CN220496361U - Synthetic reaction kettle - Google Patents
Synthetic reaction kettle Download PDFInfo
- Publication number
- CN220496361U CN220496361U CN202321983107.3U CN202321983107U CN220496361U CN 220496361 U CN220496361 U CN 220496361U CN 202321983107 U CN202321983107 U CN 202321983107U CN 220496361 U CN220496361 U CN 220496361U
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- reaction kettle
- kettle body
- filtering structure
- wall surface
- liquid
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 89
- 238000001914 filtration Methods 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000004140 cleaning Methods 0.000 claims abstract description 16
- 239000000706 filtrate Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims description 38
- 238000007599 discharging Methods 0.000 claims description 14
- 238000003786 synthesis reaction Methods 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000011347 resin Substances 0.000 abstract description 25
- 229920005989 resin Polymers 0.000 abstract description 25
- 239000000057 synthetic resin Substances 0.000 abstract description 10
- 229920003002 synthetic resin Polymers 0.000 abstract description 10
- 238000012986 modification Methods 0.000 abstract description 8
- 230000004048 modification Effects 0.000 abstract description 8
- 239000007795 chemical reaction product Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000003541 multi-stage reaction Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000004005 microsphere Substances 0.000 description 3
- 238000006011 modification reaction Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 239000012539 chromatography resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 238000001042 affinity chromatography Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000007806 chemical reaction intermediate Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000003761 preservation solution Substances 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The application discloses a synthetic reaction kettle, which relates to the technical field of resin modification and comprises a reaction kettle body and a filtering structure with filtering holes; the filtering structure is arranged in the reaction kettle body and is used for dividing the interior of the reaction kettle body into a material cavity and a liquid cavity; a discharge hole is arranged at the bottom of the material cavity; the reaction kettle body is provided with a discharge valve connected with the discharge port and used for controlling the opening and closing of the discharge port; a liquid outlet is arranged at the bottom of the liquid cavity; the reaction kettle body is provided with a liquid discharge valve connected with the liquid outlet and used for controlling the opening and closing of the liquid outlet. The reaction kettle can separate the synthetic resin from the filtrate, realize continuous cleaning and reaction in the resin modification multi-step reaction process, and can discharge the synthetic resin and the filtrate respectively, thereby facilitating the collection of reaction products.
Description
Technical Field
The application relates to the technical field of resin modification, in particular to a synthetic reaction kettle.
Background
The polymer microsphere resin has very wide application in chemical industry, environment and biological fields, and common resin microspheres comprise polystyrene microspheres, polyvinyl alcohol, crosslinked polysaccharide and the like, and the mechanical strength and chemical resistance of the resin can be optimized through chemical modification. The resin can also have various different characteristics by grafting modification on the surface of the resin so as to realize special purposes, such as macroporous adsorption resin, ion exchange resin, hydrophobic chromatography resin, affinity chromatography resin and the like.
The existing resin synthesis modification generally uses a common reaction kettle without a filtering structure, materials are required to be completely transferred out for cleaning after the synthesis reaction is finished, and most of resin modification reactions are multi-step reactions, and the resin modification reactions are repeatedly removed for cleaning during specific operation, so that the process is complex and causes a lot of inconvenience. The existing solid-phase reaction kettle for polypeptide synthesis can be used for cleaning resin in the kettle body by adding the filter plate in the kettle body, and can be used for resin modification synthesis reaction, but the kettle body is required to be opened to take out the reacted resin, so that the resin is inconvenient to discharge.
Disclosure of Invention
In view of this, the purpose of this application is to provide a synthetic reation kettle to solve the technical problem that current reation kettle of taking the filtration its blowing of resin of being inconvenient for.
In order to achieve the technical purpose, the application provides a synthetic reaction kettle, which comprises a reaction kettle body and a filtering structure with filtering holes;
the filtering structure is arranged in the reaction kettle body and is used for separating the reaction kettle body into a material cavity and a liquid cavity;
a discharge hole is formed in the bottom of the material cavity;
the reaction kettle body is provided with a discharge valve connected with the discharge port and used for controlling the discharge port to be opened and closed;
a liquid outlet is formed in the bottom of the liquid cavity;
the reaction kettle body is provided with a liquid discharge valve connected with the liquid outlet and used for controlling the opening and closing of the liquid outlet.
