US4331490A
Expired / Lapsed
US
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Ammonium nitrate slurry compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1981-01-22
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Granted: 1982-05-25
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Expires: 2001-01-22
Abstract
Abstract A slurry composition based essentially on ammonium nitrate, prepared by a process which comprises comminuting solid substance containing ammonium nitrate by grinding in the presence of a saturated solution of solid in a liquid in which the solid has a solubility greater than 1% by weight, the mixture of the solution and the solid being in fluid condition with the solid being a separate phase during grinding and the solution having dissolved therein an additive which is a crystal growth inhibitor for the solid whereby crystal growth is inhibited at both existing crystal surfaces and new crystal surfaces created by the breaking down of relatively coarse particles.
Inventors
- 👤 Derek A. Palgrave
- 👤 Frederick A. Waite
- 👤 James D. Birchall
- 👤 John Cooper
- 👤 James A. Enever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:13
CPC Classifications
C; C05; C05C; C05C1/00; C05C1/02; B; B02; B02C; B02C23/00; B02C23/06; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/112
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
108 words
A slurry explosive composition based essentially on ammonium nitrate, prepared by a process which comprises comminuting solid substance containing ammonium nitrate by grinding in the presence of a saturated solution of solid in a liquid in which the solid has a solubility greater than 1% by weight, the mixture of the solution and the solid being in fluid condition with the solid being a separate phase during grinding and the solution having dissolved therein an additive which is a crystal growth inhibitor for the solid whereby crystal growth is inhibited at both existing crystal surfaces and new crystal surfaces created by the breaking down of relatively coarse particles.
Claim 2
Dependent Claim
108 words
A slurry explosive composition based essentially on ammonium nitrate, prepared by a process which comprises comminuting solid substance containing ammonium nitrate by grinding in the presence of a saturated solution of solid in a liquid in which the solid has a solubility greater than 1% by weight, the mixture of the solution and the solid being in fluid condition with the solid being a separate phase during grinding and the solution having dissolved therein an additive which is a crystal growth inhibitor for the solid whereby crystal growth is inhibited at both existing crystal surfaces and new crystal surfaces created by the breaking down of relatively coarse particles.
Claim 3
Dependent Claim
14 words
A slurry explosive composition as in claim 1 wherein the additive is a polysaccharide.
Claim 4
Dependent Claim
14 words
A slurry explosive as in claim 1 wherein the additive is sodium carboxymethyl cellulose.
Claim 5
Dependent Claim
20 words
A slurry explosive as in claim 1 wherein the additive is a long chain aliphatic amine or a salt thereof.
Claim 6
Dependent Claim
39 words
A slurry explosive as in claim 4 wherein the additive is an aliphatic primary, secondary or tertiary amine in which the aliphatic group contains between 6 and 18 carbon atoms, or the acetate or oleate of such an amine.
Claim 7
Dependent Claim
17 words
A slurry explosive as in claim 1 wherein the additive is a low molecular weight inorganic salt.
Claim 8
Dependent Claim
36 words
A slurry explosive as in claim 1 wherein the amount of additive employed is at least 0.05% of the total weight of the solid present in the mixture being comminuted, including that dissolved in the liquid.
Claim 9
Dependent Claim
27 words
A slurry explosive composition as in any one of claims 1, 2, 3, 4, 5, 6 or 7 wherein said saturated solution is a saturated aqueous solution.
Claim 10
Dependent Claim
37 words
A slurry explosive composition as in any one of claims 1, 2, 3, 4, 5, 6 or 7 wherein said solid substance also contains a salt selected from the group consisting of sodium nitrate and calcium nitrate.
Claim 11
Dependent Claim
95 words
A slurry composition based essentially on ammonium nitrate, prepared by a process which comprises comminuting a solid substance containing ammonium nitrate by grinding in the presence of an aqueous saturated solution of the solid, the mixture of the solution and the solid being in fluid condition with the solid being a separate phase during grinding and the solution having dissolved therein an additive which is a crystal growth inhibitor for the solid whereby crystal growth is inhibited at both existing crystal surfaces and new crystal surfaces created by the breaking down of relatively coarse particles.
Claim 12
Dependent Claim
95 words
A slurry composition based essentially on ammonium nitrate, prepared by a process which comprises comminuting a solid substance containing ammonium nitrate by grinding in the presence of an aqueous saturated solution of the solid, the mixture of the solution and the solid being in fluid condition with the solid being a separate phase during grinding and the solution having dissolved therein an additive which is a crystal growth inhibitor for the solid whereby crystal growth is inhibited at both existing crystal surfaces and new crystal surfaces created by the breaking down of relatively coarse particles.
Claim 13
Dependent Claim
13 words
A slurry composition as in claim 10 wherein the additive is a polysaccharide.
Claim 14
Dependent Claim
14 words
A slurry composition as in claim 10 wherein the additive is sodium carboxymethyl cellulose.
Claim 15
Dependent Claim
20 words
A slurry composition as in claim 10 wherein the additive is a long chain aliphatic amine or a salt thereof.
Claim 16
Dependent Claim
39 words
A slurry composition as in claim 13 wherein the additive is an aliphatic primary, secondary or tertiary amine in which the aliphatic group contains between 6 and 18 carbon atoms, or the acetate or oleate of such an amine.
Claim 17
Dependent Claim
17 words
A slurry composition as in claim 10 wherein the additive is a low molecular weight inorganic salt.
Claim 18
Dependent Claim
36 words
A slurry composition as in claim 10 wherein the amount of additive employed is at least 0.05% of the total weight of the solid present in the mixture being comminuted, including that dissolved in the liquid.
References Cited (Backward Citations)
US4265406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |