CN103055804A - Compound water treatment agent as well as preparation method and application thereof - Google Patents

Compound water treatment agent as well as preparation method and application thereof Download PDF

Info

Publication number
CN103055804A
CN103055804A CN2013100177030A CN201310017703A CN103055804A CN 103055804 A CN103055804 A CN 103055804A CN 2013100177030 A CN2013100177030 A CN 2013100177030A CN 201310017703 A CN201310017703 A CN 201310017703A CN 103055804 A CN103055804 A CN 103055804A
Authority
CN
China
Prior art keywords
parts
disposal agent
composite water
water disposal
hydroxyapatite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2013100177030A
Other languages
Chinese (zh)
Other versions
CN103055804B (en
Inventor
祝建中
朱瑞瑞
季敏
陈龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hohai University HHU
Original Assignee
Hohai University HHU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hohai University HHU filed Critical Hohai University HHU
Priority to CN201310017703.0A priority Critical patent/CN103055804B/en
Publication of CN103055804A publication Critical patent/CN103055804A/en
Application granted granted Critical
Publication of CN103055804B publication Critical patent/CN103055804B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention provides a compound water treatment agent which is prepared from the following components in parts by weight: 0.1-5 parts of hydroxyapatite, 40-65 parts of natural zeolite, 1-10 parts of quartz, 1-10 parts of albite, 1-10 parts of illite, 10-40 parts of attapulgite and 0.1-5 parts of sepiolite. The invention further provides a preparation method and an application of the compound water treatment agent. The compound water treatment agent provided by the invention has the advantages of low cost, large specific surface area, high activity, high dispersity and high treatment efficiency.

Description

A kind of composite water disposal agent and preparation method thereof and application
Technical field
The invention belongs to water treatment field, particularly a kind of composite water disposal agent also relates to preparation method and the application of this composite water disposal agent.
Background technology
Current, water pollution problems has become one of main problem of China's urban environment.Whole nation river waters and lake generally are subject to pollution in various degree, and especially middle and lower reaches section in big and medium-sized cities is polluted more serious.Urban river is the important component part of China's water environment, because the discharging of people's industry waste water and city domestic sewage, the city rivers pollution situation is quite serious, and the ubiquity eutrophication problem.According to statistics, to early in the twentieth century, almost do not had in the world a complete natural river, the heavy damage of urban river and degeneration have been acknowledged as a global ecological environment problem.This shows that the reparation of water environment becomes the important content of China environmental protection.
Yet, the improvement difficult of municipal pollution water body, the improvement quantities is large, involves a wide range of knowledge.The existing main pollution control technology of municipal pollution water body has Physical, chemical method, bioanalysis etc.Physical is often cured the symptoms, not the disease, and all there is the shortcoming that has high input in watercourse aeration technology, Sediment Dredging technology etc., and do not have the ability of scale pollution treatment, and the final processing of the polluted bed mud that is eliminated in the Sediment Dredging also is a very stubborn problem; Chemical method mainly is to adopt various chemical agents, kills algae as adding chemical agent, adds the precipitation (the solid phosphorus of chemistry) of the promotion phosphorus such as molysite etc., though chemical method can make water quality temporarily improve, can cause secondary pollution; Bioanalysis is a kind of main body recovery technique with good development prospect, and control expense is low, and environment is without impact, pollution degradation to greatest extent, but have the difficult points such as screening, microbial growth control of high efficient strain, so that the bioanalysis recovery technique is difficult to promote.Therefore, in conjunction with the characteristics of urban water-body, be conceived to the reparation to water ecosystem and self-purification capacity, seeking a kind of novel sewage treatment agent with low cost, efficient becomes current major subjects.
Summary of the invention
Goal of the invention: the first purpose of the present invention provides the composite water disposal agent that a kind of cost is low, efficient is high.
The second purpose of the present invention provides the preparation method of this composite water disposal agent.
The 3rd purpose of the present invention provides the application of this composite water disposal agent.
Technical scheme: a kind of composite water disposal agent provided by the invention, made by the component of following weight portion: hydroxyapatite 0.1-5 part, natural zeolite 40-65 part, quartzy 1-10 part, albite 1-10 part, illite 1-10 part, attapulgite 10-40 part, sepiolite 0.1-5 part.
As preferably, made by the component of following weight portion: hydroxyapatite 2-4 part, natural zeolite 45-55 part, quartzy 4-6 part, albite 4-6 part, illite 4-6 part, attapulgite 20-30 part, sepiolite 2-4 part.
As further preferred, made by the component of following weight portion: 3 parts of hydroxyapatites, 50 parts of natural zeolites, 5 parts in quartz, 5 parts of albites, 5 parts of illites, 25 parts of attapulgites, 2.5 parts of sepiolites.
As further preferred, made by the component of following weight portion: 1 part of hydroxyapatite, 55 parts of natural zeolites, 5 parts in quartz, 5 parts of albites, 5 parts of illites, 28 parts of attapulgites, 2 parts of sepiolites.
Preferred as another kind, the particle diameter of described composite water disposal agent is 0.01-10 μ m.
The present invention also provides a kind of preparation method of composite water disposal agent, with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after the 250-350 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
The present invention also provides the application of composite water disposal agent in processing waste water, is specially: composite water disposal agent is added in the waste water, and constant temperature stirs, and filters after the sedimentation namely to get and processes rear water.
As preferably, the amount ratio of composite water disposal agent and waste water is (0.1-20) g:1L.
As further preferred, whipping temp is 20-30 ℃, and mixing time is 0.5-2h, and the sedimentation time is 20-30min.
Beneficial effect: composite water disposal agent provided by the invention is with low cost, specific area large, activity is high, dispersiveness is high, treatment effeciency is high, and it has following outstanding advantage with respect to prior art:
1. the raw material of composite water disposal agent of the present invention is natural sediment, and reserves are abundant, wide material sources, and cheap, operation cost is low, and easily regeneration can effectively reduce cost of water treatment; Environmentally safe can not cause secondary pollution yet simultaneously, and the composite water disposal agent of preparation is a kind of environmental friendliness shaped material.
2. composite water disposal agent of the present invention takes full advantage of the each component characteristic, such as zeolite and illitic adsorptivity and ion exchangeable, the adsorptivity of sepiolite, ion exchangeable and decolourising property etc.; Working in coordination of each component makes composite water disposal agent not only have simple suction-operated when processing simultaneously, also there are simultaneously skin effect, duct effect, structure effect, ion-exchange effect, crystallization effect, solubility effect, hydration effect and redox effect etc., each component is worked in coordination, Synergistic, nitrogen in effective removal waste water, phosphorus, heavy metal, organic dyestuff etc., than single nonmetallic mineral pollutants removal rate is improved 30-50% under the same terms, and remove pollutant speed and be exceedingly fast, it is short to reach the stable state time.
3. adopt ultrafine grinding process among the preparation method of composite water disposal agent of the present invention, make the size of prepared composite water disposal agent reach nanoscale, thereby make this composite water disposal agent possess the general character of nano material, have high specific area, high activity and polymolecularity.
Composite water disposal agent of the present invention treatment process when being applied to process waste water simple, have higher chemism and a biological stability, have wide range of applications, process the object diversification, can be used for the improvement of city polluted water body, also can be used for various engineering of water treatment projects, such as river course, sanitary sewage, soil remediation, industrial wastewater, dyeing waste water, paper waste processing, electroplating wastewater etc., have a extensive future.
The specific embodiment
According to following embodiment, the present invention may be better understood.Yet, those skilled in the art will readily understand that the described concrete material proportion of embodiment, process conditions and result thereof only are used for explanation the present invention, and should also can not limit the present invention described in detail in claims.
Embodiment 1
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 5 parts of hydroxyapatites, 65 parts of natural zeolites, 10 parts in quartz, 10 parts of albites, 10 parts of illites, 40 parts of attapulgites, 5 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 350 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 2
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 0.1 part of hydroxyapatite, 40 parts of natural zeolites, 1 part in quartz, 1 part of albite, 1 part of illite, 10 parts of attapulgites, 0.1 part of sepiolite.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 250 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 3
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 2 parts of hydroxyapatites, 45 parts of natural zeolites, 4 parts in quartz, 6 parts of albites, 6 parts of illites, 30 parts of attapulgites, 4 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 300 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 4
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 2 parts of hydroxyapatites, 55 parts of natural zeolites, 6 parts in quartz, 4 parts of albites, 4 parts of illites, 20 parts of attapulgites, 2 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 300 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 5
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 3 parts of hydroxyapatites, 50 parts of natural zeolites, 5 parts in quartz, 5 parts of albites, 5 parts of illites, 25 parts of attapulgites, 2.5 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 300 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 6
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 1 part of hydroxyapatite, 55 parts of natural zeolites, 5 parts in quartz, 5 parts of albites, 5 parts of illites, 28 parts of attapulgites, 2 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 300 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 7
The composite water disposal agent that embodiment 1 to 6 makes is processed waste water, may further comprise the steps: composite water disposal agent is added in the waste water, and 140r/min constant temperature stirs, water after 0.45 μ m membrane filtration namely gets and processes after the sedimentation.
Measure the pollutant levels of processing in the solution of front and back according to national standard method, calculate clearance, and carry out the check experiment of single nonmetallic ore under equal experimental condition, detection method is as follows:
TN:GB11894-89
TP:GB11893-89
BOD 5:GB7488-87
COD:GB11914-89
Cd 2+Pb 2+Zn 2+Cu 2+:GB7475-87
Cr 6+:GB7467-87,
Hg:GB7468-87
Turbidity: GB13200-91
Colourity: GB11903-89
Treatment conditions see Table 1, and treatment effect sees Table 2.
The composite water disposal agent that table 1 embodiment 1 to 6 makes is processed the waste water condition
Figure BDA00002746852100051
The composite water disposal agent that table 2 embodiment 1 to 6 makes is processed the waste water effect
Figure BDA00002746852100052
Can find out that by table 1 and table 2 composite water disposal agent of the present invention improves than zeolite greatly to the treatment effect of the various pollutants in the waste water.

Claims (9)

1. composite water disposal agent, it is characterized in that: the component by following weight portion is made: hydroxyapatite 0.1-5 part, natural zeolite 40-65 part, quartzy 1-10 part, albite 1-10 part, illite 1-10 part, attapulgite 10-40 part, sepiolite 0.1-5 part.
2. a kind of composite water disposal agent according to claim 1, it is characterized in that: the component by following weight portion is made: hydroxyapatite 2-4 part, natural zeolite 45-55 part, quartzy 4-6 part, albite 4-6 part, illite 4-6 part, attapulgite 20-30 part, sepiolite 2-4 part.
3. a kind of composite water disposal agent according to claim 1, it is characterized in that: the component by following weight portion is made: 3 parts of hydroxyapatites, 50 parts of natural zeolites, quartzy 5 parts, 5 parts of albites, 5 parts of illites, 25 parts of attapulgites, 2.5 parts of sepiolites.
4. a kind of composite water disposal agent according to claim 1, it is characterized in that: the component by following weight portion is made: 1 part of hydroxyapatite, 55 parts of natural zeolites, quartzy 5 parts, 5 parts of albites, 5 parts of illites, 28 parts of attapulgites, 2 parts of sepiolites.
5. a kind of composite water disposal agent according to claim 1, it is characterized in that: the particle diameter of described composite water disposal agent is 0.01-10 μ m.
6. the preparation method of a composite water disposal agent, it is characterized in that: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after the 250-350 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
7. the application of composite water disposal agent in processing waste water is characterized in that: composite water disposal agent is added in the waste water, and constant temperature stirs, and filters after the sedimentation namely to get and processes rear water.
8. application claimed in claim 7 is characterized in that: the amount ratio of composite water disposal agent and waste water is (0.1-20) g:1L.
9. application claimed in claim 7 is characterized in that: whipping temp is 20-30 ℃, and mixing time is 0.5-2h, and the sedimentation time is 20-30min.
CN201310017703.0A 2013-01-17 2013-01-17 Compound water treatment agent as well as preparation method and application thereof Active CN103055804B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310017703.0A CN103055804B (en) 2013-01-17 2013-01-17 Compound water treatment agent as well as preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310017703.0A CN103055804B (en) 2013-01-17 2013-01-17 Compound water treatment agent as well as preparation method and application thereof

Publications (2)

Publication Number Publication Date
CN103055804A true CN103055804A (en) 2013-04-24
CN103055804B CN103055804B (en) 2015-02-04

Family

ID=48098872

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310017703.0A Active CN103055804B (en) 2013-01-17 2013-01-17 Compound water treatment agent as well as preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN103055804B (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103708593A (en) * 2013-12-26 2014-04-09 张�成 Dyeing wastewater treatment agent and preparation method thereof
CN104276670A (en) * 2014-09-30 2015-01-14 希望环保(福建)有限公司 Sewage treating agent containing natural mineral substances and preparation method thereof
CN104845910A (en) * 2015-05-13 2015-08-19 河海大学 Biochemical reagent and preparation method and application thereof
CN105060374A (en) * 2015-09-28 2015-11-18 宁波高新区巴艺新材料科技有限公司 Treatment method of power plant circulating sewage
CN105084493A (en) * 2015-09-28 2015-11-25 宁波高新区巴艺新材料科技有限公司 Steel wastewater treatment method
CN105110441A (en) * 2015-09-30 2015-12-02 宁波保税区韬鸿化工科技有限公司 Water treatment agent and preparing method
CN105110395A (en) * 2015-09-30 2015-12-02 宁波保税区韬鸿化工科技有限公司 Water treatment agent and preparing method
CN105198056A (en) * 2015-09-30 2015-12-30 宁波保税区韬鸿化工科技有限公司 Paper making waste water treating agent and preparation method thereof
CN107473318A (en) * 2017-08-22 2017-12-15 承德人和矿业有限责任公司 One kind contains illitic mineral complex and preparation method and purposes
CN108465458A (en) * 2018-06-25 2018-08-31 黄益良 A kind of dye wastewater inorganic agent and preparation method thereof
CN108503387A (en) * 2017-02-24 2018-09-07 宁波清水坊环保科技有限公司 A kind of scale inhibition ball and preparation method thereof
CN108745317A (en) * 2018-06-19 2018-11-06 黄益良 A kind of Polymer sewage treatment agent and preparation method thereof
CN108793321A (en) * 2018-06-14 2018-11-13 崔凡 The water treatment agent of one heavy metal species and petroleum pollution
CN113522230A (en) * 2021-07-27 2021-10-22 桂林理工大学 Mineral adsorbent and preparation method and application thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314416A1 (en) * 2003-03-28 2004-11-04 Otto-Von-Guericke-Universität Magdeburg Separation of toxic heavy metal ions from waste waters, adsorbs them onto porous concrete adsorbents produced by calcining under given conditions
CN102173496A (en) * 2011-03-25 2011-09-07 中国科学院南京土壤研究所 Phosphorous removing agent for wastewater produced during producing organophosphorus pesticides and preparation method thereof
CN102527331A (en) * 2012-01-09 2012-07-04 上海海洋大学 Hydroxyapatite-modified zeolite composite material adsorbent, and preparation method and application thereof
CN102658082A (en) * 2012-04-25 2012-09-12 武汉理工大学 Inorganic composite material for absorbent refining multiple metal ion industrial sewage and application method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314416A1 (en) * 2003-03-28 2004-11-04 Otto-Von-Guericke-Universität Magdeburg Separation of toxic heavy metal ions from waste waters, adsorbs them onto porous concrete adsorbents produced by calcining under given conditions
CN102173496A (en) * 2011-03-25 2011-09-07 中国科学院南京土壤研究所 Phosphorous removing agent for wastewater produced during producing organophosphorus pesticides and preparation method thereof
CN102527331A (en) * 2012-01-09 2012-07-04 上海海洋大学 Hydroxyapatite-modified zeolite composite material adsorbent, and preparation method and application thereof
CN102658082A (en) * 2012-04-25 2012-09-12 武汉理工大学 Inorganic composite material for absorbent refining multiple metal ion industrial sewage and application method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
任海贝 等: "CPAM 二次改性有机膨润土的脱色性能研究", 《环境科学与技术》 *
郑水林: "非金属矿物材料的加工与应用", 《中国非金属矿工业导刊》 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103708593A (en) * 2013-12-26 2014-04-09 张�成 Dyeing wastewater treatment agent and preparation method thereof
CN103708593B (en) * 2013-12-26 2015-08-26 邯郸学院 A kind of dyeing and printing sewage treatment agent and preparation method thereof
CN104276670A (en) * 2014-09-30 2015-01-14 希望环保(福建)有限公司 Sewage treating agent containing natural mineral substances and preparation method thereof
CN104276670B (en) * 2014-09-30 2016-08-24 希望环保(福建)有限公司 A kind of sewage-treating agent containing natural mineral matter and preparation method
CN104845910A (en) * 2015-05-13 2015-08-19 河海大学 Biochemical reagent and preparation method and application thereof
CN105060374A (en) * 2015-09-28 2015-11-18 宁波高新区巴艺新材料科技有限公司 Treatment method of power plant circulating sewage
CN105084493A (en) * 2015-09-28 2015-11-25 宁波高新区巴艺新材料科技有限公司 Steel wastewater treatment method
CN105198056A (en) * 2015-09-30 2015-12-30 宁波保税区韬鸿化工科技有限公司 Paper making waste water treating agent and preparation method thereof
CN105110395A (en) * 2015-09-30 2015-12-02 宁波保税区韬鸿化工科技有限公司 Water treatment agent and preparing method
CN105110441A (en) * 2015-09-30 2015-12-02 宁波保税区韬鸿化工科技有限公司 Water treatment agent and preparing method
CN108503387A (en) * 2017-02-24 2018-09-07 宁波清水坊环保科技有限公司 A kind of scale inhibition ball and preparation method thereof
CN107473318A (en) * 2017-08-22 2017-12-15 承德人和矿业有限责任公司 One kind contains illitic mineral complex and preparation method and purposes
CN108793321A (en) * 2018-06-14 2018-11-13 崔凡 The water treatment agent of one heavy metal species and petroleum pollution
CN108745317A (en) * 2018-06-19 2018-11-06 黄益良 A kind of Polymer sewage treatment agent and preparation method thereof
CN108465458A (en) * 2018-06-25 2018-08-31 黄益良 A kind of dye wastewater inorganic agent and preparation method thereof
CN113522230A (en) * 2021-07-27 2021-10-22 桂林理工大学 Mineral adsorbent and preparation method and application thereof
CN113522230B (en) * 2021-07-27 2023-02-28 桂林理工大学 Mineral adsorbent and preparation method and application thereof

