CN108101139A - A kind of water hyacinth biomass uranium extraction method - Google Patents

A kind of water hyacinth biomass uranium extraction method Download PDF

Info

Publication number
CN108101139A
CN108101139A CN201710938371.8A CN201710938371A CN108101139A CN 108101139 A CN108101139 A CN 108101139A CN 201710938371 A CN201710938371 A CN 201710938371A CN 108101139 A CN108101139 A CN 108101139A
Authority
CN
China
Prior art keywords
uranium
biomass
water hyacinth
water
extraction method
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
Application number
CN201710938371.8A
Other languages
Chinese (zh)
Inventor
黄德娟
任强
郭正远
黄德超
陈睿
黎武元
李天文
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.)
East China Institute of Technology
Original Assignee
East China Institute of Technology
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 East China Institute of Technology filed Critical East China Institute of Technology
Priority to CN201710938371.8A priority Critical patent/CN108101139A/en
Publication of CN108101139A publication Critical patent/CN108101139A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M1/00—Apparatus for enzymology or microbiology
    • C12M1/107—Apparatus for enzymology or microbiology with means for collecting fermentation gases, e.g. methane
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • G21F9/12—Processing by absorption; by adsorption; by ion-exchange
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • G21F9/14—Processing by incineration; by calcination, e.g. desiccation
    • 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
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
    • B01J2220/4843—Algae, aquatic plants or sea vegetals, e.g. seeweeds, eelgrass
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F2101/006—Radioactive compounds
    • 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
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

It is exactly to put into a large amount of water hyacinth biomass in Uranium tailings liquid that water hyacinth biomass, which adopts uranium, after uranium in water by biomass absorbent to a certain extent after, Uranium tailings liquid is filtered, obtained rich uranium biomass carries out biogas fermentation processing, the residue of fermentation bakes biogas residue cake, through high temperature incineration, uranium-bearing biology ore is formed.It is concretely comprised the following steps：（1）Produce water hyacinth biomass；（2）PH adjustings, stirring and adsorbing processing are carried out to Uranium tailings liquid；（3）After uranium is adsorbed to a certain degree, filtering, obtained filter residue carries out biogas fermentation；（4）Fermentation residues are dried, and high temperature incineration processing, it is uranium-bearing biology ore to leave ash content.The advantages that present invention has rate of recovery height, easy to operate, of low cost, energy conservation and environmental protection.

