CN110526773A - A kind of soil-repairing agent and preparation method thereof - Google Patents

A kind of soil-repairing agent and preparation method thereof Download PDF

Info

Publication number
CN110526773A
CN110526773A CN201910819505.3A CN201910819505A CN110526773A CN 110526773 A CN110526773 A CN 110526773A CN 201910819505 A CN201910819505 A CN 201910819505A CN 110526773 A CN110526773 A CN 110526773A
Authority
CN
China
Prior art keywords
parts
soil
mixed
calcium
shellac
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.)
Withdrawn
Application number
CN201910819505.3A
Other languages
Chinese (zh)
Inventor
不公告发明人
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN201910819505.3A priority Critical patent/CN110526773A/en
Publication of CN110526773A publication Critical patent/CN110526773A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The present invention discloses a kind of soil-repairing agent, raw material including following parts by weight proportion: 19-25 parts of ferrous sulfate, 10-15 parts of shellac, 7-12 parts of calcium chloride, 10-15 parts of sodium metasilicate, 28-56 parts of wormcast, 44-49 parts of turfy soil, 20-25 parts of diatomite, 10-20 parts of vermiculite, 2-4 parts of sodium carboxymethylcellulose, 7-10 parts of gallic acid, 6-10 parts of calcium lignosulfonate, 12-14 parts of humic acid and 10-12 parts of calcium phosphate, which can effectively repair alkali-affected soil.

