CN1900058A - 2,4-二氨基苯磺酸及其盐的合成方法 - Google Patents
2,4-二氨基苯磺酸及其盐的合成方法 Download PDFInfo
- Publication number
- CN1900058A CN1900058A CNA2006100290512A CN200610029051A CN1900058A CN 1900058 A CN1900058 A CN 1900058A CN A2006100290512 A CNA2006100290512 A CN A2006100290512A CN 200610029051 A CN200610029051 A CN 200610029051A CN 1900058 A CN1900058 A CN 1900058A
- Authority
- CN
- China
- Prior art keywords
- solvent
- mphenylenediamine
- oleum
- organic solvent
- sulfuric acid
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- JVMSQRAXNZPDHF-UHFFFAOYSA-N 2,4-diaminobenzenesulfonic acid Chemical compound NC1=CC=C(S(O)(=O)=O)C(N)=C1 JVMSQRAXNZPDHF-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 150000003839 salts Chemical class 0.000 title claims abstract description 8
- 230000002194 synthesizing effect Effects 0.000 title abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000003960 organic solvent Substances 0.000 claims abstract description 29
- 239000002904 solvent Substances 0.000 claims abstract description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910001867 inorganic solvent Inorganic materials 0.000 claims abstract description 11
- 239000003049 inorganic solvent Substances 0.000 claims abstract description 11
- 238000009835 boiling Methods 0.000 claims abstract description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 claims description 12
- -1 alkane aromatic hydrocarbons Chemical class 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 150000001721 carbon Chemical group 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 11
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 239000005864 Sulphur Substances 0.000 claims description 8
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 claims description 7
- RSJKGSCJYJTIGS-UHFFFAOYSA-N undecane Chemical compound CCCCCCCCCCC RSJKGSCJYJTIGS-UHFFFAOYSA-N 0.000 claims description 7
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 claims description 6
- QPUYECUOLPXSFR-UHFFFAOYSA-N 1-methylnaphthalene Chemical compound C1=CC=C2C(C)=CC=CC2=C1 QPUYECUOLPXSFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 6
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 6
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 6
- BTGRAWJCKBQKAO-UHFFFAOYSA-N adiponitrile Chemical compound N#CCCCCC#N BTGRAWJCKBQKAO-UHFFFAOYSA-N 0.000 claims description 6
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 6
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 6
- QARVLSVVCXYDNA-UHFFFAOYSA-N bromobenzene Chemical compound BrC1=CC=CC=C1 QARVLSVVCXYDNA-UHFFFAOYSA-N 0.000 claims description 6
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 claims description 6
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 6
- 150000002367 halogens Chemical class 0.000 claims description 6
- 229930195733 hydrocarbon Natural products 0.000 claims description 6
- BKIMMITUMNQMOS-UHFFFAOYSA-N nonane Chemical compound CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- IAHFWCOBPZCAEA-UHFFFAOYSA-N succinonitrile Chemical compound N#CCCC#N IAHFWCOBPZCAEA-UHFFFAOYSA-N 0.000 claims description 6
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 claims description 6
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000376 reactant Substances 0.000 claims description 5
- RVHSTXJKKZWWDQ-UHFFFAOYSA-N 1,1,1,2-tetrabromoethane Chemical compound BrCC(Br)(Br)Br RVHSTXJKKZWWDQ-UHFFFAOYSA-N 0.000 claims description 3
- AVGQTJUPLKNPQP-UHFFFAOYSA-N 1,1,1-trichloropropane Chemical compound CCC(Cl)(Cl)Cl AVGQTJUPLKNPQP-UHFFFAOYSA-N 0.000 claims description 3
- HGRZLIGHKHRTRE-UHFFFAOYSA-N 1,2,3,4-tetrabromobutane Chemical compound BrCC(Br)C(Br)CBr HGRZLIGHKHRTRE-UHFFFAOYSA-N 0.000 claims description 3
- RELMFMZEBKVZJC-UHFFFAOYSA-N 1,2,3-trichlorobenzene Chemical compound ClC1=CC=CC(Cl)=C1Cl RELMFMZEBKVZJC-UHFFFAOYSA-N 0.000 claims description 3
- FVHAWXWFPBPFOS-UHFFFAOYSA-N 1,2-dimethyl-3-nitrobenzene Chemical group CC1=CC=CC([N+]([O-])=O)=C1C FVHAWXWFPBPFOS-UHFFFAOYSA-N 0.000 claims description 3
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 claims description 3
- WLPXNBYWDDYJTN-UHFFFAOYSA-N 1-bromo-2,3-dimethylbenzene Chemical compound CC1=CC=CC(Br)=C1C WLPXNBYWDDYJTN-UHFFFAOYSA-N 0.000 claims description 3
- BFCFYVKQTRLZHA-UHFFFAOYSA-N 1-chloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1Cl BFCFYVKQTRLZHA-UHFFFAOYSA-N 0.000 claims description 3
- PXWYZLWEKCMTEZ-UHFFFAOYSA-N 1-ethyl-2-nitrobenzene Chemical compound CCC1=CC=CC=C1[N+]([O-])=O PXWYZLWEKCMTEZ-UHFFFAOYSA-N 0.000 claims description 3
- HZAWPPRBCALFRN-UHFFFAOYSA-N 1-methyl-4-[(4-methylphenyl)methyl]benzene Chemical compound C1=CC(C)=CC=C1CC1=CC=C(C)C=C1 HZAWPPRBCALFRN-UHFFFAOYSA-N 0.000 claims description 3
- HKTCLPBBJDIBGF-UHFFFAOYSA-N 1-phenyl-2-propan-2-ylbenzene Chemical group CC(C)C1=CC=CC=C1C1=CC=CC=C1 HKTCLPBBJDIBGF-UHFFFAOYSA-N 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- RZQPTLXXGHQIJD-UHFFFAOYSA-N chlorobenzene;n,n-dimethylmethanamine Chemical compound CN(C)C.ClC1=CC=CC=C1 RZQPTLXXGHQIJD-UHFFFAOYSA-N 0.000 claims description 3
- 150000008422 chlorobenzenes Chemical class 0.000 claims description 3
- 229940117389 dichlorobenzene Drugs 0.000 claims description 3
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical compound C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 claims description 3
- KXUHSQYYJYAXGZ-UHFFFAOYSA-N isobutylbenzene Chemical compound CC(C)CC1=CC=CC=C1 KXUHSQYYJYAXGZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003350 kerosene Substances 0.000 claims description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 3
- VLZLOWPYUQHHCG-UHFFFAOYSA-N nitromethylbenzene Chemical compound [O-][N+](=O)CC1=CC=CC=C1 VLZLOWPYUQHHCG-UHFFFAOYSA-N 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- YTZKOQUCBOVLHL-UHFFFAOYSA-N tert-butylbenzene Chemical compound CC(C)(C)C1=CC=CC=C1 YTZKOQUCBOVLHL-UHFFFAOYSA-N 0.000 claims description 3
- ZBOGUDPFEVIZIQ-UHFFFAOYSA-N toluene;dihydrochloride Chemical compound Cl.Cl.CC1=CC=CC=C1 ZBOGUDPFEVIZIQ-UHFFFAOYSA-N 0.000 claims description 3
- BYQADQLDVPAGSR-UHFFFAOYSA-N toluene;hydrobromide Chemical compound Br.CC1=CC=CC=C1 BYQADQLDVPAGSR-UHFFFAOYSA-N 0.000 claims description 3
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 claims description 3
- IPOFQEDKXYAPBX-UHFFFAOYSA-N 1,4-diaminocyclohexa-2,4-diene-1-sulfonic acid Chemical compound NC1=CCC(N)(S(O)(=O)=O)C=C1 IPOFQEDKXYAPBX-UHFFFAOYSA-N 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 27
- 238000002360 preparation method Methods 0.000 abstract description 11
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 229940018564 m-phenylenediamine Drugs 0.000 abstract description 4
- JVMSQRAXNZPDHF-UHFFFAOYSA-M 2,4-diaminobenzenesulfonate Chemical compound NC1=CC=C(S([O-])(=O)=O)C(N)=C1 JVMSQRAXNZPDHF-UHFFFAOYSA-M 0.000 abstract 2
- 229920000137 polyphosphoric acid Polymers 0.000 abstract 1
- 239000012074 organic phase Substances 0.000 description 12
- 239000013078 crystal Substances 0.000 description 9
- 239000012954 diazonium Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-O diazynium Chemical compound [NH+]#N IJGRMHOSHXDMSA-UHFFFAOYSA-O 0.000 description 9
- 238000004128 high performance liquid chromatography Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 238000010189 synthetic method Methods 0.000 description 9
- 238000004448 titration Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 7
- 238000010792 warming Methods 0.000 description 7
- 238000006277 sulfonation reaction Methods 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000004818 1,2-dichlorobenzenes Chemical class 0.000 description 2
- AUHZEENZYGFFBQ-UHFFFAOYSA-N 1,3,5-trimethylbenzene Chemical compound CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- XKEFYDZQGKAQCN-UHFFFAOYSA-N 1,3,5-trichlorobenzene Chemical compound ClC1=CC(Cl)=CC(Cl)=C1 XKEFYDZQGKAQCN-UHFFFAOYSA-N 0.000 description 1
- ZSBCZEFDYNLRQQ-UHFFFAOYSA-N 2,4-diaminobenzenesulfonic acid;sodium Chemical compound [Na].NC1=CC=C(S(O)(=O)=O)C(N)=C1 ZSBCZEFDYNLRQQ-UHFFFAOYSA-N 0.000 description 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- SRSXLGNVWSONIS-UHFFFAOYSA-M benzenesulfonate Chemical compound [O-]S(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-M 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/32—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of salts of sulfonic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/02—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
- C07C303/04—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof by substitution of hydrogen atoms by sulfo or halosulfonyl groups
- C07C303/06—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof by substitution of hydrogen atoms by sulfo or halosulfonyl groups by reaction with sulfuric acid or sulfur trioxide
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2006100290512A CN100386312C (zh) | 2006-07-18 | 2006-07-18 | 2,4-二氨基苯磺酸及其盐的合成方法 |
PCT/CN2007/070308 WO2008011830A1 (fr) | 2006-07-18 | 2007-07-17 | Procédé de synthèse de 2,4-diamino benzène sulfonique et de sels de ce dernier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2006100290512A CN100386312C (zh) | 2006-07-18 | 2006-07-18 | 2,4-二氨基苯磺酸及其盐的合成方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1900058A true CN1900058A (zh) | 2007-01-24 |
CN100386312C CN100386312C (zh) | 2008-05-07 |
Family
ID=37656081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB2006100290512A Expired - Fee Related CN100386312C (zh) | 2006-07-18 | 2006-07-18 | 2,4-二氨基苯磺酸及其盐的合成方法 |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN100386312C (zh) |
WO (1) | WO2008011830A1 (zh) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008011830A1 (fr) * | 2006-07-18 | 2008-01-31 | Shanghai World-Prospect International Co., Ltd. | Procédé de synthèse de 2,4-diamino benzène sulfonique et de sels de ce dernier |
CN102516137A (zh) * | 2011-12-08 | 2012-06-27 | 江苏远征化工有限公司 | 2,4-二氨基苯磺酸及其盐的生产方法 |
CN103553982A (zh) * | 2013-08-22 | 2014-02-05 | 上海鸿源鑫创材料科技有限公司 | 2,4-二氨基苯磺酸钠的制备工艺 |
CN108675946A (zh) * | 2018-06-21 | 2018-10-19 | 中北大学 | 一种制备2,4-二氨基苯磺酸的方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI1014275B8 (pt) | 2009-04-24 | 2021-05-25 | Iceutica Pty Ltd | composição que compreende partículas de indometacina dispersas em pelo menos dois materiais de moagem parcialmente moídos |
US9526734B2 (en) | 2014-06-09 | 2016-12-27 | Iceutica Pty Ltd. | Formulation of meloxicam |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5748961A (en) * | 1980-09-05 | 1982-03-20 | Sumitomo Chem Co Ltd | Preparation of 2,4-diaminobenzenesulfonic acid |
JPH0413657A (ja) * | 1990-05-08 | 1992-01-17 | Nissan Chem Ind Ltd | 2,4―ジアミノベンゼンスルホン酸の製造方法 |
DE10243028A1 (de) * | 2002-09-17 | 2004-03-25 | Bayer Ag | Verfahren zur Herstellung isolierter 3,4-Diaminobenzolsulfonsäure |
CN1721398A (zh) * | 2005-06-24 | 2006-01-18 | 上海世景国际贸易有限公司 | 一种2,4-二氨基苯磺酸及其钠盐的合成方法 |
CN100386312C (zh) * | 2006-07-18 | 2008-05-07 | 上海世景国际贸易有限公司 | 2,4-二氨基苯磺酸及其盐的合成方法 |
-
2006
- 2006-07-18 CN CNB2006100290512A patent/CN100386312C/zh not_active Expired - Fee Related
-
2007
- 2007-07-17 WO PCT/CN2007/070308 patent/WO2008011830A1/zh active Application Filing
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008011830A1 (fr) * | 2006-07-18 | 2008-01-31 | Shanghai World-Prospect International Co., Ltd. | Procédé de synthèse de 2,4-diamino benzène sulfonique et de sels de ce dernier |
CN102516137A (zh) * | 2011-12-08 | 2012-06-27 | 江苏远征化工有限公司 | 2,4-二氨基苯磺酸及其盐的生产方法 |
CN103553982A (zh) * | 2013-08-22 | 2014-02-05 | 上海鸿源鑫创材料科技有限公司 | 2,4-二氨基苯磺酸钠的制备工艺 |
CN108675946A (zh) * | 2018-06-21 | 2018-10-19 | 中北大学 | 一种制备2,4-二氨基苯磺酸的方法 |
Also Published As
Publication number | Publication date |
---|---|
CN100386312C (zh) | 2008-05-07 |
WO2008011830A1 (fr) | 2008-01-31 |
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Denomination of invention: Synthesis method of 2,4-diaminobenzenesulfonic acid and its salt Effective date of registration: 20110411 Granted publication date: 20080507 Pledgee: Pudong Productivity Promotion Center, Shanghai Pledgor: Shanghai Shi Jing International Trading Co., Ltd.|Shanghai World Exhibition Industrial Co., Ltd. Registration number: 2011990000116 |
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Owner name: SHANGHAI WORLD-PROSPECT CHEM. TECH. CO., LTD. SHAN Free format text: FORMER OWNER: SHANGHAI WORLD-PROSPECT INDUSTRY CO., LTD. |
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Free format text: CORRECT: ADDRESS; FROM: 200233 XUHUI, SHANGHAI TO: 200131 PUDONG NEW AREA, SHANGHAI |
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CF01 | Termination of patent right due to non-payment of annual fee |