Nitrification Inhibition Patents (Class 71/902)
  • Patent number: 8419819
    Abstract: A solid urea fertilizer prepared by mixing a solid, flowable, urea formaldehyde polymer with a urea source, such as molten or solid urea to form a fertilizer that has favorable crush strength characteristics, low biuret content, and/or desirable storage and handling properties. The urea fertilizer may contain additionally, an aqueous urea formaldehyde solution or mixture. Optionally, the fertilizer may contain a urease inhibitor and/or a nitrification inhibitor.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: April 16, 2013
    Assignee: Koch Agronomic Services, LLC
    Inventor: Allen R. Sutton
  • Patent number: 8163058
    Abstract: A method of producing reduced volatility of urea fertilizers comprising: dissolving N-(n-butyl)-thiophosphoric triamide (NBPT) in an amino alcohol having the formula 1—(H)x—N—((CH2)m—OH)n where m is 1-3, x is 0 or 1, and n is 2 when x is 1 and 3 when x is 0: or the formula 2—(H)y—N—((CH2)—CHOH—CH3)z such that the length of the carbon chain where the secondary hydroxyl group is located is 3, y is 0 or 1, and z is 2 when y is 1 and 3 when y is 0 to form an NBPT solution; and combining a urea fertilizer in granular or liquid form with the NBPT solution.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: April 24, 2012
    Assignee: Whitehurst Associates, Inc.
    Inventors: Garnett B. Whitehurst, Brooks M. Whitehurst
  • Patent number: 8133294
    Abstract: Reduced volatility of urea fertilizers are prepared in accordance with the present invention by first preparing an N-(n-butyl)-thiophosphoric triamide (NBPT) solution by dissolving NBPT in a mixture of an amino alcohol having the formula 1—(H)x—N—((CH2)m—OH)n where m is 1-3, x is 0 or 1, and n is 2 when x is 1 and 3 when x is 0: or the formula 2—(H)y—N—((CH2)—CHOH—CH3)z such that the length of the carbon chain where the secondary hydroxyl group is located is 3, y is 0 or 1, and z is 2 when y is 1 and 3 when y is 0, and a carboxylic acid having 6 or fewer carbon atoms. The solution is then combining with a urea fertilizer in granular or liquid form.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: March 13, 2012
    Assignee: Whitehurst Associates, Inc.
    Inventors: Garnett B. Whitehurst, Brooks M. Whitehurst
  • Patent number: 8075659
    Abstract: The invention relates to preparations with improved urease-inhibitory effect which comprise at least two different (thio)phosphoric triamides and to urea-comprising fertilizers which comprise these preparations. The invention furthermore relates to a method of preparing these preparations, to the use of these preparations in the fertilization with urea-comprising fertilizers, and to the use of urea-comprising fertilizers which comprise these preparations in agriculture or in horticulture.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: December 13, 2011
    Assignee: BASF SE
    Inventors: Alexander Wissemeier, Patrick Deck, Oliver Huttenloch, Michael Mauβ, Gregor Pasda, Ralf-Thomas Rahn, Wolfgang Weigelt, Wolfram Zerulla
  • Patent number: 8048189
    Abstract: Reduced volatility of urea fertilizers are prepared in accordance with the present invention by first preparing an N-(n-butyl)-thiophosphoric triamide (NBPT) solution by dissolving NBPT in a mixture of an amino alcohol having the formula 1—(H)x—N—((CH2)m—OH)n where m is 1-3, x is 0 or 1, and n is 2 when x is 1 and 3 when x is 0: or the formula 2—(H)y—N—((CH2)—CHOH—CH3)z such that the length of the carbon chain where the secondary hydroxyl group is located is 3, y is 0 or 1, and z is 2 when y is 1 and 3 when y is 0, and a carboxylic acid having 6 or fewer carbon atoms. The solution is then combining with a urea fertilizer in granular or liquid form.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: November 1, 2011
    Assignee: Whitehurst Associates Inc.
    Inventors: Garnett B. Whitehurst, Brooks M. Whitehurst
  • Patent number: 6488734
    Abstract: The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: December 3, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Barth, Norbert Rieber, Randall Evan Gold, Jürgen Dressel, Klaus Erhardt, Klaus Horchler von Locquengh, Edgar Leibold, Stefan Rittinger
  • Patent number: 6336949
    Abstract: A novel composition for a slow release nitrogenous fertilizer comprising about 0.5-1% of an inert material, 0.5-1% of essential oil or their derivatives on w/w basis and process for the preparation of the composition.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: January 8, 2002
    Assignee: Council of Scientific & Industrial Research
    Inventors: Dharani Dhar Patra, Usha Kiran, Aparbal Singh, Krishna Kumar Agarwal, Suman Preet Singh Khanuja, Mohammad Anwar, Sushil Kumar
  • Patent number: 6331198
    Abstract: The invention provides a synergistic composition useful as a nitrification inhibiting additive for ammonium producing fertilizers which comprises: (a) benzotriazole in the range of 2.5 to 50% (by wt % of the ammonium fertilizer), (b) metal chelating agent (cooper/nickel in the range from about 1 to 50% (by wt % of the ammonium) and ion binding compound and precursors and fertilizer.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: December 18, 2001
    Assignee: Council of Scientific & Industrial Research
    Inventors: Krishnamurthy Puttan, Nadur Muddanna Nanje Gowda, Eranki Venkata Surya Prakasa Rao, Sushil Kumar
  • Patent number: 6139596
    Abstract: The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: October 31, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Barth, Norbert Rieber, Randall Evan Gold, Jurgen Dressel, Klaus Erhardt, Klaus Horchler von Locquengh, Edgar Leibold, Stefan Rittinger
  • Patent number: 6066190
    Abstract: This patent describes nitrification inhibitors characterized by the fact that they contain as their active ingredients 1-hydro-1,2,4-triazole, a substituted 1-hydro-1,2,4-triazole, or their salts or metallic complexes, plus at least one other chemical compound, such as a substituted pyrazole, or its salts or metallic complexes, dicyanodiamide, guanyl thiocarbamide, thiocarbamide, ammonium rhodanide, or ammonium thiosulfate, where said combination exhibit readily recognizable synergetic effects compared to the case where said chemical compounds are employed alone, and thus provide benefits in terms of better efficacies, reduced dosages, and/or cost savings.
    Type: Grant
    Filed: January 5, 1999
    Date of Patent: May 23, 2000
    Assignee: SKW Stickstoffwerke
    Inventors: Margrit Grabarse, Sieghard Lang, Hans-Jurgen Michel, Hartmut Wozniak
  • Patent number: 5951736
    Abstract: This patent describes nitrification inhibitors characterized by the fact that they contain as their active ingredients 1-hydro-1,2,4-triazole, a substituted 1-hydro-1,2,4-triazole, or their salts or metallic complexes, plus at least one other chemical compound, such as a substituted pyrazole, or its salts or metallic complexes, dicyanodiamide, guanyl thiocarbamide, thiocarbamide, ammonium rhodanide, or ammonium thiosulfate, where said combinations exhibit readily recognizable synergetic effects compared to the case where said chemical compounds are employed alone, and thus provide benefits in terms of better efficacies, reduced dosages, and/or cost savings.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: September 14, 1999
    Assignee: SKW Stickstoffwerke Piesteritz GmbH
    Inventors: Margrit Grabarse, Sieghard Lang, Hans-Jurgen Michel, Hartmut Wozniak
  • Patent number: 5741345
    Abstract: This patent describes nitrification inhibitors characterized by the fact that they contain as their active ingredients a substituted pyrazole, or a salt or metallic complex thereof, dicyanodiamide, and one of the compoundsammonium thiosulfate,biguanide, orammonium rhodanide. The combinations of the present invention are more efficacious than the individual ingredients alone and binary combinations of the same ingredients, and are thus superior to same from the ecological, phytotoxicity, and cost-effectiveness stand-points, as well as in terms of their tendencies to form undesirable residues.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: April 21, 1998
    Assignee: SKW Stickstoffwerke Piesteritz GmbH
    Inventors: Margrit Grabarse, Sieghard Lang, Hans-Jurgen Michel, Hartmut Wozniak
  • Patent number: 5698003
    Abstract: Improved solvent systems for the formulation of N-alkyl thiophosphoric triamide urease inhibitors. These formulations enable the preparation of stable concentrated solutions of N-alkyl thiophosphoric triamides for storage, transportation, and eventual impregnation onto solid urea containing fertilizers and incorporation into liquid urea containing fertilizer compositions. These formulations are comprised primarily of a solvent selected from the group consisting of glycols and glycol derivatives. Optionally, in addition to the glycol base solvent, the formulations can contain a co-solvent selected from the group consisting of liquid amides, 2-pyrrolidone and N-alkyl 2-pyrrolidones, and/or a nonionic surfactant selected from the group consisting of alkylaryl polyether alcohols. The presence of the co-solvent and/or surfactant has been found to impart desirable properties to the formulations under certain conditions.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: December 16, 1997
    Assignee: IMC-Agrico Company
    Inventors: Barry A. Omilinsky, Alexander D. Lindsay, Allen R. Sutton, Willis L. Thornsberry, Jr.
  • Patent number: 5637131
    Abstract: It is the object of the present invention to develop agent combinations having an improved synergistic effect with regard to the inhibition or control of ammonium nitrogen nitrification.It was unexpectedly found that agent combinations which consist of at least one compound of the general formula ##STR1## with M with n=1 and greater than 1--in case of coordination compounds--standing for several mono- and multivalent metal ions, but being negated with n=0 in case of metal salts of substituted pyrazoles,A being the counterion in case of anion complexes and pyrazolates, preferably ammonium, alkali and alkaline earth, the 3-methyl pyrazolium cation in case of anion complexes and additionally Fe and Al in case of metal salts; b being in the range of 0 to 4,X being the same or different and embodying several mono- and multivalent inorganic or organic anions with q=0 to 6,R.sub.1 being hydrogen, methyl or halogen andZ representing hydrogen, CONH.sub.2, CNHNH.sub.2 or CSNH.sub.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: June 10, 1997
    Assignee: SKW Stickstoffwerke Piesteritz GmbH
    Inventors: Hans J. Michel, Sieghard Lang, Hans J. Hartbrich, Margit Grabarse, Heinz Bohland, Klaus Mockel, Hermann Thieme
  • Patent number: 5549728
    Abstract: A plant growth-enhancing composition comprising a microbial fermentation lysate is described. Also described is an enhanced urea fertilizer comprising the microbial lysate combined with urea or a urea-containing fertilizer. The combination provides a reduced rate of ammonia release by inhibiting urease activity.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: August 27, 1996
    Assignee: Cytozyme Laboratories, Inc.
    Inventors: Elizabeth M. Wozniak, Stephen G. Baughman
  • Patent number: 5482529
    Abstract: A controllably active fertilizing preparation in the form of an emulsion-suspension or an emulsion is comprised of:a) 30-90% by weight of mixtures containing plant nutrients,b) 5-50% by weight of water,c) 2-20% by weight of an oleophilic organic substance,d) 1-25% by weight of a surface-active substance, ande) 0.1-10% by weight of an acid or its mixture, salt or anhydride. The acid component improves the extraction of phosphor.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: January 9, 1996
    Assignee: Kemira OY
    Inventors: Thomas Ahlnas, Stephan Vermeulen, Anders Weckman
  • Patent number: 5435821
    Abstract: A vegetation enhancement composite including a vegetation enhancement agent consisting of a first member selected from the group consisting of at least one macronutrient, micronutrient, nitrogen fertilizer including an inhibitor of nitrification activity, slow release fertilizer, and mixtures of such members and a pesticide; and at least one first controlled release film including a sulfonated polymer coating at least a portion of a surface of the vegetation enhancement agent.
    Type: Grant
    Filed: December 31, 1990
    Date of Patent: July 25, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventors: Ilan Duvdevani, Evelyn N. Drake, Warren A. Thaler, Pacifico V. Manalastas
  • Patent number: 5364438
    Abstract: An improved fluid urea-containing fertilizer composition is disclosed; the composition is essentially comprised of an aqueous solution of urea, ammonium nitrate, N-(n-butyl)thiophosphoric triamide (NBPT), dicyandiamide (DCD), and may optionally also contain a clay as a suspending agent. The fluid fertilizer composition can be applied to a field crop in a single application and will nevertheless supply sufficient nitrogen to the plants throughout their growth and maturing cycles. As a result, the improved composition increases the nitrogen uptake efficiency of plants, enhances crop yields, and minimizes the loss of nitrogen from the soil.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: November 15, 1994
    Assignee: Freeport-McMoRan Resource Partners, Limited Partnership
    Inventors: Charles W. Weston, Lawrence A. Peacock, Willis L. Thornsberry, Jr.
