CN111036052A - Process method for treating indoor formaldehyde pollution - Google Patents
Process method for treating indoor formaldehyde pollution Download PDFInfo
- Publication number
- CN111036052A CN111036052A CN201911381805.4A CN201911381805A CN111036052A CN 111036052 A CN111036052 A CN 111036052A CN 201911381805 A CN201911381805 A CN 201911381805A CN 111036052 A CN111036052 A CN 111036052A
- Authority
- CN
- China
- Prior art keywords
- process method
- treating
- formaldehyde pollution
- activated carbon
- indoor formaldehyde
- 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
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
Abstract
The invention discloses a process method for treating indoor formaldehyde pollution. Specifically, spraying a penetrating decomposing agent on the surface of the indoor furniture board; increasing the temperature and humidity of the indoor space by using an electric heater and a humidifier; opening doors and windows, and ventilating; the step of the air purifier containing the activated carbon filter screen absorbing formaldehyde in indoor air is environment-friendly and efficient, and formaldehyde can be removed to a great extent in a short time.
Description
Technical Field
The invention belongs to the technical field of formaldehyde purification, and particularly relates to a process method for treating indoor formaldehyde pollution.
Background
In daily life, formaldehyde contained in indoor decoration materials, furniture and other plates has become one of the most serious pollutants in indoor air. The formaldehyde is released for a long time and is not easy to be removed in a short time. Formaldehyde is harmful to the human body in many ways, and is inhaled through the respiratory tract, mainly causing damage to the nervous system and the respiratory system.
The existing method for treating indoor formaldehyde pollution mainly comprises three methods of physical adsorption, photocatalysis and natural plant purification. The physical adsorption is mostly porous solid adsorption materials, such as activated carbon, activated alumina, diatomite and the like; most of the photocatalysis isN-type semiconductors, commonly predominantly made of TiO2CdS and ZnO2Etc. of which TiO2The photocatalyst has good stability, can be excited by ultraviolet light, has poor natural light source effect, can play a role in catalyzing and decomposing formaldehyde, but has weak decomposition capability, needs to rely on light and does not work at night; the efficiency of natural purification of plants is limited.
Therefore, it is the most urgent problem in the art to consider the advantages of various methods, treat the formaldehyde in the air as quickly as possible, and control the release of formaldehyde sources.
Disclosure of Invention
To solve the above problems, the present invention provides
The technical scheme adopted by the invention is as follows:
a process method for treating indoor formaldehyde pollution comprises the following steps:
1) the environment-friendly penetrating decomposing agent is uniformly sprayed on the surface of the indoor furniture board;
2) increasing the temperature and humidity of the indoor space by using an electric heater and a humidifier;
3) opening doors and windows, and ventilating;
4) an air purifier containing an active carbon filter screen absorbs formaldehyde in indoor air.
Specifically, the environment-friendly osmotic decomposition agent in the step 1) is chitosan quaternary ammonium salt, glycine or a combination of chitosan quaternary ammonium salt and glycine and one or two of sanchinin or tea polyphenol.
Specifically, the environment-friendly osmotic decomposition agent in the step 1) is dissolved in ethanol or deionized water.
Specifically, the step 2) is heated to over 35 ℃, the humidity reaches over 85 percent, and the door and window are sealed for 6 to 8 hours.
Specifically, the door and window are opened in the step 3), and ventilation is carried out for 6-8 hours.
Specifically, the doors and windows are closed in the step 3), and the air purifier is used for processing for 6-8 hours.
Specifically, the activated carbon in the step 4) is modified activated carbon.
Specifically, the step 2), the step 3) and the step 4) are carried out at any combination interval.
The invention also provides a preparation method for modifying the activated carbon, which comprises the following specific steps:
1) preparing a formaldehyde removing active agent, namely chitosan grafted amino acid polymer solution, adjusting the pH value to 8-9, and uniformly stirring;
2) putting activated carbon powder into the solution obtained in the step 1), stirring and soaking for 2 hours, filtering and drying to obtain the modified activated carbon.
