided between kettle, the 4th pipeline, first pipeline are provided between the 4th reactor and the first reactor
The first valve is provided with, second pipeline is provided with the second valve, and the 3rd pipeline is provided with the 3rd valve, the described 4th
Pipeline is provided with the 4th valve.
It is preferred that, the material of first reactor is enamel, enamel, stainless steel inner lining polytetrafluoroethylene (PTFE) or 316L
Stainless steel；First pipeline, the second pipeline, the material of the 3rd pipeline are stainless steel inner lining polytetrafluoroethylene (PTFE).
It is preferred that, a kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester is as follows：
（1）Metering is put into the first reactor being serially connected, the second reactor, the 3rd reactor, the 4th reactor respectively
High-boiling point alcohol, and be passed through nitrogen into four reactors simultaneously, and be preheated to certain temperature；
（2）It is gradually added low carbon acid into the first reactor, carries out esterification, while by the first pipeline by the first reactor
The low carbon acid of generation-water mixed vapour is transferred in the second reactor, and is reacted with the material in the second reactor；
（3）Material in second reactor carries out esterification, while the low-carbon for being generated the second reactor by the second pipeline
Acid-water mixed vapour is transferred in the 3rd reactor, and is reacted with the material in the 3rd reactor；
（4）Material in 3rd reactor carries out esterification, while the low-carbon for being generated the 3rd reactor by the 3rd pipeline
Acid-water mixed vapour is transferred in the 4th reactor, and is reacted with the material in the 4th reactor, and by reactor
Low carbon acid-water tail gas is discharged；
（5）After being reacted completely in the first reactor, the low carbon acid high boiling ester of the generation in the first reactor is discharged；
（6）By the mixture of the second reactor according to step（1）-（5）In the first reactor the step of proceed reaction；By
The mixture of three reactors is according to step（1）-（5）In the second reactor the step of proceed reaction；By the 4th reactor
Mixture is according to step（1）-（5）In three reactors the step of proceed reaction；By the mixture of the first reactor according to
Step（1）-（5）In four reactors the step of proceed reaction；
（7）Work as step（6）After reaction terminates, by the mixture of the 3rd reactor according to step（1）-（4）In first reactor
Step proceeds reaction；By the mixture of the 4th reactor according to step（1）-（4）In the second reactor the step of continue into
Row reaction；By the mixture of the first reactor according to step（1）-（4）In three reactors the step of proceed reaction；By
The mixture of two reactors is according to step（1）-（4）In four reactors the step of proceed reaction；
（8）Work as step（7）After reaction terminates, by the mixture of the 4th reactor according to step（1）-（4）In first reactor
Step proceeds reaction；By the mixture of the first reactor according to step（1）-（4）In the second reactor the step of continue into
Row reaction；By the mixture of the second reactor according to step（1）-（4）In three reactors the step of proceed reaction；By
The mixture of three reactors is according to step（1）-（4）In four reactors the step of proceed reaction；Four reactors are successively
Analogize, circulation is carried out.
It is preferred that, the step（1）During middle high-boiling point alcohol is monohydric alcohol of the boiling point more than 150 DEG C, dihydric alcohol, polyalcohol
The combination of any one or more.
It is preferred that, the step（1）Middle high-boiling point alcohol be C6 alcohol, C7 alcohol, C8 alcohol, C9 alcohol, C10 alcohol, C11 alcohol, C12 alcohol,
Ethylene glycol, propane diols, diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol, glycerine, pentaerythrite, sorb
The combination of any one in alcohol, mannitol or more.
It is preferred that, the step（1）Middle high-boiling point alcohol is any one in glycerine, triethylene glycol, diethylene glycol (DEG).
It is preferred that, the step（1）The volume of the high-boiling point alcohol of middle addition is the 30 ~ 60% of reactor volume.
It is preferred that, the step（1）The temperature of middle preheating is 110 ~ 160 DEG C.
It is preferred that, the step（2）Middle low carbon acid is any one in formic acid, acetic acid.
It is preferred that, the process step（4）The low carbon acid of discharge-water tail gas absorbs through buck, and adjusts pH value to after 6 ~ 8
Discharged again.
It is preferred that, the step（5）The triacetyl glycerine content ＞ 95% of middle generation.
