CN102558779B - Method for recycling waste polyester-cotton textiles - Google Patents
Method for recycling waste polyester-cotton textiles Download PDFInfo
- Publication number
- CN102558779B CN102558779B CN2011104014955A CN201110401495A CN102558779B CN 102558779 B CN102558779 B CN 102558779B CN 2011104014955 A CN2011104014955 A CN 2011104014955A CN 201110401495 A CN201110401495 A CN 201110401495A CN 102558779 B CN102558779 B CN 102558779B
- Authority
- CN
- China
- Prior art keywords
- ethylene glycol
- alcoholysis
- polyester
- cotton
- recycling
- 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.)
- Active
Links
Images
Classifications
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a method for recycling waste polyester-cotton textiles. A recycling polymerization system (1) and a byproduct collection and solvent recycling purification system (2) are involved in the method. The waste polyester-cotton textiles are continuously treated, so that polyester and cotton fibers in the waste polyester-cotton textiles are recycled, the waste polyester-cotton textiles are recycled on a large scale, the requirement of people on the increment of textile fibers is met, the dependence degree of industry on petroleum is reduced, energy is saved, emission is reduced, the environment is protected, the sustainable development of textile industry is promoted, and the circular economy of polyester industry is developed.
Description
Technical field
The invention belongs to the resource recovery field, more specifically, the present invention relates to a kind of method of useless polyester-cotton textiles recycling, the method is for the useless polyester-cotton textiles of continuous treatment and makes it be recycled the industrialization recovery method of recycling.
Background technology
Along with improving constantly of people's living standard, demand to textiles constantly enlarges, natural fiber can not satisfy people's demand already, regenerated fiber has become the main body in the textile raw material, and terylene is as the maximum kind in China's chemical fibre industry, and its production capacity had reached more than 2,900 ten thousand tons in 2010, account for more than 2/3 of the world, and the trevira that the oil conversion is produced has accounted for great proportion in regenerated fiber, and the anxiety of oil has affected again the production of trevira.Therefore, the space-pollution of Polyester Textiles will be more outstanding, thereby reclaim on a large scale Polyester Textiles recycling and have very urgent.Regenerated Polyester Fibres with useless polyester product remanufacture had both solved the direct dependence to oil, had reduced again white pollution, became a main direction of Green Textile Base future development.
The recycling of polyester is very important field during polymer is recycled.The waste polyester recovery technology is divided into physics recovery technology and the large class of chemical recovery technology two.It is with the waste polyester heating and melting that physics reclaims, and after purifying, by the screw extruder extrusion moulding, general process is: classification-broken-cleaning-dehydration-thousand dry-granulations (spinning).Chemical recovery method is by chemical reaction, waste polyester to be depolymerized to low molecular compound such as terephthalic acid (TPA), dimethyl terephthalate (DMT) (DMT), ethylene glycol terephthalate (BHET), the different new ester of terephthalic acid two (DOTP), L--alcohol (EG) etc., can be again as polyester raw material after alcoholysis product is purified, or make other products.Chemical recovery method comprises that also chemistry improves, and usually adopts the chain modification, cross-linking modified, chlorination modified etc. changes chain length, the structure of polyester, thereby improve its some characteristic.
At present, be nearly all also to be confined to the PET bottle recovery field both at home and abroad in the useless polyester product field of reclaiming, for example the U.S. utilizes useless PET bottle through the methyl alcohol alcoholysis, production dimethyl terephthalate (DMT) and hexylene glycol, more directly carry out polycondensation and prepare new polyester.These major parts are all that the Application Areas originally according to raw material reclaims degradation and uses.
Recently, carried out relevant report to reclaiming polyester-containing textiles abroad, namely from " fiber is to the regeneration technology ".This technology refers to the trevira products such as used uniform, Sportswear are carried out chemical treatment, restores polyester raw material, then produces the process of the trevira product that makes new advances.At present, Japanese Supreme Being people company carries out this business in the Guia Hill of Japan Ehime Prefecture cause.Dupont also is studied this, and what it reclaimed employing is the methyl alcohol alcoholysis method, is DMT and EG with the polyester depolymerization.But these processing methodes are the method to pure trevira and batch process mostly, and fail to carry out serialization, the industrializing implementation degree is low, the solvent toxicity that adopts simultaneously is strong, the cleaning manufacturing technique method that does not provide solvent cycle to utilize.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of useless polyester-cotton textiles recycling method, reclaim the trevira recycling that obtains high viscosity, high added value, the recycle that realizes reclaiming simultaneously solvent has guaranteed the cleaner production of this industrialization technology.
The present invention realizes by following technical scheme:
A kind of method of useless polyester-cotton textiles recycling, it recycles useless polyester-cotton textiles by following two large treatment systems:
(1) paradigmatic system of recycling;
(2) purification system that by product is collected and solvent cycle is utilized.
The paradigmatic system of described recycling comprises following three parts:
(1) useless polyester-cotton textiles raw materials melt alcoholysis system;
(2) polycondensation system;
(3) Masterbatch injected system;
The treating processes of the purification system of described by product collection and solvent cycle utilization comprises following six steps:
(1) ethylene glycol of extracting out from the alcoholysis still of the paradigmatic system of recycling enters an ethylene glycol lightness-removing column, removes the light constituent in alcoholysis ethylene glycol, to light constituent, has obtained not containing the ethylene glycol of light constituent in overhead collection at the bottom of tower;
(2) ethylene glycol after the ethylene glycol lightness-removing column is processed enters an ethylene glycol weight-removing column and processes, and the heavy constituent at the bottom of tower is carried out collection and treatment, obtains purity greater than 85% ethylene glycol at tower top;
(3) be divided into four parts from ethylene glycol weight-removing column high purity ethylene glycol out: first part removes the alcoholysis still, for alcoholysis melting operation provides alcoholysis ethylene glycol, second section removes the squirt pump of vacuum system through the ethylene glycol vaporizer of vacuum system, third part enters ethylene glycol squirt pump hot well, and last part is got back to fresh ethylene glycol storage tank;
(4) ethylene glycol of ethylene glycol squirt pump hot well through the ethylene glycol hot well of the whole polycondensation vessel of pump input, is used for the ethylene glycol spray of whole polycondensation vessel;
(5) the ethylene glycol hot well overflow of whole polycondensation vessel enters precondensation moral ethylene glycol hot well, is used for the ethylene glycol spray of precondensation still, and in the ethylene glycol that this part produces, other component concentration is higher, returns the ethylene glycol lightness-removing column and carries out circular treatment;
(6) the spent glycol storage tank constantly replenishes the amount of the ethylene glycol of whole device consumption, partly is delivered to simultaneously retrieving arrangement and uses, and forms the system of a circulation closed.
The treating processes of described useless polyester-cotton textiles raw materials melt alcoholysis system comprises the steps:
(1) useless polyester-cotton blend cloth fragmentation enters cloth waste melting machine by feed bin, add simultaneously alcoholysis ethylene glycol to carry out partial alcoholysis to it, the amount of heated glycol is the 5%-2000% of useless polyester-cotton textiles quality, the temperature of melting alcoholysis is 150-265 ℃, is absolute pressure 1000Pa-10000Pa in the vacuum tightness of the alcoholysis process of alcoholysis still;
(2) alcohol solves to wash to filter through the polyester-cotton blend strainer with cotton fibre and has realized cotton fibre and washed separating of alcoholysate, and the cotton fibre that obtains reclaims aftertreatment.
The treating processes of described polycondensation system comprises the steps:
(1) to enter three phases be precondensation stage to the material after the further alcoholysis of alcoholysis still, deviate from small molecules in alcoholysate or/and add catalyzer before entering precondensation stage, carry out simultaneously the partially polymerized pressure that need to increase substantially material viscosity to reduce whole polycondensation vessel, this stage need to carry out under certain negative pressure, the temperature of this process is controlled at 250-280 ℃, and vacuum tightness is absolute pressure 1000Pa-5000Pa;
(2) material after precondensation stage is processed enters the poly-stage of final minification, and the poly-tackify still that adopts of final minification is deviate from ethylene glycol and other small molecules, and the temperature of this process is controlled at 250-295 ℃, and its vacuum degree control is absolute pressure 50Pa-500Pa.
The treating processes of described Masterbatch injected system is with the melt-mixing after described Masterbatch and polycondensation.
Beneficial effect of the present invention is:
The method of waste spinning fabric disclosed by the invention recycling, the serialization recycling of extensive waste spinning fabric will be realized, through engineering approaches is strong, and the solvent that adopts in removal process can recycle, method successful implementation of the present invention will satisfied people to requiring under prerequisite that textile fibres increases, can reduce the demand to oil, reduce industrial goods production discharge capacity.Reduced simultaneously pollution, the enabling environment protection promotes the weaving Sustainable development.The state of the art and the characteristics that meet textile industry realize the recycling economy of PET industry.
Description of drawings
Fig. 1 is the process flow sheet of useless polyester-cotton textiles recycling;
Fig. 2 is the recycle process for cleanly preparing schema of solvent for use.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
Take useless polyester cotton blending textiles 120kg/h, enter the screw rod melting, add ethylene glycol 600kg/h toward screw rod simultaneously, be 200 ℃ of lower alcoholysis 10min in normal pressure, temperature, after carrying out the alcoholysis melting, processes through the polyester-cotton blend filtering system again by cloth waste melting machine, reclaim cotton fibre and carry out follow-up clean, and the pure alcoholysate of washing of separating enters the alcoholysis still, carry out further alcoholysis under little negative pressure, temperature is 250 ℃ of lower alcoholysis 10min, guaranteed the abundant alcoholysis of useless polyester, the ethylene glycol that this stage extracts out enters the ethylene glycol treatment system.Material after the further alcoholysis of alcoholysis still enters precondensation stage, add catalyzer 0.5g/h before entering precondensation stage, being made into catalyst glycol concentration is 30%, be 1000Pa in vacuum tightness, temperature of reaction is 280 ℃, reaction times is 30min, deviate from the small molecules in alcoholysate, simultaneously partially polymerized, it is poly-that the material after precondensation is processed enters final minification, at vacuum tightness＜100Pa, temperature of reaction is 285 ℃, be 100min between reaction is seasonable, deviate from the small molecules such as ethylene glycol, the limiting viscosity＞0.67dl/g of the polyester that obtains regenerating.
Embodiment 2
Take useless polyester cotton blending textiles 150kg/h, enter the screw rod melting, add ethylene glycol 700kg/h toward screw rod simultaneously, be 200 ℃ of lower alcoholysis 10min in normal pressure, temperature, after carrying out the alcoholysis melting, processes through the polyester-cotton blend filtering system again by cloth waste melting machine, reclaim cotton fibre and carry out follow-up clean, and the pure alcoholysate of washing of separating enters the alcoholysis still, carry out further alcoholysis under little negative pressure, temperature is 250 ℃ of lower alcoholysis 10min, guaranteed the abundant alcoholysis of useless polyester, the ethylene glycol that this stage extracts out enters the ethylene glycol treatment system.Material after the further alcoholysis of alcoholysis still enters precondensation stage, add catalyzer 0.5g/h before entering precondensation stage, being made into catalyst glycol concentration is 30%, be 1000Pa in vacuum tightness, temperature of reaction is 280 ℃, reaction times is 30min, deviate from the small molecules in alcoholysate, simultaneously partially polymerized, it is poly-that the material after precondensation is processed enters final minification, at vacuum tightness＜100Pa, temperature of reaction is 290 ℃, be 100min between reaction is seasonable, deviate from the small molecules such as ethylene glycol, the limiting viscosity＞0.70dl/g of the polyester that obtains regenerating.
Embodiment 3
Take useless polyester cotton blending textiles 2000kg/h, enter the screw rod melting, add ethylene glycol 800kg/h toward screw rod simultaneously, be 200 ℃ of lower alcoholysis 10min in normal pressure, temperature, after carrying out the alcoholysis melting, processes through the polyester-cotton blend filtering system again by cloth waste melting machine, reclaim cotton fibre and carry out follow-up clean, and the pure alcoholysate of washing of separating enters the alcoholysis still, carry out further alcoholysis under little negative pressure, temperature is 250 ℃ of lower alcoholysis 10min, guaranteed the abundant alcoholysis of useless polyester, the ethylene glycol that this stage extracts out enters the ethylene glycol treatment system.Material after the further alcoholysis of alcoholysis still enters precondensation stage, add catalyzer 0.5g/h before entering precondensation stage, being made into catalyst glycol concentration is 30%, be 1000Pa in vacuum tightness, temperature of reaction is 280 ℃, reaction times is 30min, deviate from the small molecules in alcoholysate, simultaneously partially polymerized, it is poly-that the material after precondensation is processed enters final minification, at vacuum tightness＜100Pa, temperature of reaction is 285 ℃, be 100min between reaction is seasonable, deviate from the small molecules such as ethylene glycol, the limiting viscosity＞0.70dl/g of the polyester that obtains regenerating.
Embodiment 4
Come the ethylene glycol 100kg/h of the alcoholysis still extraction of autonomous technique retrieving arrangement, entering an ethylene glycol lightness-removing column processes, remove the light constituent in alcoholysis ethylene glycol, collect to light constituent and with this part light constituent in overhead collection and carry out the export trade processing, obtained the ethylene glycol 98kg/h of light constituent at the bottom of tower, entered an ethylene glycol weight-removing column and process, the heavy constituent at the bottom of tower has been collected export trade process, obtain highly purified ethylene glycol 94kg/h at tower top, purity is＞85%.
Should be appreciated that above narration is only example and illustrative for the present invention who sets forth as claim, is limited it.The of the present invention content disclosed according to this paper, other embodiment of the present invention is apparent for a person skilled in the art.Should be noted that this specification sheets and embodiment only should be regarded as is example, and actual range of the present invention should be determined by claim.
Claims (1)
1. the method for a useless polyester-cotton textiles recycling is characterized in that: by following two large treatment systems, useless polyester-cotton textiles is recycled:
(1) paradigmatic system of recycling;
(2) purification system that by product is collected and solvent cycle is utilized;
The paradigmatic system of described recycling comprises following three parts:
(1) useless polyester-cotton textiles raw materials melt alcoholysis system;
(2) polycondensation system;
(3) Masterbatch injected system;
The treating processes of the purification system of described by product collection and solvent cycle utilization comprises following six steps: the ethylene glycol that extract out from the alcoholysis still of the paradigmatic system of recycling (1) enters an ethylene glycol lightness-removing column, remove the light constituent in alcoholysis ethylene glycol, to light constituent, obtained not containing the ethylene glycol of light constituent in overhead collection at the bottom of tower;
(2) ethylene glycol after the ethylene glycol lightness-removing column is processed enters an ethylene glycol weight-removing column and processes, and the heavy constituent at the bottom of tower is carried out collection and treatment, obtains purity greater than 85% ethylene glycol at tower top;
(3) be divided into four parts from ethylene glycol weight-removing column high purity ethylene glycol out: first part removes the alcoholysis still, for alcoholysis melting operation provides alcoholysis ethylene glycol, second section removes the squirt pump of vacuum system through the ethylene glycol vaporizer of vacuum system, third part enters ethylene glycol squirt pump hot well, and last part is got back to fresh ethylene glycol storage tank;
(4) ethylene glycol of ethylene glycol squirt pump hot well through the ethylene glycol hot well of the whole polycondensation vessel of pump input, is used for the ethylene glycol spray of whole polycondensation vessel;
(5) the ethylene glycol hot well overflow of whole polycondensation vessel enters precondensation moral ethylene glycol hot well, is used for the ethylene glycol spray of precondensation still, and in the ethylene glycol that this part produces, other component concentration is higher, returns the ethylene glycol lightness-removing column and carries out circular treatment;
(6) the spent glycol storage tank constantly replenishes the amount of the ethylene glycol of whole device consumption, partly is delivered to simultaneously retrieving arrangement and uses, and forms the system of a circulation closed;
The treating processes of described useless polyester-cotton textiles raw materials melt alcoholysis system comprises the steps:
(1) useless polyester-cotton blend cloth fragmentation enters cloth waste melting machine by feed bin, add simultaneously alcoholysis ethylene glycol to carry out partial alcoholysis to it, the amount of heated glycol is the 5%-2000% of useless polyester-cotton textiles quality, the temperature of melting alcoholysis is 150-265 ℃, is absolute pressure 1000Pa-10000Pa in the vacuum tightness of the alcoholysis process of alcoholysis still;
(2) washing with cotton fibre of alcoholysis realized cotton fibre and washed separating of alcoholysate through the filtration of polyester-cotton blend strainer, and the cotton fibre that obtains reclaims aftertreatment;
The treating processes of described polycondensation system comprises the steps:
(1) to enter three phases be precondensation stage to the material after the further alcoholysis of alcoholysis still, deviate from small molecules in alcoholysate or/and add catalyzer before entering precondensation stage, carry out simultaneously the partially polymerized pressure that need to increase substantially material viscosity to reduce whole polycondensation vessel, this stage need to carry out under certain negative pressure, the temperature of this process is controlled at 250-280 ℃, and vacuum tightness is absolute pressure 1000Pa-5000Pa;
(2) material after precondensation stage is processed enters the poly-stage of final minification, and the poly-tackify still that adopts of final minification is deviate from ethylene glycol and other small molecules, and the temperature of this process is controlled at 250-295 ℃, and its vacuum degree control is absolute pressure
50Pa-500Pa；
The treating processes of described Masterbatch injected system is with the melt-mixing after described Masterbatch and polycondensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104014955A CN102558779B (en) | 2011-12-06 | 2011-12-06 | Method for recycling waste polyester-cotton textiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104014955A CN102558779B (en) | 2011-12-06 | 2011-12-06 | Method for recycling waste polyester-cotton textiles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102558779A CN102558779A (en) | 2012-07-11 |
| CN102558779B true CN102558779B (en) | 2013-06-26 |
Family
ID=46405470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104014955A Active CN102558779B (en) | 2011-12-06 | 2011-12-06 | Method for recycling waste polyester-cotton textiles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102558779B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731760B (en) * | 2012-07-17 | 2014-03-26 | 龙福环能科技股份有限公司 | Method for carrying out alcoholysis and then polymerization on recycled polyester bottle chip melts |
| CN103665426A (en) * | 2013-11-27 | 2014-03-26 | 青岛福创环境科技有限公司 | Method for recycling cotton fibers from waste clothes |
| CN106609405A (en) * | 2015-10-23 | 2017-05-03 | 南通金康弘纺织品有限公司 | Method for recovery and reutilization of waste cotton textile |
