Patent US3886010A successfully refreshed from Google Patents.
US3886010A
Expired / Lapsed
US
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Stabilized and aerated blasting slurry containing thiourea and a nitrite gassing agent
Assignee: Ireco Inc
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Filing: 1973-07-05
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Granted: 1975-05-27
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Expires: 1993-07-05
Abstract
Abstract A stabilized and aerated blasting slurry is made up of an aqueous or partly aqueous solution of inorganic oxidizer salt, preferably comprising ammonium, sodium and/or calcium nitrate, in which a suspension of finely divided fuel, such as metallic aluminum, carbonaceous material, and/or TNT or other selfexplosive is suspended. The suspension is stabilized by adding a gelling agent, e.g. guar gum, to the solution, adding a further thickener, such as starch, to the suspension, and incorporating a gas generating chemical, e.g. ammonium nitrite, or nitrous acid, along with an oxidizer-reducer cross-linking system.
Inventors
- 👤 Gary M Thornley
- 👤 Lex L Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:20
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
IN A BLASTING COMPOSITION OF THE AQUEOUS GEL OR SLURRY TYPE EMPLOYING A DECOMPOSABLE NITRITE GASSING AGENT AND CONTAINING OXIDIZER SALT SELECTED FROM THE GROUP WHICH CONSISTS OF THE AMMONIUM, ALKALI METAL AND ALKALINE EARTH METAL NITRATES AND THE AMMONIUM AND ALKALI METAL CHLORATES AND PERCHLORATES, A SUFFICIENT AMOUNT OF FUEL OF LIQUID OR SOLID TYPE OR BOTH TO BRING THE OVERALL OXYGEN BALANCE OF THE COMPOSITION WITHIN THE RANGE OF +25 TO -50 PERCENT, AN AQUEOUS FLUID PHASE CONTAINING AT LEAST PART OF THE OXIDIZER SALT IN A CONCENTRATED SOLUTION, AND AN ORGANIC COLLOIDAL GALACTOMANNAN THICKENER, THE IMPROVEMENT WHICH COMPRISES INCLUDING THIOUREA TO ACCELERATE DECOMPOSITION OF THE NITRITE GASSING AGENT WHILE CONCOMITANTLY STABILIZING THE THICKENING EFFECTIVENESS OF THE GLACTOMANNA THICKENER.
Claim 2
Dependent Claim
121 words
IN A BLASTING COMPOSITION OF THE AQUEOUS GEL OR SLURRY TYPE EMPLOYING A DECOMPOSABLE NITRITE GASSING AGENT AND CONTAINING OXIDIZER SALT SELECTED FROM THE GROUP WHICH CONSISTS OF THE AMMONIUM, ALKALI METAL AND ALKALINE EARTH METAL NITRATES AND THE AMMONIUM AND ALKALI METAL CHLORATES AND PERCHLORATES, A SUFFICIENT AMOUNT OF FUEL OF LIQUID OR SOLID TYPE OR BOTH TO BRING THE OVERALL OXYGEN BALANCE OF THE COMPOSITION WITHIN THE RANGE OF +25 TO -50 PERCENT, AN AQUEOUS FLUID PHASE CONTAINING AT LEAST PART OF THE OXIDIZER SALT IN A CONCENTRATED SOLUTION, AND AN ORGANIC COLLOIDAL GALACTOMANNAN THICKENER, THE IMPROVEMENT WHICH COMPRISES INCLUDING THIOUREA TO ACCELERATE DECOMPOSITION OF THE NITRITE GASSING AGENT WHILE CONCOMITANTLY STABILIZING THE THICKENING EFFECTIVENESS OF THE GLACTOMANNA THICKENER.
Claim 3
Dependent Claim
29 words
A composition according to claim 1 in which the thiourea is present in proportion of about 0.05 percent to about 0.3 percent by weight, based on the total composition.
Claim 4
Dependent Claim
14 words
Composition according to claim 1 in which said gassing agent is a nitrous compound.
Claim 5
Dependent Claim
14 words
Composition according to claim 1 in which said gassing agent is a nitrous acid.
Claim 6
Dependent Claim
116 words
Composition according to claim 1 which comprises 10 to 25 percent by weight of water, 40 to 65 percent of at least one strong oxidizer which is selected from the group which consists of ammonium nitrate, sodium nitrate and the ammonium and alkali metal chlorates and perchlorates, 10 to 50 percent of solid particulate fuel which is insoluble to a substantial extent in said water, and a gel-forming material which includes at least 0.01 percent of guar gum, a small amount of cross-linking salt selected from the alkali metal chromates, dichromates and permanganates, and a small amount of polyhydroxylated organic material capable of forming a redox reaction with said cross-linking salt to stabilize the formed gel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |