CN111714922A - Emergency treatment device and hydrogen peroxide production device comprising same - Google Patents
Emergency treatment device and hydrogen peroxide production device comprising same Download PDFInfo
- Publication number
- CN111714922A CN111714922A CN201910224169.8A CN201910224169A CN111714922A CN 111714922 A CN111714922 A CN 111714922A CN 201910224169 A CN201910224169 A CN 201910224169A CN 111714922 A CN111714922 A CN 111714922A
- Authority
- CN
- China
- Prior art keywords
- storage chamber
- phase
- treatment device
- emergency treatment
- hydrogen peroxide
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
- C01B15/01—Hydrogen peroxide
- C01B15/022—Preparation from organic compounds
- C01B15/023—Preparation from organic compounds by the alkyl-anthraquinone process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention relates to the technical field of safety, and discloses an emergency treatment device and a hydrogen peroxide production device comprising the same. The emergency treatment device comprises a first storage chamber (2), a second storage chamber (3) and a separation assembly, wherein a drainage tube (1) is connected to the first storage chamber (2) to receive discharged liquid comprising a first phase and a second phase, the upper part of the first storage chamber (2) is opened, the second storage chamber (3) is closed, and a first phase in the first storage chamber (2) is discharged into the second storage chamber (3) through the separation assembly. Through above-mentioned technical scheme, introduce the discharge liquid in the first locker room through the drainage tube under open environment, a large amount of gas that produce when decomposing fast can diffuse rapidly, can avoid taking place phenomenons such as explosion, and discharge the first phase in the discharge liquid to the second locker room alone through the separable set to can recycle the first phase or concentrate on and handle the first phase.
Description
Technical Field
The invention relates to the technical field of safety, in particular to an emergency treatment device for a hydrogen peroxide production device and the hydrogen peroxide production device comprising the same.
Background
Hydrogen peroxide is one of the major basic chemical products in the world, and the aqueous solution of the hydrogen peroxide is suitable for medical wound disinfection, environmental disinfection and food disinfection, and can also be used as a photographic detergent, and the demand of the hydrogen peroxide is very large.
The anthraquinone process hydrogen peroxide production process is a main production method, and manufacturers at home and abroad research and improve individual technical links of the process, for example, aiming at the aspects of catalyst and working medium in the hydrogenation process, complete production process optimization and the like, the aim of the process is to mainly improve the hydrogen peroxide production capacity of unit volume of working solution. However, the inherent dangerousness in the production process always exists, especially in the extraction tower, a large amount of hydrogen peroxide solution exists, and if the control is not proper, hydrogen peroxide in the hydrogen peroxide is rapidly decomposed to generate excessive gas in a short time, so that serious safety accidents are easy to happen.
At present, the technology specially aiming at the process safety control is less, and the system safety control of the production process is incomplete. In the early stage of an accident or a precursor of the accident of the hydrogen peroxide production device, if the low-stability materials can be discharged in time, the malignant accident can be effectively prevented, so that a special emergency treatment device needs to be designed.
Therefore, the emergency treatment device for the hydrogen peroxide production and use device is needed to be provided for emergency discharge of a mixture containing hydrogen peroxide and organic materials.
Disclosure of Invention
The invention aims to provide an emergency treatment device for a hydrogen peroxide production and use device, which is used for emergency discharge of a mixture containing hydrogen peroxide and organic materials.
In order to accomplish the above object, an aspect of the present invention provides an emergency treatment apparatus including first and second storage chambers and a separation assembly, the first storage chamber having a drainage tube connected thereto to receive a discharged fluid including first and second phases, the first storage chamber having an open upper portion and the second storage chamber being closed, the first phase in the first storage chamber being discharged into the second storage chamber through the separation assembly.
Preferably, the separation assembly includes an oil suction pipe having one end located in the first phase in the first storage chamber and the other end located in the second storage chamber, and a suction pump provided on the oil suction pipe.
Preferably, the pipe density of the end of the oil suction pipe in the first phase in the first storage chamber is greater than the first phase density and less than the second phase density.
Preferably, the emergency treatment device further comprises a level meter disposed in the discharge liquid.
Preferably, the emergency treatment device further comprises a vent valve, a first valve port of the vent valve is connected with a first pipe for introducing nitrogen, and a second valve port of the vent valve is connected with the second storage chamber through a second pipe.
Preferably, the vent valve is a three-way valve, and a third pipe is connected to a third port of the vent valve.
Preferably, the vent valve is a self-standing regulator valve.
Preferably, a metal net is arranged on the bottom surface of the second storage room.
Preferably, the first storage room and the second storage room are formed in one body.
The hydrogen peroxide production device also comprises an emergency treatment device provided by the invention, and the emergency treatment device is respectively communicated with the extraction tower and the purification tower through the drainage tube.
Through above-mentioned technical scheme, introduce the discharge liquid in the first locker room through the drainage tube under open environment, a large amount of gas that produce when decomposing fast can diffuse rapidly, can avoid taking place phenomenons such as explosion, and discharge the first phase in the discharge liquid to the second locker room alone through the separable set to can recycle the first phase or concentrate on and handle the first phase.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an emergency treatment device provided by the present invention.
Description of the reference numerals
1 drainage tube 2 first storage room
3 second storage room 4 suction pump
5-vent valve 6-interface level meter
7 first pipe of metal mesh 8
9 oil suction pipe 10 second pipe
11 third pipe 12 accident pool
13 bulkhead
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, in the case where it is judged that the description for the related well-known function or structure may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted.
As shown in fig. 1, the emergency disposal apparatus of the present invention includes first and second storage chambers 2 and 3 and a separation assembly.
A draft tube 1 is connected to the first storage chamber 2 to receive the discharge liquid comprising the first phase and the second phase. In the following description, the hydrogen peroxide solution in the extraction tower of the hydrogen peroxide solution production apparatus is described as a discharge liquid, and in this case, the hydrogen peroxide solution includes an organic phase and an aqueous phase, wherein the first phase is an organic phase, the second phase is an aqueous phase, and the first phase and the second phase can be separated into layers, so that the first phase is located above the second phase, and the second phase is located below the first phase. This is shown for illustrative purposes only and the present invention is not limited thereto and the emergency treatment device of the present invention is preferably but not limited to use with effluent that rapidly generates large quantities of gas, which may include more phases or multiple phases that may not be stratified with respect to each other.
The upper portion of first locker room 2 opens the setting, and when hydrogen peroxide solution discharged to first locker room 2 through drainage tube 1 rapidly, a large amount of gases that hydrogen peroxide solution decomposes the production fast can diffuse to atmospheric environment fast to can avoid the emergence of explosion accident.
As shown in fig. 1, the first storage room 2 may be in the form of a pond having only side walls and a bottom wall, and the present invention is not limited to a specific form.
In addition, the second storage room 3 is provided as a closed space, and the first phase in the first storage room 2 is discharged into the second storage room 3 through the separation assembly, thereby preventing the first phase from being deteriorated by oxidation. The first phase in the discharged liquid is separately discharged into the second storage chamber through the separation assembly, so that the first phase can be recycled or treated in a centralized manner.
The second storage room 3 may be provided separately from the first storage room 2, but for the sake of compactness, in the present invention, as a preferred embodiment, as shown in fig. 1, the first storage room 2 and the second storage room 3 are formed as one body. Specifically, one partition wall 13 is provided in the middle of one accident pool to form two storage spaces, and a top wall is provided at the top of one storage space to form the first storage room 2 and the second storage room 3, and the first storage room 2 and the second storage room 3 are provided on one accident pool 12 to make the entire apparatus compact. However, the present invention is not limited thereto, and the first storage room and the second storage room may be separately provided according to specific requirements, for example, when the second storage room storing the first phase needs to be moved to another place, the separate second storage room may be provided on the mobile trailer for movement.
In addition, the capacity of the emergency treatment device of the invention can be designed according to the working conditions, and preferably, the sum of the volumes of the first storage chamber 2 and the second storage chamber 3 can be designed into the capacity of the device which needs to drain the accident substances. For example, in the case of the hydrogen peroxide production apparatus, since the gas explosion event may occur in the extraction tower and the purification tower, the sum of the volumes of the first storage chamber 2 and the second storage chamber 3 may be designed as the sum of the hydrogen peroxide stock volumes in the extraction tower and the purification tower. But the invention is not limited thereto.
The separating assembly is a component for separately discharging the first phase in the first storage chamber into the second storage chamber, and the specific structure may include a plurality of structures, for example, a separating door capable of moving up and down may be disposed on the partition wall 13, in an initial state, the separating door is in a closed state, after the discharged liquid in the first storage chamber 2 is stabilized, the first phase and the second phase are separated into layers, and then the separating door is controlled to move downwards slowly, so that the first phase located above in the first storage chamber 2 flows into the second storage chamber.
But as a more preferred embodiment, as shown in fig. 1, the separating assembly comprises an oil suction pipe 9 and a suction pump 4 provided on the oil suction pipe 9, one end of the oil suction pipe 9 being located in the first phase inside the first storage chamber 2 and the other end of the oil suction pipe 9 being located in the second storage chamber 3. The suction speed of the first phase can be controlled by the suction frequency of the suction pump 4.
Wherein, in order to make the oil suction pipe 9 always located in the first phase, it is preferable that the pipe density of the end of the oil suction pipe 9 located in the first phase inside the first storage chamber 2 is greater than the first phase density and less than the second phase density, thereby avoiding the second phase from being sucked into the second storage chamber.
On this basis, the emergency treatment device may further include a level gauge 6, and the level gauge 6 is disposed in the discharge liquid. Based on the stratification position fed back by the level gauge 6, it can be controlled whether the separation assembly continues to perform the suction. When the stratification disappears, or the liquid thickness of the first phase approaches 0, fed back from the level gauge 6, the separation assembly can be closed at this time to prevent the second phase from being sucked into the second storage chamber 3.
The above is a preferred embodiment of the first storage room 2. The following continues with a description of a preferred embodiment of the second storage room 3.
The organic phase sucked into the second storage chamber 3 may further contain undecomposed hydrogen peroxide, which may be decomposed in the second storage chamber 3 to generate oxygen, however, in order to avoid the organic phase reacting with the oxygen, the emergency treatment device provided by the present invention may further include a vent valve 5, a first valve port of the vent valve 5 is connected to a first pipe 8 for introducing nitrogen, and a second valve port of the vent valve 5 is connected to the second storage chamber 3 through a second pipe 10. Thereby, nitrogen gas is flushed into the second storage chamber 3.
In addition, the breather valve 5 is a three-way valve for discharging oxygen in the second storage chamber 3, and a third pipe 11 is connected to a third port of the breather valve 5. More preferably, the ventilation valve 5 is a self-supporting regulating valve, and the ventilation valve 5 can automatically adjust the opening degree according to the oxygen content in the second storage chamber 3, thereby ensuring the pressure balance inside the second storage chamber 3. When the oxygen content is higher than a certain value (for example, more than 10%), nitrogen can be introduced to replace the oxygen, and when the internal pressure of the second storage chamber is lower, nitrogen can also be introduced, and the processes can be automatically completed. It should be noted that the oxygen content in the second storage chamber 2 can be sampled manually or monitored online, and the invention is not limited in particular.
In addition, as a preferred embodiment, a metal net 7 may be disposed on the bottom surface of the second storage chamber 3 to accelerate the decomposition of the hydrogen peroxide solution that enters the second storage chamber 3 in a small amount. As the material of the metal mesh 7, stainless steel may be selected, and the shape of the metal mesh may be irregular, but the present invention is not limited thereto.
The hydrogen peroxide production device comprises an extraction tower and a purification tower, and further comprises the emergency treatment device, and the emergency treatment device is respectively communicated with the extraction tower and the purification tower through a drainage tube 1. When an accident occurs in the extraction tower and/or the purification tower of the hydrogen peroxide production device, the hydrogen peroxide can be quickly introduced into the emergency treatment device provided by the invention through the drainage tube, and as the hydrogen peroxide solution is in an open environment, a large amount of oxygen generated when the hydrogen peroxide is quickly decomposed can be quickly diffused, so that the phenomena of explosion and the like can be avoided, and the organic phase in the hydrogen peroxide solution is independently discharged into the second storage chamber through the separation component, so that the organic phase can be recycled or intensively treated.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (10)
1. An emergency treatment device, characterized in that the emergency treatment device comprises a first storage chamber (2) and a second storage chamber (3) and a separation assembly, a drainage tube (1) is connected to the first storage chamber (2) to receive a discharge liquid comprising a first phase and a second phase, the upper part of the first storage chamber (2) is open and the second storage chamber (3) is closed, the first phase in the first storage chamber (2) is discharged into the second storage chamber (3) through the separation assembly.
2. Emergency treatment device according to claim 1, characterized in that the separation assembly comprises an oil suction pipe (9) and a suction pump (4) arranged on the oil suction pipe (9), one end of the oil suction pipe (9) being located in the first phase inside the first storage chamber (2) and the other end of the oil suction pipe (9) being located in the second storage chamber (3).
3. Emergency treatment device according to claim 2, characterized in that the tubing density of the end of the oil suction pipe (9) located in the first phase inside the first storage chamber (2) is greater than the first phase density and less than the second phase density.
4. Emergency treatment device according to claim 2 or 3, characterized in that it further comprises a level meter (6), which level meter (6) is arranged in the effluent.
5. The emergency treatment device according to claim 1, further comprising a vent valve (5), a first valve port of the vent valve (5) being connected to a first pipe (8) for letting in nitrogen, a second valve port of the vent valve (5) being connected to the second storage chamber (3) through a second pipe (10).
6. Emergency treatment device according to claim 5, characterised in that the venting valve (5) is a three-way valve, to the third port of which venting valve (5) a third pipe (11) is connected.
7. Emergency treatment device according to claim 6, characterized in that the ventilation valve (5) is a self-standing regulating valve.
8. Emergency treatment device according to claim 1, characterised in that the second storage compartment (3) is provided on its bottom surface with a metal mesh (7).
9. Emergency treatment device according to claim 1, characterized in that the first storage chamber (2) and the second storage chamber (3) are formed in one piece.
10. A hydrogen peroxide solution apparatus for producing, hydrogen peroxide solution apparatus for producing includes extraction tower and purifying column, its characterized in that, hydrogen peroxide solution apparatus for producing still includes according to any one of claims 1 to 9 emergency treatment device, emergency treatment device pass through drainage tube (1) respectively with the extraction tower with the purifying column intercommunication.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910224169.8A CN111714922A (en) | 2019-03-22 | 2019-03-22 | Emergency treatment device and hydrogen peroxide production device comprising same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910224169.8A CN111714922A (en) | 2019-03-22 | 2019-03-22 | Emergency treatment device and hydrogen peroxide production device comprising same |
Publications (1)
Publication Number | Publication Date |
---|---|
CN111714922A true CN111714922A (en) | 2020-09-29 |
Family
ID=72563621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201910224169.8A Pending CN111714922A (en) | 2019-03-22 | 2019-03-22 | Emergency treatment device and hydrogen peroxide production device comprising same |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111714922A (en) |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100779894B1 (en) * | 2003-08-11 | 2007-11-28 | 데구사 게엠베하 | Process for the preparation of hydrogen peroxide by the anthraquinone cyclic process |
CN101955161A (en) * | 2010-10-15 | 2011-01-26 | 怀化市双阳林化有限公司 | Method for reducing discharge of oxidization raffinate |
CN103803500A (en) * | 2012-11-07 | 2014-05-21 | 中国石油化工股份有限公司 | Regeneration process of operating fluid for producing hydrogen peroxide by anthraquinone method |
WO2014096223A1 (en) * | 2012-12-20 | 2014-06-26 | Solvay Sa | A process for manufacturing a purified aqueous hydrogen peroxide solution |
CN104310317A (en) * | 2014-09-25 | 2015-01-28 | 中国石油化工股份有限公司 | Control method for preventing hydrogenation tail gas blast in anthraquinone method preparation of hydrogen peroxide |
CN105621364A (en) * | 2014-11-03 | 2016-06-01 | 中国石油化工股份有限公司 | High-efficiency extraction process in hydrogen peroxide production process |
CN205556091U (en) * | 2016-02-26 | 2016-09-07 | 云南新蓝色港科技发展有限公司 | Chlorine dioxide automatic control production system |
CN206616014U (en) * | 2017-03-02 | 2017-11-07 | 中触媒新材料股份有限公司 | A kind of hydrogenation apparatus of hydrogeneous anthraquinone working solution |
CN108892108A (en) * | 2018-09-03 | 2018-11-27 | 江山市双氧水有限公司 | A kind of process system of hydride storage tank involved in the dilute product process units of hydrogen peroxide |
CN208150968U (en) * | 2018-03-30 | 2018-11-27 | 湖南中天元环境工程有限公司 | A kind of reaction unit |
CN109205568A (en) * | 2017-06-30 | 2019-01-15 | 中国石油化工股份有限公司 | A method of purification hydrogen peroxide |
CN208485741U (en) * | 2018-05-09 | 2019-02-12 | 武汉新天达美环境科技股份有限公司 | A kind of high-efficiency wastewater treatment system with multifunctional disinfecting device |
-
2019
- 2019-03-22 CN CN201910224169.8A patent/CN111714922A/en active Pending
