US3919405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of alkali metal and/or alkaline earth metal hydrides
Assignee: Dynamit Nobel AG
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Filing: 1971-11-26
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Granted: 1975-11-11
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Expires: 1991-11-26
Abstract
Abstract Process of stabilizing alkali and/or alkaline earth metal hydrides which comprises coating the particles of hydride by contacting them with a solution of liquid saturated hydrocarbons, boiling in the range from about 220* to 400*C, in saturated hydrocarbons, boiling in the range from about 20* to 160*C, and thereafter removing the solvent. The resultant novel products, i.e., particles of hydride coated with said saturated hydrocarbons (b.p. about 220*-400*C) are stable, non-sticking and exist in the form of a free flowing powder. The ratio of hydrocarbon to hydride to give stability and flowability is dependent upon the hydride particle size.
Inventors
- 👤 Arnold Lenz
- 👤 Walter Rogler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:57
CPC Classifications
C; C01; C01B; C01B6/00; C01B6/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
A process of stabilizing an alkali metal or alkaline earth metal hydride having a particle size up to about 100 microns against degradation by air or atmospheric moisture comprising admixing said hydride with a solution of a high-boiling liquid saturated hydrocarbon boiling in the range of about 220* to 400*C. and, as a solvent therefor, a lower boiling hydrocarbon boiling in the range of 20* to 160*, and thereafter removing said solvent, leaving said high-boiling liquid saturated hydrocarbon as a coating on the particles of said hydride, the amount of hydride so admixed with each part by weight of said high-boiling hydrocarbon being approximately 40% of the numerical value of the particle size of said hydride, expressed in microns.
Claim 2
Dependent Claim
119 words
A process of stabilizing an alkali metal or alkaline earth metal hydride having a particle size up to about 100 microns against degradation by air or atmospheric moisture comprising admixing said hydride with a solution of a high-boiling liquid saturated hydrocarbon boiling in the range of about 220* to 400*C. and, as a solvent therefor, a lower boiling hydrocarbon boiling in the range of 20* to 160*, and thereafter removing said solvent, leaving said high-boiling liquid saturated hydrocarbon as a coating on the particles of said hydride, the amount of hydride so admixed with each part by weight of said high-boiling hydrocarbon being approximately 40% of the numerical value of the particle size of said hydride, expressed in microns.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein said high-boiling liquid saturated hydrocarbon is a paraffin boiling in the range of about 280* to 320*C.
Claim 4
Dependent Claim
88 words
A FLOWABLE HYDRIDE POWDER STABILIZED AGAINST DEGRADATION BY CONTACT WITH AIR AND ATMOSPHERIC MOISTURE COMPRISING AN HYDRIDE IN POWDER FORM, HAVING A PARTICLE SIZE UP TO ABOUT 100 MICRONS OF METAL SELECTED FROM THE GROUP CONSISING OF ALKALI AND ALKALINE EARTH METALS UNIFORMLY COATED WITH A LIQUID SATURATED HYDROCARBON BOILING IN THE RANGE OF ABOUT 220* TO 400*C., THE AMOUNT OF HYDRIDE COATED WITH EACH PART BY WEIGHT OF SAID HYDROCARBON BEING APPROXIMATELY 40% OF THE NUMERICAL VALUE OF THE PARTICLE SIZE OF SAID HYDRIDE, EXPRESSED IN MICRONS.
Claim 5
Dependent Claim
88 words
A FLOWABLE HYDRIDE POWDER STABILIZED AGAINST DEGRADATION BY CONTACT WITH AIR AND ATMOSPHERIC MOISTURE COMPRISING AN HYDRIDE IN POWDER FORM, HAVING A PARTICLE SIZE UP TO ABOUT 100 MICRONS OF METAL SELECTED FROM THE GROUP CONSISING OF ALKALI AND ALKALINE EARTH METALS UNIFORMLY COATED WITH A LIQUID SATURATED HYDROCARBON BOILING IN THE RANGE OF ABOUT 220* TO 400*C., THE AMOUNT OF HYDRIDE COATED WITH EACH PART BY WEIGHT OF SAID HYDROCARBON BEING APPROXIMATELY 40% OF THE NUMERICAL VALUE OF THE PARTICLE SIZE OF SAID HYDRIDE, EXPRESSED IN MICRONS.
References Cited (Backward Citations)
US2513997A
Cited
US2898195A
Cited
US3222288A
Cited
US3281362A
Cited
US3346506A
Cited
US3407089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |