CN114917863A - Dopamine-coated nano calcium hydroxide and preparation method thereof - Google Patents
Dopamine-coated nano calcium hydroxide and preparation method thereof Download PDFInfo
- Publication number
- CN114917863A CN114917863A CN202210459964.7A CN202210459964A CN114917863A CN 114917863 A CN114917863 A CN 114917863A CN 202210459964 A CN202210459964 A CN 202210459964A CN 114917863 A CN114917863 A CN 114917863A
- Authority
- CN
- China
- Prior art keywords
- calcium hydroxide
- dopamine
- nano calcium
- coated nano
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 69
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 66
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims abstract description 66
- 229960003638 dopamine Drugs 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 10
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 9
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 22
- 239000001569 carbon dioxide Substances 0.000 description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000002715 modification method Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007709 nanocrystallization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to dopamine-coated nano calcium hydroxide and a preparation method thereof. The method is very simple and time-saving, and the synthesis process is carried out at normal temperature and normal pressure. More importantly, the specific surface area of the prepared dopamine-coated nano calcium hydroxide reaches 77-81g/m 2 Is more than 1.4 times of the highest specific surface area of the calcium hydroxide reported at present. The material has good production prospect, and can be popularized and applied to CO 2 And (4) capturing.
Description
Technical Field
The invention belongs to the technical field of carbon dioxide capture materials, and relates to dopamine-coated nano calcium hydroxide and a preparation method thereof.
Background
Carbon dioxide (CO) released by human activities 2 ) Is one of the main causes of the greenhouse effect. CO 2 2 Capturing and storing is a means for solving the greenhouse effect. In a plurality of CO 2 Calcium hydroxide has received increasing attention and research as a low cost material in trapping materials(RSC Adv.,2016,6,36031)。CO 2 The adsorption amount is evaluated for CO 2 Important parameter of Capacity, and specific surface area of calcium hydroxide to CO 2 The amount of adsorption plays a key role.
The specific surface area of the current commercial calcium hydroxide is 22g/m 2 To CO 2 The adsorption amount of (A) is very low, and the application requirements are difficult to meet. In order to improve the specific surface area, scientists adopt different methods to carry out nanocrystallization, namely preparing the nano calcium hydroxide. The calcium hydroxide particles with the particle size of 50-250nm are successfully prepared by an alcohol solution method, R.Camerini and the like, and the specific surface area of the calcium hydroxide particles can reach 38g/m at most 2 (J.colloid Interface Sci.2019,547, 370-381); the Shoya et al adopts a high-temperature surfactant modification method to prepare calcium hydroxide particles with the particle size of 100nm and uniform size, and the specific surface area of the calcium hydroxide particles is increased to 48g/m 2 (Shoya, the preparation of nano calcium hydroxide powder for stone cultural relics and the application thereof in the Yunguang Grottoes. Shuoshi paper 2012, Harbin industry university). The nanometer calcium hydroxide is prepared by surfactant modification method, and the specific surface area is further increased to 55g/m 2 (non-metallic minerals 2010,33, 5-12). However, from the application point of view, the specific surface area of calcium hydroxide still needs to be increased.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides dopamine-coated nano calcium hydroxide and a preparation method thereof.
Technical scheme
A dopamine-coated nano calcium hydroxide is characterized by comprising the components of a nano calcium hydroxide aqueous solution with the concentration of 10-20mg/ml and 1-3g of dopamine hydrochloride; dopamine is released in an aqueous solution by hydrochloric acid dopamine and is adsorbed on the surface of calcium hydroxide particles to obtain dopamine-coated nano calcium hydroxide; the specific surface area of the dopamine-coated nano calcium hydroxide reaches 77-81g/m 2 。
A preparation method of the dopamine-coated nano calcium hydroxide is characterized by comprising the following steps: preparing the nano calcium hydroxide into an aqueous solution with the concentration of 10-20mg/ml at normal temperature and normal pressure, then adding 1-3g of dopamine hydrochloride into the aqueous solution, and stirring for 1-5 h. Finally, washing and drying for 6-12h at 80-105 ℃ to obtain the dopamine-coated nano calcium hydroxide powder.
The preparation of the nano calcium hydroxide comprises the following steps: firstly, adding dimethylformamide into a calcium chloride solution, and stirring to obtain a calcium chloride mixed solution; then pouring the calcium chloride mixed solution into a sodium hydroxide solution to synthesize the nano calcium hydroxide, washing the synthesized nano calcium hydroxide by using saturated lime water, and finally drying to obtain the nano calcium hydroxide powder.
Advantageous effects
The invention provides dopamine-coated nano calcium hydroxide and a preparation method thereof. The method is very simple and time-saving, and the synthesis process is carried out at normal temperature and normal pressure. More importantly, the specific surface area of the prepared dopamine-coated nano calcium hydroxide reaches 77-81g/m 2 Is more than 1.4 times of the highest specific surface area of the calcium hydroxide reported at present. The material has good production prospect, and can be popularized and applied to CO 2 And (4) capturing.
Compared with the prior art, the preparation method of the dopamine-coated nano calcium hydroxide provided by the invention is simple and convenient, saves time, and the whole process is carried out at normal temperature and normal pressure. The dopamine hydrochloride is ingeniously utilized in the synthesis process to release dopamine in an alkaline solution and adsorb on the surfaces of the nano calcium hydroxide particles to obtain the dopamine-coated nano calcium hydroxide. More importantly, the specific surface area of the synthesized dopamine-coated nano calcium hydroxide reaches 77-81g/m 2 Is more than 1.4 times of the highest specific surface area of the calcium hydroxide reported at present. The material has good CO under the condition that the greenhouse effect is more and more concerned nowadays 2 Capturing the application prospect.
Detailed Description
The invention will now be further described with reference to the examples:
the preparation of said nano calcium hydroxide is referred to previously granted patent (ZL 201711361358.7); firstly, adding dimethylformamide into a calcium chloride solution, and stirring to obtain a calcium chloride mixed solution; then pouring the calcium chloride mixed solution into a sodium hydroxide solution to synthesize the nano calcium hydroxide, washing the synthesized nano calcium hydroxide by using saturated lime water, and finally drying to obtain the nano calcium hydroxide powder.
The first embodiment is as follows:
preparing the nano calcium hydroxide into an aqueous solution with the concentration of 10mg/ml, adding 1g of dopamine hydrochloride into the aqueous solution, stirring for 1h, washing, and drying at 80 ℃ for 6h to obtain the dopamine-coated nano calcium hydroxide powder. The result of a specific surface area tester shows that the specific surface area of the dopamine-coated nano calcium hydroxide prepared under the condition is 77g/m 2 。
Example two:
preparing the nano calcium hydroxide into an aqueous solution with the concentration of 12mg/ml, adding 1.5g of dopamine hydrochloride into the aqueous solution, stirring for 2 hours, washing, and drying for 8 hours at 90 ℃ to obtain the dopamine-coated nano calcium hydroxide powder. The result of a specific surface area tester shows that the specific surface area of the dopamine-coated nano calcium hydroxide prepared under the condition is 80g/m 2 。
Example three:
preparing the nano calcium hydroxide into an aqueous solution with the concentration of 18mg/ml, adding 2g of dopamine hydrochloride into the aqueous solution, stirring for 3 hours, washing, and drying at 100 ℃ for 10 hours to obtain the dopamine-coated nano calcium hydroxide powder. The results of the specific surface area tester show that the specific surface area of the dopamine-coated nano calcium hydroxide prepared under the condition is 78g/m 2 。
Example four:
preparing the nano calcium hydroxide into an aqueous solution with the concentration of 20mg/ml, adding 3g of dopamine hydrochloride into the aqueous solution, stirring for 5 hours, washing, and drying at 105 ℃ for 12 hours to obtain the dopamine-coated nano calcium hydroxide powder. The result of the specific surface area tester shows thatThe specific surface area of the dopamine-coated nano calcium hydroxide prepared under the condition is 81g/m 2 。
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (3)
1. A dopamine-coated nano calcium hydroxide is characterized by comprising the components of a nano calcium hydroxide aqueous solution with the concentration of 10-20mg/ml and 1-3g of dopamine hydrochloride; dopamine is released in an aqueous solution by hydrochloric acid dopamine and is adsorbed on the surface of calcium hydroxide particles to obtain dopamine-coated nano calcium hydroxide; the specific surface area of the dopamine-coated nano calcium hydroxide reaches 77-81g/m 2 。
2. The preparation method of the dopamine-coated nano calcium hydroxide according to claim 1, characterized by comprising the following steps: preparing the nano calcium hydroxide into an aqueous solution with the concentration of 10-20mg/ml at normal temperature and normal pressure, then adding 1-3g of dopamine hydrochloride into the solution, and stirring for 1-5 h. Finally, washing and drying for 6-12h at the temperature of 80-105 ℃ to obtain the dopamine-coated nano calcium hydroxide powder.
3. The method of claim 2, wherein: the preparation of the nano calcium hydroxide comprises the following steps: firstly, adding dimethylformamide into a calcium chloride solution, and stirring to obtain a calcium chloride mixed solution; then pouring the calcium chloride mixed solution into a sodium hydroxide solution to synthesize the nano calcium hydroxide, washing the synthesized nano calcium hydroxide by using saturated lime water, and finally drying to obtain the nano calcium hydroxide powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210459964.7A CN114917863A (en) | 2022-04-24 | 2022-04-24 | Dopamine-coated nano calcium hydroxide and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210459964.7A CN114917863A (en) | 2022-04-24 | 2022-04-24 | Dopamine-coated nano calcium hydroxide and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114917863A true CN114917863A (en) | 2022-08-19 |
Family
ID=82806754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210459964.7A Pending CN114917863A (en) | 2022-04-24 | 2022-04-24 | Dopamine-coated nano calcium hydroxide and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114917863A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150337136A1 (en) * | 2012-11-15 | 2015-11-26 | Kalkfabrik Netstal Ag | Surface-modified calcium oxide |
| CN105502459A (en) * | 2015-12-28 | 2016-04-20 | 常熟市宏宇钙化物有限公司 | Preparing method of nanometer calcium hydroxide for antacid |
| CN105680021A (en) * | 2016-03-26 | 2016-06-15 | 上海大学 | Poly-dopamine coated nano-micro powder and preparation method thereof |
| CN108083311A (en) * | 2018-03-16 | 2018-05-29 | 西北工业大学 | A kind of preparation method for the nano calcium hydroxide powder body material reinforced for ancient wall |
| CN108484907A (en) * | 2018-03-06 | 2018-09-04 | 华中科技大学 | A kind of transition metal amine complex functional poly dopamine and preparation method and application |
| WO2021042212A1 (en) * | 2019-09-06 | 2021-03-11 | Uti Limited Partnership | Zirconia-stabilized calcium oxide nanoparticles for co2 capture at high temperatures |
| CN114250220A (en) * | 2021-12-24 | 2022-03-29 | 中国科学院兰州化学物理研究所 | Preparation and application of dopamine-coated sea urchin-shaped manganese dioxide hollow microspheres |
-
2022
- 2022-04-24 CN CN202210459964.7A patent/CN114917863A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150337136A1 (en) * | 2012-11-15 | 2015-11-26 | Kalkfabrik Netstal Ag | Surface-modified calcium oxide |
| CN105502459A (en) * | 2015-12-28 | 2016-04-20 | 常熟市宏宇钙化物有限公司 | Preparing method of nanometer calcium hydroxide for antacid |
| CN105680021A (en) * | 2016-03-26 | 2016-06-15 | 上海大学 | Poly-dopamine coated nano-micro powder and preparation method thereof |
| CN108484907A (en) * | 2018-03-06 | 2018-09-04 | 华中科技大学 | A kind of transition metal amine complex functional poly dopamine and preparation method and application |
| CN108083311A (en) * | 2018-03-16 | 2018-05-29 | 西北工业大学 | A kind of preparation method for the nano calcium hydroxide powder body material reinforced for ancient wall |
| WO2021042212A1 (en) * | 2019-09-06 | 2021-03-11 | Uti Limited Partnership | Zirconia-stabilized calcium oxide nanoparticles for co2 capture at high temperatures |
| CN114250220A (en) * | 2021-12-24 | 2022-03-29 | 中国科学院兰州化学物理研究所 | Preparation and application of dopamine-coated sea urchin-shaped manganese dioxide hollow microspheres |
Non-Patent Citations (1)
| Title |
|---|
| 郝志飞;张印民;张永锋;孙俊民;戚海平;: "湿法改性制备高比表面积氢氧化钙及表征", 无机盐工业, no. 12, pages 19 - 21 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102259907B (en) | Porous zinc oxide nano material and preparation method thereof | |
| CN109261141B (en) | ZIF-8 nanocrystal and preparation method and application thereof | |
| CN109019656B (en) | Method for producing nano rare earth oxide powder | |
| CN105923623A (en) | Preparation method of graphene powder with three-dimensional hierarchical porous structure | |
| US10675606B2 (en) | Mid-temperature range dry regenerable solid carbon dioxide sorbent, slurry composition and method for manufacturing the same | |
| CN101550344B (en) | Method for preparing magnesium hydroxide/silicon dioxide composite inorganic flame retardant | |
| CN101940910A (en) | Magnetic separation type composite adsorbing material and preparation method thereof | |
| JP7477614B2 (en) | Method for preparing 2-4 μm battery grade cobalt tetroxide | |
| CN110534732A (en) | A kind of preparation method of nickel-cobalt-manganese ternary persursor material | |
| CN112457676B (en) | Preparation method of metal organic framework/precious metal simple substance nanocomposite | |
| CN107042087A (en) | A kind of method that Situ Hydrothermal prepares magnetic metal organic framework core-shell material | |
| CN108002418A (en) | The preparation method of cube nano-calcium carbonate | |
| CN110064372A (en) | A kind of metal organic framework magnetic composite and its preparation method and application | |
| CN108163879A (en) | A kind of preparation method of the calcium carbonate of different-shape and phase structure | |
| CN108328593B (en) | Cotton ball-shaped cobalt phosphate ball and preparation method thereof | |
| CN105858706A (en) | Method for preparing yttrium oxide powder | |
| US20230339773A1 (en) | Alpha-phase nickel hydroxide and preparation method and use thereof | |
| CN116726870A (en) | Method for synthesizing layered aluminum salt with high lithium extraction amount by green chemical method | |
| CN114917863A (en) | Dopamine-coated nano calcium hydroxide and preparation method thereof | |
| CN105271364A (en) | Method for preparing porous zinc oxide microspheres with metal organic skeleton MOF-5 materials being precursors | |
| CN111690148B (en) | Green preparation method of two-dimensional metal-organic framework material | |
| JPS62202817A (en) | Production of fine particle of calcium carbonate | |
| CN112850764A (en) | Method for preparing shape-controllable aluminum oxide hollow microspheres without template agent | |
| CN109575305B (en) | Preparation method of Co-MOF gas-sensitive nano material, product and application thereof | |
| CN111298790B (en) | Pt atom cluster load WO 3 Nanosheet hydrogen evolution reaction catalyst and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220819 |