Description

A kind of soil-repairing agent and preparation method thereof
Technical field
The present invention relates to a kind of soil-repairing agents and preparation method thereof.
Background technique
The phenomenon that upper soll layer basic salt gradually accumulates, exchangeable sodium ion saturation degree gradually increases.Alkalinization is often Occur together with desalination processes, but desalination might not cause to alkalize.When alkalinization is due to Soil Desalting, in the soil liquid Sodium ion and soil colloid in calcium and magnesium ion be exchanged, so that soil colloid is adsorbed more exchangeable sodium, soil is in highly basic Property reaction, pH deteriorates soil physical properties in 8.5-9 or more, and soil high granular expands when wet, hardened, permeability when doing It is very poor, the serious growth and development for interfering crop.Therefore, it is necessary to a kind of renovation agent that can repair alkali-affected soil is developed, with Prevent alkalization of soils.
Summary of the invention
The technical problem to be solved in the present invention is to provide one kind can effectively repair alkali-affected soil soil-repairing agent and Preparation method.
To solve the above problems, the present invention adopts the following technical scheme:
A kind of soil-repairing agent, the raw material including following parts by weight proportion: 19-25 parts of ferrous sulfate, shellac 10-15 Part, 7-12 parts of calcium chloride, 10-15 parts of sodium metasilicate, 28-56 parts of wormcast, 44-49 parts of turfy soil, 20-25 parts of diatomite, vermiculite 10-20 parts, 2-4 parts of sodium carboxymethylcellulose, 7-10 parts of gallic acid, 6-10 parts of calcium lignosulfonate, 12-14 parts of humic acid and 10-12 parts of calcium phosphate.
Further, including following parts by weight proportion raw material: 19 parts of ferrous sulfate, 10 parts of shellac, 7 parts of calcium chloride, 10 parts of sodium metasilicate, 28 parts of wormcast, 44 parts of turfy soil, 20 parts of diatomite, 10 parts of vermiculite, 2 parts of sodium carboxymethylcellulose, galla turcica 7 parts of acid, 6 parts of calcium lignosulfonate, 12 parts of humic acid and 10 parts of calcium phosphate.
Further, including following parts by weight proportion raw material: 25 parts of ferrous sulfate, 15 parts of shellac, 12 parts of calcium chloride, 15 parts of sodium metasilicate, 56 parts of wormcast, 49 parts of turfy soil, 25 parts of diatomite, 20 parts of vermiculite, 2 parts of sodium carboxymethylcellulose, galla turcica 7 parts of acid, 6 parts of calcium lignosulfonate, 12 parts of humic acid and 10 parts of calcium phosphate.
Further, including following parts by weight proportion raw material: 24 parts of ferrous sulfate, 14 parts of shellac, 10 parts of calcium chloride, 13 parts of sodium metasilicate, 48 parts of wormcast, 46 parts of turfy soil, 23 parts of diatomite, 15 parts of vermiculite, 3 parts of sodium carboxymethylcellulose, galla turcica 8 parts of acid, 8 parts of calcium lignosulfonate, 13 parts of humic acid and 11 parts of calcium phosphate.
Another technical problem to be solved by the present invention is that providing a kind of preparation method of soil-repairing agent, including following step It is rapid:
1) ferrous sulfate 19-25 parts, 7-12 parts of calcium chloride, 7-10 parts of gallic acid and 10-15 parts of sodium metasilicate pour into together Mixed processing is carried out into mixing machine, and mixed-powder is made, it is spare；
2) mixed-powder made from step 1) is divided into A parts and B parts, it is spare；
3) by A made from step 2) parts of mixed-powder and 2-4 parts of sodium carboxymethylcellulose be poured into mixing machine together into Row mixed processing is poured into pelletizer after mixing and carries out granulation processing, and plastochondria is made, spare；
4) 10-15 parts of shellac are poured into vessel and are heated, so that shellac is completely dissolved, then by liquid worm Glue even application forms membrane body to plastochondria outer surface, and the powder with membrane body is made, spare；
5) by 28-56 parts of wormcast, 44-49 parts of turfy soil, 20-25 parts of diatomite, 10-20 parts of vermiculite, lignin sulfonic acid Powder made from B part mixed-powder and step 4) in 6-10 parts of calcium, 12-14 parts of humic acid and 10-12 parts of calcium phosphate, step 2) It is poured into mixing machine together and carries out mixed processing, be uniformly mixed to get soil-repairing agent.
The beneficial effects of the present invention are: the pH value of soil can be adjusted effectively, while nutrition is provided for soil, and The characteristics of Auto-regulator of a part is made into the powder with shellac film, and it is not alkaline-resisting to be utilized shellac, can be easy alkali, once it is native When earth alkalizes again, shellac film be easy to cause damage, to release regulator, prevents soil serious alkalization again, can be with Good automatic protecting function is played, can effectively prevent because monitoring and negligent supervision cause soil seriously to alkalize.
The characteristics of being the raw material of soil-repairing agent below or effect:
