Mechanochemical process for the production of BP, B12P2 and mixtures thereof, in particular as nanopowders
US-10519039-B2 · Dec 31, 2019 · US
Production of boron phosphide by reduction of boron phosphate with an alkaline metal
US10106415B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10106415-B2 |
| Application number | US-201415107380-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 23, 2014 |
| Priority date | Dec 23, 2013 |
| Publication date | Oct 23, 2018 |
| Grant date | Oct 23, 2018 |
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Abstract
Official abstract text for this publication.
The present invention concerns a process for the production of boron phosphide BP comprising the reduction of boron phosphate BPO 4 with at least one alkaline earth metal (EA) according to Equation (1): BPO 4 +4 EA→BP+4 EA(O)(1).
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for the synthesis of boron phosphide (BP), said process comprising: the reduction of boron phosphate (BPO 4 ) with at least one alkaline earth metal (EA) by mixing boron phosphate and the at least one alkaline earth metal, according to Equation (1): BPO 4 +4EA→BP+4EA(O) (1), wherein said process is a self-propagating high temperature synthesis, and wherein a part of a mixture comprising boron phosphate and the at least one alkaline earth metal is heated for initiating locally the reaction between boron phosphate and the at least one alkaline earth metal. 2. The process according to claim 1 wherein the at least one alkaline earth metal is magnesium, calcium, or mixture thereof. 3. The process of claim 2 , wherein the alkaline earth metal is magnesium. 4. The process according to claim 1 , wherein the reaction is initiated by heating the mixture at a temperature comprised between 800 and 1100 K. 5. The process of claim 4 , wherein the reaction is initiated by heating the mixture at a temperature of 1000 K. 6. The process according to claim 1 , wherein the reaction is initiated by heating the mixture between 10 and 60 seconds. 7. The process according to claim 1 , wherein the mixture comprising boron phosphate and the at least one alkaline earth metal further comprises a chemically inert diluent. 8. The process according to claim 7 wherein the amount of the chemically inert diluent represents between 40 and 60% by weight of the total weight of the mixture. 9. The process of claim 7 , wherein the chemically inert diluent is sodium chloride. 10. The process of claim 7 , wherein the amount of the chemically inert diluent represents between 50% by weight of the total weight of the mixture. 11. The process according to claim 1 wherein the ratio of boron phosphate to the at least one alkaline earth metal is comprised between 1:3.8 and 1:4.2. 12. The process according to claim 1 comprising the steps of: (a) mixing boron phosphate, the at least one alkaline earth metal, and optionally a chemically inert diluent, (b) compressing the mixture to form a compact such as a pellet or an ingot, (c) heating the compressed mixture obtained in step (b) for initiating locally the reaction between boron phosphate and the at least one alkaline earth metal, and (d) recovering boron phosphide. 13. The process of claim 1 , wherein the ratio of boron phosphate to the at least one alkaline earth metal is comprised between 1:4 and 1:4.1. 14. The process according to claim 1 , wherein the self-propagating high temperature synthesis is realized by using a tungsten filament, a graphite plate heated by Joule effect, a flame, or a laser pulse.
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- C01B25/084Primary
of boron · CPC title
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Frequently asked questions
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- What does patent US10106415B2 cover?
- The present invention concerns a process for the production of boron phosphide BP comprising the reduction of boron phosphate BPO 4 with at least one alkaline earth metal (EA) according to Equation (1): BPO 4 +4 EA→BP+4 EA(O)(1).
- Who is the assignee on this patent?
- Univ Pierre Et Marie Curie Paris 6, Centre Nat Rech Scient, Univ Paris Xiii Paris Nord Villetaneuse, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C01B25/084. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 23 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).