EP0918459A1 - Compositions a usage agricole contenant de l'acide glycolique - Google Patents

Compositions a usage agricole contenant de l'acide glycolique

Info

Publication number
EP0918459A1
EP0918459A1 EP97927364A EP97927364A EP0918459A1 EP 0918459 A1 EP0918459 A1 EP 0918459A1 EP 97927364 A EP97927364 A EP 97927364A EP 97927364 A EP97927364 A EP 97927364A EP 0918459 A1 EP0918459 A1 EP 0918459A1
Authority
EP
European Patent Office
Prior art keywords
composition
glycolic acid
agricultural
useful
irrigation
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Withdrawn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
EP97927364A
Other languages
German (de)
English (en)
Inventor
Boaz Shitzer
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
Publication of EP0918459A1 publication Critical patent/EP0918459A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00—Other inorganic fertilisers
    • C05D9/02—Other inorganic fertilisers containing trace elements
    • 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
    • A01N37/36—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 containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F11/00—Other organic fertilisers
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Definitions

  • the present invention relates generally to agricultural compositions containing glycolic acid as active ingredient. More specifically the present invention relates to glycolic acid containing compositions useful for controlling crop growth, including non soil crops, and for the maintenance of irrigation systems.
  • the said agricultural compositions are useful as fertilizers, exploiting unique characteristics of glycolic acid, such as its ability of chelating and its anti microbial activity.
  • These compositions are further useful in cleaning irrigation systems and in maintenance of these systems, exploiting the unique characteristics of glycolic acid, such as its low corrosiveness, its ability of chelating, its effective control of pH and its biodegradation.
  • micro growth in this invention includes crops grown on soil and non soil crops such as crops grown on synthetic plant beds and such as picked plants.
  • Macro elements The macro elements used in plant nutrition are mainly nitrogen (N), phosphates (P) and potassium (K). P elements are provided by costly fertilizers. The use of a low cost fertilizer such, as ammonium, is not effective because of its chemical nature which contributes to lowering phosphate availability.
  • Micro elements - micro elements are trace elements, provided in the plants nutrition, such as salts of magnesium, iron, molybdenum and calcium.
  • the known methods for micro element feeding are based on using chelating agents for creating a soluble solution available to the plant.
  • the conventional chelating agents used are mainly ethyl di amine tetra acetic acid (EDTA) derivatives such as EDDHMA or EDHA or citrate products. These agents are high molecular weight carrier molecules, they are inefficient in agricultural use and require a narrow pH spectrum. Furthermore, these chelating agents are not biodegradable - an important trait for agricultural compositions, and large quantities of the above mentioned salts and chelating agents are required, making this treatment very costly and unfriendly to the environment.
  • EDTA ethyl di amine tetra acetic acid
  • a preferable surrounding for crops is of a pH of about 5.5.
  • Such a slightly acidic environment is also preferable for the irrigation system since it helps to prevent formation of calcium deposits inside the irrigation lines.
  • mineral acids are used. These acids have a long term damaging effect both on the soil and on the watering systems. Salts like calcium phosphate or magnesium sulfate, used for achieving a stable pH level, are very difficult to elimination and are hazardous for the user and for the environment.
  • Control of contamination levels - Sterilization of the soil is commonly achieved by use of harmful chemicals applied to the soil, such as methyl bromide and formaldehyde.
  • harmful chemicals applied to the soil such as methyl bromide and formaldehyde.
  • the sterilization process requires a large quantity of chemicals which are hazardous for the user and for the environment.
  • Non soil plant beds are commonly sterilized by addition of biocides to the irrigation water through a separate system, requiring maintenance of separate systems.
  • Glycolic acid is an alpha hydroxy carboxylic acid of the general formula:
  • Glycolic acid has a unique combination of properties that make it adaptable and easy to handle: low corrosiveness, negligible volatile organic compounds (NOC), nonflammability, low odor , low toxicity, biodegradability and high water solubility.
  • NOC negligible volatile organic compounds
  • Glycolic acids' dual chemical functionality makes it a useful organic chemical intermediate.
  • glycolic acids' ability to chelate metal salts allots it many uses in household and industrial cleaning applications.
  • glycolic acid is listed for use as a cleaner in food processing equipment. It is marketed as an industrial cleaner for stainless steel boilers, heat exchangers etc. and is involved in many industrial processes because of its ability, by chelating, to prevent unwanted precipitates.
  • glycolic acid to have extensive anti microbial activity. It has indicated activity against E. Coli, Staphylococcus, Salmonella, Lysteria and against Mycobaterium Phei and Mycobaterium Smegmatis in dairy products, Gallionella Ferruginea in water wells and against mildew such as Asperillus fungus. It may be used as a disinfectant whereas 1-5% concentration kills in 60 seconds, and may be used as a preservative whereas 250-750 ppm concentration kills in 24 hours. Over the past few years, a new use for glycolic acid has emerged in personal care products as an exfoliate (removes the outer layer of dead skin cell). Many low priced cosmetics , such as hair care products, skin care and soap products containing glycolic acid are being prepared for marketing.
  • glycolic acid is a more efficient chelator and sanitizer than the reagents used in agriculture today, and it is more friendly to the environment. Therefor, the present invention provides a much cheaper, more effective and less hazardous method of controlling crop growth and maintenance of irrigation systems, than the methods known today.
  • the present invention relates to an agricultural composition, containing as an active ingredient glycolic acid, for controlling crop growth and for the maintenance of irrigation systems.
  • the said composition is an aqueous solution containing up to about 72% by weight glycolic acid comprising a mixture of glycolic acid and phosphoric acid and/or metal ion compounds.
  • the metal ions are preferably bivalent metal ions selected from: iron, zinc, copper, manganese, molybdenum, calcium, magnesium.
  • the agricultural composition of the present invention can be used as a fertilizer; it is useful in macro element nutrition and in micro element nutrition. This agricultural composition is also useful for controlling the pH level of the irrigation water and of a non soil bed and is useful as an antimicrobial or a bacteriostat.
  • the agricultural composition of the present invention is further useful in maintenance of irrigation systems by chelating calcium deposits, or the like, in the irrigation lines and by acting as an antimicrobial or a bacteriostat keeping the irrigation lines clean of alga and the like and sanitizing the soil.
  • the agricultural composition of the present invention is more effective in agricultural use, than the presently used compositions and it is easily biodegradable, thus it provides a cheap and "environment friendly" composition for agricultural use.
  • the present invention relates to agricultural compositions containing glycolic acid as an active ingredient, useful for controlling crop growth, also for non soil crops, and for maintenance of irrigation systems.
  • Glycolic acid has the following advantages, concerning these parameters: Glycolic acids' chelating capacity is five times that of EDTA derivatives and ten times that of citrate products. One molecule of glycolic acid will chelate one atom of bi valent metals, therefor small quantities of glycolic acid are required for chelating metal salts, reducing the cost of such compositions.
  • Glycolic acid also acts to control the inhibitory effect that ammonium has on phosphates, thus allowing the effective use of a low cost source of nitrogen (the ammonium).
  • Glycolic acid is more effective than mineral acids in controlling pH. Only 60% weight per volume is required for lowering the pH as opposed to higher amounts of sulfuric acid required for the same. Chelating of metal salts, using glycolic acid, can be achieved in a wide range of pH conditions, even as radical as pH 2 or 9.
  • Glycolic acid can act as a bacteriostat, eliminating the growth of any bacteria above a certain level. The same is true for eliminating the growth of alga and fungous.
  • glycolic acid provides continuous sanitation to the irrigation system and to the soil and crop. Using glycolic acid containing compositions maintains the presence of useful bacteria such as nitrification bacteria.
  • glycolic acid Due to its chelating properties glycolic acid is an effective cleaner of scale and salts from the irrigation systems.
  • Glycolic acid is readily biodegradable, decomposing to water and CO2 by bacteria present in the soil so that it is not hazardous to people or to the environment as are the other chemicals commonly used in agriculture.
  • glycolic acid in agriculture is beneficial for each of these above mentioned parameters and the combined effects of the glycolic acid further provide a method for maintenance of the irrigation systems.
  • Maintenance of the irrigation lines and controlling crop growth may be simultaneous, as the said compositions may be administered to the crops through the irrigation system, thereby allowing dual action of the glycolic acid on the pipes and on the crops, or the compositions may be applied to the irrigation lines and to the crops separately, or different compositions ( different glycolic acid concentration and /or different additions to the glycolic acid ) may be used in controlling crop growth and in maintenance of the irrigation systems.
  • Some examples of preferred embodiments of the present invention are as follows: Composition A material % in weight optimally glycolic acid 5 - 50 15% of a 70% stock phosphoric acid 5 - 20 15% of a 85% stock water (tap water) 90 - 30 70%
  • Composition A is a source of phosphate nutrition and has the following attributes: Potent pH control, control of precipitation of scale in the irrigation system, keeping it clean of plugs, chelation of metallic ions, such as calcium, that are present in irrigation water, making them available for the crop to consume, decreasing the formation of insoluble phosphate as a result of the presence of ammonium in the irrigating water, controlling bacteria growth.