Ferrous sulfate: ferrous sulfate category highly acid, and be it is quick-acting, pour Shi Houneng make basic soil in acidity, it is adjustable Soil acidity or alkalinity promotes chlorophyll formation, can prevent and treat flowers and trees yellows because of caused by iron deficiency.It is to like acid flowers and trees especially sago cycas Indispensable element.Pesticide is agriculturally also acted as, can prevent and treat wheat smut, the corruption of the scar scall, fruit tree of apple and pears Rotten disease；It also is used as fertilizer, moss and the lichens of trunk can be removed.
Shellac: having thermoplasticity and thermosetting property, can be dissolved in pure and mild alkali, oil resistant, acidproof, nontoxic to people, non-stimulated, as film Agent；
Calcium chloride: colourless cubic crystal body, white or canescence have that granular, honeycomb is blocky, spherical shape, irregular particle It is shape, powdered.Micro- malicious, odorless, mildly bitter flavor.Hygroscopicity is extremely strong, is exposed in air and easily deliquesces.It is soluble easily in water, it releases simultaneously A large amount of heat, when film occurs being corroded and rupture, calcium chloride, which touches moisture, can release a large amount of heat, so that powder is swollen It is swollen, accelerate to disintegrate, while calcium constituent can be provided for soil.Calcium chloride have stronger hygroscopicity and water reaction after generally in weak acid Property, it is used as soil conditioner.
Sodium metasilicate: waterglass and calcium chloride solution can play the role of concertedness, and the silicic acid gel of generation is in wet environment Under, because moisture is in swelling state in absorbent earth, make native consolidation, reinforces soil.
Wormcast: tend to be neutral, be good decomposed manure material, while being also the soil with crumb structure, to work Object growth and development has preferable facilitation.
Turfy soil: turf, that is, peat is the product in formation process of bog.By the residuum of limnocryptophyte, in the suspicion of more water Under the conditions of gas, it cannot decompose and accumulate completely, pH value is generally 5.5-6.5, is in subacidity, can play and adjust pH value Effect contains a large amount of organic matter simultaneously, provides nutrition for soil.
Diatomite: pH value is neutral, nontoxic, and suspendability is good, and absorption property is strong, and bulk density is light, can play in the soil moisturizing, Loose soil property extends drug effect fertilizer efficiency time, encourages crop growth effect.
Vermiculite: can be used as soil conditioner, since it is with good cationic exchangeability and adsorptivity, can improve soil Structure, water storage soil moisture conservation, improve the gas permeability and the property of water-bearing of soil, acid soil made to become neutral soil；Vermiculite may also function as Buffer function hinders the rapid variation of pH value, makes fertilizer slow release in plant growth medium, and allows to use slightly excessively Fertilizer and be safe from harm to plant；Vermiculite can also provide K, Mg, Ca, the Fe itself contained and micro Mn, Cu, Zn to crop Equal elements
Sodium carboxymethylcellulose: white fibrous or particulate powder.It is odorless, have hygroscopicity, be used as adhesive.
Gallic acid: being that a kind of polyphenol compound existing for nature has in fields such as food, biology, medicine, chemical industry It is widely applied.It can be used as plant growth regulator, while adjusting pH value
Calcium lignosulfonate: there is very strong dispersibility, caking property, sequestering, have extensively in terms of pesticide and soil Application.
Humic acid: have the function of fertilizer synergistic, improvement soil, stimulation plant growth, improvement agricultural product quality etc..
Calcium phosphate: phosphorus and calcium constituent are provided.
Specific embodiment
Technical solution of the present invention is described below, it is clear that described embodiment is only present invention a part Embodiment, instead of all the embodiments, to those skilled in the art, in the premise not made the creative labor Under, other embodiments can also be obtained according to these embodiments.
Embodiment 1:
A kind of soil-repairing agent, the raw material including following parts by weight proportion: 19 parts of ferrous sulfate, 10 parts of shellac, chlorination 7 parts of calcium, 10 parts of sodium metasilicate, 28 parts of wormcast, 44 parts of turfy soil, 20 parts of diatomite, 10 parts of vermiculite, 2 parts of sodium carboxymethylcellulose, 7 parts of gallic acid, 6 parts of calcium lignosulfonate, 12 parts of humic acid and 10 parts of calcium phosphate.
A kind of preparation method of soil-repairing agent the following steps are included:
1) 19 parts of ferrous sulfate, 7 parts of calcium chloride, 7 parts of gallic acid and 10 parts of sodium metasilicate be poured into mixing machine together into Mixed-powder is made in row mixed processing, spare；
2) mixed-powder made from step 1) is divided into A parts and B parts, it is spare；
3) A made from step 2) parts of mixed-powder and 2 parts of sodium carboxymethylcellulose are poured into together in mixing machine and are carried out Mixed processing is poured into pelletizer after mixing and carries out granulation processing, and plastochondria is made, spare；
4) 10 parts of shellac are poured into vessel and are heated, so that shellac is completely dissolved, then by liquid shellac Even application forms membrane body to plastochondria outer surface, and the powder with membrane body is made, spare；