As a result of above-mentioned preparation technology, the beneficial effect of patent of the present invention is：
The invention provides a kind of reaction conversion ratio is high, with short production cycle and energy consumption is low, and can be during synthetic ester
Solve the problems, such as the low carbon acid high-boiling point alcohol continuous esterification preparation technology of the three wastes；
The present invention can realize the multistage continuous esterification absorbing reaction of low carbon acid, and low carbon acid conversion is complete, effectively prevent aqueous
The generation of low-carbon acid waste liquid, realizes cleaning, continuously producing for such product；
The Acetic Acid-Water tail gas discharged after the cleaning production apparatus processing for the low carbon acid higher boiling alcohol ester that the present invention is provided, vinegar
The COD ＜ 1000 of acid-water tail gas；
Low carbon acid can be made full use of in the present invention, and realizes the recycling of low carbon acid；Can be by previous step in the present invention
Unnecessary low carbon acid-water in reactor is passed through in next reactor, and low carbon acid-water with heat enters in next reactor,
And proceed reaction, the waste of resource can be prevented effectively from effectively save heat.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the cleaning production apparatus of low carbon acid higher boiling alcohol ester；
In figure：1st, the first reactor, the 2, second reactor, the 3, the 3rd reactor, the 4, the 4th reactor, the 5, first pipeline, 6,
Two pipelines, the 7, the 3rd pipeline, the 8, the 4th pipeline, the 9, first valve, the 10, second valve, the 11, the 3rd valve, the 12, the 4th valve.
Embodiment：
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated.
Embodiment 1:
A kind of cleaning production apparatus of low carbon acid higher boiling alcohol ester, the cleaning production apparatus include four be serially connected the
One reactor 1, the second reactor 2, the 3rd reactor 3, the 4th reactor 4, the reactor 2 of the first reactor 1 and second it
Between be provided with the first pipeline 5, the second pipeline 6, the 3rd reactor 3 are provided between the reactor 3 of the second reactor 2 and the 3rd
And the 4th be provided with the 3rd pipeline 7 between reactor 4, provided with the 4th pipe between the 4th reactor 4 and the first reactor 1
Line 8, first pipeline 5 is provided with the first valve 9, and second pipeline 6 is provided with the second valve 10, the 3rd pipeline 7
The 3rd valve 11 is provided with, the 4th pipeline 8 is provided with the 4th valve 12.
The material of first reactor 1 is the stainless of enamel, enamel, stainless steel inner lining polytetrafluoroethylene (PTFE) or 316L
Steel；First pipeline 5, the second pipeline 6, the material of the 3rd pipeline 7 are stainless steel inner lining polytetrafluoroethylene (PTFE).
A kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester is as follows：1）As shown in drawings, thing is passed through
Expect import, put into the sweet of 600kg into the first reactor 1, the second reactor 2, the 3rd reactor 3, the 4th reactor 4 respectively
Oil, nitrogen displacement closes the first valve 9, the second valve 10, the 3rd valve 11, the 4th valve 12, and four reactors rise simultaneously
Temperature, when temperature rises to 110 DEG C, opens the first valve 9, the second valve 10, the 3rd valve 11, the 4th valve 12, from the first thing
Material import enters 1175kg acetic acid into the first reactor 1 with constant flow velocity, and is carried out instead with the material in the first reactor 1
Should, unnecessary aqueous acetic acid enters the bottom of the second reactor 2 by the first pipeline 5 after being reacted in the first reactor 1, and with the
Material inside two reactors 2 is reacted, and unnecessary aqueous acetic acid passes through the second pipeline 6 after being reacted in the second reactor 2
Reacted into the bottom of the 3rd reactor 3, and with the material inside the 3rd reactor 3, it is unnecessary after being reacted in the 3rd reactor 3
Aqueous acetic acid enter the 4th reactor 4 bottom by the 3rd pipeline 7, and carried out instead with the material the 4th reactor 4 inside
Should, the Acetic Acid-Water tail gas of generation absorbs through buck again, can directly be discharged after regulation pH value to 6 ~ 8, the Acetic Acid-Water tail gas of generation
COD ＜ 1000；Sampling the first reactor 1 of detection, as the product triacetyl glycerine content ＞ 95% in the first reactor 1
When, cooling discharge.
2）By the mixture of the second reactor 2 according to above-mentioned steps 1）In the first reactor 1 the step of proceed reaction；
By the mixture of the 3rd reactor 3 according to above-mentioned steps 1）In the second reactor 2 the step of proceed reaction；By the 4th reaction
The mixture of kettle 4 is according to above-mentioned steps 1）In the 3rd reactor 3 the step of proceed reaction；By the mixing of the first reactor 1
Thing is according to above-mentioned steps 1）In the 4th reactor 4 the step of proceed reaction；
3）When step 2）After reaction terminates, by the mixture of the 3rd reactor 3 according to step 1）In the first reactor 1 the step of after
It is continuous to be reacted；By the mixture of the 4th reactor 4 according to step 1）In the second reactor 2 the step of proceed reaction；Will
The mixture of first reactor 1 is according to step 1）In the 3rd reactor 3 the step of proceed reaction；By the second reactor 2
Mixture is according to step 1）In the 4th reactor 4 the step of proceed reaction；
4）When step 3）After reaction terminates, by the mixture of the 4th reactor 4 according to step 1）In the first reactor 1 the step of after
It is continuous to be reacted；By the mixture of the first reactor 1 according to step 1）In the second reactor 2 the step of proceed reaction；Will
The mixture of second reactor 2 is according to step 1）In the 3rd reactor 3 the step of proceed reaction；By the 3rd reactor 3
Mixture is according to step 1）In the 4th reactor 4 the step of proceed reaction；Four reactors the like, circulation is carried out.
Embodiment 2：
A kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester is as follows：1）As shown in drawings, entered by material
Mouthful, 1000kg triethylene glycol is put into the first reactor 1, the second reactor 2, the 3rd reactor 3, the 4th reactor 4 respectively,
Nitrogen displacement, closes the first valve 9, the second valve 10, the 3rd valve 11, the 4th valve 12, and four reactors heat up simultaneously, when
When temperature rises to 160 DEG C, the first valve 9, the second valve 10, the 3rd valve 11, the 4th valve 12 are opened, from first material import
3600kg formic acid is entered with constant flow velocity into the first reactor 1, and reacted with the material in the first reactor 1, first
Unnecessary aqueous formic acid enters the bottom of the second reactor 2 by the first pipeline 5 after being reacted in reactor 1, and is reacted with second
Material inside kettle 2 is reacted, and unnecessary aqueous formic acid enters the by the second pipeline 6 after being reacted in the second reactor 2
The bottom of three reactor 3, and reacted with the material inside the 3rd reactor 3, unnecessary formic acid after being reacted in the 3rd reactor 3
The aqueous solution enters the bottom of the 4th reactor 4 by the 3rd pipeline 7, and is reacted with the material inside the 4th reactor 4, generates
Formic acid-water tail gas absorbed again through buck, regulation pH value is to can directly discharge after 6 ~ 8, the COD ＜ of formic acid-water tail gas of generation
1000；Sampling the first reactor 1 of detection, as the product tricarboxylic acid triethyleneglycol ester content ＞ 98% in the first reactor 1, drop
Temperature discharging.
2）By the mixture of the second reactor 2 according to above-mentioned steps 1）In the first reactor 1 the step of proceed reaction；
By the mixture of the 3rd reactor 3 according to above-mentioned steps 1）In the second reactor 2 the step of proceed reaction；By the 4th reaction
The mixture of kettle 4 is according to above-mentioned steps 1）In the 3rd reactor 3 the step of proceed reaction；By the mixing of the first reactor 1
Thing is according to above-mentioned steps 1）In the 4th reactor 4 the step of proceed reaction；
3）When step 2）After reaction terminates, by the mixture of the 3rd reactor 3 according to step 1）In the first reactor 1 the step of after
It is continuous to be reacted；By the mixture of the 4th reactor 4 according to step 1）In the second reactor 2 the step of proceed reaction；Will
The mixture of first reactor 1 is according to step 1）In the 3rd reactor 3 the step of proceed reaction；By the second reactor 2
Mixture is according to step 1）In the 4th reactor 4 the step of proceed reaction；
4）When step 3）After reaction terminates, by the mixture of the 4th reactor 4 according to step 1）In the first reactor 1 the step of after
It is continuous to be reacted；By the mixture of the first reactor 1 according to step 1）In the second reactor 2 the step of proceed reaction；Will
The mixture of second reactor 2 is according to step 1）In the 3rd reactor 3 the step of proceed reaction；By the 3rd reactor 3
Mixture is according to step 1）In the 4th reactor 4 the step of proceed reaction；Four reactors the like, circulation is carried out.