Further, the filtering structure is arranged at the inner bottom of the reaction kettle body, and the shape of the filtering structure is matched with the inner bottom of the reaction kettle body;
the liquid cavity is enclosed between the outer wall surface of the filtering structure and the wall surface of the inner bottom of the reaction kettle body;
the material cavity is formed by enclosing the inner wall surface of the filtering structure and the inner wall surface of the reaction kettle body above the filtering structure;
the discharging valve is arranged at the bottom of the reaction kettle body.
Further, the reaction kettle body comprises a kettle body, a kettle bottom and a kettle cover;
the kettle bottom is connected to the bottom of the kettle body and is in an inverted cone shape;
the kettle cover is connected to the top of the kettle body;
the filtering structure is in an inverted cone shape and is matched with the shape of the kettle bottom;
the top of the filtering structure is connected with the inner wall surface of the kettle body or the inner wall surface of the kettle bottom;
and a gap is formed between the outer wall surface of the filtering structure and the inner wall surface of the kettle bottom.
Further, the discharge valve is an up-down expansion type discharge valve.
Further, the kettle bottom is provided with a diversion trench on the inner wall surface positioned in the liquid cavity;
the diversion trench is used for draining filtrate to the liquid outlet;
the outer wall surface of the filtering structure is contacted with the diversion trench.
Further, the reaction kettle body is also provided with an observation window.
Further, the stirring device also comprises a stirring mechanism;
the stirring mechanism is arranged on the reaction kettle body and is used for stirring materials in the material cavity.
Further, a stirring port is arranged on the kettle cover;
the stirring mechanism comprises a driving motor and a stirring shaft;
the stirring shaft is rotationally inserted on the stirring port;
one end of the stirring shaft extending into the material cavity is provided with a blade;
the output end of the driving motor is connected with one end of the stirring shaft extending out of the stirring port and used for driving the stirring shaft to rotate.
Further, the kettle cover is also provided with a solid feed port, a cleaning liquid feed port, a spraying port and an emptying port.
Further, a thermo-well tube is also arranged on the kettle cover.
According to the technical scheme, the reaction kettle is designed, the filtering structure with the filtering holes is arranged inside the reaction kettle body, the reaction kettle body is divided into the material cavity and the liquid cavity, the material cavity is provided with the discharge hole, and the independent opening and closing control is realized by using the discharge valve arranged on the reaction kettle body; correspondingly, a liquid outlet is formed in the liquid cavity, and the liquid discharge valve arranged on the reaction kettle body is utilized to realize independent opening and closing control. The reaction kettle can separate the synthetic resin from the filtrate, realize continuous cleaning and reaction in the resin modification multi-step reaction process, and can discharge the synthetic resin and the filtrate respectively, thereby facilitating the collection of reaction products.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a synthesis reaction vessel provided in the present application;
in the figure: 101. a material cavity; 102. a liquid chamber; 1. a reaction kettle body; 11. a kettle cover; 12. a kettle body; 13. a kettle bottom; 2. a filtering structure; 31. a discharging valve; 311. a screw; 32. a drain valve; 41. a stirring shaft; 411. a paddle; 42. a driving motor; 51. an observation window; 52. a cleaning liquid feed port; 53. a thermo-well tube; 54. a solid feed port; 55. a spray port; 56. and an evacuation port.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the embodiments of the present application, are within the scope of the embodiments of the present application.
In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.
The embodiment of the application discloses a synthetic reaction kettle.
Referring to fig. 1, an embodiment of a synthesis reaction kettle provided in an embodiment of the present application includes:
the reaction kettle body 1 and the filtering structure 2 with the filtering holes, wherein the aperture of the filtering holes is smaller than the particle size of the synthetic resin product, and the filtering holes can be designed in a changing way according to actual conditions.
