US4047989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the recovery of blasting oil from effluents from the production of nitroglycerine-containing explosives
Assignee: Dyno Industrier AS
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Filing: 1976-05-18
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Granted: 1977-09-13
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Expires: 1996-05-18
Abstract
Abstract Blasting oil contained in the effluent from the production of explosives containing nitroglycerine is recovered by extracting with nitroaromatics which make part of the final explosive, the resulting extract being used completely in the explosive production. Residues of nitroaromatics may be removed from the purified effluent by means of an extraction liquid being sparely water-soluble, such as toluene or xylene or a mixture thereof.
Inventors
- 👤 Sverre Ludvik Ostern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:50
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/02; C06; C06B; C06B21/00; C06B21/0091; C06B25/00; C06B25/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
A method for recovering blasting oil selected from the group consisting of glycol dinitrate, glycerine trinitrate and mixtures thereof from an effluent resulting from the production of blasting oil-containing explosives which comprises extracting the blasting oil from the effluent with a liquid nitroaromatic in an extraction apparatus, said nitroaromatic liquid being a component used in the blasting oil-containing explosive such that the blasting oil-nitroaromatic extract can be utilized for the preparation of the final explosive.
Claim 2
Independent Claim
75 words
A method for recovering blasting oil selected from the group consisting of glycol dinitrate, glycerine trinitrate and mixtures thereof from an effluent resulting from the production of blasting oil-containing explosives which comprises extracting the blasting oil from the effluent with a liquid nitroaromatic in an extraction apparatus, said nitroaromatic liquid being a component used in the blasting oil-containing explosive such that the blasting oil-nitroaromatic extract can be utilized for the preparation of the final explosive.
Claim 3
Dependent Claim
23 words
A method according to claim 1, wherein the nitroaromatic is selected from the group consisting of nitrated toluene, nitrated xylene and mixtures thereof.
Claim 4
Dependent Claim
33 words
A method according to claim 1, wherein the blasting oil-nitroaromatic extract is further extracted with a liquid selected from the group consisting of toluene, xylene and mixtures thereof to remove the nitroaromatics therefrom.
References Cited (Backward Citations)
US3778320A
Cited
US3975452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |