WO2000024731A1 - Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal - Google Patents
Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal Download PDFInfo
- Publication number
- WO2000024731A1 WO2000024731A1 PCT/US1998/022256 US9822256W WO0024731A1 WO 2000024731 A1 WO2000024731 A1 WO 2000024731A1 US 9822256 W US9822256 W US 9822256W WO 0024731 A1 WO0024731 A1 WO 0024731A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aliphatic
- alcohol
- azadirachtin
- liquid
- aliphatic hydrocarbon
- Prior art date
Links
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
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
-
- 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
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
- A01N65/26—Meliaceae [Chinaberry or Mahogany family], e.g. mahogany, langsat or neem
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P33/00—Antiparasitic agents
- A61P33/02—Antiprotozoals, e.g. for leishmaniasis, trichomoniasis, toxoplasmosis
- A61P33/06—Antimalarials
Definitions
- AZADIRACHTIN COMPOUNDS EXTRACTED FROM AZADIRACHTA INDICA, COMPOSITIONS AND USE THEREOF AS INSECTICIDAL
- the invention relates to shelf life stable, insect repellent, insect growth regulator and insecticidal formulations having an azadirachtin content ranging between 0.3 to 4%, technical azadirachtin composition of high purity and methods for preparing same.
- the impurities removed by the claimed process have a destabilising affect on the active ingredient.
- Another object of the instant invention is to provide a process for preparing shelf stable azadirachtin formulations which are easily dispersible in water, have a high concentration of active ingredient and are stable on storage as well as when applied to plants comprising glycols or diols as solvent.
- Azadirachtin formulations in the novel glycol or diol solvent have better dispersibility. When suspended in water, the formulation provides for longer retention at the leaf surface thus providing enhanced efficacy. Moreover, the instant formulations are devoid of phytotoxicity encountered with other formulations.
- the instant invention provides for a multistep method for purifying azadirachtin from neem seeds and compositions of extended shelf life.
- extended shelf life is meant to indicate that on storage at ambient conditions, generally in an air-tight container at 25°C, a composition of the instant invention retains 90% or more azadirachtin activity after at least a 12-month storage period.
- the seeds of the neem tree are the starting material.
- the neem seeds can be dried and stored at temperatures not below 10°C and not exceeding 35°C.
- the seeds can be stored for up to a year before processing.
- the seeds, fresh or dried, are pulverized to a size of about 0.25 mm in diameter in preparation of the extraction procedure.
- the pulverizing step should not take place more than 1 day before extraction is to ensue.
- the size of the particles is not overly critical, from 0.25 mm in diameter to about 0.5 mm in diameter is suitable.
- the pulverized neem fruit is soaked in a hydroxylie solvent, such as an aliphatic monohydroxylated alcohol.
- a hydroxylie solvent such as an aliphatic monohydroxylated alcohol.
- the aliphatic monohydroxylate alcohol has a size from 1 to about 8 carbon atoms and preferably from 1 to about 4 carbon atoms.
- Suitable alcohols include methanol, ethanol, isopropanol and butanol, with methanol preferred.
- At least a 1:2 ratio, by weight, of neem to aliphatic monohydroxylated alcohol is used.
- the mixture is agitated continuously over a period of at least ten hours at a temperature at least at room temperature and not exceeding 50°C.
- the mixture then is separated by known means, such as centrifugation, filtration or mere decanting.
- the liquid phase is collected and concentrated, for example, by evaporation or, more quickly under vacuum, to provide a neem extract concentrate.
- the separation and concentration steps of the neem extract should be conducted at a temperature of at least room temperature and not exceeding 45°C.
- the resulting concentrate then is mixed with continuous stirring for at least two hours at a temperature of 30-35°C with a halogenated aliphatic hydrocarbon solvent at a ratio of at least 1:2 - 1:3, on a weight basis.
- Suitable halogenated aliphatic hydrocarbons are chlorinated. Examples include dichloromethane, dichloroethane, chloroform, tr ichloroethy lene and dichloropropane . Dichloromethane is a preferred solvent.
- the lower layer containing insoluble material including gums and resins and other impurities soluble in known solvents, such as ethyl acetate, is removed, for example, by filtration using known materials and methods.
- the extract is washed with water. An equal volume of water is added to the halogenated aliphatic hydrocarbon solution and slowly stirred for about fifteen minutes. Then the mixture is allowed to sit, without stirring for about 30 minutes. The lower organic phase is removed. The process can be repeated and preferably at least once more.
- the washing step is conducted at a temperature between 25 - 35°C.
- the organic layer is recovered and distilled.
- a preferred method is to distill the solvent under atmospheric pressure until about 90% of the solvent is removed.
- the balance of the solvent can be removed under reduced pressure at a temperature between 20 - 40°C.