| CN106120028B (en) * | 2016-08-27 | 2018-10-23 | 安徽佳宝服饰有限公司 | A kind of tailoring cloth waste recycling disposal device |
| CN108641120A (en) * | 2018-08-14 | 2018-10-12 | 上海聚友化工有限公司 | A kind of method and its recovery system of the recycling of waste and old polyester textile |
| CN110333315A (en) * | 2019-06-11 | 2019-10-15 | 中塑联新材料科技湖北有限公司 | Low energy consumption is pollution-free complete utilization terylene waste spinning electronation PBT testing production line |
| CN113584641B (en) * | 2021-07-15 | 2022-11-11 | 江苏志成新材料科技有限公司 | Process for spinning regenerated fibers by complete alcoholysis of waste polyester textiles |
| CN113967658B (en) * | 2021-09-27 | 2022-08-30 | 嘉兴职业技术学院 | Terylene textile secondary recycling treatment device |
| IT202100031088A1 (en) | 2021-12-10 | 2023-06-10 | Marzoli Machines Textile Srl | METHOD OF PRODUCTION OF A COMPOSITE MATERIAL IN POLYMER MATRIX FROM TEXTILE WASTE |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061005B (en) * | 2010-11-19 | 2012-07-25 | 绍兴中纺院江南分院有限公司 | Polyester fiber or polyester fabric waste recycling method |
-
2011
- 2011-12-06 CN CN2011104014955A patent/CN102558779B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102558779A (en) | 2012-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102558779B (en) | Method for recycling waste polyester-cotton textiles | |
| CN102532815B (en) | Method for recycling waste polyester textiles | |
| CN103146151B (en) | Recycling method of waste polyester bottle | |
| CN102899729B (en) | The method of Waste Polyester textile processing Regenerated Polyester Staple Fiber dimension | |
| CN107652423B (en) | A kind of method of Waste Polyester alcoholysis method preparation regeneration low-melting point polyester | |
| CN102911396B (en) | A kind of recovery process of waste PET material | |
| CN104774153A (en) | Recycling method for catalytic degradation of waste PET | |
| CN102250379A (en) | Method for separation of terylene-cotton blended fabrics and repolymerization of terylene | |
| KR101130461B1 (en) | Method for Recycling Wasted Nylon Fish Net and Recycled Nylon filament fiber | |
| CN104327255A (en) | Device and process for continuously separating and recycling waste polyester cotton textiles | |
| CN103360260B (en) | Preparation technology of ethylene glycol terephthalate and preparation method of polyester | |
| CN102911395A (en) | Resourced recovering and utilizing method for waste cotton fabric | |
| CN1213096C (en) | Chenical recovery method for thermosetting epoxy compound material | |
| CN106167544A (en) | A kind of waste and old polyester recycling system | |
| CN111171373A (en) | Recovery method of fiber reinforced composite material | |
| CN112574404A (en) | Production device for producing PBT by recycling polyester to generate DMT | |
| CN202754932U (en) | Waste polyester cotton textile recycling system | |
| CN206956218U (en) | The spinning system of the waste and old non-woven cloth reworked material fiber of high additive | |
| CN102161615A (en) | Process for recovering 1,4-butanediol | |
| CN101413156B (en) | Spandex yarn alcoholysis production process | |
| CN109467743B (en) | Chemical regeneration method of waste polyester textiles, regenerated polyester and polyester thermal fuse | |
| CN107722249A (en) | A kind of method that Waste Polyester alcoholysis method prepares regeneration disperse dyeable polyester | |
| CN104003566B (en) | The recovery method of many components waste liquid in high-performance aramid fiber fibrid production process | |
| CN202440457U (en) | Recycling system for waste polyester textile | |
| WO2017067014A1 (en) | Method for recovering and reutilizing waste cotton textile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220309 Address after: Room 602, No. 88, Hangzhou Bay Avenue, Jinshan District, Shanghai 201500 Patentee after: SHANGHAI JUYOU CHEMICAL ENGINEER Co.,Ltd. Patentee after: Institute of Quartermaster engineering technology, Academy of systems engineering, Academy of Military Sciences Address before: GuoShouJing Rd., Pudong New Area Shanghai City, Shanghai City, No. 351, building 2, room 602X-4 Patentee before: SHANGHAI JUYOU CHEMICAL ENGINEER Co.,Ltd. |
|
| TR01 | Transfer of patent right |