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    PROCESS FOR MANUFACTURING FORMULATIONS OF CHELATING AGENTS
    1.
    发明申请
    PROCESS FOR MANUFACTURING FORMULATIONS OF CHELATING AGENTS 审中-公开

    公开(公告)号：US20180118632A1

    公开(公告)日：2018-05-03

    申请号：US15572839

    申请日：2016-04-19

    Applicant: BASF SE

    Inventor： Benjamin NEHLS ,  Markus KLUMPE ,  Michael MAUSS ,  Klaus ECKERT

    IPC: C05D9/02 ,  C11D3/33 ,  C11D3/43 ,  C05D9/00 ,  C05G3/00

    CPC classification number: C05D9/02 ,  C05D9/00 ,  C05G3/0076 ,  C05G3/0082 ,  C11D3/33 ,  C11D3/43

    Abstract: Process for manufacturing a formulation of a chelating agent according to general formula (I): R1—CH(COOX1)—N(CH2COOX1)2, wherein R1 is selected from C1-C4-alkyl, linear or branched, phenyl, benzyl, CH2OH, and CH2CH2COOX1, X1 is (MxH1-x), M being selected from alkali metal, x is in the range of from 0.6 to 1, said formulation comprising in the range of from 0.01 to 20% by weight of water, and at least one organic solvent selected from alkanols with a boiling point at normal pressure that is higher than the boiling point of water, from alkandiols, alkantriols and polyols and mixtures of at least two of the foregoing, said process comprising the following steps: (a) providing an aqueous solution of chelating agent according to general formula (I), (b) adding said organic solvent and (c) removing the water completely or the majority of the water by distillation.

    Controlled release liquid fertilizers
    9.
    发明授权
    Controlled release liquid fertilizers 失效
    控释液体肥料

    公开(公告)号：UST969003I4

    公开(公告)日：1978-04-04

    申请号：US807842

    申请日：1977-06-20

    Applicant: John F. Phillips, Jr. ,  John J. Kohler

    Inventor： John F. Phillips, Jr. ,  John J. Kohler

    IPC: C05G3/00

    CPC classification number: C05G3/0041 ,  C05G3/00 ,  C05B7/00 ,  C05C1/00 ,  C05C9/00 ,  C05D1/02 ,  C05G3/0064 ,  C05G3/0082

    Abstract: liquid fertilizers having controlled release properties are prepared from fertilizer solutions and oil-surfactant mixtures. An invert surfactant is dissolved in an oil such as kerosene. The amount of surfactant used can vary over a wide range. Use of between 0.6 and 1.0 percent surfactant in the fertilizer formulation yields fertilizers with acceptable release rates. Liquid fertilizer is slowly added to the oil-surfactant mixture with vigorous agitation causing a water-in-oil emulsion to form. Mixtures containing 80 to 90 percent liquid fertilizer and 10 to 20 percent oil made excellent products.The final fertilizer product is an invert emulsion containing 80 to 90 percent liquid fertilizer, 10 to 20 percent oil, and 0.6 to 1.0 percent surfactant. The product consists of small droplets of liquid fertilizer solution surrounded by a thin but essential impenetrable oil-surfactant layer. Water slowly dissolves the surfactant from the oil, thus breaking the emulsion and allowing the liquid fertilizer to be released. Ammonium phosphate, ammonium polyphosphate, ammonium nitrate, potassium chloride, uran solutions, and mixtures thereof, may be used as liquid fertilizers.

    Sulfur encapsulation of fertilizers to provide controlled dissolution rates
    10.
    发明授权
    Sulfur encapsulation of fertilizers to provide controlled dissolution rates 失效
    硫酸盐对肥料的控制解散速率的增加

    公开(公告)号：US3576613A

    公开(公告)日：1971-04-27

    申请号：US3576613D

    申请日：1967-07-24

    Applicant: THIOKOL CHEMICAL CORP

    Inventor： FLEMING PAUL S

    IPC: C05G3/00 ,  C05C9/00

    CPC classification number: C05G3/0023 ,  C05G3/0082

    Abstract: CERTAIN FINELY DIVIDED POWDERS HAVE BEEN FOUND TO BE UNUSUALLY EFFECTIVE IN REDUCING THE CONTACT ANGLE BETWEEN THE SURFACE OF SOLID FERTILIZER PELLETS AND MOLTEN SULFUR, THE EFFECT OF WHICH PHENOMENON ALLOWS MOLTEN SULFUR TO "WET" THE SURFACE OF THE FERTILIZER PELLETS MORE EASILY, WHEN A THIN LAYER OF THE FINELY DIVIDED POWDER IS INTERPOSED BETWEEN THE FERTILIZER SURFACE AND THE MOLTEN SULFUR. BY USING A SMALL AMOUNT OF ONE OF THESE FINELY DIVIDED POWDERS AS A SUBCOATING IMMEDIATELY ADJACENT TO AND SURROUNDING EACH FERTILIZER PELLET, IT IS POSSIBLE TO PRODUCE SULFURENCAPSULATED FERTILIZER PELLETS ADAPTED FOR USE IN SOIL TO PROVIDE A CONTROLLED RELEASE OF THE FERTILIZER NUTRIENTS AT A RATE PREDETERMINED FOR THE METABOLIC NEEDS OF A PARTICULAR CROP PLANT, USING MUCH LESS SULFUR THAN WOULD BE REQUIRED TO ACHIEVE COMPARABLE RESULTS ABSENT THE POWDERSUBCOAT.

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