WO2021012062A1 - Procédé d'obtention d'une solution acide et homogène de chitosane-silice stable à court terme comprenant la préparation d'une solution acide de chitosane dans une concentration en poids de 2-20% de chitosane et une solution solide de silice dans une concentration de 2-30% de silice - Google Patents

Procédé d'obtention d'une solution acide et homogène de chitosane-silice stable à court terme comprenant la préparation d'une solution acide de chitosane dans une concentration en poids de 2-20% de chitosane et une solution solide de silice dans une concentration de 2-30% de silice Download PDF

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Publication number
WO2021012062A1
WO2021012062A1 PCT/CL2020/050071 CL2020050071W WO2021012062A1 WO 2021012062 A1 WO2021012062 A1 WO 2021012062A1 CL 2020050071 W CL2020050071 W CL 2020050071W WO 2021012062 A1 WO2021012062 A1 WO 2021012062A1
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WO
WIPO (PCT)
Prior art keywords
chitosan
solution
silicon
acidic
concentration
Prior art date
Application number
PCT/CL2020/050071
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English (en)
Spanish (es)
Inventor
Marcia Eugenia KEHR DUHART
Original Assignee
Kehr Duhart Marcia Eugenia
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 Kehr Duhart Marcia Eugenia filed Critical Kehr Duhart Marcia Eugenia
Publication of WO2021012062A1 publication Critical patent/WO2021012062A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N63/00—Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
    • C08L5/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof

Definitions

  • the invention described corresponds to a method for obtaining an acidic and homogeneous solution of chitosan at 2-20% and silicon acid at 2-30% stable in the short term.
  • This composition has properties of biopesticide, biofertilizer, biostimulant, SAR effect (Acquired Systemic Resistance) and tolerance of the plant against stress conditions, which enhances both the growth of the plant and the prevention of infections from pathogens and a better postharvest.
  • Chitosan is prepared by adding chitin to an aqueous solution, where chitosan is generated, dissolved, and concentrated in suspension by adding the enzyme chitin deacetylase, which converts chitin to chitosan.
  • the chitosan remains in solution after the incorporation of the other additives with constant moderate stirring (CN102067888B).
  • NanoChisil is a mixture between silicon and chitosan for use as a fertilizer in corn crops to improve production. This allows the reduction of the use of traditional fertilizers as a substitute, from natural and low-cost sources [4]
  • the invention described corresponds to a method for obtaining a (a) acidic and homogeneous solution of chitosan at 2-20% in water, and (b) acid silicon at 2-30% stable in the short term.
  • This composition has properties of biopesticide, biofertilizer, biostimulant, SAR effect and tolerance of the plant against stress conditions, which enhances both the growth of the plant and the prevention of infections from pathogens and a better postharvest.
  • the method is made up of the steps mentioned below:
  • Chitosan is a polymer processed from chitin, obtained from the exoskeletons of insects, shrimp, crabs, among others. This has a biostimulatory effect on plant growth and as a biopesticide.
  • the chitosan solution at 2-20% by weight is obtained by gradually dissolving deacetylated chitosan in a solution of an acid and water at an acidic pH. Chitosan dissolves progressively in an aqueous solution at acidic pH and the acid acts as an additional effective solvent.
  • the obtained mixture becomes homogeneous after moderate stirring for about 1 hour at room temperature, the undissolved suspended solids are filtered and a viscous clear solution is obtained as the product.
  • Potassium silicate is a mineral that precipitates under acidic conditions, polymerizing in chains of silicon oxide (quartz).
  • Sodium silicate is not used since sodium is an unwanted mineral in agriculture.
  • To obtain an acidic silicon solution 100% silicon silica is used as raw material. It is formulated 2-30% dissolved in water at pH 4, an aqueous solution is produced at pH 4 using an acid as an acidifying agent. Additives such as ethyl alcohol and propylene glycol are added to this solution to prevent the precipitation of silicon at acidic pH. Then, it is stirred moderately for 30 minutes to 1 hour at room temperature to homogenize the mixture, and not to generate nucleation sites and to start polymerizing. 3.
  • SILICON-CHITOSANE SOLUTION is a mineral that precipitates under acidic conditions, polymerizing in chains of silicon oxide (quartz).
  • Sodium silicate is not used since sodium is an unwanted mineral in agriculture.
  • To obtain an acidic silicon solution 100% silicon silica is used as raw material. It is formulated
  • the solutions of chitosan 2-20% and silicon 2-30% are mixed in a volumetric ratio of 1: 1.
  • the final mixture is homogenized by moderate stirring for 30 minutes to 1 hour at room temperature, filtered the solid undissolved particles and leave it to rest for 2 hours. In case of formation of new granules, the mixture is again shaken, filtered and settling until no more granules are generated in the short term.
  • the final solution is packaged and stored in the cellar.
  • the methodology is effective regarding the difficulty of generating and maintaining a stable solution from the mixture of solutions at a high concentration of silicon and chitosan.
  • the mixture obtained from both products allows the dissolution of silicon and chitosan at an acidic pH and stable and fluid enough to be worked using the proposed methodology, in the short term.
  • this aqueous mixture of silicon-chitosan is to be a biopesticide, biostimulant, biofertilizer, SAR effect in plants and greater tolerance under stress conditions, achieving a firmer, healthier fruit with better postharvest condition.
  • this product When used and applied to the foliage, this product adheres to the cell walls of the cuticular and subcuticular layers, forming a silicon oxide (quartz) film, which provides firmness and elasticity to the treated tissues. Together with chitosan, they form a barrier that reduces dehydration, photo-oxidation and controls the entry of certain microorganisms into the plant. This control is carried out directly and by artificially activating the elicitor effect of the plant or SAR, where the chitosan molecule acts as a hormonal signal that indicates the presence of localized damage in the area of application of the plant, both mechanically and by pathogenic microbial agents.
  • the plant responds to this signal by activating its immune system, generating compounds or enzymes with antimicrobial activity, which consequently reduces the damage caused by these microorganisms. This allows the cultivation of plants to have a better state of health and increases the yield of the crops and their post-harvest condition.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Zoology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental Sciences (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Dentistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Virology (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

