UREA AND NITROGEN STABILIZER COMPOSITIONS AND METHODS AND SYSTEMS OF MAKING AND USING THEREOF

• US 20150101379A1
• Filed: 08/25/2014
• Published: 04/16/2015
• Est. Priority Date: 08/23/2013
• Status: Active Grant

• Current Assignee: KOCH Agronomic Services LLC (KOCH Industries Incorporated)
• Original Assignee: KOCH Agronomic Services LLC (KOCH Industries Incorporated)
• Inventors: Gabrielson, Kurt D., Sutton, Allen
• Granted Patent: US 9,394,210 B2
• Time in Patent Office: Days
• US Class Current: 71/28
• CPC Class Codes: B01F 27/113 Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
• CPC Class Codes: C05B 7/00 Fertilisers based essentially on alkali or ammonium orthophosphates C05B11/00 takes precedence
• CPC Class Codes: C05C 1/02 Granulation apparatus B01J2/00; Pelletisation; Stabilisation; Colouring
• CPC Class Codes: C05C 9/00 Fertilisers containing urea or urea compounds
• CPC Class Codes: C05G 3/90 for affecting the nitrification of ammonium compounds or urea in the soil
• CPC Class Codes: C09K 15/22 containing an amide or imide moiety
• CPC Class Codes: C09K 15/26 containing nitrogen and sulfur
• CPC Class Codes: Y02P 60/21 Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Abstract

This invention relates to an improved urea-nitrogen stabilizer composition and methods, systems and apparatti for making thereof. The nitrogen stabilizer composition is incorporated into molten urea to result in a composition that contains less biuret, NMP, nitrogen stabilizer and/or impurities and provides an effective solid fertilizer. These compositions are useful in odor control.

Claims

1. A urea-nitrogen stabilizer composition comprising:

a) urea; and

b) an nitrogen stabilizer composition comprising a urease inhibitor, a nitrification inhibitor or combinations thereof; and

c) less than 1.8 weight percent biuret based on the total weight of the urea-nitrogen stabilizer composition.

40. A method of enhancing the growth of plants by applying to soil a solid urea-nitrogen stabilizer composition of claim 1.

42. A system for producing a solid urea-nitrogen stabilizer composition of claim 1 comprising:

a) urea; and

b) a nitrogen stabilizer composition selected from the group consisting of a urease inhibitor composition and a nitrification inhibitor composition, and combinations thereof;

the system comprising, a urea synthesizing unit, a water evaporating unit, a nitrogen stabilizer composition feeding apparatus, a mixing apparatus for mixing molten urea and said nitrogen stabilizer composition; and

a cooling apparatus into which the molten urea-nitrogen stabilizer composition is fed and cooled and said solid urea-nitrogen stabilizer composition is formed.

68. A method of making a molten urea-nitrogen stabilizer composition comprising:

providing an apparatus of claim 62 with molten urea and a nitrogen stabilizer composition of claim 1; and

mixing the molten urea and the nitrogen stabilizer composition to form a molten urea-nitrogen stabilizer composition.

69. A kit comprising a composition of claim 1 and at least one indicator selected from the group consisting of a crush strength indicator, a particle size indicator.

2. A urea-nitrogen stabilizer composition comprising:

a) urea; and

b) a urease inhibitor composition in a liquid carrier comprising N-methyl-2-pyrrolidone (NMP);

wherein the amount of NMP is less than 0.1 weight percent based on the total weight of the urea-nitrogen stabilizer composition; and

c) a nitrification inhibitor.

3. A urea-nitrogen stabilizer composition comprising:

a) urea; and

b) a urease inhibitor composition;

wherein the urease inhibitor composition is substantially free from a solid or liquid carrier.

4. A urea-nitrogen stabilizer composition comprising:

a) urea; and

b) a nitrogen stabilizer composition comprising a urease inhibitor, a nitrification inhibitor or combinations thereof; and

a liquid carrier which is substantially free of NMP.

5. A urea-nitrogen stabilizer composition comprising:

a) urea; and

b) a nitrogen stabilizer composition comprising a urease inhibitor, a nitrification inhibitor or combinations thereof; and

a solid or liquid carrier wherein if a liquid carrier is present, it comprises a component other than N-methyl-2-pyrrolidione (NMP).

6. A urea-nitrogen stabilizer composition comprising:

a) molten urea; and

b) a nitrification inhibitor composition comprising a nitrification inhibitor and a solid or liquid carrier.

7. A urea-nitrogen stabilizer composition comprising:

a) molten urea; and

b) a nitrogen stabilizer composition comprising a urease inhibitor, a nitrification inhibitor, or combinations thereof and a solid carrier.

8. A urea-nitrogen stabilizer composition consisting essentially of:

a) molten urea; and

b) a nitrogen stabilizer composition wherein the nitrogen stabilizer composition is a urease inhibitor composition.

9-26. -26. (canceled)

27. A method of producing a solid urea-nitrogen stabilizer composition comprising:

a) urea; and

b) a nitrogen stabilizer composition selected from the group consisting of a urease inhibitor composition and a nitrification inhibitor composition, and combinations thereof;

wherein at least one nitrogen stabilizer composition comprises a urease inhibitor;

wherein the amount of the urease inhibitor is less than 0.2 weight percent based on the total weight of the urea-nitrogen stabilizer composition, the method comprising;

a) forming molten urea;

b) dehydrating the molten urea so that the water content is less than 0.2 weight %;

c) adding said urease inhibitor composition and optionally to form a molten urea-nitrogen stabilizer composition; and

d) cooling the molten urea-nitrogen stabilizer composition to form said solid urea-nitrogen stabilizer composition;

wherein the time between adding the urease nitrogen stabilizer composition to cooling the molten urea-nitrogen stabilizer composition is less than about 20 seconds.

28. A method of producing a solid urea-nitrogen stabilizer composition comprising:

a) urea; and

b) a nitrogen stabilizer composition selected from the group consisting of a urease inhibitor composition and a nitrification inhibitor composition, and combinations thereof;

wherein at least one nitrogen stabilizer composition comprises a urease inhibitor;

wherein the amount of the urease inhibitor is less than 0.2 weight percent based on the total weight of the urea-nitrogen stabilizer composition, the method comprising;

a) forming molten urea;

b) adding said urease inhibitor composition and optionally to form a molten urea-nitrogen stabilizer composition; and

c) cooling the molten urea-nitrogen stabilizer composition to form said solid urea-nitrogen stabilizer composition;

wherein the degradation of the urease inhibitor is less than about 1 weight percent based on the initial weight of the urease inhibitor before addition.

29-39. -39. (canceled)

41. A system for mixing an nitrogen stabilizer composition selected from the group consisting of a urease inhibitor composition and a nitrification inhibitor composition, and combinations thereof;

with molten urea, the system comprising, a urea synthesizing unit, a water evaporating unit down-stream from said urea synthesizing unit, at least one feeding apparatus for feeding said nitrogen stabilizer composition into, at least one mixing apparatus wherein the molten urea and nitrogen stabilizer composition are mixed.

43. A system for producing a solid urea-nitrogen stabilizer composition comprising:

a) urea; and

b) a nitrogen stabilizer composition selected from the group consisting of a urease inhibitor composition and a nitrification inhibitor composition, and combinations thereof;

the system comprising;

     1) a urea synthesizing unit for providing a molten urea,

     2) a water evaporating unit,

     3) a nitrogen stabilizer composition feeding apparatus for adding an nitrogen stabilizer composition into,

     4) at least one mixing apparatus configured to receive and mix said molten urea and said nitrogen stabilizer composition; and

     5) a cooling apparatus into which the molten urea-nitrogen stabilizer composition is fed and cooled and said solid urea-nitrogen stabilizer composition is formed;

characterized in that at least one mixing apparatus is arranged between said urea synthesizer unit and the cooling apparatus.

44-56. -56. (canceled)

57. A mixing apparatus comprising:

1) a means for feeding molten urea adapted to feed molten urea into;

     2) at least one mixing means adapted to receive said molten urea;

     3) a feeding means adapted to add an nitrogen stabilizer composition into the mixing means;

     4) a fluid outlet connected to the mixing means;

through which fluid may flow.

58-63. -63. (canceled)

64. An nitrogen stabilizer composition feeding apparatus suitable for feeding a solid composition comprising 1) a solid nitrogen stabilizer composition input, 2) and a conveying means selected from a) a screw conveying means;

b) a pneumatic conveying means; and

combinations thereof.

65-67. -67. (canceled)