The filtering structure 2 is installed inside the reaction kettle body 1 and is used for dividing the inside of the reaction kettle body 1 into a material cavity 101 and a liquid cavity 102. The synthetic resin undergoes a modification reaction in the material chamber 101, and the filtrate produced in the process passes through the filter structure 2 and enters the liquid chamber 102.
A discharge port is arranged at the bottom of the material cavity 101, and a discharge valve 31 which is connected with the discharge port and used for controlling the opening and closing of the discharge port is arranged on the reaction kettle body 1; the independent opening and closing control is realized by using the discharging valve 31 arranged on the reaction kettle body 1, so that the discharging collection of the synthetic resin is facilitated.
A liquid outlet is arranged at the bottom of the liquid cavity 102, and a liquid discharge valve 32 which is connected with the liquid outlet and used for controlling the opening and closing of the liquid outlet is arranged on the reaction kettle body 1; independent opening and closing control is realized by using a drain valve 32 arranged on the reaction kettle body 1, so that the filtrate is conveniently discharged and collected.
The foregoing is an embodiment one of a synthesis reaction kettle provided in the embodiments of the present application, and the following is an embodiment two of a synthesis reaction kettle provided in the embodiments of the present application, specifically please refer to fig. 1.
Based on the scheme of the first embodiment:
further, in order to ensure that the formed material cavity 101 has enough space, and the discharging valve 31 and the discharging valve 32 are conveniently arranged at the bottom of the reaction kettle body 1, the filtering structure 2 is arranged at the inner bottom of the reaction kettle body 1, and the shape is matched with the inner bottom of the reaction kettle body 1, namely, the shape of the filtering structure 2 is adaptively changed and designed according to the different shapes of the inner bottom of the reaction kettle body 1.
A liquid cavity 102 is formed between the outer wall surface of the filtering structure 2 and the wall surface of the inner bottom of the reaction kettle body 1, and a material cavity 101 is formed between the inner wall surface of the filtering structure 2 and the inner wall surface of the reaction kettle body 1 above the filtering structure.
Further, in terms of the design of the reaction kettle body 1, the reaction kettle comprises a kettle body 12, a kettle bottom 13 and a kettle cover 11.
The kettle body 12 can be cylindrical, the kettle bottom 13 is connected to the bottom of the kettle body 12, and is in a reverse taper shape, and the kettle bottom 13 and the kettle body 12 are integrally connected/integrally formed.
The kettle cover 11 is connected to the top of the kettle body 12, and can be detachably connected through fasteners such as bolts, and can be designed with reference to the existing reaction kettle structure without limitation.
Taking the kettle bottom 13 as an example, the filtering structure 2 is in a reverse cone shape, and is adapted to the shape of the kettle bottom 13, the top of the filtering structure 2 is connected with the inner wall surface of the kettle body 12 or the inner wall surface of the kettle bottom 13, and a gap is formed between the outer wall surface of the filtering structure 2 and the inner wall surface of the kettle bottom 13, so as to ensure that a corresponding liquid cavity 102 can be formed between the outer wall surface of the filtering structure 2 and the inner wall surface of the inner bottom of the reaction kettle body 1.
The bottom of the filtering structure 2 can also be suspended above the bottom of the kettle bottom 13, so that a connecting pipe is needed to connect the discharge valve 31 and the discharge port.
For convenient connection with the discharge valve 31, a better support is formed for the filter structure 2, the bottom of the filter structure 2 is preferably connected with the bottom of the kettle bottom 13, the corresponding discharge hole is arranged at the center of the bottom of the filter structure 2, and the discharge valve 31 connected with the discharge hole is arranged at the bottom of the kettle bottom 13.
Further, the discharge valve 31 is a conventional up-and-down expansion discharge valve 31 in the market, and the screw 311 is operated to drive the plug in the discharge valve 31 to move up and down, so as to control the opening and closing of the discharge port.
Further, the tank bottom 13 is provided with a diversion trench (not shown) on an inner wall surface located in the liquid cavity 102, and the diversion trench is used for diversion of filtrate to a liquid outlet. It can be understood that the inner bottom of the reaction kettle body 1 is of an inverted cone design, and the inner wall surface for forming the liquid cavity 102 is also provided with a diversion trench.
