CN211226350U - Industrial equipment for preparing graphene oxide by one-step method under low-temperature condition - Google Patents
Industrial equipment for preparing graphene oxide by one-step method under low-temperature condition Download PDFInfo
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- CN211226350U CN211226350U CN201921920305.9U CN201921920305U CN211226350U CN 211226350 U CN211226350 U CN 211226350U CN 201921920305 U CN201921920305 U CN 201921920305U CN 211226350 U CN211226350 U CN 211226350U
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- sulfuric acid
- recovery tower
- oxidation reaction
- reaction kettle
- settling tank
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 109
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 49
- 238000011084 recovery Methods 0.000 claims abstract description 45
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000009835 boiling Methods 0.000 claims abstract description 33
- 238000005406 washing Methods 0.000 claims abstract description 19
- 238000005554 pickling Methods 0.000 claims abstract description 13
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011572 manganese Substances 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 238000004108 freeze drying Methods 0.000 claims abstract description 11
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 11
- 239000010439 graphite Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000012286 potassium permanganate Substances 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 21
- 230000003647 oxidation Effects 0.000 claims description 14
- 230000002572 peristaltic effect Effects 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 7
- 238000005374 membrane filtration Methods 0.000 abstract description 5
- 239000001117 sulphuric acid Substances 0.000 abstract description 4
- 235000011149 sulphuric acid Nutrition 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000007935 neutral effect Effects 0.000 abstract description 2
- 239000006227 byproduct Substances 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 7
- 239000012295 chemical reaction liquid Substances 0.000 description 5
- 238000005192 partition Methods 0.000 description 5
- -1 graphite alkene Chemical class 0.000 description 4
- 239000000376 reactant Substances 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 230000000739 chaotic effect Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012377 drug delivery Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
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Abstract
The utility model discloses an industrial equipment of graphite oxide is prepared to next legal system of low temperature condition, including oxidation reaction kettle, the subsider, the pickling subsider, washing membrane filtration system, freeze drying cabinet, hydrochloric acid boiling recovery tower, manganese recovery system, sulphuric acid boiling recovery tower and temperature control system, oxidation reaction accomplishes the back and handles the material through subsider and pickling subsider, retrieves sulphuric acid and hydrochloric acid through sulphuric acid boiling recovery tower and hydrochloric acid boiling recovery tower simultaneously, washes to neutral through washing membrane filtration system at last, rethread freeze drying cabinet is dry and is obtained high-quality spongy graphite oxide. The utility model realizes the large-scale low-temperature one-step preparation of high-quality graphene oxide; in addition, concentrated sulfuric acid, hydrochloric acid and manganese are respectively recovered through a sulfuric acid boiling recovery tower, a hydrochloric acid boiling recovery tower and a manganese recovery system, so that the recovery and reutilization of reaction byproducts are realized, and the environmental pollution is avoided.
Description
Technical Field
The utility model relates to a preparation technical field of oxidation graphite alkene, concretely relates to industrial equipment of one step of legal system preparation oxidation graphite alkene on low temperature condition.
Background
Graphene is a two-dimensional carbon nanomaterial consisting of carbon atoms in sp2 hybridized orbitals to form a hexagonal honeycomb lattice. The material has many novel physical properties, is the best material known at present for conducting electricity at normal temperature, has the speed of movement of electrons in the material reaching 1/300 of the speed of light far exceeding that of a common conductor, and has excellent heat conduction and mechanical properties. Has important application prospect in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like, and is considered as a revolutionary material in the future.