5) by 28 parts of wormcast, 44 parts of turfy soil, 20 parts of diatomite, 10 parts of vermiculite, 6 parts of calcium lignosulfonate, humic acid Powder made from 12 parts and 10 parts of calcium phosphate, B part mixed-powder in step 2) and step 4) be poured into mixing machine together into Row mixed processing is uniformly mixed to get soil-repairing agent.
Embodiment 2:
A kind of soil-repairing agent, the raw material including following parts by weight proportion: 25 parts of ferrous sulfate, 15 parts of shellac, chlorination 12 parts of calcium, 15 parts of sodium metasilicate, 56 parts of wormcast, 49 parts of turfy soil, 25 parts of diatomite, 20 parts of vermiculite, sodium carboxymethylcellulose 2 Part, 7 parts of gallic acid, 6 parts of calcium lignosulfonate, 12 parts of humic acid and 10 parts of calcium phosphate.
A kind of preparation method of soil-repairing agent, comprising the following steps:
1) 25 parts of ferrous sulfate, 12 parts of calcium chloride, 10 parts of gallic acid and 15 parts of sodium metasilicate are poured into mixing machine together Mixed processing is carried out, mixed-powder is made, it is spare；
2) mixed-powder made from step 1) is divided into A parts and B parts, it is spare；
3) A made from step 2) parts of mixed-powder and 4 parts of sodium carboxymethylcellulose are poured into together in mixing machine and are carried out Mixed processing is poured into pelletizer after mixing and carries out granulation processing, and plastochondria is made, spare；
4) 15 parts of shellac are poured into vessel and are heated, so that shellac is completely dissolved, then by liquid shellac Even application forms membrane body to plastochondria outer surface, and the powder with membrane body is made, spare；
5) by 56 parts of wormcast, 49 parts of turfy soil, 25 parts of diatomite, 20 parts of vermiculite, 10 parts of calcium lignosulfonate, humic acid Powder made from 14 parts and 12 parts of calcium phosphate, B part mixed-powder in step 2) and step 4) be poured into mixing machine together into Row mixed processing is uniformly mixed to get soil-repairing agent.
Embodiment 3:
A kind of soil-repairing agent, the raw material including following parts by weight proportion: 24 parts of ferrous sulfate, 14 parts of shellac, chlorination 10 parts of calcium, 13 parts of sodium metasilicate, 48 parts of wormcast, 46 parts of turfy soil, 23 parts of diatomite, 15 parts of vermiculite, sodium carboxymethylcellulose 3 Part, 8 parts of gallic acid, 8 parts of calcium lignosulfonate, 13 parts of humic acid and 11 parts of calcium phosphate.
A kind of preparation method of soil-repairing agent, comprising the following steps:
1) 24 parts of ferrous sulfate, 10 parts of calcium chloride, 8 parts of gallic acid and 13 parts of sodium metasilicate be poured into mixing machine together into Mixed-powder is made in row mixed processing, spare；
2) mixed-powder made from step 1) is divided into A parts and B parts, it is spare；
3) A made from step 2) parts of mixed-powder and 3 parts of sodium carboxymethylcellulose are poured into together in mixing machine and are carried out Mixed processing is poured into pelletizer after mixing and carries out granulation processing, and plastochondria is made, spare；
4) 14 parts of shellac are poured into vessel and are heated, so that shellac is completely dissolved, then by liquid shellac Even application forms membrane body to plastochondria outer surface, and the powder with membrane body is made, spare；
5) by 48 parts of wormcast, 46 parts of turfy soil, 23 parts of diatomite, 15 parts of vermiculite, 8 parts of calcium lignosulfonate, humic acid Powder made from 13 parts and 11 parts of calcium phosphate, B part mixed-powder in step 2) and step 4) be poured into mixing machine together into Row mixed processing is uniformly mixed to get soil-repairing agent.
Experimental example:
Using embodiment 1 renovation agent handle soil, soil pH=10 to be improved, basicity 40%, salt content 1.2%, 1500kg/ mus of conditioner amount of application of improvement.Soil pH is reduced to 7.5 or so after improvement, and basicity is down to 5% or so, uses effect Fruit is obvious.
Using embodiment 2 renovation agent handle soil, soil pH=10 to be improved, basicity 40%, salt content 1.2%, 1500kg/ mus of conditioner amount of application of improvement.Soil pH is reduced to 6.5 or so after improvement, and basicity is down to 4% or so, uses effect Fruit is obvious.
Using embodiment 3 renovation agent handle soil, soil pH=10 to be improved, basicity 40%, salt content 1.2%, 1500kg/ mus of conditioner amount of application of improvement.Soil pH is reduced to 7.0 or so after improvement, and basicity is down to 5% or so, uses effect Fruit is obvious.
The beneficial effects of the present invention are: the pH value of soil can be adjusted effectively, while nutrition is provided for soil, and The characteristics of Auto-regulator of a part is made into the powder with shellac film, and it is not alkaline-resisting to be utilized shellac, can be easy alkali, once it is native When earth alkalizes again, shellac film be easy to cause damage, to release regulator, prevents soil serious alkalization again, can be with Good automatic protecting function is played, can effectively prevent because monitoring and negligent supervision cause soil seriously to alkalize.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any The change or replacement expected without creative work, should be covered by the protection scope of the present invention.

Claims (5)

1. a kind of soil-repairing agent, which is characterized in that the raw material including following parts by weight proportion: 19-25 parts of ferrous sulfate, worm 10-15 parts of glue, 7-12 parts of calcium chloride, 10-15 parts of sodium metasilicate, 28-56 parts of wormcast, 44-49 parts of turfy soil, diatomite 20-25 Part, 10-20 parts of vermiculite, 2-4 parts of sodium carboxymethylcellulose, 7-10 parts of gallic acid, 6-10 parts of calcium lignosulfonate, humic acid 12-14 parts and calcium phosphate 10-12 parts.
2. a kind of soil-repairing agent as described in claim 1, which is characterized in that the raw material including following parts by weight proportion: 19 parts of ferrous sulfate, 10 parts of shellac, 7 parts of calcium chloride, 10 parts of sodium metasilicate, 28 parts of wormcast, 44 parts of turfy soil, 20 parts of diatomite, 10 parts of vermiculite, 2 parts of sodium carboxymethylcellulose, 7 parts of gallic acid, 6 parts of calcium lignosulfonate, 12 parts of humic acid and calcium phosphate 10 Part.
3. a kind of soil-repairing agent as described in claim 1, which is characterized in that the raw material including following parts by weight proportion: 25 parts of ferrous sulfate, 15 parts of shellac, 12 parts of calcium chloride, 15 parts of sodium metasilicate, 56 parts of wormcast, 49 parts of turfy soil, 25 parts of diatomite, 20 parts of vermiculite, 2 parts of sodium carboxymethylcellulose, 7 parts of gallic acid, 6 parts of calcium lignosulfonate, 12 parts of humic acid and calcium phosphate 10 Part.
4. a kind of soil-repairing agent as described in claim 1, which is characterized in that the raw material including following parts by weight proportion: 24 parts of ferrous sulfate, 14 parts of shellac, 10 parts of calcium chloride, 13 parts of sodium metasilicate, 48 parts of wormcast, 46 parts of turfy soil, 23 parts of diatomite, 15 parts of vermiculite, 3 parts of sodium carboxymethylcellulose, 8 parts of gallic acid, 8 parts of calcium lignosulfonate, 13 parts of humic acid and calcium phosphate 11 Part.
5. a kind of preparation method of soil-repairing agent, which comprises the following steps:
1) ferrous sulfate 19-25 parts, 7-12 parts of calcium chloride, 7-10 parts of gallic acid and 10-15 parts of sodium metasilicate are poured into mixed together Mixed processing is carried out in conjunction machine, and mixed-powder is made, it is spare；
2) mixed-powder made from step 1) is divided into A parts and B parts, it is spare；
3) A made from step 2) parts of mixed-powder and 2-4 parts of sodium carboxymethylcellulose are poured into mixing machine together and are mixed Conjunction processing, is poured into pelletizer after mixing and carries out granulation processing, and plastochondria is made, spare；
4) 10-15 parts of shellac are poured into vessel and are heated, so that shellac is completely dissolved, it is then that liquid shellac is equal The even plastochondria outer surface that sprays to forms membrane body, and the powder with membrane body is made, spare；
5) by 28-56 parts of wormcast, 44-49 parts of turfy soil, 20-25 parts of diatomite, 10-20 parts of vermiculite, calcium lignosulfonate 6- Powder made from B part mixed-powder and step 4) in 10 parts, 12-14 parts of humic acid and 10-12 parts of calcium phosphate, step 2) is together It is poured into mixing machine and carries out mixed processing, be uniformly mixed to get soil-repairing agent.
CN201910819505.3A 2019-08-31 2019-08-31 A kind of soil-repairing agent and preparation method thereof Withdrawn CN110526773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910819505.3A CN110526773A (en) 2019-08-31 2019-08-31 A kind of soil-repairing agent and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910819505.3A CN110526773A (en) 2019-08-31 2019-08-31 A kind of soil-repairing agent and preparation method thereof

