CN220990758U - Synthesis device of 2-chloropyridine-6-carboxylic acid - Google Patents
Synthesis device of 2-chloropyridine-6-carboxylic acid Download PDFInfo
- Publication number
- CN220990758U CN220990758U CN202322623102.6U CN202322623102U CN220990758U CN 220990758 U CN220990758 U CN 220990758U CN 202322623102 U CN202322623102 U CN 202322623102U CN 220990758 U CN220990758 U CN 220990758U
- Authority
- CN
- China
- Prior art keywords
- reaction kettle
- carboxylic acid
- fixedly connected
- acyl chloride
- kettle
- 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
- ZLKMOIHCHCMSFW-UHFFFAOYSA-N 6-chloropyridine-2-carboxylic acid Chemical compound OC(=O)C1=CC=CC(Cl)=N1 ZLKMOIHCHCMSFW-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 230000015572 biosynthetic process Effects 0.000 title abstract description 8
- 238000003786 synthesis reaction Methods 0.000 title abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 141
- 150000001263 acyl chlorides Chemical class 0.000 claims abstract description 101
- 150000001735 carboxylic acids Chemical class 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000004064 recycling Methods 0.000 claims abstract description 7
- 239000002912 waste gas Substances 0.000 claims abstract description 5
- 238000004321 preservation Methods 0.000 claims description 34
- 238000010521 absorption reaction Methods 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 25
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 4
- 230000002194 synthesizing effect Effects 0.000 claims 9
- 239000000543 intermediate Substances 0.000 description 22
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 8
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- DCUJJWWUNKIJPH-UHFFFAOYSA-N nitrapyrin Chemical compound ClC1=CC=CC(C(Cl)(Cl)Cl)=N1 DCUJJWWUNKIJPH-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006277 sulfonation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002363 herbicidal effect Effects 0.000 description 1
- 239000004009 herbicide Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- IBBMAWULFFBRKK-UHFFFAOYSA-N picolinamide Chemical compound NC(=O)C1=CC=CC=N1 IBBMAWULFFBRKK-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009333 weeding Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model discloses a synthesis device of 2-chloropyridine-6-carboxylic acid. The utility model comprises an elevated tank, an acyl chloride reaction kettle and a carboxylic acid reaction kettle which are sequentially and fixedly connected through a pipeline, wherein the acyl chloride reaction kettle is fixedly connected with a waste gas recycling device through a pipeline, the lower end of the elevated tank is higher than the upper end of the acyl chloride reaction kettle, and the lower end of the acyl chloride reaction kettle is higher than the upper end of the carboxylic acid reaction kettle; and a heating device is fixedly connected outside the pipeline connecting the acyl chloride reaction kettle and the carboxylic acid reaction kettle. The utility model solves the problem that the 2-chloropyridine-6-carboxylic acid is easy to generate caking when water is added into an acyl chloride intermediate in the prior art.
Description
Technical Field
The utility model belongs to the technical field of chemical production equipment, and particularly relates to a synthesis device of 2-chloropyridine-6-carboxylic acid.