  • the concentration of each of the acids is variable depending on the plant bed type, chemistry of the irrigation water and the specific needs of the plant.
  • Composition B is useful for micro element nutrition but not for control of pH levels or for control of bacteria growth. All the metallic ions in this composition are chelated by the glycolic acid. The unique character of this composition is its ability to keep the metallic ions in chelation in a wide spectrum of pH ( pH 3 to 10). Recommendations for the concentration of each metal and the interaction between the ions, were obtained from the Israeli Ministry of Agriculture.
  • Composition C is useful in non soil plant beds. This composition will perform as a pH controller, micro element chelator, a source of phosphates, a bacteriostat and an irrigation system cleaner. The exact dose of the composition should be with compliance to the pH demands of the plant bed. When the irrigation water is alkaline the metallic ions tend to precipitate, and their availability to the plant is lowered. Thus, the amount of metallic ions that are available to the plant is proportional to the alkalinity of the irrigating water. Bringing the pH of alkaline water to a level fit for plant growth requires a large amount of composition C. Using composition C the large amount of metallic ions will compensate for the poor availability of these elements when the irrigation water is alkaline.
  • Composition C supplies the plants with micro elements, controls pH levels, supplies phosphate and bacteriostat activity.
  • the only supplement needed for complete plant nutrition is a source of nitrogen and a source of potassium. This reduces the cost of fertilizing by 40%. Offering such a cost effective approach to low profit agriculture will make food production more attractive.
  • Composition D supplies the plants with micro elements, controls pH levels, supplies phosphate and bacteriostat activity. The only supplement needed for complete plant nutrition is a source of nitrogen and a source of potassium. This reduces the cost of fertilizing by 40%. Offering such a cost effective approach to low profit agriculture will make food production more attractive.
  • Composition D is useful for feeding iron to plants that do not need feeding of the other micro elements.
  • the low molecular weight glycolic acid acts as a potent chelator, thus lowering the cost of iron feeding of plants.
  • Composition E is useful with picked flowers, prolonging the life time of these flowers.
  • the combination between the glycolic acid and the copper ions results in a very potent biodegradable sanitizing mixture useful in prolonging picked flowers life time.
  • composition F contains glycolic acid in the right concentration together with a suitable biofilrn and is useful as a biocide. In the proper concentrations, composition F will eliminate alga, fungi and bacteria, in a very short time, without damaging the plant. This composition can be used to cure leaves, roots and plant bed diseases.
  • the said invention will be further illustrated by the following experiments. These experiments do not intend to limit the scope of the invention but to demonstrate and clarify it only.
  • Composition A was fed into the irrigation water of a nursery in the lower Golan Heights, Israel.
  • the plant bed in this nursery was grounded volcanic rock that contained a lot of iron and other micro elements such as zinc, mangan, copper etc.
  • the irrigation water was alkaline.
  • the irrigation system was clogged, there were a lot of chloretic plants as a result of insuficient iron and microelement nutrition and a lot of plants were dead as a result of root disease.
  • composition A adjusted to a pH of 5.5, was applied to the plant beds for a period of two weeks.
  • the results of the treatment with this composition were:
  • Composition B was applied to the plantation and after a period of ten days, a dramatic change took place in the plantation. As a result of the availability of micro elements to the trees a new healthy growth began after a year of no growth at all.
  • Composition C was applied to the plantation and after a period of ten days, a dramatic change took place in the plantation. As a result of the availability of micro elements to the trees a new healthy growth began after a year of no growth at all.
  • Composition C Composition C
  • Composition C was fed to irrigation water of an alkaline nature. This water was used to irrigate roses in a green house in which the plants were planted on synthetic plant beds. The pH of the water, before addition of composition C was 8. Addition of composition C brought the pH to 5.5. Composition C was supplemented only by KNO 3 and urea. After several weeks of application, the growth and well being of the plants was improved. The level of micro and macro elements in the plant bed and in the plants' leaves, increased and it was calculated that the cost of iron feeding of the plants was reduced by 40%.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Plant Pathology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Inorganic Chemistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Hydrology & Water Resources (AREA)
  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Fertilizers (AREA)

Abstract

Cette invention concerne des compositions à usage agricole qui contiennent de l'acide glycolique en qualité d'ingrédient actif. Ces compositions permettent de gérer la croissance des cultures et d'assurer l'entretien de systèmes d'irrigation. Dans un mode de réalisation préféré, cette composition consiste en une solution aqueuse qui contient jusqu'à 72 % en poids environ d'acide glycolique, et qui comprend un mélange d'acide glycolique et d'acide phosphorique et/ou de composés d'ions métalliques, de préférence des ions métalliques bivalents. La composition à usage agricole décrite dans la présente invention peut être utilisée en qualité d'engrais, ainsi qu'en qualité d'agent nutritif en macro-éléments et en micro-éléments. Cette composition peut également être utilisée en qualité d'agent anti-microbien, de bactériostatique, ou afin d'ajuster le niveau de pH de l'eau servant à l'irrigation, ainsi que celui de lits de culture hors sol. Cette composition est en outre utile dans l'entretien de systèmes d'irrigation car elle permet de chélater les dépôts de calcium, ou analogues, dans les conduites d'irrigation. Grâce à son action anti-microbienne et bactériostatique, elle permet de maintenir les conduites propres, notamment en ce qui concerne les algues ou analogues, et d'assainir les sols. La composition décrite dans cette invention est plus efficace dans le domaine agricole que les compositions actuellement utilisées. Elle est en outre facilement biodégradable, ce qui permet d'obtenir une composition à usage agricole peu coûteuse et qui ne nuit pas à l'environnement.
EP97927364A 1996-07-02 1997-06-30 Compositions a usage agricole contenant de l'acide glycolique Withdrawn EP0918459A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IL11878096A IL118780A0 (en) 1996-07-02 1996-07-02 Agricultural compositions containing glycolic acid
IL11878096 1996-07-02
PCT/IL1997/000219 WO1998000012A1 (fr) 1996-07-02 1997-06-30 Compositions a usage agricole contenant de l'acide glycolique

Publications (1)

Publication Number Publication Date
EP0918459A1 true EP0918459A1 (fr) 1999-06-02

Family

ID=11069040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97927364A Withdrawn EP0918459A1 (fr) 1996-07-02 1997-06-30 Compositions a usage agricole contenant de l'acide glycolique

Country Status (4)

Country Link
EP (1) EP0918459A1 (fr)
AU (1) AU720503B2 (fr)
IL (1) IL118780A0 (fr)
WO (1) WO1998000012A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2969128B1 (ja) * 1998-07-09 1999-11-02 株式会社エムアイテック キレート化合物含有肥料
US6124241A (en) * 1998-10-29 2000-09-26 Auxien Corporation Method for increasing plant productivity using glutamic acid and glycolic acid
US6331505B1 (en) 1998-10-29 2001-12-18 Emerald Bioagriculture Corporation Method for increasing plant productivity using glutamic acid and glycolic acid
US6432883B1 (en) * 2000-04-20 2002-08-13 Emerald Bioagriculture Corporation Methods of treating plants with glycolic acid
JP2005503324A (ja) * 2001-01-29 2005-02-03 アグリケア・リミテッド 植物病原体を防除するための方法および組成物
FR2836784A1 (fr) * 2002-03-11 2003-09-12 Serge Barbieux La composition chimique de traitement a base de sulfate de fer
US8513176B2 (en) 2006-08-02 2013-08-20 Ch2O Incorporated Disinfecting and mineral deposit eliminating composition and methods
US20080299222A1 (en) 2007-05-18 2008-12-04 Crudden Joseph J Bioactive agrichemical compositions and use thereof
US9295254B2 (en) 2011-12-08 2016-03-29 Sciessent Llc Nematicides

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Publication number Priority date Publication date Assignee Title
US3679392A (en) * 1969-06-18 1972-07-25 Union Oil Co Plant growth stimulated by a combination of glycolic acid and gibberellin
US3696040A (en) * 1970-01-16 1972-10-03 Champion Chem Inc Composition for removal of calcium sulfate deposits
JPS5612601B2 (fr) * 1974-03-08 1981-03-23
DE2714601C2 (de) * 1977-04-01 1984-12-06 Skw Trostberg Ag, 8223 Trostberg Verfahren zur Herstellung eines Harnstoff-Dicyandiamid-Düngemittels
JPS608995B2 (ja) * 1982-06-22 1985-03-07 多木化学株式会社 液体肥料
GB8514243D0 (en) * 1985-06-05 1985-07-10 Diversey Corp Water-dilutable disinfectant composition
JPH0641396B2 (ja) * 1987-03-30 1994-06-01 俊雄 増田 ケイ酸カリウム液体肥料の製造法
JP3162099B2 (ja) * 1991-04-30 2001-04-25 株式会社片山化学工業研究所 軟水ボイラの水処理法
ES2097296T3 (es) * 1991-07-15 1997-04-01 Cfpi Ind Composicion acida desinfectante con caracteristicas detergentes y desincrustantes y procedimiento para su fabricacion.

Non-Patent Citations (1)

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Title
See references of WO9800012A1 *

Also Published As

Publication number Publication date
AU720503B2 (en) 2000-06-01
IL118780A0 (en) 1996-10-31
WO1998000012A1 (fr) 1998-01-08
AU3189197A (en) 1998-01-21

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