Un procédé d'obtention d'une solution acide et homogène de chitosane-silice stable à court terme, qui fournit des propriétés biopesticides, biofertitilisantes, biostimulantes, un effet SAR (résistance systémique acquise) et de tolérance de la plante vis-à-vis de conditions de stress, qui comprend une solution acide et homogène de chitosane-silice comprenant : (a) une solution acide de chitosane dans une concentration en poids de 2-20% de chitosane et (b) une solution acide de silice dans une concentration en poids de 2-30% de silice, comprend : étape (1) l'élaboration de la solution de chitosane, étape (2) l'élaboration de la solution de silide et étape (3) l'élaboration de chitosane-silice.
PCT/CL2020/050071 2019-07-23 2020-07-07 Procédé d'obtention d'une solution acide et homogène de chitosane-silice stable à court terme comprenant la préparation d'une solution acide de chitosane dans une concentration en poids de 2-20% de chitosane et une solution solide de silice dans une concentration de 2-30% de silice WO2021012062A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CL2019002055A CL2019002055A1 (es) 2019-07-23 2019-07-23 Método de obtención de una solución de quitosano-silicio en proporciones de hasta un 20% de quitosano y 30% de silicio ácido
CL2055-2019 2019-07-23

Publications (1)

Publication Number Publication Date
WO2021012062A1 true WO2021012062A1 (fr) 2021-01-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CL2020/050071 WO2021012062A1 (fr) 2019-07-23 2020-07-07 Procédé d'obtention d'une solution acide et homogène de chitosane-silice stable à court terme comprenant la préparation d'une solution acide de chitosane dans une concentration en poids de 2-20% de chitosane et une solution solide de silice dans une concentration de 2-30% de silice

Country Status (2)

Country Link
CL (1) CL2019002055A1 (fr)
WO (1) WO2021012062A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08283104A (ja) * 1995-04-13 1996-10-29 Lion Corp 植物生理活性促進剤
JPH10218707A (ja) * 1997-02-13 1998-08-18 Lion Corp 土壌・植物散布液組成物
WO2009035413A1 (fr) * 2007-09-10 2009-03-19 National University Of Singapore Solution de chitosan et procédé de préparation
WO2012035364A1 (fr) * 2010-09-15 2012-03-22 Creogen D.O.O. Solution stabilisée d'acide ortho-silicique, sa préparation et son utilisation
CN107698352A (zh) * 2017-11-17 2018-02-16 广西北贸农牧有限公司 用于促进番石榴早熟的复合型液体肥料及其制备方法
CN109042853A (zh) * 2018-09-29 2018-12-21 山东祥维斯生物科技股份有限公司 用于叶类蔬菜或离土鲜花保鲜的非凝胶性保鲜剂

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08283104A (ja) * 1995-04-13 1996-10-29 Lion Corp 植物生理活性促進剤
JPH10218707A (ja) * 1997-02-13 1998-08-18 Lion Corp 土壌・植物散布液組成物
WO2009035413A1 (fr) * 2007-09-10 2009-03-19 National University Of Singapore Solution de chitosan et procédé de préparation
WO2012035364A1 (fr) * 2010-09-15 2012-03-22 Creogen D.O.O. Solution stabilisée d'acide ortho-silicique, sa préparation et son utilisation
CN107698352A (zh) * 2017-11-17 2018-02-16 广西北贸农牧有限公司 用于促进番石榴早熟的复合型液体肥料及其制备方法
CN109042853A (zh) * 2018-09-29 2018-12-21 山东祥维斯生物科技股份有限公司 用于叶类蔬菜或离土鲜花保鲜的非凝胶性保鲜剂

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GUMILAR TONY ABDILLAH, PRIHASTANTI ERMA, HARYANTI SRI, SUBAGIO AGUS, NGADIWIYANA .: "Utilization of Waste Silica and Chitosan as Fertilizer Nano Chisil to Improve Corn Production in Indonesia", ADVANCED SCIENCE LETTERS, vol. 23, no. 3, 1 March 2017 (2017-03-01), pages 2447 - 2449, XP055784408, ISSN: 1936-6612, DOI: 10.1166/asl.2017.8732 *
PERTAMININGSIH LOLITA DEWI, PRIHASTANTI ERMA, PARMAN SARJANA, SUBAGIO AGUS, NGADIWIYANA: "Application of Inorganic Fertilizer With NanoChisil and Nanosilica on Black Corn Plant Growth (Zea Mays L.)", JOURNAL OF PHYSICS: CONFERENCE SERIES, INSTITUTE OF PHYSICS PUBLISHING, GB, vol. 1025, 1 May 2018 (2018-05-01), GB, pages 012128, XP055784409, ISSN: 1742-6588, DOI: 10.1088/1742-6596/1025/1/012128 *

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