Background
The fluofen is an herbicide with a pyridine amide chemical structure developed by Pasteur company at the earliest, and has the advantages of high weeding performance, long acting time, small toxic and side effects on crops, multiple applicable crop types and the like, keeps good sales since the fluofen is marketed, has wide market application and development prospects, and also has large market demands on chemical raw materials and intermediates for producing the fluofen. In the synthesis process of the flumetofen, an important intermediate of 2-chloropyridine-6-carboxylic acid is used, in the prior art, when the 2-chloropyridine-6-carboxylic acid is produced, water is usually added into an acyl chloride intermediate to produce the 2-chloropyridine-6-carboxylic acid by using the existing production device for producing the 2-chloropyridine-6-carboxylic acid, and the existing production device for producing the 2-chloropyridine-6-carboxylic acid is easy to generate the problem that the acyl chloride intermediate is added with water and then is solidified and agglomerated due to cooling, so that stirring blades of a stirring device are stuck, and the acyl chloride intermediate cannot be uniformly mixed with the water to perform a sufficient chemical reaction.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a synthesis device of 2-chloropyridine-6-carboxylic acid.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The synthesis device of 2-chloropyridine-6-carboxylic acid comprises a high-level tank 1, an acyl chloride reaction kettle 2 and a carboxylic acid reaction kettle 5 which are sequentially and fixedly connected through pipelines, wherein a feed pipe 15 is fixedly connected to each of the high-level tank 1, the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5, the acyl chloride reaction kettle 2 is fixedly connected with an exhaust gas recycling device through a pipeline, the lower end of the high-level tank 1 is higher than the upper end of the acyl chloride reaction kettle 2, and the lower end of the acyl chloride reaction kettle 2 is higher than the upper end of the carboxylic acid reaction kettle 5; and a heating device is fixedly connected outside the pipeline connecting the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5.
Preferably, the heating device comprises a heating pipe 6, a steam inlet pipe 7 and a steam outlet pipe 8; the heating pipe 6 is fixedly sleeved outside a pipeline connecting the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5; one end of the heating pipe 6 is fixedly connected with a steam inlet pipe 7, the other end is fixedly connected with a steam outlet pipe 8, and the steam inlet pipe 7 and the steam outlet pipe 8 are fixedly connected with a steam heat source machine 16. In the application, one end of the heating pipe is fixedly connected with the steam inlet pipe, the other end of the heating pipe is fixedly connected with the steam outlet pipe, the steam inlet pipe and the steam outlet pipe are fixedly connected with the steam heat source machine, and the heating pipe is fixedly sleeved outside a pipeline connecting the acyl chloride reaction kettle and the carboxylic acid reaction kettle.
Preferably, the waste gas recycling device comprises a gas condenser 3 and an absorption tank 4, wherein the gas condenser 3 is fixedly connected with the acyl chloride reaction kettle 2 through a pipeline, the gas condenser 3 is fixedly connected with the absorption tank 4 through a pipeline, and the absorption tank 4 is fixedly connected with the acyl chloride reaction kettle 2 through a pipeline; the lower end of the gas condenser 3 is higher than the upper end of the acyl chloride reaction kettle 2 and the upper end of the absorption tank 4, and the lower end of the absorption tank 4 is higher than the upper end of the acyl chloride reaction kettle 2; the absorption tank 4 is also fixedly connected with a feeding pipe 15.
Preferably, the pipeline connecting the overhead tank 1 and the acyl chloride reaction kettle 2, the pipeline connecting the acyl chloride reaction kettle 2 and the gas condenser 3, the pipeline connecting the absorption tank 4 and the acyl chloride reaction kettle 2 and the pipeline connecting the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5 are fixedly provided with manual valves 9.
Preferably, the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5 are fixedly connected with stirring devices.
Preferably, the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5 comprise a kettle cover 10 and a kettle body 11 which are detachably connected, and the kettle cover 10 is fixedly connected with a stirring device.
Preferably, the stirring device comprises a motor 12 fixedly connected with the kettle cover 10, an output shaft of the motor 12 extends to the kettle body 11 and is fixedly connected with a stirring shaft 13, and the stirring shaft 13 is fixedly connected with stirring blades 14.
Preferably, the outer parts of the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5 are fixedly sleeved with heat preservation sleeves 17, the heat preservation sleeves 17 fixedly arranged outside the acyl chloride reaction kettle 2 are fixedly connected with the kettle body 11 of the acyl chloride reaction kettle 2, and heat preservation cavities are formed between the heat preservation sleeves 17 fixedly arranged outside the acyl chloride reaction kettle 2 and the kettle body 11 of the acyl chloride reaction kettle 2; the heat preservation sleeve 17 fixedly arranged outside the carboxylic acid reaction kettle 5 is fixedly connected with the kettle body 11 of the carboxylic acid reaction kettle 5, and a heat preservation cavity is formed between the heat preservation sleeve 17 fixedly arranged outside the carboxylic acid reaction kettle 5 and the kettle body 11 of the carboxylic acid reaction kettle 5; the heat preservation sleeve 17 fixedly arranged outside the acyl chloride reaction kettle 2 is fixedly connected with a heat source inlet pipe 18 and a heat source outlet pipe 19; the heat source inlet pipe 18 is fixedly connected and communicated with the steam inlet pipe 7, and the heat source outlet pipe 19 is fixedly connected and communicated with the steam outlet pipe 8; the heat preservation sleeve 17 fixedly arranged outside the carboxylic acid reaction kettle 5 is fixedly connected with the water inlet pipe 20 and the water outlet pipe 21, the water inlet pipe 20 and the water outlet pipe 21 are respectively fixedly connected with the water storage tank 22, and the water inlet pipe 20 is also fixedly connected with the water pump 23.
Preferably, the heat source inlet pipe 18 is fixedly connected with the lower end of the heat insulation sleeve 17, and the heat source outlet pipe 19 is fixedly connected with the upper end of the heat insulation sleeve 17.
Compared with the prior art, the application has the beneficial technical effects that:
The sulfuric acid is dripped into an acyl chloride reaction kettle through an overhead tank to carry out sulfonation reaction with 2-chloro-6-trichloromethyl pyridine which is added into the acyl chloride reaction kettle in advance, so as to obtain an acyl chloride intermediate and generate a large amount of hydrogen chloride gas; the method comprises the steps of condensing hydrogen chloride gas through a condenser, then introducing the condensed hydrogen chloride gas into an absorption tank, absorbing the condensed hydrogen chloride gas by liquid alkali which is added in advance in the absorption tank, dropwise adding the acyl chloride intermediate which is synthesized in the acyl chloride reaction tank into the carboxylic acid reaction tank through a pipeline and reacting with water which is added in advance in the carboxylic acid reaction tank to obtain 2-chloropyridine-6-carboxylic acid, wherein in the process of dropwise adding the acyl chloride intermediate into the carboxylic acid reaction tank through the pipeline, steam enters a heating pipe through a steam inlet pipe, the steam is discharged through a steam outlet pipe after passing through the heating pipe, and the heating pipe is heated to 130 ℃, namely, when the acyl chloride intermediate passes through the pipeline which is connected with the acyl chloride reaction tank and the carboxylic acid reaction tank, the temperature of the pipeline which is connected with the acyl chloride reaction tank is 130 ℃, the acyl chloride intermediate cannot generate solids because of low temperature, and the acyl chloride intermediate is added into water, compared with the prior art, the feeding sequence is also adjusted, the acyl chloride intermediate can be quickly coagulated because the acyl chloride intermediate is added into the carboxylic acid, so that a stirring device is stirred She Nianzhu is blocked by cooling, the stirring blade is carried out, the acyl chloride is stirred evenly, and the water cannot be mixed with the acyl chloride 2-6-chloropyridine, and the intermediate can not generate the water, and the problem of the acid chloride is fully mixed with the water, and the acid chloride 2-chloropyridine is produced, and the acid is fully stirred, and the acid 2-phase is dissolved and the acid is fully.
Drawings
FIG. 1 is a schematic diagram of the structure of the present application;
FIG. 2 is a schematic structural diagram of an acid chloride reactor.
In the figure, a high-level tank 1, an acyl chloride reaction kettle 2, a condenser 3, an absorption tank 4, a carboxylic acid reaction kettle 5, a heating pipe 6, a steam inlet pipe 7, a steam outlet pipe 8, a manual valve 9, a kettle cover 10, a kettle body 11, a motor 12, a stirring shaft 13, stirring blades 14, a feeding pipe 15, a steam heat source machine 16, a heat preservation sleeve 17, a heat source inlet pipe 18, a heat source outlet pipe 19, a water inlet pipe 20, a water outlet pipe 21, a water storage tank 22 and a water pump 23.
Detailed Description
As shown in fig. 1 and 2, a synthesis device of 2-chloropyridine-6-carboxylic acid comprises an overhead tank 1, an acyl chloride reaction kettle 2 and a carboxylic acid reaction kettle 5 which are sequentially and fixedly connected through a pipeline, wherein the acyl chloride reaction kettle 2 is fixedly connected with an exhaust gas recycling device through the pipeline; the waste gas recycling device comprises a gas condenser 3 and an absorption tank 4, wherein the gas condenser 3 is fixedly connected with the acyl chloride reaction kettle 2 through a pipeline, the gas condenser 3 is fixedly connected with the absorption tank 4 through a pipeline, and the absorption tank 4 is fixedly connected with the acyl chloride reaction kettle 2 through a pipeline; the lower end of the gas condenser 3 is higher than the upper end of the acyl chloride reaction kettle 2 and the upper end of the absorption tank 4, and the lower end of the absorption tank 4 is higher than the upper end of the acyl chloride reaction kettle 2; the overhead tank 1, the acyl chloride reaction kettle 2, the carboxylic acid reaction kettle 5 and the absorption tank 4 are fixedly connected with a feed pipe 15;
The lower end of the overhead tank 1 is higher than the upper end of the acyl chloride reaction kettle 2, and the lower end of the acyl chloride reaction kettle 2 is higher than the upper end of the carboxylic acid reaction kettle 5; the pipeline connecting the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5 is fixedly connected with a heating device;
The heating device comprises a heating pipe 6, a steam inlet pipe 7 and a steam outlet pipe 8; the heating pipe 6 is fixedly sleeved outside a pipeline connecting the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5; one end of the heating pipe 6 is fixedly connected with a steam inlet pipe 7, the other end is fixedly connected with a steam outlet pipe 8, and the steam inlet pipe 7 and the steam outlet pipe 8 are fixedly connected with a steam heat source machine 16.
In the application, a manual valve 9 is fixedly arranged on a pipeline connecting the overhead tank 1 and the acyl chloride reaction kettle 2, a pipeline connecting the acyl chloride reaction kettle 2 and the gas condenser 3, a pipeline connecting the absorption tank 4 and the acyl chloride reaction kettle 2 and a pipeline connecting the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5.
In addition, the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5 are fixedly connected with stirring devices, specifically, the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5 comprise a kettle cover 10 and a kettle body 11 which are connected through bolts, and the kettle cover 10 is fixedly connected with the stirring devices; the stirring device comprises a motor 12 fixedly connected with the kettle cover 10, an output shaft of the motor 12 extends to the inside of the kettle body 11 and is fixedly connected with a stirring shaft 13, and the stirring shaft 13 is fixedly connected with stirring blades 14.
In addition, the outer parts of the acyl chloride reaction kettle 2 and the carboxylic acid reaction kettle 5 are fixedly sleeved with the heat preservation sleeve 17, the heat preservation sleeve 17 fixedly arranged outside the acyl chloride reaction kettle 2 is fixedly connected with the kettle body 11 of the acyl chloride reaction kettle 2, and a heat preservation cavity is formed between the heat preservation sleeve 17 fixedly arranged outside the acyl chloride reaction kettle 2 and the kettle body 11 of the acyl chloride reaction kettle 2; the heat preservation sleeve 17 fixedly arranged outside the carboxylic acid reaction kettle 5 is fixedly connected with the kettle body 11 of the carboxylic acid reaction kettle 5, and a heat preservation cavity is formed between the heat preservation sleeve 17 fixedly arranged outside the carboxylic acid reaction kettle 5 and the kettle body 11 of the carboxylic acid reaction kettle 5; the heat preservation sleeve 17 fixedly arranged outside the acyl chloride reaction kettle 2 is fixedly connected with a heat source inlet pipe 18 and a heat source outlet pipe 19; the heat source inlet pipe 18 is fixedly connected with the lower end of the heat preservation sleeve 17, and the heat source outlet pipe 19 is fixedly connected with the upper end of the heat preservation sleeve 17; the heat source inlet pipe 18 is fixedly connected and communicated with the steam inlet pipe 7, and the heat source outlet pipe 19 is fixedly connected and communicated with the steam outlet pipe 8; the heat preservation sleeve 17 fixedly arranged outside the carboxylic acid reaction kettle 5 is fixedly connected with a water inlet pipe 20 and a water outlet pipe 21, the water inlet pipe 20 and the water outlet pipe 21 are respectively fixedly connected with a water storage tank 22, and the water inlet pipe 20 is also fixedly connected with a water pump 23.
One specific example of the production of 2-chloropyridine-6-carboxylic acid using the apparatus of the present application is:
Firstly, inputting steam into a heat preservation cavity between an acyl chloride reaction kettle body and a heat preservation sleeve by using a steam heat source machine and a heat source inlet pipe, discharging the steam through a heat source outlet pipe, continuously circulating steam between the heat preservation sleeve and the kettle body can heat the acyl chloride reaction kettle to 130 ℃, then dripping 1000kg of sulfuric acid into the acyl chloride reaction kettle through a high-level tank to be mixed with 1000kg of 2-chloro-6-trichloromethyl pyridine which is added into the acyl chloride reaction kettle in advance, in the embodiment, dripping 1000kg of sulfuric acid into the acyl chloride reaction kettle through the high-level tank for 3 hours, and then carrying out sulfonation reaction for 3 hours under the conditions of 130 ℃ and a stirring speed of 45r/min to obtain 1500kg of acyl chloride intermediate, and generating a large amount of hydrogen chloride gas; the method comprises the steps of condensing hydrogen chloride gas through a condenser, then introducing the condensed hydrogen chloride gas into an absorption tank, absorbing the condensed hydrogen chloride gas by liquid alkali which is added in advance in the absorption tank, dripping the synthesized acid chloride intermediate into 2000kg of water which is added in advance in a carboxylic acid reaction kettle through a pipeline, mixing the mixed acid chloride intermediate, dripping the mixed acid chloride intermediate into 2000kg of water which is added in advance in the carboxylic acid reaction kettle, and reacting for 1 hour under the condition that the stirring speed is 45r/min, so as to obtain 2-chloropyridine-6-carboxylic acid.
In the process of dripping the acyl chloride intermediate into the carboxylic acid reaction kettle through the pipeline, steam enters the heating pipe through the steam inlet pipe, the steam is discharged from the steam outlet pipe after passing through the heating pipe, the steam circulates between the heating pipe and the steam heat source machine, the heating pipe is heated to 130 ℃, that is, the temperature of the pipeline is 130 ℃ when the acyl chloride intermediate passes through the pipeline connecting the acyl chloride reaction kettle and the carboxylic acid reaction kettle, the acyl chloride intermediate does not generate solid at the temperature, and the acyl chloride intermediate is added into water, the feeding sequence is also adjusted.
Claims (9)
1. A device for synthesizing 2-chloropyridine-6-carboxylic acid is characterized in that: the acid chloride reaction kettle (2) and the carboxylic acid reaction kettle (5) are sequentially and fixedly connected through pipelines, a feeding pipe (15) is fixedly connected to each of the acid chloride reaction kettle (2), the acid chloride reaction kettle (2) and the carboxylic acid reaction kettle (5), the acid chloride reaction kettle (2) is fixedly connected with a waste gas recycling device through the pipelines, the lower end of the acid chloride reaction kettle (1) is higher than the upper end of the acid chloride reaction kettle (2), and the lower end of the acid chloride reaction kettle (2) is higher than the upper end of the carboxylic acid reaction kettle (5); and a heating device is fixedly connected outside a pipeline connecting the acyl chloride reaction kettle (2) and the carboxylic acid reaction kettle (5).
2. The apparatus for synthesizing 2-chloropyridine-6-carboxylic acid according to claim 1, wherein: the heating device comprises a heating pipe (6), a steam inlet pipe (7) and a steam outlet pipe (8); the heating pipe (6) is fixedly sleeved outside a pipeline connecting the acyl chloride reaction kettle (2) and the carboxylic acid reaction kettle (5); one end of the heating pipe (6) is fixedly connected with a steam inlet pipe (7), the other end is fixedly connected with a steam outlet pipe (8), and the steam inlet pipe (7) and the steam outlet pipe (8) are fixedly connected with a steam heat source machine (16).
3. The apparatus for synthesizing 2-chloropyridine-6-carboxylic acid according to claim 1, wherein: the waste gas recycling device comprises a gas condenser (3) and an absorption tank (4), wherein the gas condenser (3) is fixedly connected with the acyl chloride reaction kettle (2) through a pipeline, the gas condenser (3) is fixedly connected with the absorption tank (4) through a pipeline, and the absorption tank (4) is fixedly connected with the acyl chloride reaction kettle (2) through a pipeline; the lower extreme of gas condenser (3) is higher than the upper end of acyl chloride reation kettle (2) and the upper end of absorption jar (4), the lower extreme of absorption jar (4) is higher than the upper end of acyl chloride reation kettle (2).
4. The apparatus for synthesizing 2-chloropyridine-6-carboxylic acid according to claim 1, wherein: the pipeline connecting the overhead tank (1) and the acyl chloride reaction kettle (2), the pipeline connecting the acyl chloride reaction kettle (2) and the gas condenser (3), the pipeline connecting the absorption tank (4) and the acyl chloride reaction kettle (2) and the pipeline connecting the acyl chloride reaction kettle (2) and the carboxylic acid reaction kettle (5) are fixedly provided with manual valves (9); the absorption tank (4) is also fixedly connected with a feeding pipe (15).
5. The apparatus for synthesizing 2-chloropyridine-6-carboxylic acid according to claim 1, wherein: the acyl chloride reaction kettle (2) and the carboxylic acid reaction kettle (5) are fixedly connected with stirring devices.
6. The apparatus for synthesizing 2-chloropyridine-6-carboxylic acid according to claim 5, wherein: acyl chloride reation kettle (2) and carboxylic acid reation kettle (5) all include kettle lid (10) and the cauldron body (11) of detachable connection, kettle lid (10) fixed connection agitating unit.
7. The apparatus for synthesizing 2-chloropyridine-6-carboxylic acid according to claim 6, wherein: the stirring device comprises a motor (12) fixedly connected with the kettle cover (10), an output shaft of the motor (12) extends to the inside of the kettle body (11) and is fixedly connected with a stirring shaft (13), and the stirring shaft (13) is fixedly connected with stirring blades (14).
8. The apparatus for synthesizing 2-chloropyridine-6-carboxylic acid according to claim 6, wherein: the outer parts of the acyl chloride reaction kettle (2) and the carboxylic acid reaction kettle (5) are fixedly sleeved with heat preservation sleeves (17), the heat preservation sleeves (17) fixedly arranged outside the acyl chloride reaction kettle (2) are fixedly connected with the kettle body (11) of the acyl chloride reaction kettle (2), and heat preservation cavities are formed between the heat preservation sleeves (17) fixedly arranged outside the acyl chloride reaction kettle (2) and the kettle body (11) of the acyl chloride reaction kettle (2); the heat preservation sleeve (17) fixedly arranged outside the carboxylic acid reaction kettle (5) is fixedly connected with the kettle body (11) of the carboxylic acid reaction kettle (5), and a heat preservation cavity is formed between the heat preservation sleeve (17) fixedly arranged outside the carboxylic acid reaction kettle (5) and the kettle body (11) of the carboxylic acid reaction kettle (5); a heat-source inlet pipe (18) and a heat-source outlet pipe (19) are fixedly connected with a heat-insulating sleeve (17) fixedly arranged outside the acyl chloride reaction kettle (2); the heat source inlet pipe (18) is fixedly connected and communicated with the steam inlet pipe (7), and the heat source outlet pipe (19) is fixedly connected and communicated with the steam outlet pipe (8); the heat preservation sleeve (17) fixedly arranged outside the carboxylic acid reaction kettle (5) is fixedly connected with the water inlet pipe (20) and the water outlet pipe (21), the water inlet pipe (20) and the water outlet pipe (21) are respectively fixedly connected with the water storage tank (22), and the water inlet pipe (20) is also fixedly connected with the water pump (23).
9. The apparatus for synthesizing 2-chloropyridine-6-carboxylic acid according to claim 8, wherein: the heat source inlet pipe (18) is fixedly connected with the lower end of the heat preservation sleeve (17), and the heat source outlet pipe (19) is fixedly connected with the upper end of the heat preservation sleeve (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322623102.6U CN220990758U (en) | 2023-09-27 | 2023-09-27 | Synthesis device of 2-chloropyridine-6-carboxylic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322623102.6U CN220990758U (en) | 2023-09-27 | 2023-09-27 | Synthesis device of 2-chloropyridine-6-carboxylic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220990758U true CN220990758U (en) | 2024-05-24 |
Family
ID=91127899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322623102.6U Active CN220990758U (en) | 2023-09-27 | 2023-09-27 | Synthesis device of 2-chloropyridine-6-carboxylic acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220990758U (en) |
-
2023
- 2023-09-27 CN CN202322623102.6U patent/CN220990758U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109382064A (en) | Waste gas recovering device and recovery method in a kind of naphthalene water reducer production process | |
| CN109608353B (en) | Continuous production process and device for m-aminoacetanilide | |
| CN105754724A (en) | Method for direct conversion of plant soapstock into fatty acid | |
| CN201988366U (en) | Continuous subcritical water tube type reaction apparatus | |
| CN220990758U (en) | Synthesis device of 2-chloropyridine-6-carboxylic acid | |
| CN206688691U (en) | Prepare the reactor and system of sulfamic acid | |
| CN112521424A (en) | Device and method for ammonia neutralization reaction of sucralose | |
| CN110229060B (en) | Preparation method of food-grade sodium diacetate | |
| CN104174436A (en) | Barium sulfonate catalyst and application thereof in synthesis of D,L-P-hydroxyphenyl hydantoin | |
| CN112790416B (en) | Efficient conditioning device and conditioning method for compound pellet feed | |
| CN109382055A (en) | The device and reaction method of sulfonating reaction efficiency in a kind of raising naphthalene series high-efficiency water-reducing agent | |
| CN210434025U (en) | Improved generation secondary cooling crystallization device | |
| CN105461565A (en) | Method for producing nitroacetophenone | |
| CN207313481U (en) | The production system of the continuous sulfonation of naphthalene | |
| CN207786592U (en) | A kind of dynamic crystallization prepares the device of lithium hexafluoro phosphate | |
| CN102659565B (en) | Continuous preparation method for phytocide 2,4-D acid | |
| CN211463090U (en) | Methyl mercaptan reaction system | |
| CN208990814U (en) | A kind of cooling and stirring reaction kettle | |
| CN202387465U (en) | Large adipic acid reactor | |
| CN220573470U (en) | Reaction kettle for producing liquid fertilizer | |
| CN217120288U (en) | Continuous preparation production system for acyl chloride products | |
| CN218166950U (en) | 2-mercaptothiazoline cyclization reaction continuous automatic production device | |
| CN210787360U (en) | A semi-sealed ground paste reation kettle for producing slurry method fertilizer | |
| CN106000267B (en) | A kind of adipic acid synthesizer and its application method | |
| CN218810524U (en) | Desulfurizing liquid evaporation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |