CN108236942A - A kind of mixed-metal oxides and its preparation for bisphenol-A of degrading - Google Patents
A kind of mixed-metal oxides and its preparation for bisphenol-A of degrading Download PDFInfo
- Publication number
- CN108236942A CN108236942A CN201611211564.5A CN201611211564A CN108236942A CN 108236942 A CN108236942 A CN 108236942A CN 201611211564 A CN201611211564 A CN 201611211564A CN 108236942 A CN108236942 A CN 108236942A
- Authority
- CN
- China
- Prior art keywords
- mixed
- solution
- metal oxides
- dissolved
- bisphenol
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/26—Chromium
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Catalysts (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention discloses a kind of mixed-metal oxides for bisphenol-A of degrading and its preparations, are prepared by the following method：It weighs zinc nitrate and chromic nitrate is dissolved in deionized water, stir to solid and be completely dissolved, obtain clear blackish green mixed salt solution, be denoted as solution A；It weighs sodium hydroxide and sodium carbonate is dissolved in deionized water, stir to solid and be completely dissolved, be made into mixed ammonium/alkali solutions, be denoted as solution B；B solution is added dropwise in the solution A being stirred continuously, until solution ph 8.5 9.5；After being added dropwise to complete, suspension is continued to stir, is then placed in aging in thermostat water bath, be cooled to room temperature deionized waters and absolute ethyl alcohol alternately rinses, products therefrom is ground up, sieved, high-temperature calcination is up to mixed-metal oxides in vacuum drying.Mixed-metal oxides provided by the invention can be with catalytic degradation bisphenol-A.
Description
Technical field
The invention belongs to Material Fields, and in particular to a kind of mixed-metal oxides and its preparation for bisphenol-A of degrading.
Background technology
In recent years, bisphenol-A is widely used in polycarbonate plastic, ring as a kind of important Organic Chemicals
In the compound probability of oxygen resin, wherein, including a variety of common plastic products, such as feeding bottle, diet packaging, disk, toy, medical treatment
Articles for use etc..According to statistics, the whole world has 360~6,800,000 tons of bisphenol-As to be used for producing various plastic products every year, and bisphenol-A is in itself
The slightly solubility that has, refractory organics and endocrine disrupting, make it be widely present in as a kind of typical incretion interferent
In nature.Research shows that bisphenol-A can not only damage the liver of humans and animals, it can also cause angiocardiopathy, thyroid hormone
Disorderly, Sex Differentiation is abnormal, obesity etc..It is accumulation, irreversible, duration to the harm of human body.Therefore,
The technical method for seeking the solution bisphenol-A pollution problem of economical and efficient is of great immediate significance.
Currently, high-level oxidation technology relies on its high reaction activity, can be particularly micro- by organic pollution materials in a short time
The substance of amount and persistence difficult for biological degradation is converted to the small-molecule substance of easily biological-degradable, in the processing of such waste water gradually
It play an important role.Wherein, photocatalysis technology is a new and effective, economic, environmentally friendly oxidation technology, and as key problem in technology
Photochemical catalyst become research emphasis in recent years.
Applicant is intended to provide a kind of mixed-metal oxides for having photocatalytic activity, can be used for degradation bisphenol-A.
Invention content
The object of the present invention is to provide a kind of mixed-metal oxides for bisphenol-A of degrading and its preparations.
Above-mentioned purpose is achieved by the following technical solution：
A kind of mixed-metal oxides for bisphenol-A of degrading are prepared by the following method：It weighs zinc nitrate and chromic nitrate is molten
It in deionized water, stirs to solid and is completely dissolved, obtain clear blackish green mixed salt solution, be denoted as solution A；It weighs
Sodium hydroxide and sodium carbonate are dissolved in deionized water, are stirred to solid and are completely dissolved, and are made into mixed ammonium/alkali solutions, are denoted as solution B；It will
B solution is added dropwise in the solution A being stirred continuously, until solution ph 8.5-9.5；After being added dropwise to complete, suspension is continued
Stirring, is then placed in aging in thermostat water bath, is cooled to room temperature deionized waters and absolute ethyl alcohol alternately rinses, gained production
Object is ground up, sieved, high-temperature calcination is up to mixed-metal oxides in vacuum drying.
Further, zinc nitrate and chromic nitrate molar ratio are 1:2-3.
Further, zinc nitrate molar concentration is 0.6-1.0mol/L.
Further, the molar ratio of the sodium hydroxide and the sodium carbonate is 1:2-3.
Further, sodium hydroxide molar concentration is 1-2mol/L.
Further, aging temperature is 70-80 DEG C in thermostat water bath, and ageing time is 2-4 hours.
Further, the temperature of high-temperature calcination is 550-750 DEG C, and calcination time is 3-5 hours.
Beneficial effects of the present invention：
Mixed-metal oxides provided by the invention can be with catalytic degradation bisphenol-A.
Specific embodiment
Intend specifically introducing the technical solution of the invention below by specific embodiment.
Embodiment 1：
A kind of mixed-metal oxides for bisphenol-A of degrading are prepared by the following method：It weighs zinc nitrate and chromic nitrate is molten
It in deionized water, stirs to solid and is completely dissolved, obtain clear blackish green mixed salt solution, be denoted as solution A；It weighs
Sodium hydroxide and sodium carbonate are dissolved in deionized water, are stirred to solid and are completely dissolved, and are made into mixed ammonium/alkali solutions, are denoted as solution B；It will
B solution is added dropwise in the solution A being stirred continuously, until solution ph 9；After being added dropwise to complete, suspension is continued to stir, so
After be put into aging in thermostat water bath, be cooled to room temperature deionized waters and absolute ethyl alcohol and alternately rinse, products therefrom is in vacuum
It is dry, it is ground up, sieved, high-temperature calcination is up to mixed-metal oxides.
Wherein, zinc nitrate and chromic nitrate molar ratio are 1:2.5；Zinc nitrate molar concentration is 0.8mol/L.
Wherein, the molar ratio of the sodium hydroxide and the sodium carbonate is 1:2.5；Sodium hydroxide molar concentration is
1.5mol/L。
Wherein, aging temperature is 75 DEG C in thermostat water bath, and ageing time is 3 hours.
Wherein, the temperature of high-temperature calcination is 650 DEG C, and calcination time is 4 hours.
Embodiment 2：
A kind of mixed-metal oxides for bisphenol-A of degrading are prepared by the following method：It weighs zinc nitrate and chromic nitrate is molten
It in deionized water, stirs to solid and is completely dissolved, obtain clear blackish green mixed salt solution, be denoted as solution A；It weighs
Sodium hydroxide and sodium carbonate are dissolved in deionized water, are stirred to solid and are completely dissolved, and are made into mixed ammonium/alkali solutions, are denoted as solution B；It will
B solution is added dropwise in the solution A being stirred continuously, until solution ph 8.5；After being added dropwise to complete, suspension is continued to stir,
Aging in thermostat water bath is then placed in, deionized waters is cooled to room temperature and absolute ethyl alcohol alternately rinses, products therefrom is in true
Sky is dry, is ground up, sieved, high-temperature calcination is up to mixed-metal oxides.
Wherein, zinc nitrate and chromic nitrate molar ratio are 1:2；Zinc nitrate molar concentration is 0.6mol/L.
Wherein, the molar ratio of the sodium hydroxide and the sodium carbonate is 1:2；Sodium hydroxide molar concentration is 1mol/L.
Wherein, aging temperature is 70 DEG C in thermostat water bath, and ageing time is 4 hours.
Wherein, the temperature of high-temperature calcination is 550 DEG C, and calcination time is 5 hours.
Embodiment 3：
A kind of mixed-metal oxides for bisphenol-A of degrading are prepared by the following method：It weighs zinc nitrate and chromic nitrate is molten
It in deionized water, stirs to solid and is completely dissolved, obtain clear blackish green mixed salt solution, be denoted as solution A；It weighs
Sodium hydroxide and sodium carbonate are dissolved in deionized water, are stirred to solid and are completely dissolved, and are made into mixed ammonium/alkali solutions, are denoted as solution B；It will
B solution is added dropwise in the solution A being stirred continuously, until solution ph 9.5；After being added dropwise to complete, suspension is continued to stir,
Aging in thermostat water bath is then placed in, deionized waters is cooled to room temperature and absolute ethyl alcohol alternately rinses, products therefrom is in true
Sky is dry, is ground up, sieved, high-temperature calcination is up to mixed-metal oxides.
Wherein, zinc nitrate and chromic nitrate molar ratio are 1:3；Zinc nitrate molar concentration is 1.0mol/L.
Wherein, the molar ratio of the sodium hydroxide and the sodium carbonate is 1:3；Sodium hydroxide molar concentration is 2mol/L.
Wherein, aging temperature is 80 DEG C in thermostat water bath, and ageing time is 2 hours.
Wherein, the temperature of high-temperature calcination is 750 DEG C, and calcination time is 3 hours.
Embodiment 4：
A kind of mixed-metal oxides for bisphenol-A of degrading are prepared by the following method：It weighs zinc nitrate and chromic nitrate is molten
It in deionized water, stirs to solid and is completely dissolved, obtain clear blackish green mixed salt solution, be denoted as solution A；It weighs
Sodium hydroxide and sodium carbonate are dissolved in deionized water, are stirred to solid and are completely dissolved, and are made into mixed ammonium/alkali solutions, are denoted as solution B；It will
B solution is added dropwise in the solution A being stirred continuously, until solution ph 9；After being added dropwise to complete, suspension is continued to stir, so
After be put into aging in thermostat water bath, be cooled to room temperature deionized waters and absolute ethyl alcohol and alternately rinse, products therefrom is in vacuum
It is dry, it is ground up, sieved, high-temperature calcination is up to mixed-metal oxides.
Wherein, zinc nitrate and chromic nitrate molar ratio are 1:2.5；Zinc nitrate molar concentration is 0.8mol/L.
Wherein, the molar ratio of the sodium hydroxide and the sodium carbonate is 1:2.5；Sodium hydroxide molar concentration is
1.5mol/L。
Wherein, aging temperature is 75 DEG C in thermostat water bath, and ageing time is 3 hours.
Wherein, the temperature of high-temperature calcination is 600 DEG C, and calcination time is 4 hours.
Embodiment 5：
A kind of mixed-metal oxides for bisphenol-A of degrading are prepared by the following method：It weighs zinc nitrate and chromic nitrate is molten
It in deionized water, stirs to solid and is completely dissolved, obtain clear blackish green mixed salt solution, be denoted as solution A；It weighs
Sodium hydroxide and sodium carbonate are dissolved in deionized water, are stirred to solid and are completely dissolved, and are made into mixed ammonium/alkali solutions, are denoted as solution B；It will
B solution is added dropwise in the solution A being stirred continuously, until solution ph 9；After being added dropwise to complete, suspension is continued to stir, so
After be put into aging in thermostat water bath, be cooled to room temperature deionized waters and absolute ethyl alcohol and alternately rinse, products therefrom is in vacuum
It is dry, it is ground up, sieved, high-temperature calcination is up to mixed-metal oxides.
Wherein, zinc nitrate and chromic nitrate molar ratio are 1:2.5；Zinc nitrate molar concentration is 0.8mol/L.
Wherein, the molar ratio of the sodium hydroxide and the sodium carbonate is 1:2.5；Sodium hydroxide molar concentration is
1.5mol/L。
Wherein, aging temperature is 75 DEG C in thermostat water bath, and ageing time is 3 hours.
Wherein, the temperature of high-temperature calcination is 700 DEG C, and calcination time is 4 hours.
Embodiment 6：
A kind of mixed-metal oxides for bisphenol-A of degrading are prepared by the following method：It weighs zinc nitrate and chromic nitrate is molten
It in deionized water, stirs to solid and is completely dissolved, obtain clear blackish green mixed salt solution, be denoted as solution A；It weighs
Sodium hydroxide and sodium carbonate are dissolved in deionized water, are stirred to solid and are completely dissolved, and are made into mixed ammonium/alkali solutions, are denoted as solution B；It will
B solution is added dropwise in the solution A being stirred continuously, until solution ph 9；After being added dropwise to complete, suspension is continued to stir, so
After be put into aging in thermostat water bath, be cooled to room temperature deionized waters and absolute ethyl alcohol and alternately rinse, products therefrom is in vacuum
It is dry, it is ground up, sieved, high-temperature calcination is up to mixed-metal oxides.
Wherein, zinc nitrate and chromic nitrate molar ratio are 1:2.5；Zinc nitrate molar concentration is 0.7mol/L.
Wherein, the molar ratio of the sodium hydroxide and the sodium carbonate is 1:2.5；Sodium hydroxide molar concentration is
1.5mol/L。
Wherein, aging temperature is 75 DEG C in thermostat water bath, and ageing time is 3 hours.
Wherein, the temperature of high-temperature calcination is 650 DEG C, and calcination time is 4 hours.
Embodiment 7：
A kind of mixed-metal oxides for bisphenol-A of degrading are prepared by the following method：It weighs zinc nitrate and chromic nitrate is molten
It in deionized water, stirs to solid and is completely dissolved, obtain clear blackish green mixed salt solution, be denoted as solution A；It weighs
Sodium hydroxide and sodium carbonate are dissolved in deionized water, are stirred to solid and are completely dissolved, and are made into mixed ammonium/alkali solutions, are denoted as solution B；It will
B solution is added dropwise in the solution A being stirred continuously, until solution ph 9；After being added dropwise to complete, suspension is continued to stir, so
After be put into aging in thermostat water bath, be cooled to room temperature deionized waters and absolute ethyl alcohol and alternately rinse, products therefrom is in vacuum
It is dry, it is ground up, sieved, high-temperature calcination is up to mixed-metal oxides.
Wherein, zinc nitrate and chromic nitrate molar ratio are 1:2.5；Zinc nitrate molar concentration is 0.9mol/L.
Wherein, the molar ratio of the sodium hydroxide and the sodium carbonate is 1:2.5；Sodium hydroxide molar concentration is
1.5mol/L。
Wherein, aging temperature is 75 DEG C in thermostat water bath, and ageing time is 3 hours.
Wherein, the temperature of high-temperature calcination is 650 DEG C, and calcination time is 4 hours.
Mixed-metal oxides provided by the invention can be with catalytic degradation bisphenol-A.
The effect of above-mentioned specific embodiment indicates that the essentiality content of the invention, but do not limit this hair with this
The protection domain of bright creation.Simply modification or equivalent replacement are carried out to the technical solution of the invention, without departing from this hair
It is bright to create the essence of technical solution, thus necessarily fall into the protection domain of the invention.
Claims (7)
1. a kind of mixed-metal oxides for bisphenol-A of degrading, which is characterized in that be prepared by the following method：Weigh nitre
Sour zinc and chromic nitrate are dissolved in deionized water, are stirred to solid and are completely dissolved, and obtain clear blackish green mixed salt solution,
It is denoted as solution A；It weighs sodium hydroxide and sodium carbonate is dissolved in deionized water, stir to solid and be completely dissolved, be made into mixing alkali soluble
Liquid is denoted as solution B；B solution is added dropwise in the solution A being stirred continuously, until solution ph 8.5-9.5；It is added dropwise to complete
Afterwards, suspension is continued to stir, is then placed in aging in thermostat water bath, be cooled to room temperature deionized waters and absolute ethyl alcohol
It alternately rinses, products therefrom is ground up, sieved, high-temperature calcination is up to mixed-metal oxides in vacuum drying.
2. mixed-metal oxides according to claim 1, it is characterised in that：Zinc nitrate and chromic nitrate molar ratio are 1:2-
3。
3. mixed-metal oxides according to claim 2, it is characterised in that：Zinc nitrate molar concentration is 0.6-
1.0mol/L。
4. mixed-metal oxides according to claim 1, it is characterised in that：The sodium hydroxide and the sodium carbonate
Molar ratio is 1:2-3.
5. mixed-metal oxides according to claim 4, it is characterised in that：Sodium hydroxide molar concentration is 1-2mol/
L。
6. mixed-metal oxides according to claim 1, it is characterised in that：Aging temperature is 70- in thermostat water bath
80 DEG C, ageing time is 2-4 hours.
7. mixed-metal oxides according to claim 1, it is characterised in that：The temperature of high-temperature calcination is 550-750 DEG C,
Calcination time is 3-5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611211564.5A CN108236942A (en) | 2016-12-25 | 2016-12-25 | A kind of mixed-metal oxides and its preparation for bisphenol-A of degrading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611211564.5A CN108236942A (en) | 2016-12-25 | 2016-12-25 | A kind of mixed-metal oxides and its preparation for bisphenol-A of degrading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108236942A true CN108236942A (en) | 2018-07-03 |
Family
ID=62703748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611211564.5A Pending CN108236942A (en) | 2016-12-25 | 2016-12-25 | A kind of mixed-metal oxides and its preparation for bisphenol-A of degrading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108236942A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611543A (en) * | 2013-11-28 | 2014-03-05 | 沈阳化工大学 | Method for preparing ZnFeCr hydrotalcite photocatalyst |
| CN105289578A (en) * | 2015-11-24 | 2016-02-03 | 华南理工大学 | Metal oxide/carbon nanotube composite photocatalyst, and preparation method and application thereof |
-
2016
- 2016-12-25 CN CN201611211564.5A patent/CN108236942A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611543A (en) * | 2013-11-28 | 2014-03-05 | 沈阳化工大学 | Method for preparing ZnFeCr hydrotalcite photocatalyst |
| CN105289578A (en) * | 2015-11-24 | 2016-02-03 | 华南理工大学 | Metal oxide/carbon nanotube composite photocatalyst, and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| 严彬彬: "Zn-Mn-Al层状水滑石基复合氧化物光催化还原二氧化碳", 《湖南理工学院学报》 * |
| 黄婷等: "层状双金属氢氧化物及其在水处理中的应用", 《能源与环境》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102824884B (en) | A kind of TiO 2/ Fe 2o 3compound hollow microballoon and preparation method thereof | |
| CN103623847B (en) | A kind of CdSe-Bi 2wO 6the preparation method of photochemical catalyst | |
| CN101928034A (en) | A kind of method for preparing cuprous chloride | |
| CN108043447A (en) | A kind of photochemical catalyst preparation method and application | |
| CN105948218A (en) | Method for treating antibiotic wastewater by using ordered mesopore Co3O4 to activate peroxymonosulfate | |
| CN108314172A (en) | A kind of biodegrading process of organic pollution | |
| CN103241775B (en) | Preparation method of Fe2O3/BiOCl nano-composite powder | |
| CN105417830B (en) | A kind of method of photoactivation oxidized organic wastewater production organic carbon fertilizer | |
| CN103736504B (en) | The preparation of metal ion mixing CdSe quantum dot photochemical catalyst and application thereof | |
| CN103962122A (en) | Preparation method of pucherite composite titanium dioxide | |
| CN108236942A (en) | A kind of mixed-metal oxides and its preparation for bisphenol-A of degrading | |
| CN105272556A (en) | Aquaculture biofertilizer and preparation method thereof | |
| CN109748877A (en) | A kind of preparation method of 5-acetoacetamido benzimidazolone | |
| CN103599799B (en) | The preparation method of CdSeCdS nuclear shell structure quantum point photochemical catalyst and application thereof | |
| CN107213888A (en) | It is a kind of that there is good visible light-responded two-dimentional Bi12TiO20The preparation method of nanometer sheet | |
| CN111545200A (en) | Ce-Ag-TiO2Nano composite antibacterial material and preparation method thereof | |
| CN104801311A (en) | MoO3/NiO/TiO2 solid acid catalyst and preparation method thereof | |
| CN106378172A (en) | Preparation method and application of vanadium and nitrogen co-doped titanium dioxide dispersion liquid | |
| CN109077064A (en) | A kind of GQDs/TiO2/ CuO composite antibacterial material and the preparation method and application thereof | |
| CN103708881B (en) | A kind of active sludge fertilizer | |
| CN104789223A (en) | Novel method for preparing fluorescence LaVO4:Eu nanoflower and application thereof | |
| CN108404943A (en) | A kind of synthetic method of the Photodegradation catalyst of rare earth/iodine codope | |
| CN104437468A (en) | Catalyst composition for treating wastewater containing methylene blue dye as well as preparation method and application of catalyst composition | |
| CN106083913A (en) | A kind of organo-tin compound and synthetic method thereof | |
| CN112657514A (en) | Photocatalyst filled with porous nano ZnS @ ZnO hollow spheres and preparation method thereof |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180703 |
|
| WD01 | Invention patent application deemed withdrawn after publication |