Embodiment 3：
A kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester is as follows：1）As shown in drawings, entered by material
Mouthful, 1300kg diethylene glycol (DEG) is put into the first reactor 1, the second reactor 2, the 3rd reactor 3, the 4th reactor 4 respectively,
Nitrogen displacement, closes the first valve 9, the second valve 10, the 3rd valve 11, the 4th valve 12, and four reactors heat up simultaneously, when
When temperature rises to 140 DEG C, the first valve 9, the second valve 10, the 3rd valve 11, the 4th valve 12 are opened, from first material import
2943kg acetic acid is entered with constant flow velocity into the first reactor 1, and reacted with the material in the first reactor 1, first
Unnecessary aqueous acetic acid enters the bottom of the second reactor 2 by the first pipeline 5 after being reacted in reactor 1, and is reacted with second
Material inside kettle 2 is reacted, and unnecessary aqueous acetic acid enters the by the second pipeline 6 after being reacted in the second reactor 2
The bottom of three reactor 3, and reacted with the material inside the 3rd reactor 3, unnecessary acetic acid after being reacted in the 3rd reactor 3
The aqueous solution enters the bottom of the 4th reactor 4 by the 3rd pipeline 7, and is reacted with the material inside the 4th reactor 4, generates
Acetic Acid-Water tail gas absorbed again through buck, regulation pH value is to can directly discharge after 6 ~ 8, the COD ＜ of the Acetic Acid-Water tail gas of generation
1000；Sampling the first reactor 1 of detection, as the three acetic acid diethylene glycol (DEG) ester content ＞ 99% of product in the first reactor 1, drop
Temperature discharging.
2）By the mixture of the second reactor 2 according to above-mentioned steps 1）In the first reactor 1 the step of proceed reaction；
By the mixture of the 3rd reactor 3 according to above-mentioned steps 1）In the second reactor 2 the step of proceed reaction；By the 4th reaction
The mixture of kettle 4 is according to above-mentioned steps 1）In the 3rd reactor 3 the step of proceed reaction；By the mixing of the first reactor 1
Thing is according to above-mentioned steps 1）In the 4th reactor 4 the step of proceed reaction；
3）When step 2）After reaction terminates, by the mixture of the 3rd reactor 3 according to step 1）In the first reactor 1 the step of after
It is continuous to be reacted；By the mixture of the 4th reactor 4 according to step 1）In the second reactor 2 the step of proceed reaction；Will
The mixture of first reactor 1 is according to step 1）In the 3rd reactor 3 the step of proceed reaction；By the second reactor 2
Mixture is according to step 1）In the 4th reactor 4 the step of proceed reaction；
4）When step 3）After reaction terminates, by the mixture of the 4th reactor 4 according to step 1）In the first reactor 1 the step of after
It is continuous to be reacted；By the mixture of the first reactor 1 according to step 1）In the second reactor 2 the step of proceed reaction；Will
The mixture of second reactor 2 is according to step 1）In the 3rd reactor 3 the step of proceed reaction；By the 3rd reactor 3
Mixture is according to step 1）In the 4th reactor 4 the step of proceed reaction；Four reactors the like, circulation is carried out.
Above-described embodiment is only the preferred technical solution of the present invention, and is not construed as the limitation for the present invention, the present invention
The technical scheme that should be recorded with claim of protection domain, including in the technical scheme recorded of claim technical characteristic etc.
It is protection domain with alternative, i.e., equivalent substitution within this range is improved, also within protection scope of the present invention.
Claims (9)
1. a kind of cleaning production apparatus of low carbon acid higher boiling alcohol ester, it is characterised in that：The cleaning production apparatus includes four
The first reactor, the second reactor, the 3rd reactor, the 4th reactor being serially connected, first reactor and second anti-
Answer and the first pipeline is provided between kettle, the second pipeline, the 3rd reaction are provided between second reactor and the 3rd reactor
The 3rd pipeline is provided between kettle and the 4th reactor, provided with the 4th pipe between the 4th reactor and the first reactor
Line, first pipeline is provided with the first valve, and second pipeline is provided with the second valve, and the 3rd pipeline is provided with the
Three valves, the 4th pipeline is provided with the 4th valve.
2. a kind of cleaning production apparatus of low carbon acid higher boiling alcohol ester according to claim 1, it is characterised in that：
The material of first reactor is enamel, enamel, stainless steel inner lining polytetrafluoroethylene (PTFE) or 316L stainless steel；It is described
First pipeline, the second pipeline, the material of the 3rd pipeline are stainless steel inner lining polytetrafluoroethylene (PTFE).