Also Published As

Publication number Publication date
CN103055804B (en) 2015-02-04

Similar Documents

Publication Publication Date Title
CN103055804B (en) Compound water treatment agent as well as preparation method and application thereof
Zou et al. Removal of cyanobacterial blooms in Taihu Lake using local soils II. Effective removal of Microcystis aeruginosa using local soils and sediments modified by chitosan
CN102718358B (en) Sewage treatment method
CN102674562A (en) Material and method for repairing polluted water and bottom mud
CN101186400A (en) Harmless treatment method for discarded slurry
CN104478055B (en) Sewage disposal complexing agent, its preparation method and methods for using them
CN100463868C (en) Ecological, environmental protective composite water treatment agent
Diver et al. The potential and constraints of replacing conventional chemical coagulants with natural plant extracts in water and wastewater treatment
CN102206022B (en) Physicochemical biological ecological method of system applied to sewage advanced treatment
CN107010690A (en) A kind of city domestic sewage dephosphorization agent and preparation method thereof
Chaudhary et al. Use of duckweed in wastewater treatment
Dkhissi et al. Valorization of Opuntia ficus-Indica pads and steel industry FeCl3-Rich rejection for removing surfactant and phenol from oil refinery wastewater through coagulation-flocculation
CN101497032A (en) Method for preparing biological sorbent and method of use thereof
CN104671634A (en) Iron inorganic flocculant sludge dewatering agent
CN105481184B (en) Food and drink waste water handles retracting device and method
CN107382028B (en) Sediment condensation reducing agent and preparation method and application thereof
CN1202022C (en) Ecological safety composite type iron system high-effective flocculating agent
CN105236535A (en) Compound flocculating agent and preparation method thereof
CN107324416A (en) Water Treatment agent
CN112520835A (en) Integrated remediation agent for black and odorous water body and bottom mud and preparation method
Ghaly et al. Carwash Wastewater Treatment and Reclamation Technologies for Water Conservation and Pollution Load Reduction: A Review
CN105060448A (en) Heavy-metal-containing sewage purifying agent and purifying method thereof
Tran et al. Dewatering of urban lake sediments using constructed wetlands: a case study in Hanoi, Vietnam
Muhamad Hanafi Landfill leachate treatment by combination of electro-fenton and sequencing batch reactor method
AS et al. Potential use of Water Hyacinth [Eichhornia crassipes (Mart.) Solms] in constructed wetlands for treatment of textile effluent in Common Effluent Treatment Plant

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