WO2010073238A1 - Desensitized agent - Google Patents
Desensitized agent Download PDFInfo
- Publication number
- WO2010073238A1 WO2010073238A1 PCT/IL2008/001658 IL2008001658W WO2010073238A1 WO 2010073238 A1 WO2010073238 A1 WO 2010073238A1 IL 2008001658 W IL2008001658 W IL 2008001658W WO 2010073238 A1 WO2010073238 A1 WO 2010073238A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- potassium nitrate
- product
- desensitized
- flame retardant
- nitrate
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C5/00—Fertilisers containing other nitrates
- C05C5/02—Fertilisers containing other nitrates containing sodium or potassium nitrate
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/005—Desensitisers, phlegmatisers
Definitions
- the present invention relates to the field of the desensitization of chemical materials. More particularly, the invention relates to a method for desensitizing potassium nitrate. Still more particularly, the invention relates to a method for preventing the use of the fertilizer potassium nitrate for the production of gun powder or other energetic materials.
- Potassium nitrate is a widespread fertilizer, manufactured and sold all over the world. While potassium nitrate is a valuable nutrient for crops, it is also found in various energetic mixtures such as gun powder that can be used to propel cartridges and in general energetic materials, by the simple addition of readily available additives, such as coal powder and sulfur.
- the invention is directed to a desensitized potassium nitrate product comprising as a desensitizing agent at least one additive selected from among scavengers that are reactive with the nitrate moiety, or a flame retardant compound, or a mixture of two or more of said additives.
- the scavenger is chosen from among the nitrate scavengers group - for example urea.
- the flame retardant is chosen from among groups of halocarbon, hydrate, phosphate or borate flame retardants - for example magnesium sulfate, ammonium phosphate or boric acid
- the desensitizing agent comprises up to 15% by weight as related to potassium nitrate, preferably 5-10%. While the addition of higher amounts of additive may further desensitize the resulting mixture, there is a balance between cost and effect, and procesability considerations. Accordingly, for many applications it is sufficient that the additive be present in an amount of up to 10% by weight of the potassium nitrate. The skilled person would be able to determine the optimal amount for his specific requirements, in each case.
- the invention further encompasses a desensitized potassium nitrate product comprising as a desensitizing agent at least one additive selected from among scavengers that are reactive with the nitrate moiety, or a flame retardant compound, or a mixture of two or more of said additives.
- the invention is directed to a method for desensitizing a potassium nitrate product, comprising adding to said potassium nitrate product a desensitizing agent additive selected from among oxygen scavengers that are reactive with the nitrate moiety, or a flame retardant compound, or a mixture of two or more of said additives.
- a desensitizing agent additive selected from among oxygen scavengers that are reactive with the nitrate moiety, or a flame retardant compound, or a mixture of two or more of said additives.
- Potassium nitrate may be used in the preparation of various harmful materials.
- One example of such dangerous products is gunpowder.
- the mixture When used to manufacture gunpowder, the mixture is typically made of 75% potassium nitrate, 15% coal and 10% sulfur.
- compositions were prepared from the basic mixture of 75% potassium nitrate, 15% coal and 10% sulfur.
- a desensitizing additive comprising 10% by weight was mixed with potassium nitrate prior to preparation of the mixture, except for the basic mixture. All percentages mentioned herein are by weight.
- the impact sensitivity of the various mixtures was estimated using the BAM drop-hammer impact test. The impact energy is determined by the following equation, where M is the mass of the drop weight, H is the height from which the weight is being dropped and g is gravitational acceleration:
- the H 50 value (the height from which 50% of the samples explode) was determined according to the Bruceton method, using a 5Kg weight (according to B. T. Fedoroff; O. E. Sheffield;G., ENCYCLOPEDIA OF EXPLOSIVES AND RELATED ITEMS, vol. 5, New Jersey, USA, 1972, p.p. D1550-1555).
- This method available for testing gunpowder sensitivity allows for an experimental error of up to 20%. Accordingly, results within this experiment error are considered to be of the same kind.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fireproofing Substances (AREA)
Abstract
The invention relates to a desensitized potassium nitrate product which comprises as a desensitizing agent at least one additive selected from among scavengers that are reactive with the nitrate moiety, or a flame retardant compound selected from hydrate, phosphate or borate flame retardants, or a mixture of two or more of said additives.
Description
DESENSITIZED AGENT
Field of the Invention
The present invention relates to the field of the desensitization of chemical materials. More particularly, the invention relates to a method for desensitizing potassium nitrate. Still more particularly, the invention relates to a method for preventing the use of the fertilizer potassium nitrate for the production of gun powder or other energetic materials.
Background of the Invention
Potassium nitrate is a widespread fertilizer, manufactured and sold all over the world. While potassium nitrate is a valuable nutrient for crops, it is also found in various energetic mixtures such as gun powder that can be used to propel cartridges and in general energetic materials, by the simple addition of readily available additives, such as coal powder and sulfur.
It is an object of the present invention to provide a method which permits to desensitize potassium nitrate in a simple and cost-effective manner.
It is another object of the invention to provide desensitized potassium nitrate mixtures, which can be efficiently used for regular agricultural uses, inasmuch as they do not contain additives that are- harmful to crops or to the environment, or which are too expensive to be used in
agricultural applications. Desensitized potassium nitrate can be easily shipped without the need for special cautions against unwanted explosion.
Summary of the Invention
In one aspect the invention is directed to a desensitized potassium nitrate product comprising as a desensitizing agent at least one additive selected from among scavengers that are reactive with the nitrate moiety, or a flame retardant compound, or a mixture of two or more of said additives.
According to a preferred embodiment of the invention the scavenger is chosen from among the nitrate scavengers group - for example urea. According to another preferred embodiment of the invention the flame retardant is chosen from among groups of halocarbon, hydrate, phosphate or borate flame retardants - for example magnesium sulfate, ammonium phosphate or boric acid
The desensitizing agent comprises up to 15% by weight as related to potassium nitrate, preferably 5-10%. While the addition of higher amounts of additive may further desensitize the resulting mixture, there is a balance between cost and effect, and procesability considerations. Accordingly, for many applications it is sufficient that the additive be present in an amount of up to 10% by weight of the potassium nitrate. The
skilled person would be able to determine the optimal amount for his specific requirements, in each case.
The invention further encompasses a desensitized potassium nitrate product comprising as a desensitizing agent at least one additive selected from among scavengers that are reactive with the nitrate moiety, or a flame retardant compound, or a mixture of two or more of said additives.
In another aspect the invention is directed to a method for desensitizing a potassium nitrate product, comprising adding to said potassium nitrate product a desensitizing agent additive selected from among oxygen scavengers that are reactive with the nitrate moiety, or a flame retardant compound, or a mixture of two or more of said additives.
Potassium nitrate may be used in the preparation of various harmful materials. One example of such dangerous products is gunpowder. When used to manufacture gunpowder, the mixture is typically made of 75% potassium nitrate, 15% coal and 10% sulfur.
The above and other characteristics and advantages of the invention will be further understood through the following description of illustrative and non-limitative examples.
- A -
Detailed Description of the Preferred Embodiments
The invention will be illustrated with reference to the following specific examples. In the examples to follow the sensitivity of various desensitized compositions was compared with a composition to which no desensitizing additives have been added. The results clearly show that potassium nitrate can be desensitized within the framework of the environmental requirements described above.
Example 1
Various compositions were prepared from the basic mixture of 75% potassium nitrate, 15% coal and 10% sulfur. A desensitizing additive comprising 10% by weight was mixed with potassium nitrate prior to preparation of the mixture, except for the basic mixture. All percentages mentioned herein are by weight. The impact sensitivity of the various mixtures was estimated using the BAM drop-hammer impact test. The impact energy is determined by the following equation, where M is the mass of the drop weight, H is the height from which the weight is being dropped and g is gravitational acceleration:
Im pact energy (J)
The H50 value (the height from which 50% of the samples explode) was determined according to the Bruceton method, using a 5Kg weight (according to B. T. Fedoroff;
O. E. Sheffield;G., ENCYCLOPEDIA OF EXPLOSIVES AND RELATED ITEMS, vol. 5, New Jersey, USA, 1972, p.p. D1550-1555). This method available for testing gunpowder sensitivity allows for an experimental error of up to 20%. Accordingly, results within this experiment error are considered to be of the same kind.
The results are detailed in Table I below.
Table I
From the results shown above it is clear that an amount of up to 10% of additive should be added, to ensure a lack of sensitivity to impact above 250 cm. Of course, somewhat lower amounts can be used, and the skilled person we be able to determine the optimal amount for his specific requirements, in each case.
The above description and examples have been provided for the purpose of illustration and are not intended to limit the invention in any way. Many
different combinations of mixtures and of additives can be used to desensitize potassium nitrate, according to the method described herein, without exceeding its scope.
Claims
1. A desensitized potassium nitrate product comprising as a desensitizing agent at least one additive selected from among scavengers that are reactive with the nitrate moiety, or a flame retardant compound selected from hydrate, phosphate or borate flame retardants, or a mixture of two or more of said additives.
2. A product according to claim 1, wherein the scavenger is urea.
3. The product according to claim 1, wherein the flame retardant is magnesium sulfate, ammonium phosphate or boric acid.
4. A product according to any one of claims 1 to 3, wherein the additive is present in an amount of up to 10% by weight of the potassium nitrate.
5. A desensitized potassium nitrate product comprising as a desensitizing agent at least one additive selected from among scavengers that are reactive with the nitrate moiety, or a flame retardant compound, or a mixture of two or more of said additives.
6. A method for desensitizing a potassium nitrate product, comprising adding to said potassium nitrate product a desensitizing agent additive selected from among scavengers that are reactive with the nitrate moiety, or a flame retardant compound, or a mixture of two or more of said additives.
7. A method according to claim 6, wherein the scavenger is urea.
8. The method of claim 6, wherein the flame retardant is magnesium sulfate, ammonium phosphate or boric acid.
9. A method according to any one of claims 6 to 8, wherein the additive is present in an amount of up to 10% by weight of the potassium nitrate.
10. A method for desensitizing a potassium nitrate product, essentially as described and illustrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IL2008/001658 WO2010073238A1 (en) | 2008-12-23 | 2008-12-23 | Desensitized agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IL2008/001658 WO2010073238A1 (en) | 2008-12-23 | 2008-12-23 | Desensitized agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010073238A1 true WO2010073238A1 (en) | 2010-07-01 |
Family
ID=40983607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IL2008/001658 Ceased WO2010073238A1 (en) | 2008-12-23 | 2008-12-23 | Desensitized agent |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2010073238A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12338189B2 (en) | 2023-05-24 | 2025-06-24 | Defuse Technologies, LLC | Desensitized fertilizer compositions and methods of making same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1016147A (en) * | 1963-12-17 | 1966-01-05 | Ici Ltd | Improvements in and relating to fertilizers |
| GB1215016A (en) * | 1967-12-14 | 1970-12-09 | Samuel John Porter | Method of desensitizing fertilizer grade ammonium nitrate and the product obtained |
| US4184969A (en) * | 1978-08-04 | 1980-01-22 | Bhat Industries, Inc. | Fire- and flame-retardant composition |
| US6025027A (en) * | 1999-04-26 | 2000-02-15 | Mountain Develpoment | Method for producing cellulose insulation materials using liquid borate fire retardant compositions |
| WO2003106377A2 (en) * | 2002-01-24 | 2003-12-24 | Specialty Fertilizer Products Llc | Anti-explosive fertilizer coatings |
| US6669753B1 (en) * | 2001-10-09 | 2003-12-30 | The United States Of America As Represented By The Secretary Of The Navy | Method and composition for desensitizing the explosive performance of commercially available fertilizers |
| WO2007084873A2 (en) * | 2006-01-13 | 2007-07-26 | Honeywell International Inc. | Stabilized compositions comprising ammonium nitrate |
-
2008
- 2008-12-23 WO PCT/IL2008/001658 patent/WO2010073238A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1016147A (en) * | 1963-12-17 | 1966-01-05 | Ici Ltd | Improvements in and relating to fertilizers |
| GB1215016A (en) * | 1967-12-14 | 1970-12-09 | Samuel John Porter | Method of desensitizing fertilizer grade ammonium nitrate and the product obtained |
| US4184969A (en) * | 1978-08-04 | 1980-01-22 | Bhat Industries, Inc. | Fire- and flame-retardant composition |
| US6025027A (en) * | 1999-04-26 | 2000-02-15 | Mountain Develpoment | Method for producing cellulose insulation materials using liquid borate fire retardant compositions |
| US6669753B1 (en) * | 2001-10-09 | 2003-12-30 | The United States Of America As Represented By The Secretary Of The Navy | Method and composition for desensitizing the explosive performance of commercially available fertilizers |
| WO2003106377A2 (en) * | 2002-01-24 | 2003-12-24 | Specialty Fertilizer Products Llc | Anti-explosive fertilizer coatings |
| WO2007084873A2 (en) * | 2006-01-13 | 2007-07-26 | Honeywell International Inc. | Stabilized compositions comprising ammonium nitrate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12338189B2 (en) | 2023-05-24 | 2025-06-24 | Defuse Technologies, LLC | Desensitized fertilizer compositions and methods of making same |
| US12338190B2 (en) | 2023-05-24 | 2025-06-24 | Defuse Technologies, LLC | Desensitized fertilizer compositions and methods of making same |
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