GB1512637A - Vitreous controlled release fertiliser composition - Google Patents

Vitreous controlled release fertiliser composition

Info

Publication number
GB1512637A
GB1512637A GB33573/74A GB3357374A GB1512637A GB 1512637 A GB1512637 A GB 1512637A GB 33573/74 A GB33573/74 A GB 33573/74A GB 3357374 A GB3357374 A GB 3357374A GB 1512637 A GB1512637 A GB 1512637A
Authority
GB
United Kingdom
Prior art keywords
fertilizer
glass
matrix
water
vitreous
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.)
Expired
Application number
GB33573/74A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB33573/74A priority Critical patent/GB1512637A/en
Publication of GB1512637A publication Critical patent/GB1512637A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
    • 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
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/16—Silica-free oxide glass compositions containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/0035—Compositions for glass with special properties for soluble glass for controlled release of a compound incorporated in said glass

Abstract

1512637 Vitreous fertilizer STANDARD TELEPHONES & CABLES Ltd 29 July 1975 [30 July 1974] 33573/74 Headings C1M and C1B A particulate fertilizer comprises a vitreous matrix including P 2 O 5 as a glass-forming oxide and modifying oxides selected from alkali metal and alkaline earth metal oxides and including at least one of K 2 O, CaO and MgO, the matrix incorporating nitrogen as calcium cyanamide, and the matrix being soluble in water so that, on immersion in water, the constituents are slowly released into solution. The glass may consist of, in mole per cent, K 2 O 10-35,CaO+MgO 18-50 and P 2 O 5 37-55. The calcium cyanamide may be added as powder to molten glass at, e.g., about 800‹C. in N 2 . The calcium cyanamide particles may initially be coated with a metaphosphate glass of lower softening point than the matrix glass. The fertilizer may be heated to below the glass softening point and exposed to boric oxide vapour to form a boron phosphate surface layer (e.g. 0À1-1Á in thickness), so that the fertilizer, when immersed in water, has an induction period before the nutrient release period, in which induction period little or no nutrient is released. Optional ingredients of the fertilizer include fungicides and trace nutrient elements (so that deficiency diseases in livestock are treated by fertilizing the animal's fodder). The fertilizer may be used, instead of applying it to soil, to treat water used in hydroponic plant growth.
GB33573/74A 1975-07-29 1975-07-29 Vitreous controlled release fertiliser composition Expired GB1512637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB33573/74A GB1512637A (en) 1975-07-29 1975-07-29 Vitreous controlled release fertiliser composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33573/74A GB1512637A (en) 1975-07-29 1975-07-29 Vitreous controlled release fertiliser composition

Publications (1)

Publication Number Publication Date
GB1512637A true GB1512637A (en) 1978-06-01

Family

ID=10354696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33573/74A Expired GB1512637A (en) 1975-07-29 1975-07-29 Vitreous controlled release fertiliser composition

Country Status (1)

Country Link
GB (1) GB1512637A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009338A1 (en) * 1978-09-26 1980-04-02 International Standard Electric Corporation Glass composition
EP0013077A2 (en) * 1978-12-21 1980-07-09 International Standard Electric Corporation Glass composition and its use in a therapeutic composition, in a subcutaneous implant or in a fertilizer, algicide, fungicide, or molluscicide
EP0024891A1 (en) * 1979-08-30 1981-03-11 International Standard Electric Corporation Process for liberating metal ions from a water soluble glass at a controlled rate
US4334908A (en) * 1978-09-29 1982-06-15 Bfg Glassgroup Vitreous fertilizer compositions
EP0080330A2 (en) * 1981-11-18 1983-06-01 Stc Plc Composite materials
EP0168936B1 (en) * 1984-07-18 1988-04-20 Stc Plc Water soluble compositions for preparing analytical solutions
WO1993019596A1 (en) * 1992-03-28 1993-10-14 Borden (Uk) Limited Dispersible products
CN114644457A (en) * 2020-12-18 2022-06-21 宁波书通科技有限公司 Slow release fertilizer for soilless culture

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009338A1 (en) * 1978-09-26 1980-04-02 International Standard Electric Corporation Glass composition
US4334908A (en) * 1978-09-29 1982-06-15 Bfg Glassgroup Vitreous fertilizer compositions
EP0013077A2 (en) * 1978-12-21 1980-07-09 International Standard Electric Corporation Glass composition and its use in a therapeutic composition, in a subcutaneous implant or in a fertilizer, algicide, fungicide, or molluscicide
EP0013077A3 (en) * 1978-12-21 1980-10-01 International Standard Electric Corporation Glass composition and its use in a therapeutic composition, in a subcutaneous implant or in a fertilizer, algicide, fungicide, or molluscicide
EP0024891A1 (en) * 1979-08-30 1981-03-11 International Standard Electric Corporation Process for liberating metal ions from a water soluble glass at a controlled rate
EP0080330A2 (en) * 1981-11-18 1983-06-01 Stc Plc Composite materials
EP0080330A3 (en) * 1981-11-18 1983-07-13 Standard Telephones And Cables Public Limited Company Composite materials
EP0168936B1 (en) * 1984-07-18 1988-04-20 Stc Plc Water soluble compositions for preparing analytical solutions
WO1993019596A1 (en) * 1992-03-28 1993-10-14 Borden (Uk) Limited Dispersible products
CN114644457A (en) * 2020-12-18 2022-06-21 宁波书通科技有限公司 Slow release fertilizer for soilless culture

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee