CN108002984A - 从萘连续制备(α、β)萘酚钠的生产***及方法 - Google Patents
从萘连续制备(α、β)萘酚钠的生产***及方法 Download PDFInfo
- Publication number
- CN108002984A CN108002984A CN201710825467.3A CN201710825467A CN108002984A CN 108002984 A CN108002984 A CN 108002984A CN 201710825467 A CN201710825467 A CN 201710825467A CN 108002984 A CN108002984 A CN 108002984A
- Authority
- CN
- China
- Prior art keywords
- naphthalene
- reactor
- joint
- continuous
- alkali
- 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
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 title claims abstract description 378
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 55
- ZBNNKSSSCSTNNK-UHFFFAOYSA-M sodium;naphthalen-1-olate Chemical compound [Na+].C1=CC=C2C([O-])=CC=CC2=C1 ZBNNKSSSCSTNNK-UHFFFAOYSA-M 0.000 title claims abstract description 34
- 239000003513 alkali Substances 0.000 claims abstract description 86
- 238000006277 sulfonation reaction Methods 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 230000004927 fusion Effects 0.000 claims abstract description 32
- 230000004044 response Effects 0.000 claims abstract description 31
- 230000006835 compression Effects 0.000 claims abstract description 29
- 238000007906 compression Methods 0.000 claims abstract description 29
- 238000004064 recycling Methods 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 153
- 239000007788 liquid Substances 0.000 claims description 87
- 238000006243 chemical reaction Methods 0.000 claims description 50
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 49
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 33
- 239000011552 falling film Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 16
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 14
- 150000001720 carbohydrates Chemical class 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000012546 transfer Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- RWYGQIQKHRMKFH-UHFFFAOYSA-N naphthalene;sulfuric acid Chemical compound OS(O)(=O)=O.C1=CC=CC2=CC=CC=C21 RWYGQIQKHRMKFH-UHFFFAOYSA-N 0.000 claims 1
- 239000002351 wastewater Substances 0.000 abstract description 10
- 238000010924 continuous production Methods 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 3
- 239000005416 organic matter Substances 0.000 abstract description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 49
- 239000000047 product Substances 0.000 description 25
- 239000002253 acid Substances 0.000 description 17
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical compound C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 description 15
- 230000000694 effects Effects 0.000 description 13
- 230000008901 benefit Effects 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 8
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000010669 acid-base reaction Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- 239000000543 intermediate Substances 0.000 description 4
- 238000006386 neutralization reaction Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- FCPGLSSNBUVLLD-UHFFFAOYSA-N naphthalen-1-ol;sodium Chemical compound [Na].C1=CC=C2C(O)=CC=CC2=C1 FCPGLSSNBUVLLD-UHFFFAOYSA-N 0.000 description 3
- ZNYPFGRLOVXIFH-UHFFFAOYSA-N naphthalen-2-ol;sodium Chemical compound [Na].C1=CC=CC2=CC(O)=CC=C21 ZNYPFGRLOVXIFH-UHFFFAOYSA-N 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- HIEHAIZHJZLEPQ-UHFFFAOYSA-M sodium;naphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 HIEHAIZHJZLEPQ-UHFFFAOYSA-M 0.000 description 3
- 238000010183 spectrum analysis Methods 0.000 description 3
- -1 2- naphthylamine sulfonic acids Chemical class 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000007499 fusion processing Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000005580 one pot reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XTHPWXDJESJLNJ-UHFFFAOYSA-N sulfurochloridic acid Chemical compound OS(Cl)(=O)=O XTHPWXDJESJLNJ-UHFFFAOYSA-N 0.000 description 2
- KSTGSVANFMJGGB-UHFFFAOYSA-N 2-ethylnaphthalen-1-ol Chemical compound C1=CC=CC2=C(O)C(CC)=CC=C21 KSTGSVANFMJGGB-UHFFFAOYSA-N 0.000 description 1
- PJKVFARRVXDXAD-UHFFFAOYSA-N 2-naphthaldehyde Chemical compound C1=CC=CC2=CC(C=O)=CC=C21 PJKVFARRVXDXAD-UHFFFAOYSA-N 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- ZRXADTFMGYNRKV-UHFFFAOYSA-N [S].C1=CC=CC2=CC=CC=C21 Chemical compound [S].C1=CC=CC2=CC=CC=C21 ZRXADTFMGYNRKV-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010812 external standard method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/64—Preparation of O-metal compounds with O-metal group bound to a carbon atom belonging to a six-membered aromatic ring
-
- 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
-
- 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
- C07C303/42—Separation; Purification; Stabilisation; Use of additives
- C07C303/44—Separation; Purification
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B2200/00—Indexing scheme relating to specific properties of organic compounds
- C07B2200/09—Geometrical isomers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710825467.3A CN108002984B (zh) | 2017-09-14 | 2017-09-14 | 从萘连续制备(α、β)萘酚钠的生产***及方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710825467.3A CN108002984B (zh) | 2017-09-14 | 2017-09-14 | 从萘连续制备(α、β)萘酚钠的生产***及方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN108002984A true CN108002984A (zh) | 2018-05-08 |
CN108002984B CN108002984B (zh) | 2021-02-19 |
Family
ID=62050928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710825467.3A Active CN108002984B (zh) | 2017-09-14 | 2017-09-14 | 从萘连续制备(α、β)萘酚钠的生产***及方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN108002984B (zh) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1513824A (zh) * | 2003-08-18 | 2004-07-21 | 常州市华达化工厂 | 联产甲萘酚和乙萘酚的制备方法 |
CN1557807A (zh) * | 2004-01-18 | 2004-12-29 | 阳 李 | 在乙萘酚生产中2-萘磺酸钠盐制备的改进工艺 |
CN1958567A (zh) * | 2006-10-17 | 2007-05-09 | 江苏华达化工集团有限公司 | 一种1-萘磺酸和1-萘磺酸钠盐的制备方法 |
CN104016835A (zh) * | 2014-06-24 | 2014-09-03 | 湖北鑫慧化工有限公司 | 一种2-萘酚磺化碱熔优化生产工艺 |
CN104193593A (zh) * | 2014-09-26 | 2014-12-10 | 青岛奥盖克化工股份有限公司 | 一种液相碱熔法生产2-萘酚的环保制备工艺 |
CN104693009A (zh) * | 2015-03-04 | 2015-06-10 | 肖刚学 | 萘磺化产物直接碱熔联产1-萘酚和2-萘酚的方法 |
-
2017
- 2017-09-14 CN CN201710825467.3A patent/CN108002984B/zh active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1513824A (zh) * | 2003-08-18 | 2004-07-21 | 常州市华达化工厂 | 联产甲萘酚和乙萘酚的制备方法 |
CN1557807A (zh) * | 2004-01-18 | 2004-12-29 | 阳 李 | 在乙萘酚生产中2-萘磺酸钠盐制备的改进工艺 |
CN1958567A (zh) * | 2006-10-17 | 2007-05-09 | 江苏华达化工集团有限公司 | 一种1-萘磺酸和1-萘磺酸钠盐的制备方法 |