Graphene oxide is a precursor for preparing graphene by a chemical reduction method, is a product of chemically oxidizing and stripping graphite powder, is also called functionalized graphene, is an oxide of graphene, and is a precursor for preparing graphene at low cost on a large scale. Compared with other methods, the graphene oxide is low in price and simple in preparation process. The traditional Hummers method for preparing graphene oxide comprises three steps of low-temperature edge oxidation, medium-temperature deep oxidation and high-temperature hydrolysis. However, due to the fact that the temperature is too high in the oxidation process, carbon atoms are easy to lose, the performance and the application of the oxidized graphene are affected, particularly the quality of a reduced graphene product obtained by reducing the oxidized graphene is obviously affected, and the application of the oxidized graphene and the reduced oxidized graphene is greatly limited. Therefore, graphene oxide can be prepared through low-temperature one-step oxidation, but the current oxidation reaction kettle equipment cannot meet the condition of low-temperature oxidation, the temperature is not easy to control in the feeding process, the material stirring is not uniform, the potassium permanganate utilization rate is not high, the quality of the graphene oxide is seriously influenced, and the quality of the graphene is further influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an industrial equipment of one-step method preparation oxidation graphite alkene under the low temperature condition can realize the scale preparation of high quality oxidation graphite alkene.
In order to achieve the above object, the utility model adopts the following technical scheme: an industrial device for preparing graphene oxide by one-step method under low temperature condition comprises an oxidation reaction kettle, a settling tank, an acid washing settling tank, a water washing membrane filtration system, a freeze drying box, a hydrochloric acid boiling recovery tower, a manganese recovery system, a sulfuric acid boiling recovery tower and a temperature control system; the oxidation reaction kettle is connected with the settling tank through a peristaltic pump I, the settling tank is connected with the pickling settling tank through a peristaltic pump II, the pickling settling tank is connected with the washing membrane filtering system through a peristaltic pump III, and the washing membrane filtering system is connected with the freeze drying box;
the top of the oxidation reaction kettle is respectively provided with a potassium permanganate feeding port, a concentrated sulfuric acid feeding port, a dilute sulfuric acid feeding port and a graphite feeding port, the potassium permanganate feeding port and the dilute sulfuric acid feeding port are respectively provided with an upper layer and a lower layer which are separated by a partition plate, the bottom of the lower potassium permanganate feeding port is provided with a plurality of potassium permanganate nozzles, the bottom of the lower dilute sulfuric acid feeding port is provided with a plurality of dilute sulfuric acid nozzles, the interior of the oxidation reaction kettle is connected with an elastic stirrer with rigidity, the inner side wall of the oxidation reaction kettle is provided with a temperature detector, the outer side wall of the oxidation reaction kettle is connected with a water cooling sleeve, the bottom of the oxidation reaction kettle is connected with an ultrasonic oscillator, the potassium permanganate feeding port, the dilute sulfuric acid feeding port and the temperature detector are respectively connected with a temperature control system, and the;
the lower gas phase inlet of the sulfuric acid boiling recovery tower is connected with the settling tank, the upper gas phase outlet of the sulfuric acid boiling recovery tower is connected with the concentrated sulfuric acid feed inlet, the gas phase inlet and the outlet of the hydrochloric acid boiling recovery tower are respectively connected with the acid washing settling tank, and the sulfuric acid boiling recovery tower and the hydrochloric acid boiling recovery tower are also respectively connected with the manganese recovery system.
Further, elasticity has agitator of rigidity concurrently includes (mixing) shaft, puddler and stirring rope, the vertical setting of (mixing) shaft and the upper end stretch out the output shaft transmission of oxidation reaction cauldron and motor and be connected, the puddler with the perpendicular fixed connection of (mixing) shaft just is equipped with about two sets ofly, stirring rope fixed connection is upper and lower two sets of between the puddler.
Preferably, the oxidation reaction kettle and the elastic stirrer are both made of oxidation-resistant and corrosion-resistant materials.
More preferably, the stirring rope is made of an elastic steel wire.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) according to the device, the feeding port is connected with the temperature control system, and a special feeding mode is adopted, so that the problem that high temperature is locally generated in a reaction liquid due to feeding in an oxidation process is solved, and the preparation of high-quality graphene is realized;
(2) the device rotates through the elastic and rigid stirrer, so that the fluid is in a chaotic mixing state, and uniform mass and heat transfer among reactants is realized;
(3) the equipment can realize the recycling of the waste products, namely strong acid and manganese, generated in the reaction link, and avoid the discharge of pollutants.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the structure of the potassium permanganate feed inlet of the present invention;
FIG. 3 is a schematic view of the structure of the dilute sulfuric acid feed port of the present invention;
FIG. 4 is a schematic view of a flexible and rigid agitator.