Description

A kind of water hyacinth biomass uranium extraction method
Technical field
The present invention provides a kind of method that uranium is gathered in liquid from Uranium tailings, using in water hyacinth biomass absorbent water body Uranium, then by gained uranium-bearing biomass carry out biogas fermentation, fermentation residues carry out drying and processing after through high temperature incineration formed uranium-bearing Biological ore.Present patent application request Application No. 2017103377111, entitled " a kind of dry powder of water hyacinth adsorbent and suction The priority of the patent application of attached uranium and aftertreatment technology ".
Background technology
Uranium mining process treatment process is various, and wastewater flow rate is big.The traditional handicraft of hydrometallurgy of uranium is ore acquisition, broken leaching Go out, extract concentration, hydrometallurgy product obtains yellow cake under high temperature drying, chemically treated to change into hex, a series of at this Production process in can generate various concentration, the uranium-containing waste water of different acid or alkali environment.Pollution has following several respects caused by waste water: (1) uranium-containing waste water in acid erosion environment, destroy acid-base balance, accelerate ion mobility in waste water；(2) weight Metallic pollution is often arranged containing heavy metal element Cd, Cu, Hg, Mo, Pb etc. in recovery process with smelting wastewater in uranium ore mineral deposit It is put into environment；(3) radioactive element contained in waste water causes radioactive pollution to environment.Uranium in uranium-containing waste water was both Chemical toxicity with heavy metal element, and have the distinctive radiation hazradial bundle of radionuclide, while can be quick under sour environment The main reason for migration is contaminated wastewater natural environment.It is eventually entered into after uranium pollution environment by biological concentration and food chain transmission Human body jeopardizes human health.Uranium is mainly metabolized in human body by kidney, therefore compromised kidneys are the most serious.In human body Interior, uranium not only shows the chemical toxicity of its heavy metal element, its radiation performance directly acts on the amino acid of body, nucleic acid Etc. important components change its structure and induce the change of a series of physiological disease and cause gene mutation, biological deformity etc. are a variety of to lose The significant damage of biography.Simultaneously as the harm of uranium has hidden row, latency and cumulative bad, general public is difficult to discover and can not adopt Effective safeguard procedures are taken, therefore uranium element pollution must be effected a radical cure from source.Traditional chemical precipitation method, electrolysis, UF membrane skill Art cost is big, and technology requirement is high, to the extraction effect unobvious of low concentration uranium.
Water hyacinth biomass contains various active group, uranium ion can by with the free group on its surface be complexed and by Absorption.Water hyacinth biomass porosity is high, large specific surface area, convenient material drawing.Water hyacinth carbon-nitrogen ratio 15 simultaneously:1, it is suitable to detest Aerobe fermentation substrate, methane production rate are high.Therefore producing methane through anaerobic fermentation is carried out again with water hyacinth biomass absorbent uranium, obtained remnants The extraction that object carries out uranium again is a kind of effective way to the processing of Uranium tailings liquid.
The content of the invention
For the above situation, the present invention provides a kind of acquisition method of uranium in Uranium tailings liquid, and this method is to give birth to water hyacinth Substance is inserted in Uranium tailings liquid, and water hyacinth biomass carries out efficient absorption to uranium, and rich uranium biomass is carried out at fermentation after filtering Reason, fermentation residues carry out drying high temperature incineration processing, obtain uranium biology ore.This method have it is easy to operate, it is of low cost, Organic efficiency is high, the multiple advantage such as energy conservation and environmental protection.
It concretely comprises the following steps：（1）Produce water hyacinth biomass；
（2）PH adjustings, stirring and adsorbing processing are carried out to Uranium tailings liquid；
（3）After uranium is by adsorption saturation, filtering, obtained filter residue carries out biogas fermentation；
（4）Fermentation residues are dried, high temperature incineration processing.
Further measure is：
The water hyacinth collected with clear water is rinsed well, after removing root, drying chamber drying is put into, is crushed afterwards with pulverizer, Water hyacinth powdered biomass is obtained by filtration through 200 mesh screens.
Afterwards, the pH value of uranium-bearing tailings liquid is adjusted as 3, then by the dosage of water hyacinth biomass is 1g/L, adds in biology Matter powder stirring and adsorbing 180min.
Uranium tailings liquid after absorption is filtered by 200 mesh filter screens, and gained richness uranium biomass is by microorganism and the matter of biomass Measure ratio 1:1 inoculum concentration is inoculated with methanogen, ferments 7 days.
Fermentation residues carry out drying and processing, then insert in high temperature furnace and burned, and the ash content finally left is The biological ore of uranium.
The present invention solves using water hyacinth and Uranium tailings liquid as material and extracts uranium from low concentration uranium waste liquid with conventional method The problem of existing efficiency is low, pollution is big, of high cost.
The water hyacinth of invention is adopted uranium method and is had the advantage that compared to traditional Uranium tailings liquid extracting method：（1）Water What cucurbit biomass adopted uranium dependence is the adsorption effect of special chemical group contained by water hyacinth and uranium ion, will be in water body Uranium is enriched in biomass, can extract uranium in micro- concentration uranium waste liquid, is not required to expend a large amount of manpower and financial resources, and process is without dirt Dye, it is environmentally protective, economize on resources, economic benefit it is good；
（2）The biogas that biomass marsh gas fermentation generates, can provide marsh gas power generation, bring economic benefit；
（3）Water hyacinth flourish speed is fast, overflows in south China, and method provided by the invention can administer this very well Kind phenomenon, achievees the effect that the treatment of wastes with processes of wastes against one another.
Description of the drawings
Fig. 1 is influence curve figure of the solution ph to water hyacinth biomass absorbent U (VI)；
Fig. 2 is influence curve figure of the water hyacinth biomass dosage to water hyacinth biomass absorbent U (VI)；
Fig. 3 is influence curve figure of the adsorption time to water hyacinth biomass absorbent U (VI).
Specific embodiment
Tie that the present invention is described further with specific embodiment below.
Embodiment 1
As shown in Figure 1, in the case where controlling constant this unitary variant of only pH of other conditions, experiment condition is in room temperature （298 K）Under, in 100ml solution, dosage is 0.1g dry powder of water hyacinth adsorbents, and initial 15 μ g/L of uranium concentration are used HCl and NaOH solution adjust solution ph, and dry powder of water hyacinth adsorbent changes the adsorption capacity of uranium with the variation of pH value, inhale After attached 4h, adsorption rate highest when solution pH value is 3 or so.
Embodiment 2
As shown in Fig. 2, in the case where controlling constant this unitary variant of only dosage of other conditions, experiment condition be Room temperature（298 K）Under, in 100ml solution, pH 3, initial 15 μ g/L of uranium concentration, after adsorbing 4h, when modified dry powder of water hyacinth Dosage be 0.1g when, removal rate highest, up to 80% or so.
Embodiment 3
From figure 3, it can be seen that in the case where controlling constant this unitary variant of only adsorption time of other conditions, experiment condition For in room temperature（298 K）Under, in 100ml solution, pH 3, dosage 0.1g, initial 15 μ g/L of uranium concentration, modified water calabash Infiltration rate of the capacity sorbent time of reed dry powder adsorption uranium in 180min is fast, reaches equilibrium state afterwards.
Economic benefit of engineering calculates：
1. engineering day processing Uranium tailings liquid about 50m3, uranium content 5*10-6G/ml, day obtain U3O8Measure 33kg.Produce U per year3O8 12 tons of amount is recycled as uranium resource, and value is considerable, and Reclaiming benefit is up to 10.8 hundred million RMB.
2. produce biogas 1500m daily3, generate electricity 2250kwh daily, year processing tailing 18250m3, produce biogas 547500m per year3, Year power generation 821250kwh, is calculated by 0.5 yuan/kwh, made a profit 410,000 yuan.
Marsh gas power generation cost：9.84 ten thousand yuan,
Marsh gas power generation total revenue：31.16 ten thousand yuan.

Claims (5)

1. a kind of water hyacinth biomass uranium extraction method, it is characterised in that：The high-efficiency adsorbent water hyacinth biomass of uranium is put into uranium Stirring and adsorbing in tailings liquid treats that water hyacinth biomass is enriched to uranium, filtering, and biogas fermentation is carried out to the uranium-bearing biomass after filtering Processing, dries fermentation residues and high temperature incineration is handled, and the ash content left is uranium-bearing biology ore.
2. a kind of water hyacinth biomass uranium extraction method according to claim 1, which is characterized in that water hyacinth biomass adopts uranium Concretely comprise the following steps：
(1) water hyacinth powdered biomass is produced；
(2) PH adjustings, input water hyacinth powdered biomass and stirring and adsorbing processing are carried out to Uranium tailings liquid；
(3) after uranium is adsorbed to, filtering, obtained filter residue is used for biogas fermentation；
(4) high temperature incineration processing is carried out to it again after drying fermentation residues, the ash content left is uranium-bearing biology ore.
3. a kind of water hyacinth biomass uranium extraction method according to claim 1, it is characterised in that：The water hyacinth collected is used Clear water is rinsed well, after removing root, is put into drying chamber drying, is crushed afterwards with pulverizer, water is obtained by filtration through 200 mesh screens Cucurbit powdered biomass.
4. a kind of water hyacinth biomass uranium extraction method according to claim 1, it is characterised in that：Adjust uranium-bearing tailings liquid PH value is 3, then by water hyacinth biomass dosage for 1g/L, add in biomass powder stirring and adsorbing 180min.
5. a kind of water hyacinth biomass uranium extraction method according to claim 1, it is characterised in that：Uranium tailings liquid after absorption It is filtered by 200 mesh filter screens, gained richness uranium biomass is by microorganism and the mass ratio 1 of biomass:1 inoculum concentration is inoculated with methane phase Bacterium is fermented 7 days.
CN201710938371.8A 2017-10-11 2017-10-11 A kind of water hyacinth biomass uranium extraction method Pending CN108101139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710938371.8A CN108101139A (en) 2017-10-11 2017-10-11 A kind of water hyacinth biomass uranium extraction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710938371.8A CN108101139A (en) 2017-10-11 2017-10-11 A kind of water hyacinth biomass uranium extraction method

Publications (1)

Publication Number Publication Date
CN108101139A true CN108101139A (en) 2018-06-01

Family

ID=62207510

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710938371.8A Pending CN108101139A (en) 2017-10-11 2017-10-11 A kind of water hyacinth biomass uranium extraction method

Country Status (1)

