CN114768865A - 一种用于环己酮肟制备6-氨基己腈的催化剂及其应用 - Google Patents
一种用于环己酮肟制备6-氨基己腈的催化剂及其应用 Download PDFInfo
- Publication number
- CN114768865A CN114768865A CN202210566637.1A CN202210566637A CN114768865A CN 114768865 A CN114768865 A CN 114768865A CN 202210566637 A CN202210566637 A CN 202210566637A CN 114768865 A CN114768865 A CN 114768865A
- Authority
- CN
- China
- Prior art keywords
- catalyst
- parts
- molecular sieve
- phosphate
- preparing
- 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
- VEZUQRBDRNJBJY-UHFFFAOYSA-N cyclohexanone oxime Chemical compound ON=C1CCCCC1 VEZUQRBDRNJBJY-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000003054 catalyst Substances 0.000 title claims abstract description 63
- KBMSFJFLSXLIDJ-UHFFFAOYSA-N 6-aminohexanenitrile Chemical compound NCCCCCC#N KBMSFJFLSXLIDJ-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000002808 molecular sieve Substances 0.000 claims abstract description 49
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 35
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 35
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 24
- 239000010452 phosphate Substances 0.000 claims abstract description 23
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 229910052710 silicon Inorganic materials 0.000 claims description 20
- 239000010703 silicon Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 229910001463 metal phosphate Inorganic materials 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 9
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 8
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- UGACIEPFGXRWCH-UHFFFAOYSA-N [Si].[Ti] Chemical compound [Si].[Ti] UGACIEPFGXRWCH-UHFFFAOYSA-N 0.000 claims description 4
- WAKZZMMCDILMEF-UHFFFAOYSA-H barium(2+);diphosphate Chemical compound [Ba+2].[Ba+2].[Ba+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O WAKZZMMCDILMEF-UHFFFAOYSA-H 0.000 claims description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 229920000136 polysorbate Polymers 0.000 claims description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 239000008235 industrial water Substances 0.000 claims description 3
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims description 3
- 239000004137 magnesium phosphate Substances 0.000 claims description 3
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims description 3
- 229960002261 magnesium phosphate Drugs 0.000 claims description 3
- 235000010994 magnesium phosphates Nutrition 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- BGQMOFGZRJUORO-UHFFFAOYSA-M tetrapropylammonium bromide Chemical compound [Br-].CCC[N+](CCC)(CCC)CCC BGQMOFGZRJUORO-UHFFFAOYSA-M 0.000 claims description 3
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 2
- 238000001354 calcination Methods 0.000 claims description 2
- 239000001506 calcium phosphate Substances 0.000 claims description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 2
- 235000011010 calcium phosphates Nutrition 0.000 claims description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 2
- 239000007792 gaseous phase Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 5
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007037 hydroformylation reaction Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- ISBHMJZRKAFTGE-UHFFFAOYSA-N pent-2-enenitrile Chemical compound CCC=CC#N ISBHMJZRKAFTGE-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007670 refining Methods 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/89—Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/03—Catalysts comprising molecular sieves not having base-exchange properties
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J29/405—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Catalysts (AREA)
Abstract
Description
催化剂 | 反应温度,℃ | 环己酮肟:氨比 | WHSV,h<sup>-1</sup> | 单程环己酮肟转化率 | 6-氨基己腈选择性 |
A | 340-380 | 1:3-1:6 | 1-5 | 65%-70% | 90%-95% |
B | 350-400 | 1:4-1:8 | 1-5 | 60%-65% | 85%-90% |
C | 350-420 | 1:4-1:8 | 1-5 | 65%-70% | 90%-95% |
D | 400-450 | 1:3-1:5 | 1-5 | 66%-70% | 96%-97% |
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210566637.1A CN114768865A (zh) | 2022-05-24 | 2022-05-24 | 一种用于环己酮肟制备6-氨基己腈的催化剂及其应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210566637.1A CN114768865A (zh) | 2022-05-24 | 2022-05-24 | 一种用于环己酮肟制备6-氨基己腈的催化剂及其应用 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114768865A true CN114768865A (zh) | 2022-07-22 |
Family
ID=82407797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210566637.1A Pending CN114768865A (zh) | 2022-05-24 | 2022-05-24 | 一种用于环己酮肟制备6-氨基己腈的催化剂及其应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114768865A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116393163A (zh) * | 2023-03-27 | 2023-07-07 | 湖北兴发化工集团股份有限公司 | 用于环己酮肟一步法合成6-氨基己腈的组合型催化剂及其制备方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030171633A1 (en) * | 2002-02-28 | 2003-09-11 | Teng Xu | Molecular sieve compositions, catalyst thereof, their making and use in conversion processes |
CN101602010A (zh) * | 2009-07-08 | 2009-12-16 | 中国科学院上海有机化学研究所 | 分子筛催化剂、制备方法及其在乳酸脱水制备丙烯酸中的应用 |
CN102515193A (zh) * | 2011-12-31 | 2012-06-27 | 中国天辰工程有限公司 | 一种含硅分子筛的合成方法 |
CN111672526A (zh) * | 2020-06-10 | 2020-09-18 | 江苏扬农化工集团有限公司 | 用于合成己二胺中间体6-氨基己腈的催化剂的制备方法及6-氨基己腈的合成方法 |
CN114192170A (zh) * | 2021-12-27 | 2022-03-18 | 于向真 | 一种从环己酮肟或己内酰胺合成6-氨基己腈的催化剂及其制备方法 |
CN114210361A (zh) * | 2021-12-27 | 2022-03-22 | 于向真 | 一种从环己酮肟或己内酰胺一步合成6-氨基己腈的催化剂及其制备方法 |
CN114349018A (zh) * | 2022-02-24 | 2022-04-15 | 江苏扬农化工集团有限公司 | Mfi分子筛及其制备方法和己内酰胺的制备方法 |
-
2022
- 2022-05-24 CN CN202210566637.1A patent/CN114768865A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030171633A1 (en) * | 2002-02-28 | 2003-09-11 | Teng Xu | Molecular sieve compositions, catalyst thereof, their making and use in conversion processes |
CN101602010A (zh) * | 2009-07-08 | 2009-12-16 | 中国科学院上海有机化学研究所 | 分子筛催化剂、制备方法及其在乳酸脱水制备丙烯酸中的应用 |
CN102515193A (zh) * | 2011-12-31 | 2012-06-27 | 中国天辰工程有限公司 | 一种含硅分子筛的合成方法 |
CN111672526A (zh) * | 2020-06-10 | 2020-09-18 | 江苏扬农化工集团有限公司 | 用于合成己二胺中间体6-氨基己腈的催化剂的制备方法及6-氨基己腈的合成方法 |
CN114192170A (zh) * | 2021-12-27 | 2022-03-18 | 于向真 | 一种从环己酮肟或己内酰胺合成6-氨基己腈的催化剂及其制备方法 |
CN114210361A (zh) * | 2021-12-27 | 2022-03-22 | 于向真 | 一种从环己酮肟或己内酰胺一步合成6-氨基己腈的催化剂及其制备方法 |
CN114349018A (zh) * | 2022-02-24 | 2022-04-15 | 江苏扬农化工集团有限公司 | Mfi分子筛及其制备方法和己内酰胺的制备方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116393163A (zh) * | 2023-03-27 | 2023-07-07 | 湖北兴发化工集团股份有限公司 | 用于环己酮肟一步法合成6-氨基己腈的组合型催化剂及其制备方法 |
CN116393163B (zh) * | 2023-03-27 | 2024-05-24 | 湖北兴发化工集团股份有限公司 | 用于环己酮肟一步法合成6-氨基己腈的组合型催化剂及其制备方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6475465B2 (en) | Titanium-silicalite molecular sieve and the method for its preparation | |
CN112774726B (zh) | 球形钛硅分子筛催化剂及其制备方法 | |
CN114768865A (zh) | 一种用于环己酮肟制备6-氨基己腈的催化剂及其应用 | |
US11420876B2 (en) | High-efficiency, fast and green method for preparing zeolite molecular sieve | |
CN114805119B (zh) | 一种己内酰胺液相氨化脱水制备6-氨基己腈的方法 | |
CN112778195B (zh) | 一种促进丙烯醛和氨气反应制备3-甲基吡啶的方法 | |
CN112707409B (zh) | 一种纳米全硅Beta分子筛的绿色制备方法 | |
CN110639602B (zh) | 用于生产一乙醇胺和二乙醇胺的催化剂 | |
CN110590580B (zh) | 一乙醇胺和二乙醇胺的制备方法 | |
CN107265474B (zh) | 一种蜂窝六边形钛硅分子筛及其制备方法和用途 | |
CN114632539B (zh) | 一种乙醇氨化脱氢制备乙腈催化剂及其制备方法、应用 | |
CN110745840A (zh) | 一种ecr-1沸石及其制备方法和应用 | |
CN110586169B (zh) | 合成一乙醇胺和二乙醇胺的催化剂 | |
CN110639605B (zh) | 用于增产一乙醇胺和二乙醇胺的催化剂 | |
CN110586175B (zh) | 增产一乙醇胺和二乙醇胺的催化剂 | |
CN110590578B (zh) | 制备一乙醇胺和二乙醇胺的方法 | |
CN115043414B (zh) | 一种多级孔分子筛及其制备方法和应用 | |
CN110642727B (zh) | 用于增产一乙醇胺和二乙醇胺的方法 | |
CN110586170B (zh) | 一乙醇胺和二乙醇胺催化剂的钝化方法 | |
CN110586171B (zh) | 生产一乙醇胺和二乙醇胺的催化剂 | |
CN110586168B (zh) | 制备一乙醇胺和二乙醇胺的催化剂 | |
CN110642729B (zh) | 用于合成一乙醇胺和二乙醇胺的方法 | |
CN110590579B (zh) | 合成一乙醇胺和二乙醇胺的方法 | |
CN110639601B (zh) | 用于合成一乙醇胺和二乙醇胺的催化剂 | |
CN117339624A (zh) | 用于环己酮肟气相重排反应的mfi型分子筛催化剂及其制备方法 |
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 | ||
TA01 | Transfer of patent application right | ||
TA01 | Transfer of patent application right |
Effective date of registration: 20221107 Address after: Room 104-81, Building 39, No. 128, Yongfeng Road, Daxie Development Zone, Ningbo City, Zhejiang Province, 315812 (Domicile declaration and commitment pilot area) Applicant after: Ningbo Baichuan Management Consulting Partnership (Limited Partnership) Address before: 414000 14th floor, building 1, Junlin international new town, intersection of fenshuilong Road, baling East Road, Yueyanglou District, Yueyang City, Hunan Province Applicant before: Chen Tianran |
|
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220722 |