- the syrupy residue is mixed with at least eight and not more than twelve volumes of aliphatic hydrocarbon solvent, such as hexane, octane or isooctane. Hexane is preferred.
- the residue is added slowly to stirred aliphatic hydrocarbon, at 25 - 30°C over a period of about 2 - 2.5 hours. The mixture is stirred for at least another thirty hours.
- Technical azadirachtin remains insoluble and is removed, for example, by decanting or passage of the solution through a Nutsch filter.
- the liquid phase contains other recoverable products, such as neem oil and salanin.
- the solid product is dried, generally in a vacuum drier at a temperature no higher than about 40 - 45°C and a pressure of about 600 mm Hg to yield the technical azadirachtin product of 10-25% purity with less than 0.5% retained moisture.
- the technical azadirachtin obtained by the above-described process then can be dissolved in a aliphatic dihydroxylated alcohol solvent comprising at least 80%, by volume, and preferably 90% or more of the final preparation, at the desired concentration.
- Suitable aliphatic dihydroxylated alcohols include propylene glycol and other dihydroxylated alcohols of greater than two carbon atoms.
- a 0.3% active ingredient composition can be obtained by adding 30 grams of technical azadirachtin of 10% purity to a suitable amount of propylene glycol to yield a final volume of one liter.
- the dihydroxylated alcohol formulation can contain other non-critical excipients, such as, emulsifiers, surfactants, sunscreens, antioxidants and the like.
- Suitable additives include detergents and p-aminobenzoic acid. The amounts of such additives can vary according to the desired characteristics of the final preparation, cost and the like. Thus a suitable concentration of emulsifier is from 3 - 8%, of surfactant is from 0.5 - 4% and of sunscreens or antioxidants is from 0.1 - 1%.
- a sample formulation contains 5% emulsifier, 2% surfactant and 0.5% sunscreen/antioxidant.
- the above technical azadirachtin can be purified further by dissolving the dried product in about 2- t 3 times the volume of aliphatic monohydroxylated alcohol, such as methanol as described hereinabove, at a temperature from room temperature to about 30 - 35°C. Then four times the volume of added alcohol of water is added and mixed to form a slurry. The slurry is incubated for about two hours with stirring. The liquid phase is obtained, such as by filtration, and concentrated, as described hereinabove.
- aliphatic monohydroxylated alcohol such as methanol as described hereinabove
- a halogenated aliphatic hydrocarbon such as dichloromethane, essentially as described hereinabove, is added to extract the aqueous layer and the organic layer is removed.
- the organic layer is washed with water, as discussed hereinabove, and the remaining steps as described hereinabove following mixing with the halogenated hydrocarbon are practiced to derive a dried product of higher purity, generally of about 40% purity.
- Eighteen tons of neem fruit are depulped, destoned, dried (9 tons) and stored in silos at temperatures not exceeding 35°C.
- the seeds are decorticated and pulverised a day in advance for processing.
- the pulverised kernels (3 tons) of 0.25 mm thickness are soaked in methanol (12 tons) for 10 hrs and passed through a decanter to separate the solid & liquid phases.
- the methanolic extract is concentrated under vacuum initially in a falling film evaporator and finally in an agitated thin film evaporator to recover 95% methanol.
- the concentrate is treated with dichloromethane
- the product thus obtained is devoid of oil waxes, gums, protein and water which have phytotoxicity and have a destabilising influence in storage of formulations as well as technical product.
- azadirachtin insecticidal formulations of the instant invention contain more than 90% glycol or diol solvent with or without sunscreens and antioxidants. No emulsifier is added since natural emulsifier from seeds is adequate.
- the formulation is prepared by dissolving 75 grams of azadirachtin technical (40-42% purity) made up to 1 litre with propylene glycol and p-amino benzoic acid (10 gms) , stirring for 30 min and filtering to eliminate particulate matter before filling.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Natural Medicines & Medicinal Plants (AREA)
- Agronomy & Crop Science (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Plant Pathology (AREA)
- Dentistry (AREA)
- Pest Control & Pesticides (AREA)
- Mycology (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Tropical Medicine & Parasitology (AREA)
- Veterinary Medicine (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Organic Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/401,242 US5827521A (en) | 1995-03-09 | 1995-03-09 | Shelf stable insect repellent, insect growth regulator and insecticidal formulations prepared from technical azadirachtin isolated from the kernel extract of Azadirachta indica |
PCT/US1998/022256 WO2000024731A1 (en) | 1995-03-09 | 1998-10-26 | Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal |
ES98956129T ES2268798T3 (en) | 1995-03-09 | 1998-10-26 | COMPOSITION OF AZADIRACTIN, INDIAN AZADIRACTIN EXTRACTS, COMPOSITIONS AND ITS USES AS INSECTICIDES. |
EP98956129A EP1124818B1 (en) | 1995-03-09 | 1998-10-26 | Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal |
CA002348579A CA2348579C (en) | 1995-03-09 | 1998-10-26 | Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal |
AU12722/99A AU766956B2 (en) | 1995-03-09 | 1998-10-26 | Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal |
DE69835036T DE69835036D1 (en) | 1995-03-09 | 1998-10-26 | AZADIRACHTIN COMPOUNDS EXTRACTS FROM AZADIRACHTA INDICA, COMPOSITIONS AND ITS USE AS INSECTICIDES |
MXPA01004156A MXPA01004156A (en) | 1995-03-09 | 1998-10-26 | Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/401,242 US5827521A (en) | 1995-03-09 | 1995-03-09 | Shelf stable insect repellent, insect growth regulator and insecticidal formulations prepared from technical azadirachtin isolated from the kernel extract of Azadirachta indica |
PCT/US1998/022256 WO2000024731A1 (en) | 1995-03-09 | 1998-10-26 | Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000024731A1 true WO2000024731A1 (en) | 2000-05-04 |
Family
ID=26794446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/022256 WO2000024731A1 (en) | 1995-03-09 | 1998-10-26 | Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal |
Country Status (8)
Country | Link |
---|---|
US (1) | US5827521A (en) |
EP (1) | EP1124818B1 (en) |
AU (1) | AU766956B2 (en) |
CA (1) | CA2348579C (en) |
DE (1) | DE69835036D1 (en) |
ES (1) | ES2268798T3 (en) |
MX (1) | MXPA01004156A (en) |
WO (1) | WO2000024731A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5827521A (en) * | 1995-03-09 | 1998-10-27 | Fortune Biotech Limited | Shelf stable insect repellent, insect growth regulator and insecticidal formulations prepared from technical azadirachtin isolated from the kernel extract of Azadirachta indica |
US6733802B1 (en) | 1997-12-17 | 2004-05-11 | Fortune Bio-Tech Limited | Natural azadirachtin composition |
US6811790B1 (en) | 2000-03-27 | 2004-11-02 | E.I.D. Parry (India) Ltd. | Storage stable pesticide formulations containing azadirachtin |
US6340484B1 (en) | 2000-04-07 | 2002-01-22 | E.I.D. Parry (India) Limited | Compositions containing neem seed extracts and saccharide |
GB2369072A (en) * | 2000-10-16 | 2002-05-22 | Neem Biotech Ltd | Extraction of azadirachtin from neem seeds |
ES2410261B1 (en) | 2009-03-06 | 2014-04-28 | Antonio NÚÑEZ JARAMILLO | PROCEDURE FOR RECYCLING AND ASSESSMENT OF ORGANIC WASTE PRODUCED IN KITCHENS IN NEIGHBORHOOD COMMUNITIES, BY PREFABRICATED BIOGAS PLANTS TO PRODUCE ELECTRICITY AND PAYMENT. |
BR102013021210B1 (en) | 2013-01-25 | 2015-12-01 | Fundação Universidade Fed De São Carlos | process of obtaining biopolymeric nanoparticles containing oil and azadirachta extracts indicates a. juss (neem), biopolymer nanoparticles and powder microparticles |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5827521A (en) * | 1995-03-09 | 1998-10-27 | Fortune Biotech Limited | Shelf stable insect repellent, insect growth regulator and insecticidal formulations prepared from technical azadirachtin isolated from the kernel extract of Azadirachta indica |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4556562A (en) * | 1984-03-19 | 1985-12-03 | Vikwood, Ltd. | Stable anti-pest neem seed extract |
US4943434A (en) * | 1987-10-06 | 1990-07-24 | Rohm And Haas Company | Insecticidal hydrogenated neem extracts |
US4946681A (en) * | 1989-06-26 | 1990-08-07 | W. R. Grace & Co.-Conn. | Method to prepare an improved storage stable neem seed extract |
US5001146A (en) * | 1989-06-26 | 1991-03-19 | W. R. Grace & Co.-Conn. | Storage stable azadirachtin formulation |
US5368856A (en) * | 1989-12-26 | 1994-11-29 | W. R. Grace & Co.-Conn. | Hydrophobic extracted neem oil-a novel fungicide use |
US5391779A (en) * | 1992-07-27 | 1995-02-21 | Rohm And Haas Company | Stable extracts from neem seeds |
US5352697A (en) * | 1992-07-28 | 1994-10-04 | Agridyne Technologies, Inc. | Storage stable pesticide compositions comprising azadirachtin and epoxide |
US5397571A (en) * | 1993-03-25 | 1995-03-14 | W. R. Grace & Co.-Conn. | Co-extraction of azadirachtin and neem oil |
IN179008B (en) * | 1995-07-17 | 1997-08-09 | Dalmia Ct For Biotechnology | |
IN184305B (en) * | 1995-10-19 | 2000-08-05 | Council Scient Ind Res |
-
1995
- 1995-03-09 US US08/401,242 patent/US5827521A/en not_active Expired - Lifetime
-
1998
- 1998-10-26 WO PCT/US1998/022256 patent/WO2000024731A1/en active IP Right Grant
- 1998-10-26 DE DE69835036T patent/DE69835036D1/en not_active Expired - Lifetime
- 1998-10-26 AU AU12722/99A patent/AU766956B2/en not_active Expired
- 1998-10-26 EP EP98956129A patent/EP1124818B1/en not_active Expired - Lifetime
- 1998-10-26 CA CA002348579A patent/CA2348579C/en not_active Expired - Lifetime
- 1998-10-26 ES ES98956129T patent/ES2268798T3/en not_active Expired - Lifetime
- 1998-10-26 MX MXPA01004156A patent/MXPA01004156A/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5827521A (en) * | 1995-03-09 | 1998-10-27 | Fortune Biotech Limited | Shelf stable insect repellent, insect growth regulator and insecticidal formulations prepared from technical azadirachtin isolated from the kernel extract of Azadirachta indica |
Also Published As
Publication number | Publication date |
---|---|
CA2348579A1 (en) | 2000-05-04 |
EP1124818B1 (en) | 2006-06-21 |
AU766956B2 (en) | 2003-10-30 |
ES2268798T3 (en) | 2007-03-16 |
US5827521A (en) | 1998-10-27 |
AU1272299A (en) | 2000-05-15 |
DE69835036D1 (en) | 2006-08-03 |
EP1124818A4 (en) | 2001-11-28 |
EP1124818A1 (en) | 2001-08-22 |
CA2348579C (en) | 2009-03-24 |
MXPA01004156A (en) | 2003-06-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5695763A (en) | Method for the production of storage stable azadirachtin from seed kernels of the neem tree | |
US4352746A (en) | Process for the production of oxidation-inhibiting substances | |
US4946681A (en) | Method to prepare an improved storage stable neem seed extract | |
EP0480077A1 (en) | Process for obtaining carnosic acid | |
US6572915B1 (en) | Process for enriching foods and beverages | |
JP3369413B2 (en) | Method for producing azadirachtin powder and method for producing emulsifiable concentrate containing the powder | |
IL106333A (en) | Stable extracts from neem seeds | |
CA2348579C (en) | Azadirachtin compounds extracted from azadirachta indica, compositions and use thereof as insecticidal | |
EA016246B1 (en) | Method for extracting secoisolariciresinol and dihydroquercetin from wood | |
Dupuy et al. | The isolation of a material capable of producing experimental lathyrism | |
US6265593B1 (en) | Process for solvent extraction of hydrophobic compounds | |
EP0026559B1 (en) | Liquid carbon dioxide extraction of pyrethrins and a purified pyrethrin composition | |
USH1541H (en) | Method for producing azadirachtin concentrates from neem seed materials | |
KR100979224B1 (en) | Compositions Containing Stabilized Chlorophyll ? | |
US5736145A (en) | Process for preparing purified Azadirachtin in powder form from neem seeds and storage stable aqueous composition containing Azadirachtin | |
US5989429A (en) | Processes for forming stabilized liquid biochemical agricultural products | |
EP0834254B1 (en) | Azadirachtin formulations and a process for preparing them from neem seed/kernel | |
KR20050039283A (en) | Extracting method of fucoxanthin using brown algae | |
US6855351B2 (en) | Pesticide formulation containing azadirachtin (not less than 300 ppm) and salanin in a formulated product with neem oil | |
JPS6124393B2 (en) | ||
JPS5899475A (en) | Separation of tocopherol and tocotrienol | |
JPS6363754A (en) | Method of separating carotene | |
US2899360A (en) | Extraction of vitamin b | |
PL237088B1 (en) | Method for obtaining extract from onion peel and the extract from onion peel obtained by this method | |
CA1177088A (en) | Method for the extraction of silymarin from plants |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
ENP | Entry into the national phase |
Ref document number: 2348579 Country of ref document: CA Kind code of ref document: A Ref document number: 2348579 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: PA/a/2001/004156 Country of ref document: MX Ref document number: 12722/99 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1998956129 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1998956129 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWG | Wipo information: grant in national office |
Ref document number: 12722/99 Country of ref document: AU |
|
WWG | Wipo information: grant in national office |
Ref document number: 1998956129 Country of ref document: EP |