CN221014870U - Catalyst centrifugal separation device for dimethylcyclohexylamine production - Google Patents
Catalyst centrifugal separation device for dimethylcyclohexylamine production Download PDFInfo
- Publication number
- CN221014870U CN221014870U CN202322567137.2U CN202322567137U CN221014870U CN 221014870 U CN221014870 U CN 221014870U CN 202322567137 U CN202322567137 U CN 202322567137U CN 221014870 U CN221014870 U CN 221014870U
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- cylinder
- box body
- dimethylcyclohexylamine
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- 238000000926 separation method Methods 0.000 title claims abstract description 41
- 239000003054 catalyst Substances 0.000 title claims abstract description 24
- SVYKKECYCPFKGB-UHFFFAOYSA-N N,N-dimethylcyclohexylamine Chemical compound CN(C)C1CCCCC1 SVYKKECYCPFKGB-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 14
- 239000004744 fabric Substances 0.000 abstract description 13
- 239000002994 raw material Substances 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 6
- 238000001914 filtration Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000012824 chemical production Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011949 solid catalyst Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000564 Raney nickel Inorganic materials 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Landscapes
- Centrifugal Separators (AREA)
Abstract
The utility model discloses a catalyst centrifugal separation device for producing dimethylcyclohexylamine, which comprises a supporting plate, wherein a box body is fixedly arranged on the supporting plate, a driving motor is fixedly arranged at the bottom end of the box body, a separation cylinder is fixedly connected to a rotating shaft of the driving motor, the separation cylinder is positioned in the box body, and a filter hole is formed in the outer side of the separation cylinder. According to the utility model, the filter element piece is arranged in the separating cylinder, so that the filter element cloth bag can be positioned on one side of the inner wall of the separating cylinder, and the loop bar can be tightly attached to the inner wall of the separating cylinder, so that a worker can pour chemical raw materials into the inner wall of the filter element cloth bag, and the driving motor is started to drive the separating cylinder to rotate, so that the chemical raw materials can be effectively subjected to solid-liquid separation.
Description
Technical Field
The utility model relates to the technical field of separation of chemical materials, in particular to a catalyst centrifugal separation device for producing dimethylcyclohexylamine.
Background
In the production process of the dimethylcyclohexylamine, raw materials and hydrogen react in a reaction kettle, a granular binary Raney nickel catalyst is adopted for catalytic reaction, a finished product after the reaction is recovered in a distillation mode and the like, high-boiling residues, residues of the raw materials and solvents and the catalyst in the reaction kettle are required to be separated out and recycled, and the conventional mode is to adopt a centrifugal separation mode, and the residual waste liquid in the reaction kettle is discharged from a drain outlet at the bottom of the reaction kettle and is sent into a centrifugal separator for separation.
According to a centrifugal separation device for chemical production of publication No. CN213885244U, relate to chemical production technical field. This catalyst centrifugal separation device is used in dimethyl cyclohexylamine production for chemical production, the power distribution box comprises a box body, the inside of box is provided with the separating drum, a plurality of filtration holes have been seted up to the circumference of separating drum, the lower extreme fixedly connected with pivot of separating drum, the lower extreme of pivot rotates the lower extreme that runs through the box, the lower extreme fixedly connected with motor of pivot, the circumference of motor passes through the lower extreme fixed connection of two mounts and box, the lower extreme of box is located the outlet pipe of its inner chamber of right side fixedly connected with intercommunication of motor, the top cap is installed to the box upper end, the upper end of separating drum is pegged graft in the lower extreme of top cap. This catalyst centrifugal separation device for chemical production is used in dimethyl cyclohexylamine production through setting up ejector pin, top billiard ball, spring, drum and scraper blade, has reached the effect of automatic clearance to the inner wall of separating tube after the centrifugation is accomplished, has solved the centrifugation and has accomplished the back solid particle and can block up the filtration pore, the inconvenient problem of clear up of manual work, but the device still has some problems in the use, after the chemical raw materials is in separating tube inside and carries out solid-liquid separation work, the solid raw materials that forms is piled up the form and is in the inside of separating tube, thereby be inconvenient for personnel to carry out cleaning up it, directly adopt the separating tube to carry out separation work simultaneously, can appear that some solid raw materials block up in the filtration pore, and then influence the separation efficiency to solid-liquid, for this we have proposed catalyst centrifugal separation device for dimethyl cyclohexylamine production and have solved above-mentioned problem.
Disclosure of Invention
The utility model aims to provide a catalyst centrifugal separation device for producing dimethylcyclohexylamine, so as to solve the problems in the background art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the catalyst centrifugal separation device for the production of the dimethylcyclohexylamine comprises a supporting plate, wherein a box body is fixedly arranged on the supporting plate, a driving motor is fixedly arranged at the bottom end of the box body, a separating cylinder is fixedly connected to a rotating shaft of the driving motor and is positioned in the box body, a filtering hole is formed in the outer side of the separating cylinder, a cover plate is abutted to the top end of the box body, a discharging pipe is fixedly arranged at the bottom end of the box body, a filter element piece is arranged in the separating cylinder, and a drying mechanism is arranged on the lower surface of the cover plate;
The filter element comprises a bottom plate, the bottom plate is inserted and is located in the inside of separating drum, fixed surface installs the bracing piece on the bottom plate, the bracing piece is inserted and is located in the round hole is inside, the round hole is seted up in the loop bar, the outside fixed mounting of loop bar has the filter core sack, the filter core sack centers on the separating drum inner wall, the loop bar top is contradicted and is had the top ring board, the perforation has been seted up in the top ring board, it has the bracing piece to run through in the perforation, the bracing piece has the nut through threaded engagement, the outside of separating drum is seted up flutedly, the recess interpolation is equipped with the connecting plate, connecting plate fixed mounting is on the outside of top ring board, fixed mounting has the screw rod in the recess, the screw rod passes the connecting plate and has the nut through threaded engagement.
As a further preferable mode of the technical scheme, the supporting rods are equidistantly distributed on the upper surface of the bottom plate, and the supporting rods are fit in the inner portions of the round holes.
As a further preferable mode of the technical scheme, the loop bar is abutted against the inner wall of the separating cylinder, the top end of the separating cylinder is higher than the top end of the top ring plate, and the top ring plate is attached to the inner wall of the separating cylinder.
As a further preferable mode of the technical scheme, the thread engaged between the supporting rod and the nut and the thread engaged between the nut and the screw rod are in fine thread engaged connection.
As the further preference of this technical scheme, drying mechanism includes the cylinder, cylinder fixed mounting is in apron upper surface department, cylinder stretches out end fixedly connected with annular plate, annular plate is in apron lower surface department, annular plate inner wall and outside all fixed mounting have U type frame, U type frame equidistance distributes on annular plate inner wall is last outside, U type frame inner wall fixed mounting has the heating rod, the heating rod is in on box inner wall and the separating drum outside.
As a further preferable mode of the technical scheme, an inner cavity is formed in the annular plate, fans are fixedly arranged above the inner cavity and distributed on the annular plate at equal intervals, and an air outlet is formed in the inner wall of the inner cavity.
As a further preferable mode of the technical scheme, the air outlets are equidistantly distributed on the inner wall of the inner cavity, and the air outlets are positioned at one side of the heating rod.
The utility model provides a catalyst centrifugal separation device for producing dimethylcyclohexylamine, which has the following beneficial effects:
According to the utility model, the filter element piece is arranged in the separating cylinder, so that the filter element cloth bag can be positioned on one side of the inner wall of the separating cylinder, the loop bar can be clung to the inner wall of the separating cylinder, the waste liquid containing the catalyst is poured into the inner wall of the filter element cloth bag, and the driving motor is started to drive the separating cylinder to rotate, so that the waste liquid can be effectively subjected to solid-liquid separation, the structure can effectively prevent solid catalyst particles from being blocked in the filter hole, the solid-liquid separation efficiency is improved to a certain extent, and the catalyst is cleaned and recovered later.
The drying mechanism is arranged on the lower surface of the cover plate, after the inside of the box body is washed by water, the annular plate can be driven to descend along with the starting of the air cylinder, so that the heating rod can generate heat through the starting, the heating rod can dry the inside of the box body, and meanwhile, the water mark contained on the inner wall of the box body and the outer side of the separating cylinder can be eliminated.
Drawings
FIG. 1 is a schematic elevational view of the structure of the present utility model;
FIG. 2 is a schematic elevational cross-sectional view of the structure of the present utility model;
FIG. 3 is a schematic top view of the filter core cloth bag of the present utility model;
FIG. 4 is a right side view schematically showing the structure of the support rod and the filter core cloth bag in a separated state;
Fig. 5 is an enlarged schematic view of the structure a of fig. 2 according to the present utility model.
In the figure: 1. a support plate; 2. a case; 3. a driving motor; 4. a separation cylinder; 5. filtering holes; 6. a cover plate; 7. a discharge pipe; 8. a filter element; 9. a drying mechanism; 10. a bottom plate; 11. a support rod; 12. a round hole; 13. a loop bar; 14. a filter element cloth bag; 15. a top ring plate; 16. perforating; 17. a nut; 18. a groove; 19. a connecting plate; 20. a screw; 21. a cylinder; 22. an annular plate; 23. a U-shaped frame; 24. a heating rod; 25. an inner cavity; 26. a fan; 27. and an air outlet.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
The utility model provides the technical scheme that: as shown in fig. 1, fig. 2, fig. 3 and fig. 4, in this embodiment, the catalyst centrifugal separation device for dimethylcyclohexylamine production comprises a support plate 1, a box body 2 is fixedly installed on the support plate 1, a driving motor 3 is fixedly installed at the bottom end of the box body 2, a separation cylinder 4 is fixedly connected to a rotating shaft of the driving motor 3, the separation cylinder 4 is located in the box body 2, a filtering hole 5 is formed in the outer side of the separation cylinder 4, a cover plate 6 is abutted to the top end of the box body 2, a discharging pipe 7 is fixedly installed at the bottom end of the box body 2, a filter element 8 is arranged in the separation cylinder 4, a drying mechanism 9 is arranged on the lower surface of the cover plate 6, the filter element 8 comprises a bottom plate 10, the bottom plate 10 is inserted into the separation cylinder 4, a supporting rod 11 is fixedly installed on the upper surface of the bottom plate 10, the supporting rod 11 is inserted into a round hole 12, the round hole 12 is arranged in the loop bar 13, a filter core cloth bag 14 is fixedly arranged on the outer side of the loop bar 13, the filter core cloth bag 14 surrounds the inner wall of the separating cylinder 4, a top ring plate 15 is abutted against the top end of the loop bar 13, a through hole 16 is arranged in the top ring plate 15, a supporting rod 11 penetrates through the through hole 16, the supporting rod 11 is engaged with a nut 17 through threads, a groove 18 is arranged on the outer side of the separating cylinder 4, a connecting plate 19 is inserted in the groove 18, the connecting plate 19 is fixedly arranged on the outer side of the top ring plate 15, a screw rod 20 is fixedly arranged in the groove 18, the screw rod 20 penetrates through the connecting plate 19 and is engaged with the nut 17 through threads, the filter core cloth bag 14 can be positioned on one side of the inner wall of the separating cylinder 4 through the arrangement of the filter core piece 8, the loop bar 13 can be tightly attached to the inner wall of the separating cylinder 4, thereby personnel empty industrial chemicals in filter core sack 14 are inside for driving motor 3 starts and drives separating drum 4 and rotate in, can effectively carry out solid-liquid separation work to the waste liquid, and this structure can effectively avoid being solid-state catalyst and block up in the filtration pore 5 is inside, and then improves solid-liquid separation efficiency to a certain extent, and follow-up to the recovery of catalyst, personnel can directly take out the work from separating drum 4 in it, bracing piece 11 equidistance distributes in the upper surface of bottom plate 10, bracing piece 11 agrees with in the inside of round hole 12, so that round hole 12 cup joints on the outside of bracing piece 11, thereby filter core sack 14 can be around being in the top position department of bottom plate 10, loop bar 13 contradicts on the inner wall of separating drum 4, separating drum 4 top is higher than the top of top ring plate 15, top ring plate 15 laminating is on the inner wall of separating drum 4, can help the personnel place top ring plate 15 in the inside of separating drum 4, and follow-up take out the bottom plate 10 from the inside of separating drum 4 and work, the fine thread engagement can be adopted between 17 and the adoption thread connection fine thread screw thread screw thread engagement between 17 and 20.
As shown in fig. 2 and 5, the drying mechanism 9 includes a cylinder 21, the cylinder 21 is fixedly installed on the upper surface of the cover plate 6, the extension end of the cylinder 21 is fixedly connected with an annular plate 22, the annular plate 22 is located on the lower surface of the cover plate 6, the inner wall and the outer side of the annular plate 22 are fixedly installed with U-shaped frames 23, the U-shaped frames 23 are equidistantly distributed on the upper outer side of the inner wall of the annular plate 22, the inner wall of the U-shaped frames 23 is fixedly installed with a heating rod 24, the heating rod 24 is located on the inner wall of the box 2 and the outer side of the separating cylinder 4, the drying mechanism 9 is arranged on the lower surface of the cover plate 6, after the interior of the box 2 is flushed by water by the subsequent personnel, the annular plate 22 can be driven to descend along with the starting of the cylinder 21, so that the heating rod 24 can generate heat through starting, and the heating rod 24 can dry, sterilize the interior of the box 2, meanwhile, the water mark on the inner wall of the box body 2 and the outer side of the separating cylinder 4 can be eliminated, so that the subsequent separating work of the device is not influenced, an inner cavity 25 is formed in the annular plate 22, a fan 26 is fixedly arranged above the inner cavity 25, the fans 26 are equidistantly distributed on the annular plate 22, an air outlet 27 is formed in the inner wall of the inner cavity 25, the air outlet 27 is equidistantly distributed on the inner wall of the inner cavity 25, the air outlet 27 is positioned at one side of the heating rod 24, after the heating rod 24 generates heat, the air force generated by the fan 26 can flow in the inner cavity 25 through the starting of the fan 26, and then flow to the outside through the air outlet 27, so that the heat generated by the heating rod 24 is dispersed in the inner part of the box body 2, further enhancing the dissipation of heat in the interior of the tank 2.
The utility model provides a catalyst centrifugal separation device for producing dimethylcyclohexylamine, which has the following specific working principle:
In the use of the device, the round hole 12 arranged on the loop bar 13 is inserted on the outer side of the supporting rod 11, so that the bottom end of the loop bar 13 is abutted against the upper surface of the bottom plate 10, namely, the filter core cloth bag 14 surrounds the upper position of the bottom plate 10, then the through hole 16 arranged on the top ring plate 15 is inserted on the outer side of the supporting rod 11, so that the top ring plate 15 is abutted against the top end of the loop bar 13, then the top end of the supporting rod 11 is in threaded engagement with the nut 17, the position of the filter core cloth bag 14 can be fixed, the bottom plate 10 is placed in the inside of the separating cylinder 4, the connecting plate 19 fixedly arranged on the outer side of the top ring plate 15 is inserted in the groove 18, the position of the bottom plate 10 can be fixed through the threaded engagement between the screw rod 20 and the nut 17, then a person can pour chemical raw materials into the separating cylinder 4, namely, the chemical raw materials are positioned on the upper surface of the bottom plate 10 and the inside the filter core cloth bag 14, the driving motor 3 is started to drive the separating cylinder 4 to rotate, so that the solid-liquid separation of the waste liquid can be carried out, the subsequent liquid can be discharged into the box body 2 through the discharging pipe 7, the bottom plate 10 is taken out from the separating cylinder 4, the solid catalyst can be taken out, after the subsequent personnel washes the box body 2 through water, the annular plate 22 can be driven to descend along with the starting of the air cylinder 21, the heating rod 24 can generate heat through the starting, the heating rod 24 can further carry out the drying, sterilizing and disinfecting operation on the box body 2, meanwhile, the water mark contained on the inner wall of the box body 2 and the outer side of the separating cylinder 4 can be eliminated, meanwhile, the air supply operation can be carried out to the inner cavity 25 along with the starting of the fan 26, so that the air can flow the heat emitted by the heating rod 24 to the outside through the air outlet 27, thereby accelerating the rapid dispersion of heat within the interior of the housing 2.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. Catalyst centrifugal separation device is used in dimethylcyclohexylamine production, its characterized in that: the novel filter comprises a supporting plate (1), wherein a box body (2) is fixedly arranged on the supporting plate (1), a driving motor (3) is fixedly arranged at the bottom end of the box body (2), a separating cylinder (4) is fixedly connected to a rotating shaft of the driving motor (3), the separating cylinder (4) is positioned in the box body (2), a filter hole (5) is formed in the outer side of the separating cylinder (4), a cover plate (6) is abutted to the top end of the box body (2), a discharging pipe (7) is fixedly arranged at the bottom end of the box body (2), a filter element (8) is arranged in the separating cylinder (4), and a drying mechanism (9) is arranged on the lower surface of the cover plate (6);
The filter element piece (8) comprises a bottom plate (10), in the inside of separating drum (4) is inserted to bottom plate (10), fixed surface installs bracing piece (11) on bottom plate (10), in round hole (12) are inserted to bracing piece (11), round hole (12) are seted up in loop bar (13), the outside fixed mounting of loop bar (13) has filter core sack (14), filter core sack (14) are around on separating drum (4) inner wall, the conflict of loop bar (13) top has top ring plate (15), offer perforation (16) in top ring plate (15), run through in perforation (16) has bracing piece (11), bracing piece (11) have nut (17) through the screw thread engagement, recess (18) are seted up in the outside of separating drum (4), recess (18) are equipped with connecting plate (19) in the interpolation, connecting plate (19) fixed mounting is on the outside of top ring plate (15), screw (20) are installed to recess (18) internal fixation, screw (20) have through screw thread engagement (17) through the screw thread engagement.
2. The catalyst centrifugal separation device for producing dimethylcyclohexylamine according to claim 1, characterized in that: the supporting rods (11) are equidistantly distributed on the upper surface of the bottom plate (10), and the supporting rods (11) are fit in the round holes (12).
3. The catalyst centrifugal separation device for producing dimethylcyclohexylamine according to claim 1, characterized in that: the sleeve rod (13) is abutted to the inner wall of the separating cylinder (4), the top end of the separating cylinder (4) is higher than the top end of the top ring plate (15), and the top ring plate (15) is attached to the inner wall of the separating cylinder (4).
4. The catalyst centrifugal separation device for producing dimethylcyclohexylamine according to claim 1, characterized in that: the threads meshed between the supporting rod (11) and the nut (17) and between the nut (17) and the screw (20) are in fine thread meshed connection.
5. The catalyst centrifugal separation device for producing dimethylcyclohexylamine according to claim 1, characterized in that: the drying mechanism (9) comprises an air cylinder (21), the air cylinder (21) is fixedly arranged at the upper surface of the cover plate (6), the extending end of the air cylinder (21) is fixedly connected with an annular plate (22), the annular plate (22) is positioned at the lower surface of the cover plate (6), U-shaped frames (23) are fixedly arranged on the inner wall and the outer side of the annular plate (22), the U-shaped frames (23) are equidistantly distributed on the outer side of the inner wall of the annular plate (22), heating rods (24) are fixedly arranged on the inner wall of the U-shaped frames (23), and the heating rods (24) are positioned on the inner wall of the box body (2) and the outer side of the separating cylinder (4).
6. The centrifugal separation device for a catalyst for producing dimethylcyclohexylamine according to claim 5, characterized in that: an inner cavity (25) is formed in the annular plate (22), fans (26) are fixedly arranged above the inner cavity (25), the fans (26) are equidistantly distributed on the annular plate (22), and an air outlet (27) is formed in the inner wall of the inner cavity (25).
7. The catalyst centrifugal separation device for producing dimethylcyclohexylamine according to claim 6, characterized in that: the air outlets (27) are equidistantly distributed on the inner wall of the inner cavity (25), and the air outlets (27) are positioned at one side of the heating rod (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322567137.2U CN221014870U (en) | 2023-09-21 | 2023-09-21 | Catalyst centrifugal separation device for dimethylcyclohexylamine production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322567137.2U CN221014870U (en) | 2023-09-21 | 2023-09-21 | Catalyst centrifugal separation device for dimethylcyclohexylamine production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221014870U true CN221014870U (en) | 2024-05-28 |
Family
ID=91132416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322567137.2U Active CN221014870U (en) | 2023-09-21 | 2023-09-21 | Catalyst centrifugal separation device for dimethylcyclohexylamine production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221014870U (en) |
-
2023
- 2023-09-21 CN CN202322567137.2U patent/CN221014870U/en active Active
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