Country Link
CN (1) CN108101139A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1740328A (en) * 2005-09-13 2006-03-01 广东琪田农药化工有限公司 Method and apparatus for comprehensively utilizing water hyacinth plant residue to produce methane
CN101275150A (en) * 2008-05-13 2008-10-01 江苏省农业科学院 Fermentation method for changing methane into resource by using water hyacinth and application of product produced thereby
CN101560525A (en) * 2009-07-07 2009-10-21 天津大学 Biomass pretreatment method, method and equipment for preparing firedamp by biomass anaerobic fermentation
CN101672180A (en) * 2009-10-15 2010-03-17 南华大学 New uranium mining method-plant uranium mining method
WO2010060050A2 (en) * 2008-11-21 2010-05-27 North Carolina State University High consistency enzymatic hydrolysis for the production of ethanol
CN106975461A (en) * 2017-05-15 2017-07-25 东华理工大学 A kind of dry powder of water hyacinth adsorbent and adsorption uranium and aftertreatment technology

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1740328A (en) * 2005-09-13 2006-03-01 广东琪田农药化工有限公司 Method and apparatus for comprehensively utilizing water hyacinth plant residue to produce methane
CN101275150A (en) * 2008-05-13 2008-10-01 江苏省农业科学院 Fermentation method for changing methane into resource by using water hyacinth and application of product produced thereby
WO2010060050A2 (en) * 2008-11-21 2010-05-27 North Carolina State University High consistency enzymatic hydrolysis for the production of ethanol
CN101560525A (en) * 2009-07-07 2009-10-21 天津大学 Biomass pretreatment method, method and equipment for preparing firedamp by biomass anaerobic fermentation
CN101672180A (en) * 2009-10-15 2010-03-17 南华大学 New uranium mining method-plant uranium mining method
CN106975461A (en) * 2017-05-15 2017-07-25 东华理工大学 A kind of dry powder of water hyacinth adsorbent and adsorption uranium and aftertreatment technology

Similar Documents

Publication Publication Date Title
Kikuchi et al. Biological removal and recovery of toxic heavy metals in water environment
CN112657465B (en) Preparation method of magnetic biochar and method for treating tailing wastewater
CN107983314A (en) A kind of biological carbon composite of sodium alginate-calcium ion modification and preparation method thereof and purposes
CN105253979B (en) Flocculating purifying agent of river course heavy metal containing sewage and preparation method thereof and application method
CN102500612A (en) Chemical leaching restoring method for soil polluted by heavy metals
CN107362773A (en) It is a kind of efficiently to remove heavy metal lead and cadmium mushroom bacteria residue charcoal adsorbent and preparation method thereof
CN105126749A (en) Domestic sludge-based charcoal preparation method, and application of charcoal
Liu et al. Techno-economic evaluation of the integrated biosorption–pyrolysis technology for lead (Pb) recovery from aqueous solution
CN106315848A (en) Method for synchronously removing nitrate and arsenic in underground water by natural pyrrhotite and application of method
CN107175065B (en) A kind of processing and reuse method of organo-mineral complexing Contaminated Loess leacheate
CN101612548B (en) Method for extracting magnetic minerals to remedy heavy metal pollution of water body with fly ash
CN104785519A (en) Method for in situ fixation of vanadium ore polluted soil by modified charcoal
CN107456950A (en) A kind of preparation of brewex's grains charcoal and its application in lead waste water
CN106975461A (en) A kind of dry powder of water hyacinth adsorbent and adsorption uranium and aftertreatment technology
CN109797020A (en) A kind of preparation method of the plant biological charcoal for heavy-metal contaminated soil reparation
CN109225163A (en) A kind of method of cadmium in compound magnetic microalgae biological adsorption agent and its absorption waste water
CN105688836A (en) Adsorption material for removing lead from solution and preparation method of adsorption material
CN108109712A (en) Water hyacinth biomass adopts uranium series system
CN108101139A (en) A kind of water hyacinth biomass uranium extraction method
CN102745818A (en) Method for removing low-concentration cadmium ions from wastewater by using active microalgae
CN102992557A (en) Method for effectively removing heavy metal from bottom mud
CN109609152A (en) The method of high protein algae and waste plastic pyrolysis gas-solid bipolar mixture dechlorination charcoal processing
Fu et al. A review on the status and development of hyperaccumulator harvests treatment technology
CN213924265U (en) Device for treating mine ammonia nitrogen wastewater by series parallel graded adsorption and reverse osmosis
CN104004691B (en) A kind of bacterial strain repaired for As polluted soil and application process 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: 20180601

WD01 Invention patent application deemed withdrawn after publication