The invention has the beneficial effects that:
according to the invention, the penetrating decomposition agent is firstly sprayed on the surface of the indoor furniture board, the chitosan quaternary ammonium salt, the glycine, the dencichine or the tea polyphenol can penetrate into the furniture and the board and can be captured and reacted with a source released by formaldehyde to generate a harmless substance, and the penetrating decomposition agent is natural substances extracted from plants, such as the dencichine and the tea polyphenol, so that the penetrating decomposition agent is more environment-friendly than a chemical reagent and can not cause secondary pollution; in addition, the active carbon in the air purifier is modified to increase the adsorption capacity of the gas and improve the formaldehyde removal efficiency, and the method is a combination of physical adsorption and chemical adsorption. And the formaldehyde can be removed to a large extent in a short time by combining the cyclic interval treatment of heating, humidification and ventilation.
Detailed Description
The invention is further illustrated by the following examples, without restricting the invention thereto. All changes, modifications and equivalents that do not depart from the spirit of the invention are intended to be included within the scope thereof.
Example 1 spray effectiveness test of penetrating decomposing agent
An experimental device is set up according to the national standard QB-T2761-2006 method for measuring the purification effect of indoor air purification products. Spraying various combinations of penetrating decomposing agents to 1 square meter of bare board capable of releasing formaldehyde in 10 square meter of blank chamber, standing for 24 hr, and detecting formaldehyde concentration in the blank chamber to be 1mg/m2And respectively spraying a concentrated penetrating decomposing agent in each blank cabin, and detecting the concentration of formaldehyde in the blank cabin after 24 hours.
TABLE 1 measurement of Formaldehyde removal Effect of penetrating decomposing agent
As can be seen from Table 1, the penetrating decomposer provided by the invention has a good removal rate for formaldehyde, wherein sanchinin and tea polyphenol cannot play an effective removal rate under the independent action, but the test effect is remarkably improved after the penetrating decomposer is combined with chitosan quaternary ammonium salt and glycine.
Example 2 activated carbon modification experiment
Preparing 200ml of formaldehyde-removing active agent solutions with the mass fractions of 2%, 5% and 10%, respectively, stirring, adjusting the pH value to 8-9, taking 35g of activated carbon powder, placing the activated carbon powder in the prepared solution, stirring, soaking for 2 hours, and then filtering and drying to obtain the modified activated carbon. Unmodified activated carbon and modified activated carbon were placed in a philips ACA-301 air cleaner, respectively, and tested.
The test was carried out using the same experimental apparatus as in example 1, and the air purifiers loaded with unmodified and modified activated carbon were placed in a blank chamber of 10 square meters for a 1 square meter bare board capable of releasing formaldehyde, respectively, and the formaldehyde concentration in the blank chamber was measured after 2 hours.
The activated carbon modified by the formaldehyde removing active agent with the mass concentration of 2.5%, 5% and 10% has improved functions compared with the unmodified activated carbon, and the functions are shown in the following table.
TABLE 2 results of formaldehyde removal efficiency of activated carbon modification experiments
Example 3 indoor Formaldehyde removal experiment
A process method for treating indoor formaldehyde pollution comprises the following steps:
1) collecting diet utensils and clothes, quilts and bedsheets in the owners;
2) closing the door and window, preparing a solution by using an osmotic decomposition agent formed by combining chitosan quaternary ammonium salt, glycine, dencichine and tea polyphenol with ethanol or water, and uniformly spraying the solution on the surface of the indoor furniture board;
3) increasing the temperature and humidity of the indoor space by using an electric heater and a humidifier, specifically heating to over 35 ℃ and the humidity to over 85%;
4) after keeping for 6-8 hours, opening the door and the window, and ventilating;
5) continuously increasing the temperature and humidity of the indoor space by using the electric heater and the humidifier, specifically heating to over 35 ℃ and the humidity to over 85%;
6) the air purifier containing the modified activated carbon filter screen absorbs formaldehyde in indoor air;
7) and after keeping for 6-8 hours, opening the door and the window, and ventilating.
Claims (9)
1. A process method for treating indoor formaldehyde pollution is characterized by comprising the following steps: the method comprises the following steps:
1) the environment-friendly penetrating decomposing agent is uniformly sprayed on the surface of the indoor furniture board;
2) increasing the temperature and humidity of the indoor space by using an electric heater and a humidifier;
3) opening doors and windows, and ventilating;
4) an air purifier containing an active carbon filter screen absorbs formaldehyde in indoor air.
2. The process method for treating indoor formaldehyde pollution according to claim 1, which is characterized in that: the environment-friendly penetrating decomposing agent in the step 1) is chitosan quaternary ammonium salt, glycine or the combination of chitosan quaternary ammonium salt and glycine and one or two of sanchinin or tea polyphenol.
3. The process method for treating indoor formaldehyde pollution according to claim 2, which is characterized in that: the environment-friendly osmotic decomposition agent in the step 1) is dissolved in ethanol or deionized water.
4. The process method for treating indoor formaldehyde pollution according to claim 1, which is characterized in that: and 2) heating to over 35 ℃, keeping the humidity over 85 percent, and sealing the door and window for 6-8 hours.
5. The process method for treating indoor formaldehyde pollution according to claim 1, which is characterized in that: and 3) opening doors and windows, and ventilating for 6-8 hours.
6. The process method for treating indoor formaldehyde pollution according to claim 1, which is characterized in that: and 3) closing the door and the window, and treating for 6-8 hours by using the air purifier.
7. The process method for treating indoor formaldehyde pollution according to claim 1, which is characterized in that: the activated carbon in the step 4) is modified activated carbon.
8. The process method for treating indoor formaldehyde pollution according to claim 1, which is characterized in that: step 2), step 3) and step 4) are carried out at any combination interval.
9. The process for treating indoor formaldehyde pollution according to claim 7, wherein the process comprises the following steps: the activated carbon is modified by the following steps:
1) preparing a formaldehyde removing active agent, namely chitosan grafted amino acid polymer solution, adjusting the pH value to 8-9, and uniformly stirring;
2) putting activated carbon powder into the solution obtained in the step 1), stirring and soaking for 2 hours, filtering and drying to obtain the modified activated carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911381805.4A CN111036052A (en) | 2019-12-27 | 2019-12-27 | Process method for treating indoor formaldehyde pollution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911381805.4A CN111036052A (en) | 2019-12-27 | 2019-12-27 | Process method for treating indoor formaldehyde pollution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111036052A true CN111036052A (en) | 2020-04-21 |
Family
ID=70239749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911381805.4A Pending CN111036052A (en) | 2019-12-27 | 2019-12-27 | Process method for treating indoor formaldehyde pollution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111036052A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111516086A (en) * | 2020-05-11 | 2020-08-11 | 嵊州亚坎空气净化设备有限公司 | Local formaldehyde remove device of sucking disc formula furniture |
| CN113019113A (en) * | 2021-03-12 | 2021-06-25 | 河南森泰克科技有限公司 | Device for quickly removing formaldehyde by using activated carbon and biological enzyme and using method thereof |
| CN115416123A (en) * | 2022-08-28 | 2022-12-02 | 石梦婷 | Processing method of environment-friendly furniture manufacturing board |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01121342A (en) * | 1987-11-06 | 1989-05-15 | Oji Paper Co Ltd | Immobilized lignin composite and use thereof |
| US20070113530A1 (en) * | 2005-11-17 | 2007-05-24 | Victor Morozov | Electrospray Neutralization Process and Apparatus for Generation of Nano-Aerosol and Nano-Structured Materials |
| CN103285820A (en) * | 2013-05-16 | 2013-09-11 | 马玉山 | Adsorbent for desorbing formaldehyde in air and preparation method thereof |
| CN107456841A (en) * | 2017-01-12 | 2017-12-12 | 伦慧东 | A kind of formaldehyde catching agent and the purification of air kit comprising the agent for capturing |
| CN107469270A (en) * | 2017-01-12 | 2017-12-15 | 伦慧东 | It is a kind of to purify and maintain room air construction method up to standard |
| CN108744913A (en) * | 2018-06-12 | 2018-11-06 | 林建军 | A kind of indoor decoration pollution comprehensive processing method |
| CN108939388A (en) * | 2018-06-22 | 2018-12-07 | 广州怡轩环保科技有限公司 | Aldehyde remover |
| CN109621697A (en) * | 2019-01-08 | 2019-04-16 | 安徽欧霖环保科技有限公司 | A method of removing indoor formaldehyde |
| CN109771882A (en) * | 2019-02-19 | 2019-05-21 | 生态美家(北京)环境科技有限公司 | Treating air indoor method |
| CN110270208A (en) * | 2019-03-01 | 2019-09-24 | 湖北格瑞乐环保工程有限公司 | A kind of detection of room air pollution and administering method |
| CN110280132A (en) * | 2019-07-22 | 2019-09-27 | 陈泽欣 | A kind of method for treating indoor air pollution |
| CN110403541A (en) * | 2019-06-28 | 2019-11-05 | 浙江维度环保科技有限公司 | A kind for the treatment of air indoor taste removal construction technology |
| CN110433624A (en) * | 2019-07-27 | 2019-11-12 | 国康(唐山)检测技术服务有限公司 | A kind of room temperature scavenging material and preparation method thereof for removing formaldehyde |
-
2019
- 2019-12-27 CN CN201911381805.4A patent/CN111036052A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01121342A (en) * | 1987-11-06 | 1989-05-15 | Oji Paper Co Ltd | Immobilized lignin composite and use thereof |
| US20070113530A1 (en) * | 2005-11-17 | 2007-05-24 | Victor Morozov | Electrospray Neutralization Process and Apparatus for Generation of Nano-Aerosol and Nano-Structured Materials |
| CN103285820A (en) * | 2013-05-16 | 2013-09-11 | 马玉山 | Adsorbent for desorbing formaldehyde in air and preparation method thereof |
| CN107456841A (en) * | 2017-01-12 | 2017-12-12 | 伦慧东 | A kind of formaldehyde catching agent and the purification of air kit comprising the agent for capturing |
| CN107469270A (en) * | 2017-01-12 | 2017-12-15 | 伦慧东 | It is a kind of to purify and maintain room air construction method up to standard |
| CN108744913A (en) * | 2018-06-12 | 2018-11-06 | 林建军 | A kind of indoor decoration pollution comprehensive processing method |
| CN108939388A (en) * | 2018-06-22 | 2018-12-07 | 广州怡轩环保科技有限公司 | Aldehyde remover |
| CN109621697A (en) * | 2019-01-08 | 2019-04-16 | 安徽欧霖环保科技有限公司 | A method of removing indoor formaldehyde |
| CN109771882A (en) * | 2019-02-19 | 2019-05-21 | 生态美家(北京)环境科技有限公司 | Treating air indoor method |
| CN110270208A (en) * | 2019-03-01 | 2019-09-24 | 湖北格瑞乐环保工程有限公司 | A kind of detection of room air pollution and administering method |
| CN110403541A (en) * | 2019-06-28 | 2019-11-05 | 浙江维度环保科技有限公司 | A kind for the treatment of air indoor taste removal construction technology |
| CN110280132A (en) * | 2019-07-22 | 2019-09-27 | 陈泽欣 | A kind of method for treating indoor air pollution |
| CN110433624A (en) * | 2019-07-27 | 2019-11-12 | 国康(唐山)检测技术服务有限公司 | A kind of room temperature scavenging material and preparation method thereof for removing formaldehyde |
Non-Patent Citations (3)
| Title |
|---|
| 全国勘察设计注册工程师环保专业管理委员会: "《注册环保工程师专业考试复习材料》", 31 March 2017, 北京：中国环境出版社 * |
| 史德: "《室内空气质量对人体健康的影响》", 31 May 2005, 北京：中国环境科学出版社 * |
| 张毅: "氨基酸改性壳聚糖基技术离子吸附剂材料的制备和性能", 《材料研究学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111516086A (en) * | 2020-05-11 | 2020-08-11 | 嵊州亚坎空气净化设备有限公司 | Local formaldehyde remove device of sucking disc formula furniture |
| CN113019113A (en) * | 2021-03-12 | 2021-06-25 | 河南森泰克科技有限公司 | Device for quickly removing formaldehyde by using activated carbon and biological enzyme and using method thereof |
| CN115416123A (en) * | 2022-08-28 | 2022-12-02 | 石梦婷 | Processing method of environment-friendly furniture manufacturing board |
| CN115416123B (en) * | 2022-08-28 | 2023-11-24 | 北京端瑞家具有限公司 | Environment-friendly furniture manufacturing plate processing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111036052A (en) | Process method for treating indoor formaldehyde pollution | |
| CN102151562B (en) | Method for preparing carbon fiber cloth material capable of effectively purifying air | |
| CN110860179B (en) | Formaldehyde scavenging agent and preparation method thereof | |
| CN109847527A (en) | A kind of wet tissue and preparation method thereof with except aldehyde function | |
| CN105174859A (en) | Diatomite micropowder-based interior wall paint capable of removing formaldehyde and peculiar smell in indoor air and preparation method thereof | |
| CN105688660B (en) | Using photocatalyst of titanium dioxide as material for air purification of base material and preparation method thereof | |
| CN108479721B (en) | Formaldehyde adsorption material and application thereof | |
| CN107983320B (en) | Preparation method of bifunctional film for removing formaldehyde, product and application thereof | |
| CN1680018A (en) | Methanal disintegrant and preparation thereof | |
| CN108854432A (en) | A kind of active carbon removing formaldehyde/bacteria cellulose compounded mix and preparation method | |
| CN107903666A (en) | A kind of filter material is with removing aldehyde mildew resistant paint and preparation method | |
| CN110560051A (en) | Titanium dioxide modified activated carbon supported silver monatomic catalyst and application thereof in formaldehyde oxidation | |
| CN113813940A (en) | Saturated activated carbon activation regeneration treatment process and control method | |
| CN108772038B (en) | Adsorbent for removing lead ions in water and preparation method and application thereof | |
| CN110538553A (en) | Preparation method of tourmaline-based negative ion air purification functional composite filter material | |
| CN116999598B (en) | Inorganic deodorant and preparation process thereof | |
| CN106009874A (en) | Nanometer negative ion function material for paint and preparing method thereof | |
| CN206215039U (en) | A kind of plasma light catalytic control equipment | |
| CN114713814A (en) | Preparation method of core-shell structure carbon-coated silver-zinc nano microsphere antibacterial material | |
| CN115870011A (en) | Nano-catalyst for efficiently degrading ammonia pollutants and application method thereof | |
| CN110743525A (en) | Nano bamboo charcoal for treating air pollution through photocatalysis and high activity | |
| CN113694673A (en) | Indoor air flow adjustable efficient purification method | |
| CN114225692B (en) | Filter material with functions of resisting bacteria, sterilizing and purifying VOCs and preparation method thereof | |
| CN111675520A (en) | Inorganic ecological wall material for purifying indoor air and preparation method thereof | |
| CN111792670A (en) | Titanium dioxide photocatalyst, preparation method thereof and application thereof in ceramic tiles |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201103 Address after: 430000 1-6 / F, building A6, Huazhong e-commerce Industrial Park, 206M plot, Wuhan Economic and Technological Development Zone, Wuhan, Hubei Province (zkcx-119) Applicant after: Wuhan yiherong New Material Co.,Ltd. Address before: 430000 room D2, floor 1-6, building D1 / D2, Huazhong e-commerce Industrial Park, plot 206M, Wuhan Economic and Technological Development Zone, Wuhan City, Hubei Province Applicant before: Wuhan Baolv Environmental Protection Technology Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200421 |
|
| RJ01 | Rejection of invention patent application after publication |