In the figure, 1 oxidation reaction kettle, 2 elastic stirrer with rigidity, 201 stirring shaft, 202 stirring rod, 203 stirring rope, 3 thermometers, 4 water cooling jacket, 5 water cooling circulation cabinet, 6 temperature control system, 7 dilute sulfuric acid feed inlet, 8 concentrated sulfuric acid feed inlet, 9 potassium permanganate feed inlet, 10 graphite feed inlet, 11 ultrasonic oscillator, 12 ultrasonic probe, 13 peristaltic pump I, 14 settling tank, 15 peristaltic pump II, 16 peristaltic pump III, 17 pickling settling tank, 18 water washing membrane filtration system, 19 freeze drying box, 20 hydrochloric acid boiling recovery tower, 21 manganese recovery system, 22 sulfuric acid boiling recovery tower, 23 potassium permanganate spout, 24 dilute sulfuric acid nozzle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in FIG. 1, the utility model discloses an industrial equipment of graphite oxide is prepared to next step method under low temperature condition, including oxidation reaction kettle 1, subsider 14, pickling subsider 17, washing membrane filtration system 18, freeze-drying oven 19, hydrochloric acid boiling recovery tower 20, manganese recovery system 21, sulphuric acid boiling recovery tower 22 and temperature control system 6.
Oxidation reaction kettle 1's top is equipped with potassium permanganate charge door 9, concentrated sulfuric acid feed inlet 8, dilute sulfuric acid charge door 7 and graphite feed inlet 10 respectively, and oxidation reaction kettle 1's internal connection has an elasticity to have rigid agitator 2 concurrently, as shown in fig. 4, elasticity has rigid agitator 2 concurrently and includes (mixing) shaft 201, puddler 202 and stirring rope 203, the output shaft transmission that oxidation reaction kettle 1 and motor are stretched out to the vertical setting of (mixing) shaft 201 and upper end is connected, puddler 202 with the perpendicular fixed connection of (mixing) shaft 201 just is equipped with about two sets ofly, stirring rope 203 fixed connection is two sets of from top to bottom between the puddler 202. The inside wall of the oxidation reaction kettle 1 is provided with a temperature detector 3, the outside wall of the oxidation reaction kettle 1 is connected with a water cooling jacket 4, and the bottom of the oxidation reaction kettle 1 is connected with an ultrasonic oscillator 11. The potassium permanganate feed opening 9, the dilute sulfuric acid feed opening 7 and the temperature detector 3 are respectively connected with the temperature control system 6, and the dilute sulfuric acid feed opening 7 is also connected with the water-cooling circulation cabinet 5. Because the reactants of concentrated sulfuric acid and potassium permanganate have strong corrosivity and strong oxidizing property, the oxidation reaction kettle 1 and the stirrer 2 with elasticity and rigidity are both made of oxidation-resistant and corrosion-resistant materials.
As shown in fig. 2, the potassium permanganate feed opening 9 is provided with an upper layer and a lower layer which are separated by a partition board, and the bottom of the lower potassium permanganate feed opening 9 is provided with a plurality of potassium permanganate nozzles 23. The potassium permanganate feed opening 9 is electrically connected with the temperature control system 6, and according to the temperature change of the reaction liquid, the temperature control system 6 controls the opening and closing of the partition board in the potassium permanganate feed opening 9, so that the proper addition of potassium permanganate is realized.
As shown in fig. 3, the dilute sulfuric acid feed port 7 is provided with an upper layer and a lower layer which are separated by a partition, and the bottom of the lower dilute sulfuric acid feed port 7 is provided with a plurality of dilute sulfuric acid nozzles 24. The dilute sulfuric acid feed port 7 is electrically connected with the temperature control system 6, and the temperature control system 6 controls the opening and closing of the partition plate in the high dilute sulfuric acid feed port 7 according to the temperature change of the reaction liquid, so that the proper addition of the dilute sulfuric acid is realized.
When the temperature of the reaction liquid is lower than 15 ℃, the potassium permanganate on the upper layer slowly enters the lower layer, and the potassium permanganate is added into the oxidation reaction kettle 1 through the potassium permanganate nozzle 23. The dilute sulfuric acid enters a dilute sulfuric acid feed port 7 after being cooled, is atomized through a dilute sulfuric acid nozzle 24, and is sprayed into the oxidation reaction kettle 1. When the temperature of the reaction liquid measured by the temperature detector 3 is lower than 15 ℃, the potassium permanganate nozzle 23 or the dilute sulfuric acid nozzle 24 is opened, and conversely, when the temperature is higher than 15 ℃, the potassium permanganate feeding port 9 or the dilute sulfuric acid feeding port 7 is closed. In the oxidation stage, the ultrasonic oscillator 11 is turned on, and ultrasonic waves are emitted through the ultrasonic probe 12 to strengthen the reaction process. The stirring speed of the stirrer 2 in the oxidation reaction stage is 60-1000 rpm, and the reactants are in a chaotic state through elastic and rigid stirring, so that the temperature of the whole system can be uniform.
The oxidation reaction kettle 1 is connected with the settling tank 14 through a peristaltic pump I13, the settling tank 14 is connected with the pickling settling tank 17 through a peristaltic pump II 15, the pickling settling tank 17 is connected with the water washing membrane filtering system 18 through a peristaltic pump III 16, and the water washing membrane filtering system 18 is connected with the freeze drying box 19.
The lower gas phase inlet of the sulfuric acid boiling recovery tower 22 is connected with the settling tank 14, the upper gas phase outlet of the sulfuric acid boiling recovery tower 22 is connected with the concentrated sulfuric acid feed port 8, the gas phase inlet and the outlet of the hydrochloric acid boiling recovery tower 20 are respectively connected with the pickling settling tank 17, and the sulfuric acid boiling recovery tower 22 and the hydrochloric acid boiling recovery tower 20 are also respectively connected with the manganese recovery system 21.
After the oxidation reaction is finished, sulfuric acid and graphene oxide are separated through sedimentation, the sulfuric acid enters a sulfuric acid boiling recovery tower 22, the sulfuric acid flows into a concentrated sulfuric acid feed inlet 8 after being recovered, the cyclic utilization of the sulfuric acid is realized, the graphene oxide enters an acid washing settling tank 17 through a peristaltic pump II 15, after hydrochloric acid is washed for multiple times, waste hydrochloric acid enters a hydrochloric acid boiling recovery tower 20 and is recovered and recycled, meanwhile, the sulfuric acid boiling recovery tower 22 and the hydrochloric acid boiling recovery tower 20 are connected with a manganese recovery system 21, and residual liquid after evaporation enters the manganese recovery system 21.
The pickling settling tank 17 is connected with the washing membrane filtering system 18 through the peristaltic pump III 16, and the oxidized graphene after pickling is washed to neutral through a plurality of times of washing, sent into the freeze drying box 19, and is subjected to freeze drying at-25 to-200 ℃ to obtain a spongy oxidized graphene material.
