Fertilizer compositions and methods of making and using the same

Patent metadata

Field	Value
Publication number	US-2016332928-A1
Application number	US-201615154255-A
Country	US
Kind code	A1
Filing date	May 13, 2016
Priority date	May 13, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

Broadly, the instant disclosure is directed towards: fertilizer compositions and methods of making the same, in which, due to the composition, the fertilizer exhibits blast suppression (e.g. measured via specific impulse) and/or desensitization (e.g. measured via unconfined critical diameter and/or booster quantity needed to initiate detonation) as compared to existing ammonium nitrate fertilizer(s).

First claim

What is claimed is:

1 . A method, comprising:
heating a stabilizer material comprising an LDH to a temperature of greater than 350 C to not greater than 650 C to form a treated LDH stabilizer material; combining the treated stabilizer material with a molten ammonium nitrate material to form a molten fertilizer composition; prilling the molten fertilizer composition to form a prilled product,
the fertilizer composition including: the ammonium nitrate material and the LDH stabilizer material; wherein the fertilizer composition is configured, via an effective amount of the treated stabilizer material, to have a blast resistance, when measured in accordance with a blast propagation test.

2 . The method of claim 1 , wherein the LDH comprises: a hydrocalumite material.

3 . The method of claim 1 , wherein the LDH comprises: a hydrotalcite material.

4 . The method of claim 1 , wherein the fertilizer composition is a homogenous blend.

5 . The method of claim 1 , wherein the fertilizer product comprises a mesh size of between 4 mesh and 20 mesh.

6 . The method of claim 1 , wherein the heating step further comprises: heating the LDH to a temperature between 375° C. and 500° C.

7 . A method, comprising:
mixing a treated stabilizer material comprising a phosphoric acid rinsed LDH, the resulting LDH having a pH of less than of 8.49 with a molten AN to form a molten fertilizer composition; and prilling the molten fertilizer composition to form a prilled product, wherein the fertilizer composition including: the ammonium nitrate material and the LDH stabilizer material; wherein the fertilizer composition is configured, via an effective amount of the treated stabilizer material, to have a blast resistance, when measured in accordance with a blast propagation test.

8 . The method of claim 1 , wherein the LDH comprises: a hydrocalumite material.

9 . The method of claim 1 , wherein the LDH comprises: a hydrotalcite material.

10 . The method of claim 1 , wherein the fertilizer composition is a homogenous blend.

11 . The method of claim 1 , wherein the fertilizer product comprises a mesh size of between 4 mesh and 20 mesh.

12 . A method, comprising:
neutralizing a stabilizer material comprising an LDH with a phosphoric acid solution to provide a treated stabilizer material having a pH of not greater than 8.49; mixing the treated stabilizer with a molten AN to form a molten fertilizer composition; and prilling the molten fertilizer composition to form a prilled product, wherein the fertilizer composition including: the ammonium nitrate material and the LDH stabilizer material; wherein the fertilizer composition is configured, via an effective amount of the treated stabilizer material, to have a blast resistance, when measured in accordance with a blast propagation test.

13 . The method of claim 1 , wherein the LDH comprises: a hydrocalumite material.

14 . The method of claim 1 , wherein the LDH comprises: a hydrotalcite material.

15 . The method of claim 1 , wherein the fertilizer composition is a homogenous blend.

16 . The method of claim 1 , wherein the fertilizer product comprises a mesh size of between 4 mesh and 20 mesh.

17 . A method, comprising:
treating a stabilizer material with an effective treatment selected from the group consisting of: at least one of a thermal treatment and a chemical treatment to provide a treated stabilizer material; mixing the treated stabilizer material and an ammonium nitrate material to form a molten fertilizer composition; directing the molten fertilizer composition through a prilling head to form droplets of the fertilizer composition; flowing the droplets from the top of a chamber to the bottom of a chamber, where the top of the chamber is configured in liquid communication with the prilling head, wherein the chamber is configured with a gas flow configured at a sufficient temperature to cool the droplets; solidifying the droplets as the droplets pass through the gas; and forming a prilled fertilizer product, the fertilizer product comprising: the ammonium nitrate material and the treated stabilizer material; wherein the fertilizer product is configured, via an effective amount of the treated stabilizer material, to have a blast resistance, when measured in accordance with a blast propagation test.

18 . The method of claim 1 , wherein the stabilizer material is an LDH.

19 . The method of claim 18 , wherein the LDH comprises: a hydrocalumite material.

20 . The method of claim 1 , wherein the LDH comprises: a hydrotalcite material.

21 . The method of claim 1 , wherein the fertilizer composition is a homogenous blend.

22 . The method of claim 1 , wherein the fertilizer product comprises a mesh size of between 4 mesh and 20 mesh.

Assignees

• Alcoa Inc

Inventors

• Weaver Mark L
• Paola Vincent
• Cravener John
• Raghunathan Narsimhan
• Nichols Judodine

Classifications

• C05C1/02

  Granulation (apparatus B01J2/00); Pelletisation; Stabilisation; Colouring · CPC title

• C05C1/00

  Ammonium nitrate fertilisers · CPC title

• C05G3/00 Primary

  Mixtures of one or more fertilisers with additives not having a specially fertilising activity · CPC title

• C05D9/00

  Other inorganic fertilisers · CPC title

• C05G5/12

  Granules or flakes · CPC title