CN213313434U - Benzoic acid purification crystallization device - Google Patents
Benzoic acid purification crystallization device Download PDFInfo
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- CN213313434U CN213313434U CN202022152287.3U CN202022152287U CN213313434U CN 213313434 U CN213313434 U CN 213313434U CN 202022152287 U CN202022152287 U CN 202022152287U CN 213313434 U CN213313434 U CN 213313434U
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- Prior art keywords
- benzoic acid
- crystallization
- water
- tank
- pipe
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- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 239000005711 Benzoic acid Substances 0.000 title claims abstract description 69
- 235000010233 benzoic acid Nutrition 0.000 title claims abstract description 69
- 238000002425 crystallisation Methods 0.000 title claims abstract description 66
- 230000008025 crystallization Effects 0.000 title claims abstract description 66
- 238000000746 purification Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000010438 heat treatment Methods 0.000 claims abstract description 60
- 238000000859 sublimation Methods 0.000 claims abstract description 29
- 230000008022 sublimation Effects 0.000 claims abstract description 29
- 239000000498 cooling water Substances 0.000 claims abstract description 23
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 4
- 239000008236 heating water Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000010865 sewage Substances 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 12
- 239000013078 crystal Substances 0.000 abstract description 10
- 238000000926 separation method Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 5
- 150000003839 salts Chemical class 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 description 9
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001266 acyl halides Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007336 electrophilic substitution reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a benzoic acid purification crystallization device, including water bath heating bucket and crystallization case. Has the advantages that: the utility model adopts the water bath heating barrel, the sublimation tank, the gas pipe and the crystallization box, when the benzoic acid is purified and crystallized, benzoic acid can be added into the sublimation tank through an addition funnel, a heating rod heats the saturated salt water inside a water bath heating barrel to generate a temperature of more than 100 ℃, the benzoic acid is heated through heat conduction and sublimated into gas, and the gas enters the crystallization box through the gas conveying pipe, cold water is introduced into a cooling water tank in the crystallization tank, benzoic acid gas is condensed into crystals again on the top surface of the cooling water tank when meeting cold, the purification and crystallization can be completed, the benzoic acid is sublimated by adopting the water bath heating barrel, the temperature of the staff is convenient to control, and when the benzoic acid is sublimated, impurity remains in the sublimation jar, has avoided traditional heating device easy high temperature to arouse that benzoic acid decomposes or the problem that impurity together sublimes, and it is extravagant to reduce benzoic acid, has improved separation and purification efficiency simultaneously.
Description
Technical Field
The utility model relates to a benzoic acid production technical field particularly, relates to a benzoic acid purification crystallization device.
Background
Benzoic acid is scaly or acicular crystal with the smell of benzene or formaldehyde, sublimes rapidly at 100 ℃, has strong irritation of vapor, is easy to cause cough after being inhaled, is slightly soluble in water, is easy to be soluble in organic solvents such as ethanol, diethyl ether and the like, is weak acid which is stronger than fatty acid, has similar chemical properties, can form salt, ester, acyl halide, amide, anhydride and the like, is not easy to be oxidized, and can generate electrophilic substitution reaction on benzene ring of the benzoic acid to mainly obtain meta-substitution products.
Traditional benzoic acid purification adopts the mode of heating and condensation, adopts the electrical heating during the heating, causes the high benzoic acid that arouses of heating temperature to decompose rotten easily, still arouses the impurity evaporation easily, and inconvenient later stage crystallization separation, simultaneously, the crystallization glues on the crystallization board, needs manual scraping, and too thick crystallization also can shelter from the crystallization board, influences follow-up crystallization process, can also further make the improvement.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a benzoic acid purification crystallization device possesses the advantage that reduces extravagantly, separation and purification is efficient, improve crystallization efficiency, be convenient for collect the benzoic acid crystallization, and then solves the problem among the above-mentioned background art.
(II) technical scheme
For realize above-mentioned reduce extravagant, separation and purification efficient, improve crystallization efficiency, be convenient for collect the advantage of benzoic acid crystallization, the utility model discloses a concrete technical scheme as follows:
the utility model provides a benzoic acid purification crystallization device, includes water bath heating bucket and crystallization box, water bath heating bucket internally mounted has the sublimation jar, and sublimation tank top surface through connection has feed hopper to sublimation tank top surface passes through gas-supply pipe and crystallization box through connection, and crystallization box inside is provided with coolant tank, and coolant tank one side below surface through connection has cold water supply pipe, water bath heating bucket internally mounted has the heating rod, and heating rod one side is located water bath heating bucket top surface and has seted up the bleeder vent to inside saturated salt solution of having held of water bath heating bucket, gas-supply pipe one end is located the coolant tank top and is located the inside through connection of crystallization box and has the shunt tubes, and the vertical downwards of shunt tubes exhaust direction.
Further, crystallization case one side fixed mounting has the cylinder, and the piston rod of cylinder runs through crystallization case one side surface and extends to inside the crystallization case to the piston rod other end fixed mounting of cylinder has the connecting rod, connecting rod one end slant fixedly connected with scraper, and the scraper other end and cooling water tank slip butt, crystallization case opposite side surface mounting has the airtight door.
Furthermore, a heating water tank is installed on one side of the water bath heating barrel, the water outlet end of the heating water tank is communicated with the water inlet end of the delivery pump through a hot water supplementing pipe, and the water outlet end of the delivery pump is communicated with the water bath heating barrel through a hot water supplementing pipe.
Further, sublimation tank top surface through connection has the clear water to supply the pipe, and sublimation tank bottom surface through connection has the blow off pipe to the blow off pipe runs through the water bath heating bucket and extends to the water bath heating bucket outside.
Furthermore, a water outlet pipe is connected to the surface of the upper portion of the other side of the cooling water tank in a penetrating manner, and a switch valve is installed on the surface of the water outlet pipe.
Furthermore, solenoid valves are installed on the surfaces of the clean water replenishing pipe and the sewage draining pipe, and the clean water replenishing pipe is communicated with a clean water source.
(III) advantageous effects
Compared with the prior art, the utility model provides a benzoic acid purification crystallization device possesses following beneficial effect:
(1) the utility model adopts the water bath heating barrel, the sublimation tank, the gas pipe and the crystallization box, when the benzoic acid purification crystallization is carried out, the benzoic acid can be added into the sublimation tank through the feeding funnel, the heating rod heats the saturated salt water in the water bath heating barrel to generate the temperature of more than 100 ℃, the benzoic acid is heated through heat conduction, the benzoic acid is sublimated into gas and enters the crystallization box through the gas pipe, the cooling water tank in the crystallization box is filled with cold water, the benzoic acid gas is condensed into crystals again on the top surface of the cooling water tank when meeting cold, the purification crystallization can be completed, the benzoic acid is sublimated by the water bath heating barrel, the temperature of a worker can be conveniently controlled, the impurities are remained in the sublimation tank when the benzoic acid is sublimated, thereby the impurities are separated, the problem that the benzoic acid is decomposed or the impurities are sublimated together caused by the overhigh temperature of the traditional heating device is, and simultaneously, the separation and purification efficiency is improved.
(2) The utility model discloses a cylinder and scraper, when carrying out the condensation crystallization, the cylinder drives the direction removal of scraper to the airtight door, the scraper strikes off the clean benzoic acid of coolant tank top surface, wait when the crystalline solid of benzoic acid reaches a certain amount, open the airtight door and can collect the benzoic acid crystal, thereby it is more convenient to make benzoic acid collect, and simultaneously, also can expose the coolant tank top surface again when the scraper strikes off the crystal of coolant tank top surface, be convenient for heat-conduction, thereby be convenient for crystallize once more, the crystallization efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a benzoic acid purifying and crystallizing device provided by the present invention;
FIG. 2 is a front view of a benzoic acid purifying and crystallizing device provided by the present invention;
FIG. 3 is a schematic view of the external surface structure of the crystallization box of the present invention.
In the figure:
1. a water bath heating barrel; 2. a sublimation tank; 3. a hot water supply pipe; 4. a delivery pump; 5. heating the water tank; 6. a clear water replenishing pipe; 7. a charging hopper; 8. air holes are formed; 9. a heating rod; 10. a gas delivery pipe; 11. a blow-off pipe; 12. an on-off valve; 13. a cylinder; 14. a water outlet pipe; 15. a connecting rod; 16. a scraper; 17. a cooling water tank; 18. a cold water supplement pipe; 19. a shunt tube; 20. a crystallization box; 21. a sealed door.
Detailed Description
For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.
According to the utility model discloses an embodiment provides a benzoic acid purification crystallization device.
Referring now to the drawings and the detailed description, as shown in fig. 1-3, the benzoic acid purifying and crystallizing device according to the embodiment of the present invention comprises a water bath heating barrel 1 and a crystallizing box 20, wherein a sublimation tank 2 is installed inside the water bath heating barrel 1, the sublimation tank 2 is made of copper, the heat conduction efficiency is improved, a feeding funnel 7 is connected to the top surface of the sublimation tank 2, a sealing cover is installed on the top surface of the feeding funnel 7, the top surface of the sublimation tank 2 is connected to the crystallizing box 20 through a gas pipe 10, the outer surface of the gas pipe 10 is wrapped with heat insulation cotton, the gas cooling crystallization during the gas transmission process is avoided, which is not shown in detail in the drawings, a cooling water tank 17 is arranged inside the crystallizing box 20, a cold water replenishing pipe 18 is connected to the surface below one side of the cooling water tank 17, a heating rod 9 is installed inside the water bath heating barrel 1, and a vent hole 8 is arranged on one side of the heating rod 9 and, the air pressure is convenient to balance, saturated saline water is contained in the water bath heating barrel 1, one end of the air delivery pipe 10 is positioned above the cooling water tank 17 and positioned in the crystallization tank 20, the diversion pipe 19 is communicated and connected with the inner part of the crystallization tank 20, the air exhaust direction of the diversion pipe 19 is vertical and downward, the dispersed exhaust is convenient, when the benzoic acid purification crystallization is carried out, the benzoic acid can be added into the sublimation tank 2 through the feeding funnel 7, the heating rod 9 is used for heating the saturated saline water in the water bath heating barrel 1 to generate the temperature higher than 100 ℃, the benzoic acid is heated through heat conduction and sublimated into gas, the benzoic acid enters the crystallization tank 20 through the air delivery pipe 10, the cooling water tank 17 in the crystallization tank 20 is filled with cold water, the benzoic acid gas is cooled to be condensed into crystals on the top surface of the cooling water tank 17 again, the purification crystallization can be finished, the benzoic acid is sublimated, impurity remains in sublimation jar 2 to separation impurity has avoided traditional heating device easy high temperature to cause benzoic acid to decompose or impurity together sublimed problem, and it is extravagant to reduce benzoic acid, has improved separation purification efficiency simultaneously.
In one embodiment, an air cylinder 13 is fixedly installed on one side of the crystallization box 20, a piston rod of the air cylinder 13 penetrates through one side surface of the crystallization box 20 and extends into the crystallization box 20, the air cylinder 13 is in interference sliding connection with the side wall of the crystallization box 20, a connecting rod 15 is fixedly installed at the other end of the piston rod of the air cylinder 13, a scraper 16 is fixedly connected at one end of the connecting rod 15 in an inclined manner, the length of the scraper 16 is equal to the width of the inside of the crystallization box 20, the other end of the scraper 16 is in sliding abutment with a cooling water tank 17, a closed door 21 is installed on the other side surface of the crystallization box 20, the air cylinder 13 drives the scraper 16 to move towards the direction of the closed door 21 during condensation crystallization, the scraper 16 scrapes clean benzoic acid on the top surface of the cooling water tank 17, and when the crystal of the benzoic acid reaches a certain amount, the closed door 21 is opened to collect the benzoic acid, is convenient for heat conduction, thereby being convenient for recrystallization and improving the crystallization efficiency.
In one embodiment, the heating water tank 5 is installed on one side of the water bath heating barrel 1, the water outlet end of the heating water tank 5 is communicated with the water inlet end of the delivery pump 4 through the hot water replenishing pipe 3, the water outlet end of the delivery pump 4 is communicated with the water bath heating barrel 1 through the hot water replenishing pipe 3, the heating water tank 5 replenishes hot water for the water bath heating barrel 1, the phenomenon that the temperature is reduced too fast due to the fact that cold water is directly replenished is avoided, and meanwhile, the inconvenience in keeping the liquid level inside the water bath heating barrel 1 is facilitated.
In an embodiment, 2 top surfaces through connection of sublimation jar have clear water to supply tub 6, and 2 bottom surfaces through connection of sublimation jar have blow off pipe 11 to blow off pipe 11 runs through water bath heating bucket 1 and extends to the 1 outside of water bath heating bucket, when wasing, can fill into clear water to clear water supply pipe 6, and the clear water washes sublimation jar 2, and discharges from blow off pipe 11, and 2 wasing of sublimation jar of being convenient for.
In an embodiment, the upper surface of the other side of the cooling water tank 17 is connected with a water outlet pipe 14 in a penetrating manner, the surface of the water outlet pipe 14 is provided with a switch valve 12, the switch valve 12 is an electromagnetic valve, the switch valve 12 is started at regular time, and cold water in the cooling water tank 17 is replaced, which is a common water circulation structure and will not be described in detail herein.
In one embodiment, the surfaces of the clear water replenishing pipe 6 and the sewage draining pipe 11 are respectively provided with an electromagnetic valve, the clear water replenishing pipe 6 is communicated with a clear water source, and the electromagnetic valves are closed when the benzoic acid is purified and crystallized, so that the benzoic acid gas is prevented from leaking.
The working principle is as follows:
when purifying and crystallizing the benzoic acid, the benzoic acid can be added into the sublimation tank 2 through the feeding funnel 7, the heating rod 9 heats saturated brine inside the water bath heating barrel 1 to generate a temperature higher than 100 ℃, the benzoic acid is heated through heat conduction and sublimated into gas, the gas enters the crystallization tank 20 through the gas pipe 10, cold water is introduced into the cooling water tank 17 in the crystallization tank 20, the benzoic acid gas is cooled to be condensed into crystals on the top surface of the cooling water tank 17 again, the purification and crystallization can be completed, the benzoic acid is sublimated by the water bath heating barrel 1, the temperature of workers is convenient to control, impurities are remained in the sublimation tank 2 while the benzoic acid is sublimated, so that the impurities are separated, the problem that the benzoic acid is decomposed or the impurities are sublimated together due to overhigh temperature of a traditional heating device is avoided, the benzoic acid waste is reduced, the separation and purification efficiency is improved, meanwhile, when condensation and crystallization are carried out, cylinder 13 drives the direction removal of scraper 16 to airtight door 21, and scraper 16 strikes off the clean benzoic acid of coolant tank 17 top surface, and when the crystalline solid of benzoic acid reached a certain amount, open airtight door 21 and can collect the benzoic acid crystal, thereby it is more convenient to make benzoic acid collect, and simultaneously, also can expose coolant tank 17 top surface again when scraper 16 strikes off the crystal of coolant tank 17 top surface, the heat-conduction of being convenient for, thereby be convenient for secondary crystallization, improve crystallization efficiency.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a benzoic acid purification crystallization device, a serial communication port, including water bath heating bucket (1) and crystallization box (20), water bath heating bucket (1) internally mounted has sublimation jar (2), and sublimation jar (2) top surface through connection has charging hopper (7), and sublimation jar (2) top surface passes through gas-supply pipe (10) and crystallization box (20) through connection, and crystallization box (20) inside is provided with cooling water tank (17), and cooling water tank (17) one side below surface through connection has cold water supply pipe (18), water bath heating bucket (1) internally mounted has heating rod (9), and heating rod (9) one side is located water bath heating bucket (1) top surface and has seted up bleeder vent (8), and water bath heating bucket (1) inside has held the saturated salt solution gas-supply pipe, water bath (10) one end is located cooling water tank (17) top and is located crystallization box (20) inside through connection has shunt tubes (19), and the exhaust direction of the shunt pipe (19) is vertical downwards.
2. The benzoic acid purifying and crystallizing device according to claim 1, wherein a cylinder (13) is fixedly installed on one side of the crystallizing box (20), a piston rod of the cylinder (13) penetrates through one side surface of the crystallizing box (20) and extends into the crystallizing box (20), a connecting rod (15) is fixedly installed on the other end of the piston rod of the cylinder (13), one end of the connecting rod (15) is obliquely and fixedly connected with a scraper (16), the other end of the scraper (16) is in sliding butt joint with a cooling water tank (17), and a sealing door (21) is installed on the other side surface of the crystallizing box (20).
3. The benzoic acid purifying and crystallizing device according to claim 1, wherein a heating water tank (5) is installed on one side of the water bath heating barrel (1), the water outlet end of the heating water tank (5) is communicated with the water inlet end of the delivery pump (4) through a hot water replenishing pipe (3), and the water outlet end of the delivery pump (4) is communicated with the water bath heating barrel (1) through the hot water replenishing pipe (3).
4. The benzoic acid purifying and crystallizing device according to claim 1, wherein a clear water replenishing pipe (6) is connected to the top surface of the sublimation tank (2) in a penetrating manner, a drain pipe (11) is connected to the bottom surface of the sublimation tank (2) in a penetrating manner, and the drain pipe (11) penetrates through the water bath heating barrel (1) and extends to the outer side of the water bath heating barrel (1).
5. The benzoic acid purifying and crystallizing device according to claim 1, wherein a water outlet pipe (14) is connected to the upper surface of the other side of the cooling water tank (17) in a penetrating manner, and a switch valve (12) is installed on the surface of the water outlet pipe (14).
6. The benzoic acid purifying and crystallizing device according to claim 4, wherein the surfaces of the clear water replenishing pipe (6) and the sewage draining pipe (11) are respectively provided with an electromagnetic valve, and the clear water replenishing pipe (6) is communicated with a clear water source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022152287.3U CN213313434U (en) | 2020-09-27 | 2020-09-27 | Benzoic acid purification crystallization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022152287.3U CN213313434U (en) | 2020-09-27 | 2020-09-27 | Benzoic acid purification crystallization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213313434U true CN213313434U (en) | 2021-06-01 |
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ID=76067635
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022152287.3U Expired - Fee Related CN213313434U (en) | 2020-09-27 | 2020-09-27 | Benzoic acid purification crystallization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213313434U (en) |
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2020
- 2020-09-27 CN CN202022152287.3U patent/CN213313434U/en not_active Expired - Fee Related
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Granted publication date: 20210601 |