Claims (4)
1. The industrial equipment for preparing the graphene oxide by the one-step method under the low-temperature condition is characterized by comprising an oxidation reaction kettle (1), a settling tank (14), an acid washing settling tank (17), a water washing membrane filtering system (18), a freeze drying box (19), a hydrochloric acid boiling recovery tower (20), a manganese recovery system (21), a sulfuric acid boiling recovery tower (22) and a temperature control system (6); wherein the content of the first and second substances,
the oxidation reaction kettle (1) is connected with the settling tank (14) through a peristaltic pump I (13), the settling tank (14) is connected with the pickling settling tank (17) through a peristaltic pump II (15), the pickling settling tank (17) is connected with the water washing membrane filtering system (18) through a peristaltic pump III (16), and the water washing membrane filtering system (18) is connected with the freeze drying box (19);
the top of oxidation reaction kettle (1) is equipped with potassium permanganate charge door (9), concentrated sulfuric acid feed inlet (8), dilute sulfuric acid charge door (7) and graphite feed inlet (10) respectively, potassium permanganate charge door (9) with dilute sulfuric acid charge door (7) all are provided with upper and lower two-layer through the baffle isolation, and the bottom of lower floor's potassium permanganate charge door (9) is equipped with a plurality of potassium permanganate spout (23), and the bottom of lower floor's dilute sulfuric acid charge door (7) is equipped with a plurality of dilute sulfuric acid nozzle (24), the internal connection of oxidation reaction kettle (1) has an elasticity agitator (2) that rigidity has concurrently, is equipped with thermodetector (3) on the inside wall of oxidation reaction kettle (1), and water cooling jacket (4) is connected to the lateral wall of oxidation reaction kettle (1), and the bottom of oxidation reaction kettle (1) is connected with ultrasonic oscillator (11), potassium permanganate charge door (9), The dilute sulfuric acid feeding port (7) and the temperature detector (3) are respectively connected with the temperature control system (6), and the dilute sulfuric acid feeding port (7) is connected with the water-cooling circulation cabinet (5);
the lower gas phase inlet of the sulfuric acid boiling recovery tower (22) is connected with the settling tank (14), the upper gas phase outlet of the sulfuric acid boiling recovery tower (22) is connected with the concentrated sulfuric acid feed port (8), the gas phase inlet and the outlet of the hydrochloric acid boiling recovery tower (20) are respectively connected with the acid washing settling tank (17), and the sulfuric acid boiling recovery tower (22) and the hydrochloric acid boiling recovery tower (20) are also respectively connected with the manganese recovery system (21).
2. The industrial equipment for preparing graphene oxide by the next step under the low temperature condition according to claim 1, wherein the elastic and rigid stirrer (2) comprises a stirring shaft (201), a stirring rod (202) and a stirring rope (203), the stirring shaft (201) is vertically arranged, the upper end of the stirring shaft extends out of the oxidation reaction kettle (1) and is in transmission connection with an output shaft of a motor, the stirring rod (202) is vertically and fixedly connected with the stirring shaft (201) and is provided with an upper group and a lower group, and the stirring rope (203) is fixedly connected between the upper group and the lower group of the stirring rod (202).
3. The industrial equipment for preparing graphene oxide by the one-step method under the low-temperature condition as claimed in claim 2, wherein the oxidation reaction kettle (1) and the elastic and rigid stirrer (2) are both made of oxidation-resistant and corrosion-resistant materials.
4. The industrial equipment for preparing graphene oxide by the one-step method under the low-temperature condition as claimed in claim 3, wherein the stirring rope (203) is made of an elastic steel wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921920305.9U CN211226350U (en) | 2019-11-08 | 2019-11-08 | Industrial equipment for preparing graphene oxide by one-step method under low-temperature condition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921920305.9U CN211226350U (en) | 2019-11-08 | 2019-11-08 | Industrial equipment for preparing graphene oxide by one-step method under low-temperature condition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112645317A (en) * | 2020-12-30 | 2021-04-13 | 南通第六元素材料科技有限公司 | Preparation method and equipment of graphene oxide or graphite oxide |
| CN112678812A (en) * | 2020-12-31 | 2021-04-20 | 南通第六元素材料科技有限公司 | Method and equipment for efficiently preparing graphene oxide or graphite oxide on large scale |
| CN114684816A (en) * | 2020-12-31 | 2022-07-01 | 南通第六元素材料科技有限公司 | Preparation method and production equipment of high-purity graphene oxide or graphite oxide |
-
2019
- 2019-11-08 CN CN201921920305.9U patent/CN211226350U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112645317A (en) * | 2020-12-30 | 2021-04-13 | 南通第六元素材料科技有限公司 | Preparation method and equipment of graphene oxide or graphite oxide |
| CN112678812A (en) * | 2020-12-31 | 2021-04-20 | 南通第六元素材料科技有限公司 | Method and equipment for efficiently preparing graphene oxide or graphite oxide on large scale |
| CN114684816A (en) * | 2020-12-31 | 2022-07-01 | 南通第六元素材料科技有限公司 | Preparation method and production equipment of high-purity graphene oxide or graphite oxide |
| CN114684816B (en) * | 2020-12-31 | 2023-11-21 | 南通第六元素材料科技有限公司 | Preparation method and production equipment of high-purity graphene oxide or graphite oxide |
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