3. it is a kind of using a kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester as described in claim 1,
Characterized in that, comprising the following steps that：
（1）Metering is put into the first reactor being serially connected, the second reactor, the 3rd reactor, the 4th reactor respectively
High-boiling point alcohol, and be passed through nitrogen into four reactors simultaneously, and be preheated to certain temperature；
（2）It is gradually added low carbon acid into the first reactor, carries out esterification, while by the first pipeline by the first reactor
The low carbon acid of generation-water mixed vapour is transferred in the second reactor, and is reacted with the material in the second reactor；
（3）Material in second reactor carries out esterification, while the low-carbon for being generated the second reactor by the second pipeline
Acid-water mixed vapour is transferred in the 3rd reactor, and is reacted with the material in the 3rd reactor；
（4）Material in 3rd reactor carries out esterification, while the low-carbon for being generated the 3rd reactor by the 3rd pipeline
Acid-water mixed vapour is transferred in the 4th reactor, and is reacted with the material in the 4th reactor, and by reactor
Low carbon acid-water tail gas is discharged；
（5）After being reacted completely in the first reactor, the low carbon acid high boiling ester of the generation in the first reactor is discharged；
（6）By the mixture of the second reactor according to step（1）-（5）In the first reactor the step of proceed reaction；By
The mixture of three reactors is according to step（1）-（5）In the second reactor the step of proceed reaction；By the 4th reactor
Mixture is according to step（1）-（5）In three reactors the step of proceed reaction；By the mixture of the first reactor according to
Step（1）-（5）In four reactors the step of proceed reaction；
（7）Work as step（6）After reaction terminates, by the mixture of the 3rd reactor according to step（1）-（4）In first reactor
Step proceeds reaction；By the mixture of the 4th reactor according to step（1）-（4）In the second reactor the step of continue into
Row reaction；By the mixture of the first reactor according to step（1）-（4）In three reactors the step of proceed reaction；By
The mixture of two reactors is according to step（1）-（4）In four reactors the step of proceed reaction；
（8）Work as step（7）After reaction terminates, by the mixture of the 4th reactor according to step（1）-（4）In first reactor
Step proceeds reaction；By the mixture of the first reactor according to step（1）-（4）In the second reactor the step of continue into
Row reaction；By the mixture of the second reactor according to step（1）-（4）In three reactors the step of proceed reaction；By
The mixture of three reactors is according to step（1）-（4）In four reactors the step of proceed reaction；Four reactors are successively
Analogize, circulation is carried out.
4. a kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester according to claim 3, its feature
It is：The step（1）Middle high-boiling point alcohol be any one in monohydric alcohol of the boiling point more than 150 DEG C, dihydric alcohol, polyalcohol or
Combination above.
5. a kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester according to claim 3, its feature
It is：The step（1）The volume of the high-boiling point alcohol of middle addition is the 30 ~ 60% of reactor volume.
6. a kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester according to claim 3, its feature
It is：The step（1）The temperature of middle preheating is 110 ~ 160 DEG C.
7. a kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester according to claim 3, its feature
It is：The step（2）Middle low carbon acid is any one in formic acid, acetic acid.
8. a kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester according to claim 3, its feature
It is：The process step（4）The low carbon acid of discharge-water tail gas absorbs through buck, and adjusts pH value to being arranged again after 6 ~ 8
Put.
9. a kind of use technique of the cleaning production apparatus of low carbon acid higher boiling alcohol ester according to claim 3, its feature
It is：The step（5）The triacetyl glycerine content ＞ 95% of middle generation.
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| CN201710400743.1A CN107245035B (en) | 2017-05-31 | 2017-05-31 | Clean production device for low-carbon acid high-boiling-point alcohol ester and use process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114307920A (en) * | 2021-07-30 | 2022-04-12 | 江苏雷蒙新材料有限公司 | Continuous production system and production process of polyol acetate |
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| WO2016131845A1 (en) * | 2015-02-18 | 2016-08-25 | IFP Energies Nouvelles | Process for esterification of a diol using a reactive distillation |
| CN105693514A (en) * | 2016-03-18 | 2016-06-22 | 江苏雷蒙化工科技有限公司 | Continuous production system and production method of polyalcohol low-carbon carboxylate ester |
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| CN114307920A (en) * | 2021-07-30 | 2022-04-12 | 江苏雷蒙新材料有限公司 | Continuous production system and production process of polyol acetate |
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