Publications (1)

Publication Number Publication Date
CN110526773A true CN110526773A (en) 2019-12-03

Family

ID=68665872

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910819505.3A Withdrawn CN110526773A (en) 2019-08-31 2019-08-31 A kind of soil-repairing agent and preparation method thereof

Country Status (1)

Country Link
CN (1) CN110526773A (en)

Similar Documents

Publication Publication Date Title
Maucieri et al. Hydroponic technologies
CN103756684B (en) A kind of soil conditioner with multiple benefits
US7534280B2 (en) Fertilizers containing polyamino acid
CN104119168B (en) The production method of concave convex rod compression Nutrition Soil
WO2002059063A1 (en) Fertilizing composition for amending and structuring saline soils and alkyli soils
CN108865166B (en) Saline-alkali soil synergistic improver and preparation method and application thereof
WO2006115758A2 (en) Fertilizers containing polyamino acid
CN110437844A (en) A kind of preparation of saline-alkali land soil conditioner and method of administration
CN105218235B (en) A kind of auxotype is retained the preparation method for the complex fertilizer that loosens the soil
CN103011973A (en) Manufacture method of synergic type nitrogen-phosphorus-potassium mixed fertilizer with slow release and loss control effect
CN104926561B (en) A kind of soil conditioner and preparation method thereof for soil remediation
CN101724406A (en) Secondary salinization soil medlar special modifier and method for processing same
KR101372905B1 (en) Bed Soil for Crops
US20130227998A1 (en) Fertiliser
CN103819265B (en) The special calcareous fertilisers of wheat, its preparation and method of cultivated wheat
US4670039A (en) Timed release fertilizer composition and means
CN105112068B (en) A kind of soil conditioner and preparation method thereof containing coconut palm chaff
CN109180351B (en) Moisture-proof silicon-magnesium-boron-zinc composite granular fertilizer and preparation method thereof
CN110526773A (en) A kind of soil-repairing agent and preparation method thereof
CN103011972A (en) Manufacture method of synergic type nitrogenous fertilizer with slow release and loss control effect
JPS6279714A (en) Soil for culture of crops
DE2407491A1 (en) GRANULATED MANUFACTURING AGENTS BASED ON ALKALINE-CONTAINING GLUE PHOSPHATES AND THE PROCESS FOR THEIR PRODUCTION
CN104804746A (en) Modifier for degrading salinity alkalinity of potato saline-alkali soil
RU2713692C1 (en) Method of preparing organosilicon fertilizer
KR101376192B1 (en) Bed soil for horticultural purpose using the illite and method of manufacturing the same

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
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20191203