CN110252212A - A kind of continuous esterification process units of mixed dibasic acid dimethyl ester - Google Patents
A kind of continuous esterification process units of mixed dibasic acid dimethyl ester Download PDFInfo
- Publication number
- CN110252212A CN110252212A CN201910688243.1A CN201910688243A CN110252212A CN 110252212 A CN110252212 A CN 110252212A CN 201910688243 A CN201910688243 A CN 201910688243A CN 110252212 A CN110252212 A CN 110252212A
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- esterification
- reaction kettle
- continuous
- low level
- dibasic acid
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- 230000032050 esterification Effects 0.000 title claims abstract description 58
- 238000005886 esterification reaction Methods 0.000 title claims abstract description 58
- 239000002253 acid Substances 0.000 title claims abstract description 21
- OJURWUUOVGOHJZ-UHFFFAOYSA-N methyl 2-[(2-acetyloxyphenyl)methyl-[2-[(2-acetyloxyphenyl)methyl-(2-methoxy-2-oxoethyl)amino]ethyl]amino]acetate Chemical compound C=1C=CC=C(OC(C)=O)C=1CN(CC(=O)OC)CCN(CC(=O)OC)CC1=CC=CC=C1OC(C)=O OJURWUUOVGOHJZ-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 47
- 241000521257 Hydrops Species 0.000 claims abstract description 9
- 206010030113 Oedema Diseases 0.000 claims abstract description 9
- 239000011344 liquid material Substances 0.000 claims abstract description 4
- 150000002148 esters Chemical class 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 13
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 239000002904 solvent Substances 0.000 description 6
- 239000001361 adipic acid Substances 0.000 description 4
- 235000011037 adipic acid Nutrition 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 2
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 2
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 2
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- JDSQBDGCMUXRBM-UHFFFAOYSA-N 2-[2-(2-butoxypropoxy)propoxy]propan-1-ol Chemical compound CCCCOC(C)COC(C)COC(C)CO JDSQBDGCMUXRBM-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 229930192334 Auxin Natural products 0.000 description 1
- MUXOBHXGJLMRAB-UHFFFAOYSA-N Dimethyl succinate Chemical compound COC(=O)CCC(=O)OC MUXOBHXGJLMRAB-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002363 auxin Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 150000001896 cresols Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- XTDYIOOONNVFMA-UHFFFAOYSA-N dimethyl pentanedioate Chemical compound COC(=O)CCCC(=O)OC XTDYIOOONNVFMA-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000004702 methyl esters Chemical group 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0046—Sequential or parallel reactions, e.g. for the synthesis of polypeptides or polynucleotides; Apparatus and devices for combinatorial chemistry or for making molecular arrays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/1862—Stationary reactors having moving elements inside placed in series
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/008—Details of the reactor or of the particulate material; Processes to increase or to retard the rate of reaction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
- B01J8/10—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles or endless belts
-
- 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
Abstract
The invention discloses a kind of continuous esterification process units of mixed dibasic acid dimethyl ester, including reaction kettle of the esterification, the gaseous feed pipeline that reaction kettle of the esterification is continuously passed through with high-order continuous feed pipeline, low level continuous discharge pipeline and low level respectively is connected, and overflow baffle is provided in reaction kettle of the esterification；Reaction kettle of the esterification upper lateral part is provided with tower section, is internally provided with blast cap in tower section, blast cap bottom is provided with hydrops slot, the liquid material condensed out is individually recycled by the hydrops slot of blast cap bottom；The reaction kettle of the esterification be it is multiple, multiple reaction kettle of the esterification are sequentially connected in series together by high-order continuous feed pipeline of the low level continuous discharge pipeline of previous reaction kettle of the esterification as the latter reaction kettle of the esterification.The present invention produces mixed dibasic acid dimethyl ester using continuous esterification, and installation cost is low, good product quality, high production efficiency, DBE product purity >=99.0% of acquisition, has good market prospects.
Description
Technical field
The present invention relates to a kind of high-quality high boiling solvent process units, more particularly to a kind of mixed dibasic acid dimethyl ester
Continuous esterification process units.
Background technique
Higher boiling mixing dicarboxylic acids dimethyl ester is also known as DBE, by dimethyl succinate, dimethyl glutarate, adipic acid two
Three kinds of component compositions of methyl esters are higher boiling, low cost, low volatility and the fragranced with excellent dissolubility, ester, environmental protection
Nontoxic, use is safe, can replace that toxicity is big, the isophorone of tanginess, ethylene glycol ether acetate (CAC), ethylene glycol
Monobutyl ether (anti-plain boiled water), Propylene Glycol Ether Ester Series Solvent, cyclohexanone, diacetone alcohol, cresols equal solvent.These good characteristics determine
DBE can be used widely in fields such as coil steel coating, Baking Paint, coatings for tin plate printing, car paint, woodcare paint, ink industries, because
This is analyzed from properties of product, has good market prospects.
Mixed dibasic acid DBA is also known as nylon acid, is the byproduct in adipic acid production process, and main organic principle is for oneself
Diacid (ADA), glutaric acid (GA) and succinic acid (SA), therefore also have the title of AGS acid.Mainly for the production of solvent, plasticizer, go back
It can be used for manufacturing the raw material of pesticide, auxin, synthetic rubber, foam plastic, production high boiling solvent is the main of it
Purposes.With rising rapidly for domestic adipic acid production capacity, the binary acid purposes exploitation of by-product is being constantly updated in adipic acid production.
As the solvent industry of binary acid main application, the production technology research of DBE is also constantly improving.
Summary of the invention
The technical problems to be solved by the present invention are: providing a kind of continuous esterification production dress of mixed dibasic acid dimethyl ester
It sets, the installation cost is low, good product quality, DBE product purity >=99.0% of acquisition.
The technical solution that the present invention is taken in order to solve the technical problem is as follows:
A kind of continuous esterification process units of mixed dibasic acid dimethyl ester, including reaction kettle of the esterification, the reaction kettle of the esterification difference
The gaseous feed pipeline being continuously passed through with high-order continuous feed pipeline, low level continuous discharge pipeline and low level is connected, and is being esterified
Overflow baffle is provided in reaction kettle, the height at low level continuous discharge piping inlet end is higher than the bottom of overflow baffle, and a high position is even
The discharge end height of continuous feeding line is lower than the top of overflow baffle；Reaction kettle of the esterification upper lateral part is provided with tower section, in tower section
It is internally provided with blast cap, blast cap bottom is provided with hydrops slot, the liquid material condensed out passes through the hydrops slot of blast cap bottom
Individually recycling；The reaction kettle of the esterification be it is multiple, the low level continuous discharge pipeline of previous reaction kettle of the esterification is as the latter ester
The high-order continuous feed pipeline for changing reaction kettle, multiple reaction kettle of the esterification are sequentially connected in series together.
Tower section top is provided with thermometer and pressure gauge, discharging pipeline observation is installed on low level continuous discharge pipeline
Visor.
Liquidometer and thermometer, thermometer and steam control valve interlocking, steam control valve are provided on reaction kettle of the esterification
It is arranged on steam conveying pipe.
The dredging valve that the reaction kettle of the esterification bottom is connected with bottom discharge pipe and prevents bottom from blocking, it is anti-in esterification
It answers and agitating device is installed inside kettle.
The height of the overflow baffle is the 30~95% of the reaction kettle of the esterification height.
The present invention produces mixed dibasic acid dimethyl ester using continuous esterification, and the course of work is as follows:
1, DBA material is continued into series connection reaction kettle of the esterification by high-order continuous feed pipeline, while catalyst is added, and point
It is not continually fed into methanol stirring, carries out reaction；
2, overflow baffle is installed before low level continuous discharge pipeline, guarantees that material in reactor sufficiently stops the reaction time,
Discharging pipeline observation visor is installed on low level continuous discharge pipeline；
3, at 60~200 DEG C, tower top temperature is controlled at 60~100 DEG C the control of esterification temperature in the kettle；
4, funnel-cap type structure, the liquid condensed out the water and carbinol mixture generated during esterification: are used inside tower section
State product is individually recycled by blast cap bottom hydrops slot, and water and carbinol mixture enter in methanol distillation column reuse methanol again；
5, agitating device is installed inside reaction kettle, liquidometer and thermometer are installed, thermometer and steam control valve interlock
Control reaction temperature；
6, the dredging valve that bottom goes out pipeline and prevents bottom from blocking is connected in reaction kettle of the esterification bottom.
The present invention produces mixed dibasic acid dimethyl ester using continuous esterification, and installation cost is low, good product quality, raw
High-efficient, DBE product purity >=99.0% of acquisition is produced, there are good market prospects.
Detailed description of the invention:
Fig. 1 is the structural diagram of the present invention.
Specific embodiment:
The present invention will be further explained with reference to the accompanying drawing:
Referring to Fig. 1, a kind of continuous esterification process units of mixed dibasic acid dimethyl ester, including reaction kettle of the esterification 1, reaction kettle of the esterification
The 1 gaseous feed pipeline 4 being continuously passed through with high-order continuous feed pipeline 2, low level continuous discharge pipeline 3 and low level respectively is connected
It connects, overflow baffle 6 is provided in reaction kettle of the esterification 1, the height of 3 input end of low level continuous discharge pipeline is higher than overflow baffle 6
Bottom, the discharge end height of high-order continuous feed pipeline 2 is lower than the top of overflow baffle 6；It is set in 1 upper lateral part of reaction kettle of the esterification
It is equipped with tower section 7, is internally provided with blast cap 8 in tower section 7, blast cap bottom is provided with hydrops slot 18, the liquid material condensed out
It is individually recycled by the hydrops slot of blast cap bottom；Reaction kettle of the esterification 1 is multiple, the low level continuous discharge of previous reaction kettle of the esterification
High-order continuous feed pipeline of the pipeline as the latter reaction kettle of the esterification, multiple reaction kettle of the esterification are sequentially connected in series together.
7 top of tower section is provided with thermometer 9 and pressure gauge 10, discharge nozzle is installed on low level continuous discharge pipeline 3
Line observes visor 5.
Liquidometer 14 and thermometer 15 are provided on reaction kettle of the esterification 1, thermometer 15 and steam control valve 16 are interlocked, steamed
Vapour control valve 16 is arranged on steam conveying pipe 17.
In the dredging valve 12 that 1 bottom of reaction kettle of the esterification is connected with bottom discharge pipe 11 and prevents bottom from blocking, in ester
Change and agitating device 13 is installed inside reaction kettle 1.
Wherein: the height of overflow baffle 6 is the 30~95% of 1 height of reaction kettle of the esterification.
The present invention produces mixed dibasic acid dimethyl ester using continuous esterification, and installation cost is low, good product quality, raw
High-efficient, DBE product purity >=99.0% of acquisition is produced, there are good market prospects.
Claims (5)
1. a kind of continuous esterification process units of mixed dibasic acid dimethyl ester, including reaction kettle of the esterification (1), it is characterised in that: institute
State what reaction kettle of the esterification (1) was continuously passed through with high-order continuous feed pipeline (2), low level continuous discharge pipeline (3) and low level respectively
Gaseous feed pipeline (4) is connected, and is provided with overflow baffle (6) in reaction kettle of the esterification (1), low level continuous discharge pipeline (3)
The height of input end is higher than the bottom of overflow baffle (6), and the discharge end height of high-order continuous feed pipeline (2) is lower than overflow baffle
(6) top；In reaction kettle of the esterification (1), upper lateral part is provided with tower section (7), blast cap (8) is internally provided in tower section (7), in wind
Cap bottom is provided with hydrops slot (18), and the liquid material condensed out is individually recycled by the hydrops slot of blast cap bottom；The ester
Changing reaction kettle (1) is multiple, height of the low level continuous discharge pipeline of previous reaction kettle of the esterification as the latter reaction kettle of the esterification
Position continuous feed pipeline, multiple reaction kettle of the esterification are sequentially connected in series together.
2. the continuous esterification process units of mixed dibasic acid dimethyl ester according to claim 1, it is characterised in that: in tower section
(7) top is provided with thermometer (9) and pressure gauge (10), and discharging pipeline observation is equipped on low level continuous discharge pipeline (3)
Visor (5).
3. the continuous esterification process units of mixed dibasic acid dimethyl ester according to claim 1, it is characterised in that: be esterified
Liquidometer (14) and thermometer (15), thermometer (15) and steam control valve (16) interlocking, steam control are provided on reaction kettle (1)
Valve (16) processed is arranged on steam conveying pipe (17).
4. the continuous esterification process units of mixed dibasic acid dimethyl ester according to claim 1, it is characterised in that: the ester
Change the dredging valve (12) that reaction kettle (1) bottom is connected with bottom discharge pipe (11) and prevents bottom from blocking, in esterification
Agitating device (13) are installed inside kettle (1).
5. the continuous esterification process units of mixed dibasic acid dimethyl ester according to claim 1, it is characterised in that: described to overflow
The height for flowing baffle (6) is the 30~95% of the reaction kettle of the esterification (1) height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910688243.1A CN110252212A (en) | 2019-07-29 | 2019-07-29 | A kind of continuous esterification process units of mixed dibasic acid dimethyl ester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910688243.1A CN110252212A (en) | 2019-07-29 | 2019-07-29 | A kind of continuous esterification process units of mixed dibasic acid dimethyl ester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110252212A true CN110252212A (en) | 2019-09-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910688243.1A Pending CN110252212A (en) | 2019-07-29 | 2019-07-29 | A kind of continuous esterification process units of mixed dibasic acid dimethyl ester |
Country Status (1)
| Country | Link |
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| CN (1) | CN110252212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04230242A (en) * | 1990-12-27 | 1992-08-19 | Asahi Chem Ind Co Ltd | Continuous production of diaryl carbonate |
| CN201815308U (en) * | 2010-09-17 | 2011-05-04 | 昌乐屹立化工有限公司 | Mixed dibasic acid dimethyl ester continuous esterification reaction unit |
| CN104128133A (en) * | 2014-07-10 | 2014-11-05 | 中国化学赛鼎宁波工程有限公司 | Swept-back high-efficiency hot-plate diversion rectification multiphase reaction kettle |
| CN205164701U (en) * | 2015-12-01 | 2016-04-20 | 湖北汉贝化工有限公司 | A reation kettle for producing silane have a separator |
| CN205710538U (en) * | 2016-04-21 | 2016-11-23 | 浙江亿诚聚氨酯制造有限公司 | A kind of three still continuous polyester synthesis devices |
| CN109507963A (en) * | 2018-11-16 | 2019-03-22 | 浙江工业大学 | A kind of tetrahydrofuran -3- Formaldehyde Production control system and method based on DCS control |
| CN210700016U (en) * | 2019-07-29 | 2020-06-09 | 河南久圣化工有限公司 | Continuous esterification production device for mixed dibasic acid dimethyl ester |
-
2019
- 2019-07-29 CN CN201910688243.1A patent/CN110252212A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04230242A (en) * | 1990-12-27 | 1992-08-19 | Asahi Chem Ind Co Ltd | Continuous production of diaryl carbonate |
| CN201815308U (en) * | 2010-09-17 | 2011-05-04 | 昌乐屹立化工有限公司 | Mixed dibasic acid dimethyl ester continuous esterification reaction unit |
| CN104128133A (en) * | 2014-07-10 | 2014-11-05 | 中国化学赛鼎宁波工程有限公司 | Swept-back high-efficiency hot-plate diversion rectification multiphase reaction kettle |
| CN205164701U (en) * | 2015-12-01 | 2016-04-20 | 湖北汉贝化工有限公司 | A reation kettle for producing silane have a separator |
| CN205710538U (en) * | 2016-04-21 | 2016-11-23 | 浙江亿诚聚氨酯制造有限公司 | A kind of three still continuous polyester synthesis devices |
| CN109507963A (en) * | 2018-11-16 | 2019-03-22 | 浙江工业大学 | A kind of tetrahydrofuran -3- Formaldehyde Production control system and method based on DCS control |
| CN210700016U (en) * | 2019-07-29 | 2020-06-09 | 河南久圣化工有限公司 | Continuous esterification production device for mixed dibasic acid dimethyl ester |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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