  • Patent number: 5352265
    Abstract: An improved homogenous granular fertilizer composition is disclosed; the composition is comprised primarily of urea, N-(n-butyl)thiophosphoric triamide (NBPT), and dicyandiamide (DCD). The composition of this invention can be applied to a field crop in a single surface application and will nevertheless supply sufficient nitrogen to the plants throughout their growth and maturing cycles. The new improved composition increases the nitrogen uptake by plants, enhances crop yields, and minimizes the loss of both ammonium nitrogen and nitrate nitrogen from the soil.The NBPT is incorporated into the homogenous granular fertilizer composition of this invention by blending a concentrated solution of NBPT in a solvent selected from the group consisting of liquid amides, 2-pyrrolidone, and N-alkyl 2-pyrrolidones directly into molten urea prior to its granulation; the DCD may be added to the urea melt as a solid or in dissolved form along with the NBPT.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: October 4, 1994
    Assignee: Freeport-McMoRan Resource Partners, Limited Partnership
    Inventors: Charles W. Weston, Lawrence A. Peacock, Willis L. Thornsberry, Jr., Allen R. Sutton
  • Patent number: 5261939
    Abstract: A nitrification-inhibiting agent is described which is characterized in that it comprisesa) dicyandiamide andb) guanylthiourea and/or ammonium thiosulphate and/or ammonium phosphate.This agent is distinguished by an increased activity compared to the individual components and by its low toxicity.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: November 16, 1993
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventors: Svatopluk Solansky, Werner Goll, Richard Youngman
  • Patent number: 5147441
    Abstract: A biological product for actively producing nitrogen and phosphate enrichment of soil comprising a nitrogen-fixing effective amount of Azospirillum sp. M32, an amount of Bacillus polymixa M7 sufficient to produce polymyxin, an anti-microbial peptide active against Gram negative bacteria which converts phosphorous materials fixed in the soil to which it is applied to a phosphate in plant-available forms, and a nutrient for the bacteria comprising a cellulosic material containing cellulose as an integral component selected from the group consisting of straw, xylan, hemicellulose and lignin, as well as other organic carbon or nitrogen materials.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: September 15, 1992
    Inventor: Mohamed E. A. Megeed
  • Patent number: 5024689
    Abstract: An improved aqueous nitrogen fertilizer has been developed that increases first-year nitrogen uptake efficiency to plants. It is also a nitrogen with features to minimize exposure to nitrogen loss. It is a nitrogen fertilizer consisting of urea, ammonium nitrate, dicyandiamide, ammonium thiosulfate, and a phosphate compound which is preferably an ammonium phosphate compound. This composition can contain a herbicide and/or various micro nutrients. This aqueous fertilizer solution can be applied to a field crop in a single application and is available to the growing plant throughout its growth and maturing cycle. The aqueous fertilizer composition is conveniently prepared by the addition of a slurry containing dicyandiamide, ammonium thiosulfate and the phosphate compound to a urea-ammonium nitrate solution wherein the nitrogen content has been adjusted to account for the nitrogen that will be supplied by the slurry.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: June 18, 1991
    Assignee: Freeport McMoRan Resource Partners
    Inventors: Allen R. Sutton, Richard L. Balser
  • Patent number: 5022912
    Abstract: The invention is directed to the fumigation of soils, enclosed spaces, agricultural products and other commodities, etc., using compositions which decompose to form carbon disulfide and certain other biocidal materials. Such fumigation can be used to control bacteria, fungi, insects, nematodes, rodents, nitrification, and weeds.Fumigant compositions are described herein as "thiocarbonates," including, without limitation, salts of trithiocarbonic acid and tetrathiocarbonic acid, compositions having empirical formulae intermediate to these acids salts (such as MCS.sub.3.7, wherein M is a divalent metal ion), and compositions containing substances in addition to thiocarbonates, such as a stabilized ammonium tetrathiocarbonate which contains ammonium sulfide, i.e., (NH.sub.4).sub.2 CS.sub.4 (NH.sub.4).sub.2 S.The compositions are generally water soluble and can be prepared, stored, and used in aqueous solutions.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: June 11, 1991
    Assignee: Union Oil Company of California
    Inventors: Donald C. Young, James A. Green, II
  • Patent number: 4969946
    Abstract: Substituted pyrazoles are employed to obtain prolonged nitrification inhibition in naturally occurring alkaline soils.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: November 13, 1990
    Assignee: The Dow Chemical Company
    Inventors: Kim E. Arndt, Ronald W. McCormick
  • Patent number: 4954156
    Abstract: The invention described herein comprises two principal embodiments. The first embodiment comprises operating procedures related to the instant invention which along with urease inhibition test results demonstrate the use of two classes of N-Halamine compounds (N,N'-DIHALO-2-IMIDAZOLIDINONES and N-HALO-2-OXAZOLIDINONES) as inhibitors of the activity of the enzyme urease in solution and agricultural soil systems. The second embodiment comprises operating procedures related to the instant invention which along with nitrification inhibition test results demonstrate the use of the two classes of N-Halamine compounds (N,N'-DIHALO-2-IMIDAZOLIDINONES and N-HALO-2-OXAZOLIDINONES) as inhibitors of nitrification in agricultural soil systems.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: September 4, 1990
    Assignees: Tennessee Valley Authority, Auburn University
    Inventors: Joe Gautney, Shelby D. Worley, Doris H. Ash
  • Patent number: 4932992
    Abstract: The first embodiment of the present invention relates to my discovery that thiophosphoryl triamide can be utilized as a nitrification inhibitor for controlling the nitrification of ammonium to nitrate. The second embodiment relates to my discovery that this same compound can be used to control, within predetermined limits, the ammonium/nitrate ratios in urea-based fertilizers, by serving as a dual-purpose inhibitor to control both urease inhibition and nitrification inhibition and thereby maximize plant response characteristics in direct proportion to nutrient value amendments to the soil environment.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: June 12, 1990
    Assignee: Tennessee Valley Authority
    Inventor: Robert J. Radel
  • Patent number: 4932991
    Abstract: Newly developed testing procedures have demonstrated that three new classes of compounds, the thiopyridine-N-oxides, the thiopyridines, and the thiopyrimidines are highly effective inhibitors of urease activity in agricultural soil systems. Compositions of urea-containing fertilizers in combination with these materials can be used to reduce ammonia loss and control the activity of the soil enzyme urease in the conversion of urea to ammonia.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: June 12, 1990
    Assignee: Tennessee Valley Authority
    Inventors: Robert J. Radel, Michael D. Crenshaw
  • Patent number: 4925476
    Abstract: Nitrification inhibitors contain azole hemiaminal derivatives of the formula ##STR1## where R.sup.1 and R.sup.2 are each hydrogen, alkyl, aryl or halogen, R.sup.3 is alkyl, cycloalkyl, alkoxy, alkenyl, alkynyl, styryl, aryl, hetaryl or aralkyl, where the aromatic radical may be substituted, or is hydroxyl, A and B are each N or CR.sup.4, and R.sup.4 is hydrogen, alkyl, aryl or halogen.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: May 15, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Wagner, Norbert Rieber, Ernst-Heinrich Pommer, Juergen Dressel
  • Patent number: 4808206
    Abstract: Dump release microcapsules are formed of a water-reswellable gel having dispersed therein a sorbtive filler material having a median particle size of not more than 1 micron, such as fumed or precipitated silica. The filler material has an active substance absorbed therein and/or adsorbed thereon. The active material can be 2-chloro-6-(trichloromethyl) pyridine and the gel formed from crosslinked lignin or a lignosulphonate.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: February 28, 1989
    Assignee: The Dow Chemical Company
    Inventor: Geoffrey W. Smith
  • Patent number: 4746349
    Abstract: The present invention relates to methods for suppressing the nitrification of ammonium nitrogen in plant growth medium or soil and compositions which conserve soil nitrogen and supply soil nitrogen requirements necessary for plant nutrition.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: May 24, 1988
    Assignee: American Cyanamid Company
    Inventor: Robert H. Becker
  • Patent number: 4740233
    Abstract: Novel compounds, e.g., 5,7-dimethyl-N-(2,6-dichlorolphenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sul fonamide and their compositions and use in the control of weeds and in the suppression of nitrification of ammonium nitrogen in soil. Other novel compounds and their compositions and use in the inhibition of bolting in sugar beets. Other novel compounds and their compositions and use as plant gametocides.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: April 26, 1988
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Robert J. Ehr, Ben C. Gerwick, III, William T. Monte, Norman R. Pearson, Mark J. Costales, Richard W. Meikle
  • Patent number: 4696693
    Abstract: The invention relates to novel urease inhibited fertilizer compositions containing urea and a urease inhibiting amount of one or more diaminophosphinyl compounds having oxidized sulfur functions, and methods and composition for inhibiting the activity of urease through use of such compounds.
    Type: Grant
    Filed: May 12, 1986
    Date of Patent: September 29, 1987
    Assignee: Allied Corporation
    Inventors: Michael D. Swerdloff, Milorad M. Rogic, Larry L. Hendrickson
  • Patent number: 4676822
    Abstract: The herein described practice and operating procedures relating to the instant invention have demonstrated the utility and economic advantages of slightly acidic, neutral, and slightly basic fluid fertilizer solutions containing urea and the urease inhibitor thiophosphoryl triamide in preventing or at least substantially reducing the loss of ammoniacal nitrogen from soils to which such fluid fertilizers are often surface applied. The results of said testing procedures also demonstrate a new, novel, and heretofore unknown method of utilizing said thiophosphoryl triamide in conjunction with urea which method circumvents the problem usually encountered in the practice of prior art processes of rapid inhibitor decomposition in solid mixtures with urea.
    Type: Grant
    Filed: July 24, 1986
    Date of Patent: June 30, 1987
    Assignee: Tennessee Valley Authority
    Inventor: Joe Gautney
  • Patent number: 4673429
    Abstract: 1-Hydroxypyrazole derivatives of the formula (I) ##STR1## where A is ##STR2## n is 0 or 1, R.sup.1, R.sup.2 and R.sup.3 independently of one another are each hydrogen, chlorine, bromine or iodine, R.sup.4 is hydrogen, a straight-chain or branched, open-chain alkyl, alkenyl or alkynyl radical, a cyclic alkyl, alkenyl or alkynyl radical or aryl or aralkyl, and the radicals R.sup.4 which are capable of substitution may furthermore be monosubstituted or polysubstituted by halogen, haloalkyl, haloalkoxy, alkyl, alkoxy, alkoxycarbonyl, --OH, .dbd.O, --COOH or salts of this, --NO.sub.2 or --CN, have a nitrification-inhibiting action. Substances where R.sup.4 is not hydrogen when n is 0 are novel.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: June 16, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Rieber, Heinrich Boehm, Ernst-Heinrich Pommer, Juergen Dressel
  • Patent number: 4670038
    Abstract: Test show that 2,2,4,4,6,6-hexaaminocyclotriphosphazatriene, 2-phenoxy-2,4,4,6,6-pentaaminocyclotriphosphazatriene, 2,4-diphenoxy-2,4,6,6-tetraaminocyclotriphosphazatriene and 2,4,6-triphenoxy-2,4,6-triaminocyclotriphosphazatriene (also frequently called phosphonitrilic derivatives) of the formula ##STR1## are highly effective inhibitors of urease activity in agricultural soil systems wherein(1) R.sub.1 . . . R.sub.3 '=NH.sub.2 or(2) R.sub.1 '=R.sub.2 '=R.sub.3 '=R.sub.2 =R.sub.3 =NH.sub.2 and R.sub.1 =OC.sub.6 H.sub.5 or(3) R.sub.1 '=R.sub.2 '=R.sub.3 '=R.sub.3 =NH.sub.2 and R.sub.1 =R.sub.2 =OC.sub.6 H.sub.5 or(4) R.sub.1 '=R.sub.2 '=R.sub.3 '=NH.sub.2 and R.sub.1 =R.sub.2 =R.sub.3 =OC.sub.6 H.sub.5.
    Type: Grant
    Filed: August 21, 1986
    Date of Patent: June 2, 1987
    Assignee: Tennessee Valley Authority
    Inventors: Ramiro Medina, Jack M. Sullivan
  • Patent number: 4602927
    Abstract: 4-Alkylimidazole derivatives of the formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.4 -alkyl, R.sup.2 is chlorine or bromine and R.sup.3 is an --OR.sup.4 or --NR.sup.5 R.sup.6 group in which R.sup.4 is C.sub.1 -C.sub.4 -alkyl, R.sup.5 is hydrogen or C.sub.1 -C.sub.4 -alkyl and R.sub.6 is C.sub.1 -C.sub.4 -alkyl or is phenyl which is unsubstituted or substituted by 1 or 2 halogen atoms, and its salts, their preparation and their use as nitrification inhibitors.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: July 29, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Toni Dockner, Ernst-Heinrich Pommer, Juergen Dressel
  • Patent number: 4576625
    Abstract: Fertilizers containing urea with urease inhibitors, wherein the urease inhibitors are bromo-nitro compounds having the formula: ##STR1## wherein A.sub.1 is (CH.sub.2).sub.n.sbsb.1 X.sub.1, and A.sub.2 is (CH.sub.2).sub.n.sbsb.2 X.sub.2, wherein both n.sub.1 and n.sub.2 and X.sub.1 and X.sub.2 are the same or different, the alkyl groups of A.sub.1 and A.sub.2 are straigh-chain or branched-chain alkyl groups, and the substituents X.sub.1 and X.sub.2 are attached to any one of the carbon atoms of the alkyl groups, and n.sub.1 and n.sub.2 are 0 to 6, X.sub.1 and X.sub.2 are H or YR, wherein Y is --O--, --S-- or --NH-- and R is H or a straight or branched chain C.sub.1 -C.sub.6 alkyl, cyclopent(en)yl cyclohex(en)yl or phenyl group having one to three methyl groups or ##STR2## attached thereto, and R.sub.1 is H or a straight or branched chain C.sub.1 -C.sub.6 alkyl, cyclopent(en)yl or cyclohex(en)yl group having one to three methyl groups or ##STR3## attached thereto.
    Type: Grant
    Filed: June 19, 1984
    Date of Patent: March 18, 1986
    Assignee: Huls Aktiengesellschaft
    Inventors: Jurgen Norden, Heinrich Aigner, Fritz Schindler, Reinhard Samblebe
  • Patent number: 4559076
    Abstract: Plant nutrient losses from soils due to ammonia volatilization are reduced by the simultaneous application of nitrogen and an additive material which is adsorbed at soil ion exchange sites more readily than is ammonium ion. Useful materials for this purpose include soluble salts of the alkali metals and/or alkaline earth metals.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: December 17, 1985
    Assignee: Union Oil Company of California
    Inventor: Donald C. Young
  • Patent number: 4552581
    Abstract: Phenylacetylene is added to agricultural field soil containing ammonium nitrogen fertilizer, thereby promoting nitrogen retention by inhibiting soil bacteria nitrification.
    Type: Grant
    Filed: May 3, 1984
    Date of Patent: November 12, 1985
    Assignee: Iowa State University Research Foundation, Inc.
    Inventor: John M. Bremner
  • Patent number: 4551167
    Abstract: A stabilized fumigant composition comprises an aqueous solution containing up to about fifty percent by weight of a solute which comprises ammonia, hydrogen sulfide and carbon disulfide. Elemental sulfur can also be a component of the solute. One preferred composition comprises a solution wherein the molarity of hydrogen sulfide is about 1.5 times the molarity of carbon disulfide, and is about one-half the molarity of ammonia, and wherein the molarity of sulfur is about 1.6 times the molarity of carbon disulfide.The composition decomposes in a soil environment to form sources of available plant nutrients, including ammonia, hydrogen sulfide and sulfur, and carbon disulfide which inhibits nitrification and decreases the nematode population. Nutrient content can be enhanced by the addition of, for example, ammonia, ammonium nitrate, urea and mixtures thereof to the formed composition.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: November 5, 1985
    Assignee: Union Oil Company of California
    Inventors: Donald C. Young, James A. Green, II
  • Patent number: 4551166
    Abstract: The invention relates to a nitrogen fertilizer having a long-term action based on urea-formaldehyde condensation products suspended in water. The fertilizer contains dicyandiamide in an amount of from 5 to 35% by weight of dicyandiamide-nitrogen, based on the nitrogen content of the urea, and from 0.001 to 0.5% by weight of polymers of vinyl alcohol or polymers of aldehyde-carboxylic acids, based on the weight of the suspension.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: November 5, 1985
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventors: Horst Behnke, Horst Michaud, Joseph Seeholzer, Svatoplug Solansky
  • Patent number: 4550173
    Abstract: Ditriazolylvinyl phenyl ketones of the formula I ##STR1## where R is halogen, alkyl of 1 to 6 carbon atoms, alkoxy of 1 to 6 carbon atoms, trifluoromethyl, cyano, nitro, phenyl or phenoxy, and n is an integer from 0 to 5, and the two triazole rings can, as desired, be bonded in the 1-position or 4-position to the vinyl group, their preparation and their use as nitrification inhibitors.
    Type: Grant
    Filed: January 17, 1984
    Date of Patent: October 29, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Alfred Ruland, Wolfgang Reuther, Ernst-Heinrich Pommer, Eberhard Ammermann
  • Patent number: 4545803
    Abstract: Certain metal salts of certain substituted pyrazole dithiocarbamates are employed as the active nitrification inhibitor in the presence of reduced nitrogen fertilizers. Compositions containing these salts can be applied to the surface of the soil and can remain on said soil surface for up to 3 days or more without mechanical incorporation into the soil and retain at least about 70 percent of the pyrazole as the salt in the composition.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: October 8, 1985
    Assignee: The Dow Chemical Company
    Inventors: Kim E. Arndt, Richard B. Rogers, Ronald W. McCormick
  • Patent number: 4545802
    Abstract: Certain pyrazoline compounds are employed as the active nitrification inhibitor in the presence of reduced nitrogen fertilizers.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: October 8, 1985
    Assignee: The Dow Chemical Company
    Inventors: Ronald W. McCormick, Richard B. Rogers
  • Patent number: 4540428
    Abstract: The invention rleates to novel urease inhibited fertilizer compositions containing urea, a urease inhibiting effective amount of phosphorotriamidate compounds, and a method and composition for using such compounds to inhibit the activity of urease.
    Type: Grant
    Filed: March 16, 1983
    Date of Patent: September 10, 1985
    Assignee: Allied Corporation
    Inventors: Michael Van Der Puy, Larry L. Hendrickson, Jaroslav F. Kolc, Milorad M. Rogic, Michael D. Swerdloff
  • Patent number: 4539037
    Abstract: The invention relates to novel urease inhibited fertilizer compositions containing urea and a urease inhibiting amount of phosphorotriamidate compounds, and methods and composition for inhibiting the activity of urease through use of such compounds.
    Type: Grant
    Filed: March 16, 1983
    Date of Patent: September 3, 1985
    Assignee: Allied Corporation
    Inventors: Michael D. Swerdloff, Michael Van Der Puy, Jaroslav F. Kolc, Milorad M. Rogic, Larry L. Hendrickson
  • Patent number: 4537614
    Abstract: Novel urease inhibiting phosphorothiolate compounds, urea based fertilizer compositions including such compounds, and methods and compositions for using such compounds to inhibit the activity of urease.
    Type: Grant
    Filed: February 3, 1984
    Date of Patent: August 27, 1985
    Assignee: Allied Corporation
    Inventors: Michael Van Der Puy, Jaroslav F. Kolc, Louis G. Anello, Larry L. Hendrickson, Milorad M. Rogic, Michael D. Swerdloff
  • Patent number: 4530714
    Abstract: The invention relates to novel urease inhibited fertilizer compositions containing urea and a urease inhibiting amount of one or more phosphoric triamide compounds, and methods and composition for inhibiting the urease catalyzed hydrolysis of urea through use of such compounds.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: July 23, 1985
    Assignee: Allied Corporation
    Inventors: Jaroslav F. Kolc, Michael D. Swerdloff, Milorad M. Rogic, Larry L. Hendrickson, Michael Van Der Puy
  • Patent number: 4528020
    Abstract: The invention relates to novel urease inhibited fertilizer compositions containing urea and a urease inhibiting amount of hydroxamic acid or diaminophosphinyl compounds, and methods and composition for inhibiting the activity of urease through use of such compounds.
    Type: Grant
    Filed: June 16, 1983
    Date of Patent: July 9, 1985
    Assignee: Allied Corporation
    Inventors: Jaroslav F. Kolc, Michael D. Swerdloff, Milorad M. Rogic, Larry L. Hendrickson
  • Patent number: H25
    Abstract: My testing procedures have demonstrated that thiophosphoryl triamide (I) and its linear thermal polymers (II) having the structures illustrated below are highly effective inhibitors of urease activity in agricultural soil systems.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: February 4, 1986
    Assignee: Tennessee Valley Authority
    Inventor: Robert J. Radel