Compositions and processes for synthesizing borohydride compounds
First Claim
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1. A process for producing borohydride compounds, comprising:
- (A) reacting a borate of the formula YBO2 with CO2 and H2O to obtain YHCO3 and B2O3;
(B) converting the YHCO3 to Y2O, CO2, and H2O;
(C) reacting the B2O3 with C and X2 to obtain BX3 and CO2;
(D) reacting methane with Y2O to obtain Y, carbon monoxide and H2;
(E) reacting the Y with H2 to obtain YH;
(F) reacting the BX3 with the YH to obtain YHBX3;
(G) separately reacting BX3 with H2 to obtain B2H6 and HX; and
(H) reacting the YHBX3 with B2H6 to obtain YBH4 and BX3, wherein Y is selected from the group consisting of the alkali metals, pseudo-alkali, an ammonium ion, and quaternary amines of formula NR4+, wherein R is independently selected from H and straight or branched C1 to C4 alkyl groups; and
wherein X is selected from the group consisting of halides, alcohols, alkoxides, chalcogens, and chalcogenides.
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Abstract
The present invention relates to compositions and processes for producing borohydride compounds. In particular, the present invention provides efficient processes and compositions for the large-scale production of borohydride compounds.
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Citations
28 Claims
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1. A process for producing borohydride compounds, comprising:
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(A) reacting a borate of the formula YBO2 with CO2 and H2O to obtain YHCO3 and B2O3;
(B) converting the YHCO3 to Y2O, CO2, and H2O;
(C) reacting the B2O3 with C and X2 to obtain BX3 and CO2;
(D) reacting methane with Y2O to obtain Y, carbon monoxide and H2;
(E) reacting the Y with H2 to obtain YH;
(F) reacting the BX3 with the YH to obtain YHBX3;
(G) separately reacting BX3 with H2 to obtain B2H6 and HX; and
(H) reacting the YHBX3 with B2H6 to obtain YBH4 and BX3, wherein Y is selected from the group consisting of the alkali metals, pseudo-alkali, an ammonium ion, and quaternary amines of formula NR4+, wherein R is independently selected from H and straight or branched C1 to C4 alkyl groups; and
wherein X is selected from the group consisting of halides, alcohols, alkoxides, chalcogens, and chalcogenides. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
wherein X is selected from the group consisting of F, Cl, Br, I, At, —
OH, a C1 to C4 alkoxide, O, S, Se, Te, Po, —
SR, —
SeR, and —
TeR, wherein R is H or a straight or branched C1 to C4 alkyl group.
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4. The process according to claim 3, wherein Y is selected from the group consisting of Na, Li, and K.
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5. The process according to claim 1, wherein Y is an alkaline earth metal;
- and wherein YBO2 is replaced with Y(BO2)2, YHCO3 is replaced with Y(HCO3)2, Y2O is replaced with YO, YH is replaced with YH2, YHBX3 is replaced with Y(HBX3)2, and YBH4 is replaced with Y(BH4)2.
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6. The process according to claim 1, wherein the BX3 of step (G) is hydrogenated with an aldehyde selected from the group consisting of formaldehyde, benzaldehyde, acetaldehyde, and mixtures thereof.
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7. The process according to claim 1, wherein the BX3 and YHCO3 are obtained by the process comprising:
- reacting a borate ore of the formula Y2B2O4 with CO2 and H2O to obtain YHCO3 and B(OH)3; and
reacting the B(OH)3 with HX to obtain BX3 and H2O.
- reacting a borate ore of the formula Y2B2O4 with CO2 and H2O to obtain YHCO3 and B(OH)3; and
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8. The process according to claim 1, wherein the B2O3 and YHCO3 are obtained by the process comprising reacting a borate ore of the formula Y2B2O4 with CO2 and water to obtain YHCO3 and B2O3.
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9. The process according to claim 1, wherein the X is independently selected to be the same or different in each applicable step.
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10. The process according to claim 1, wherein steps (B) and (D) are substituted with the following steps (B1) and (D1):
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(B1) converting YCO3 to Y2CO3, water and carbon dioxide; and
(D1) reacting the Y2CO3 with carbon to obtain 2Y and carbon monoxide.
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11. The process according to claim 1, wherein the BX3 produced in step (H) is recycled for use in steps (F) and (G).
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12. The process according to claim 1, wherein the H2 produced in step (D) is recycled for use in steps (E) and (G).
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13. The process according to claim 1, wherein carbon dioxide produced in steps (B) and (C) is recycled for use in step (A).
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14. The process according to claim 1, further comprising
reacting methane and water to produce H2 and carbon monoxide; -
combining the carbon monoxide produced in the previous step and in step (D);
reacting the combined carbon monoxide with water to produce additional H2 and carbon dioxide;
recycling the H2 for use in steps (E) and (G); and
recycling the carbon dioxide for use in step (A).
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15. The process according to claim 1, further comprising reacting the HX produced in step (G) with O2 and CuX (solid) to produce X2 and water, and recycling the X2 for use in step (C).
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16. The process according to claim 1, wherein steps (D) to (H) are replaced with the following steps (D2) and (E2):
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(D2) reacting the BX3 with H2 to obtain B2H6 and HX; and
(E2) reacting B2H6 with the Y2O to obtain a YBH4 and a YBO2.
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17. The process according to claim 16, wherein Y is an alkaline earth metal;
- and wherein YBO2 is replaced with Y(BO2)2, YHCO3 is replaced with Y(HCO3)2, and Y2O is replaced with YO.
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18. The process according to claim 16, wherein step (C) is replaced with the following step (C2):
- reacting the B2O3 with methane and X2 to obtain BX3, CO2, and H2.
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19. The process according to claim 16, wherein the BX3 of step (D2) is hydrogenated with an aldehyde selected from the group consisting of formaldehyde, benzaldehyde, acetaldehyde, and mixtures thereof.
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20. The process according to claim 16, wherein the BX3 and YHCO3 are obtained by the process comprising:
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reacting a borate ore of the formula Y2B2O4 with CO2 and H2O to obtain YHCO3 and B(OH)3; and
reacting the B(OH)3 with HX to obtain BX3 and H2O.
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21. The process according to claim 16, wherein the B2O3 and YHCO3 are obtained by the process comprising reacting a borate ore of the formula Y2B2O4 with CO2 and water to obtain YHCO3 and B2O3.
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22. The process according to claim 16, wherein X is independently selected to be the same or different in each applicable step.
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23. The process according to claim 16, wherein the carbon dioxide produced in steps (B) and (C) are recycled for use in step (A).
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24. The process according to claim 16, wherein the YBO2 produced in step (E2) is recycled for use in step (A).
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25. The process according to claim 16, further comprising:
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reacting methane and water to produce H2 and carbon monoxide;
reacting the carbon monoxide with water to produce additional H2 and carbon dioxide;
recycling the H2 for use in step (D2); and
recycling the carbon dioxide for use in step (A).
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26. A borohydride compound obtained by the process according to claim 2.
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27. A borohydride compound obtained by the process according to claim 15.
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28. A borohydride compound obtained by the process according to claim 15.
Specification