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100779894B1 (en) * | 2003-08-11 | 2007-11-28 | 데구사 게엠베하 | Process for the preparation of hydrogen peroxide by the anthraquinone cyclic process |
CN101955161A (en) * | 2010-10-15 | 2011-01-26 | 怀化市双阳林化有限公司 | Method for reducing discharge of oxidization raffinate |
CN103803500A (en) * | 2012-11-07 | 2014-05-21 | 中国石油化工股份有限公司 | Regeneration process of operating fluid for producing hydrogen peroxide by anthraquinone method |
WO2014096223A1 (en) * | 2012-12-20 | 2014-06-26 | Solvay Sa | A process for manufacturing a purified aqueous hydrogen peroxide solution |
CN104310317A (en) * | 2014-09-25 | 2015-01-28 | 中国石油化工股份有限公司 | Control method for preventing hydrogenation tail gas blast in anthraquinone method preparation of hydrogen peroxide |
CN105621364A (en) * | 2014-11-03 | 2016-06-01 | 中国石油化工股份有限公司 | High-efficiency extraction process in hydrogen peroxide production process |
CN205556091U (en) * | 2016-02-26 | 2016-09-07 | 云南新蓝色港科技发展有限公司 | Chlorine dioxide automatic control production system |
CN206616014U (en) * | 2017-03-02 | 2017-11-07 | 中触媒新材料股份有限公司 | A kind of hydrogenation apparatus of hydrogeneous anthraquinone working solution |
CN109205568A (en) * | 2017-06-30 | 2019-01-15 | 中国石油化工股份有限公司 | A method of purification hydrogen peroxide |
CN208150968U (en) * | 2018-03-30 | 2018-11-27 | 湖南中天元环境工程有限公司 | A kind of reaction unit |
CN208485741U (en) * | 2018-05-09 | 2019-02-12 | 武汉新天达美环境科技股份有限公司 | A kind of high-efficiency wastewater treatment system with multifunctional disinfecting device |
CN108892108A (en) * | 2018-09-03 | 2018-11-27 | 江山市双氧水有限公司 | A kind of process system of hydride storage tank involved in the dilute product process units of hydrogen peroxide |
Non-Patent Citations (5)
Title |
---|
杜三立: "《印刷工业化学药品手册》", 30 October 1980, 轻工业出版社 * |
梁凤凯: "《化工生产技术》", 31 August 2008, 天津大学出版社 * |
符德学: "《实用无机化工工艺学》", 30 September 1999, 西安交通大学出版社 * |
郑四仙: "关于蒽醌法双氧水生产安全控制的研究", 《化工管理》 * |
陈冠群: "蒽醌法生产双氧水的研究进展", 《化学工业与工程》 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2300273A1 (en) | DEVICE FOR PHOTO ACTIONS | |
EP3656743A1 (en) | Wastewater treatment system and method with catalysts | |
JP5639294B1 (en) | Chlorine dioxide generator using chlorine dioxide gas | |
CN111714922A (en) | Emergency treatment device and hydrogen peroxide production device comprising same | |
CN106430523B (en) | Organic wastewater bio-chemical effluent ozone advanced treatment apparatus and processing method | |
CN101880029B (en) | Continuous production device of composite chlorine dioxide and technology | |
CN204097234U (en) | A kind of organic wastewater with difficult degradation thereby treatment system | |
CN210103633U (en) | High concentration hydrazine class effluent treatment plant | |
CN107601645A (en) | A kind of catalyst oxidation reactor and its purification method for purifying waste water | |
JPH04504303A (en) | electrochemical cell | |
CN112960760B (en) | Preparation device and preparation method of hydroxyl radical and hydroxyl radical solution | |
CN112604321B (en) | Large-phase-ratio pre-dispersion micro-nano bubble supported liquid film extraction device | |
CN111217441A (en) | Ozone oxidation reactor and using method thereof | |
CN212532414U (en) | Catalytic ozonation integrated wastewater treatment device | |
EP3738674B1 (en) | System and methods for water processing | |
JP7351674B2 (en) | Multipurpose sewage treatment system | |
CN210544313U (en) | Chlorine gas treatment device | |
CN210974078U (en) | Biological aerated filter device for treating coal bed gas produced water | |
CN103011374A (en) | Sewage treatment method by using submersible relaying type liquid membrane catalysis oxidation small unit | |
CN201777880U (en) | Composite chlorine dioxide continuous production equipment | |
CN117534259B (en) | Micro-electrolysis-Fenton combined process chemical wastewater treatment device and treatment process | |
CN215592661U (en) | Treater, sewage aftertreatment device and self-cleaning intelligent toilet | |
CN210438572U (en) | Integrated sewage treatment equipment | |
CN216936048U (en) | Oxidation device for ammonia desulphurization solution | |
CN216073410U (en) | Industrial solid hazardous waste chloride ion removing device |
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 | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200929 |