In terms of the formation of the diversion trench, a plurality of convex ribs can be arranged on the inner wall surface, the diversion trench is formed between the adjacent convex ribs, the outer wall surface of the filtering structure 2 can be in contact with the diversion trench, namely, the filtering structure 2 is arranged on the diversion trench, so that the filtering structure 2 can be supported by the diversion trench, and the strength of the filtering structure 2 is improved. The filtrate can enter the diversion trench after coming out through the filtering structure 2 and is converged to the liquid outlet through the diversion trench. Compared with the traditional design of the arc-shaped kettle bottom 13, the design of the inverted cone-shaped kettle bottom 13 is combined with the diversion trench, so that the number of residual reaction liquid in the kettle is smaller, the material liquid can be saved, and the feeding proportion can be controlled better.
Further, the reaction kettle body 1 is also provided with an observation window 51 for observing the separation condition of the synthetic resin and the liquid.
Further, in order to achieve a better reaction effect, the reaction kettle further comprises a stirring mechanism, wherein the stirring mechanism is arranged on the reaction kettle body 1 and is used for stirring materials in the material cavity 101.
Further, the kettle cover 11 is provided with a stirring port (not shown).
The stirring mechanism comprises a driving motor 42 and a stirring shaft 41, the stirring shaft 41 is rotatably inserted on the stirring port, and a blade 411 is installed at one end of the stirring shaft 41 extending into the material cavity 101. The output end of the driving motor 42 is connected with one end of the stirring shaft 41 extending out of the stirring port, and is used for driving the stirring shaft 41 to rotate.
Further, the kettle cover 11 is also provided with a solid feed port 54, a cleaning liquid feed port 52, a spraying port 55 and an emptying port 56.
Further, a thermo-well tube 53 is provided on the kettle cover 11.
The application reation kettle operation is as follows:
1. and (3) resin cleaning: after the resin modification synthesis reaction is completed, the reaction product is cleaned to carry out the subsequent reaction process. The cleaning feed liquid is added from the cleaning liquid feed inlet 52 at the top of the reaction kettle body 1, the reaction resin on the filtering structure 2 is cleaned, if necessary, the feed liquid can be added through the spraying port 55 for auxiliary cleaning, then the filtration is carried out through the filtering structure 2, at this moment, the discharging valve 31 of the reaction kettle body 1 is closed, the discharging valve 32 is opened, and the cleaned feed liquid is discharged through the discharging valve 32, so that the resin cleaning is completed. After the resin is washed, the liquid discharge valve 32 is closed, and raw materials for subsequent reaction are continuously added to carry out the next reaction.
2. And (3) resin discharging: after the synthesis reaction is completed, the synthetic resin in the reaction kettle body 1 is suspended in the preservation solution, at this time, the material valve 31 is opened, and the resin suspension is directly discharged from the material outlet, so that the reaction product can be collected.
The reaction kettle of this design of this application has following beneficial effect:
1. the discharging valve 31 and the discharging valve 32 are respectively and independently connected with the material cavity 101 and the liquid cavity 102, so that the filtrate and the synthetic resin product are respectively collected, and the operation is simple.
2. The filter structure 2 is arranged at the bottom of the reaction kettle body 1, the inside of the reaction kettle body is divided into the material cavity 101 and the liquid cavity 102, so that the in-kettle cleaning of reaction intermediate products can be realized, the subsequent reaction process is directly carried out, the operation steps are reduced, and the reaction efficiency is improved.
3. The kettle bottom 13 is arranged in an inverted cone shape and matched with a diversion trench, compared with the traditional arc kettle bottom 13, the residual reaction liquid is less during cleaning, the material liquid can be saved, and the charging proportion is better controlled.
4. The cooperation design of guiding gutter to filtration 2 can support filtration 2 better, improves filtration 2 intensity.
The foregoing details of a synthesis reaction kettle provided in the present application are described, and those skilled in the art, based on the concepts of the embodiments of the present application, may vary in specific embodiments and application ranges, so that the disclosure should not be construed as limiting the application.
Claims (10)
1. The synthesis reaction kettle is characterized by comprising a reaction kettle body (1) and a filtering structure (2) with filtering holes;
the filtering structure (2) is arranged inside the reaction kettle body (1) and is used for dividing the inside of the reaction kettle body (1) into a material cavity (101) and a liquid cavity (102);
a discharge hole is formed in the bottom of the material cavity (101);
the reaction kettle body (1) is provided with a discharge valve (31) connected with the discharge port and used for controlling the discharge port to be opened and closed;
a liquid outlet is formed in the bottom of the liquid cavity (102);
the reaction kettle body (1) is provided with a liquid discharge valve (32) which is connected with the liquid outlet and used for controlling the opening and closing of the liquid outlet.
2. The synthetic reaction kettle according to claim 1, wherein the filtering structure (2) is mounted at the inner bottom of the reaction kettle body (1) and is matched with the inner bottom of the reaction kettle body (1) in shape;
the liquid cavity (102) is formed by enclosing between the outer wall surface of the filtering structure (2) and the wall surface of the inner bottom of the reaction kettle body (1);
the material cavity (101) is formed by enclosing between the inner wall surface of the filtering structure (2) and the inner wall surface of the reaction kettle body (1) above the filtering structure;
the discharging valve (32) and the discharging valve (31) are arranged at the bottom of the reaction kettle body (1).
3. The synthetic reaction kettle according to claim 2, wherein the reaction kettle body (1) comprises a kettle body (12), a kettle bottom (13) and a kettle cover (11);
the kettle bottom (13) is connected to the bottom of the kettle body (12) and is in an inverted cone shape;
the kettle cover (11) is connected to the top of the kettle body (12);
the filtering structure (2) is in an inverted cone shape and is matched with the shape of the kettle bottom (13);
the top of the filtering structure (2) is connected with the inner wall surface of the kettle body (12) or the inner wall surface of the kettle bottom (13);
a gap is formed between the outer wall surface of the filtering structure (2) and the inner wall surface of the kettle bottom (13).
4. The synthesis reaction kettle according to claim 1, wherein the discharge valve (31) is an up-down expansion type discharge valve (31).
5. A synthesis reaction kettle according to claim 3, wherein the kettle bottom (13) is provided with a diversion trench on the inner wall surface positioned in the liquid cavity (102);
the diversion trench is used for draining filtrate to the liquid outlet;
the outer wall surface of the filtering structure (2) is contacted with the diversion trench.
6. The synthetic reaction kettle according to claim 1, characterized in that the reaction kettle body (1) is further provided with an observation window (51).
7. The synthetic reaction kettle according to claim 3, further comprising a stirring mechanism;
the stirring mechanism is arranged on the reaction kettle body (1) and is used for stirring materials in the material cavity (101).
8. The synthetic reaction kettle according to claim 7, wherein a stirring port is arranged on the kettle cover (11);
the stirring mechanism comprises a driving motor (42) and a stirring shaft (41);
the stirring shaft (41) is rotatably inserted on the stirring port;
one end of the stirring shaft (41) extending into the material cavity (101) is provided with a blade (411);
the output end of the driving motor (42) is connected with one end of the stirring shaft (41) extending out of the stirring port, and the driving motor is used for driving the stirring shaft (41) to rotate.
9. A synthetic reaction kettle according to claim 3, characterized in that the kettle cover (11) is further provided with a solid feed port (54), a cleaning liquid feed port (52), a spraying port (55) and an emptying port (56).
10. A synthetic reaction kettle according to claim 3, characterized in that a thermo-well tube (53) is also provided on the kettle cover (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321983107.3U CN220496361U (en) | 2023-07-26 | 2023-07-26 | Synthetic reaction kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321983107.3U CN220496361U (en) | 2023-07-26 | 2023-07-26 | Synthetic reaction kettle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220496361U true CN220496361U (en) | 2024-02-20 |
Family
ID=89869056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321983107.3U Active CN220496361U (en) | 2023-07-26 | 2023-07-26 | Synthetic reaction kettle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220496361U (en) |
-
2023
- 2023-07-26 CN CN202321983107.3U patent/CN220496361U/en active Active
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