CN104016835A (zh) * | 2014-06-24 | 2014-09-03 | 湖北鑫慧化工有限公司 | 一种2-萘酚磺化碱熔优化生产工艺 |
CN104193593A (zh) * | 2014-09-26 | 2014-12-10 | 青岛奥盖克化工股份有限公司 | 一种液相碱熔法生产2-萘酚的环保制备工艺 |
CN104693009A (zh) * | 2015-03-04 | 2015-06-10 | 肖刚学 | 萘磺化产物直接碱熔联产1-萘酚和2-萘酚的方法 |
Also Published As
Publication number | Publication date |
---|---|
CN108002984B (zh) | 2021-02-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106745246B (zh) | 一种制备硫酸氧钒的方法 | |
CN104693009A (zh) | 萘磺化产物直接碱熔联产1-萘酚和2-萘酚的方法 | |
CN109400446A (zh) | 一种对甲苯酚的制备方法及设备 | |
CN105129852B (zh) | 一种高效自循环湿法连续制备红矾钠的*** | |
CN113045458B (zh) | 连续式氨解反应***、牛磺酸碱金属盐及牛磺酸的制备方法 | |
CN112794290B (zh) | 处理焦炉煤气脱硫产低品质硫磺及副盐废液工艺及*** | |
CN214780762U (zh) | 处理焦炉煤气脱硫产低品质硫磺及副盐废液*** | |
CN207362101U (zh) | 一种工业萘精加工生产线 | |
CN105085338A (zh) | 二甲基二硫的生产方法及装置 | |
WO2021114460A1 (zh) | 基于连续流反应的双温区两段法生产对乙酰胺基苯磺酰氯的方法 | |
CN108002984A (zh) | 从萘连续制备(α、β)萘酚钠的生产***及方法 | |
CN207313481U (zh) | 萘连续磺化的生产*** | |
CN212610358U (zh) | 一种间苯二酚生产*** | |
CN215667169U (zh) | 一种高纯八水合氢氧化钡提纯生产*** | |
CN207405109U (zh) | 一种减水剂生产*** | |
CN105566171B (zh) | 一种制备h‑酸的装置 | |
CN205933523U (zh) | 一种edta高盐有机废水处理及资源回收*** | |
CN109369469A (zh) | 连续反应制备clt酸氯化物的方法 | |
CN214167372U (zh) | 一种回收利用稀盐酸尾气制备氯化亚锡的*** | |
CN211800862U (zh) | 一种连续酯化反应装置 | |
CN111320762B (zh) | 一种从制浆黑液制备酸析木质素和木质素磺酸钠的***及工艺 | |
CN106146356B (zh) | 连续生产1-萘磺酸的方法 | |
CN205856358U (zh) | 1‑萘磺酸的连续生产装置 | |
CN105753744B (zh) | 一种具有节能功效的h‑酸制备装置 | |
CN205023875U (zh) | 一种高效自循环湿法连续制备红矾钠的*** |
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 | ||
GR01 | Patent grant | ||
GR01 | Patent grant | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Continuous preparation from naphthalene( a b) Production system and method of naphthol sodium Effective date of registration: 20210809 Granted publication date: 20210219 Pledgee: Chongqing chemical medicine holding (Group) Co.,Ltd. Pledgor: Chongqing Unisplendour Chemical Co.,Ltd. Registration number: Y2021500000036 |
|
PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220727 Granted publication date: 20210219 Pledgee: Chongqing chemical medicine holding (Group) Co.,Ltd. Pledgor: Chongqing Unisplendour Chemical Co.,Ltd. Registration number: Y2021500000036 |
|
PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Production system and method for continuous preparation of (a, b) sodium naphthol from naphthalene Effective date of registration: 20220811 Granted publication date: 20210219 Pledgee: Chongqing chemical medicine holding (Group) Co.,Ltd. Pledgor: Chongqing Unisplendour Chemical Co.,Ltd. Registration number: Y2022500000056 |
|
PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230310 Granted publication date: 20210219 Pledgee: Chongqing chemical medicine holding (Group) Co.,Ltd. Pledgor: Chongqing Unisplendour Chemical Co.,Ltd. Registration number: Y2022500000056 |
|
PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Continuous preparation from naphthalene( a b) Production system and method of sodium naphthol Effective date of registration: 20230317 Granted publication date: 20210219 Pledgee: Chongqing chemical medicine holding (Group) Co.,Ltd. Pledgor: Chongqing Unisplendour Chemical Co.,Ltd. Registration number: Y2023500000020 |
|
PE01 | Entry into force of the registration of the contract for pledge of patent right |