US 12,291,451 B2
Process for producing and regenerating hydrogen carrier compounds
Benjamin Burcher, Saint-Jorioz (FR); Vincent Lome, Chateaurenard (FR); and Remy Benoit, Villeneuves-les-Avignon (FR)
Assigned to HYSILABS SAS, (FR)
Appl. No. 17/770,526
Filed by HYSILABS SAS, Aix-en-Provence (FR)
PCT Filed Oct. 29, 2020, PCT No. PCT/EP2020/080468
§ 371(c)(1), (2) Date Apr. 20, 2022,
PCT Pub. No. WO2021/084046, PCT Pub. Date May 6, 2021.
Claims priority of application No. 19306415 (EP), filed on Oct. 31, 2019; and application No. 20305574 (EP), filed on Jun. 2, 2020.
Prior Publication US 2023/0002220 A1, Jan. 5, 2023
Int. Cl. C01B 3/00 (2006.01); C01B 33/04 (2006.01); C01B 33/113 (2006.01); C01B 33/12 (2006.01)
CPC C01B 3/0015 (2013.01) [C01B 33/04 (2013.01); C01B 33/113 (2013.01); C01B 33/126 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A process for the production of a liquid siloxane hydrogen carrier compound,
said process comprising the following consecutive steps:
providing a silica compound and/or a silicate compound,
either subjecting the silica compound and/or silicate compound to a reduction step 2(a) to produce silicon monoxide (SiO), or
subjecting the silica compound and/or silicate compound to an elemental silicon- mediated disproportionation step 2(b) to produce silicon monoxide (SiO), or
subjecting the silica compound and/or silicate compound to a hydrogenation/dehydration step 2(c) to produce silanone (H2SiO), or
subjecting the silica compound and/or silicate compound to a partial hydrogenation step 2(d) to produce formosilicic acid (HSi(O)(OH)), or
subjecting the silica compound and/or silicate compound to a semi-hydrogenation step 2(e) to produce dihydroxysilane (H2Si(OH)2), or
subjecting the silica compound and/or silicate compound to a full hydrogenation step 2(f) to produce silane (SiH4),
then
subjecting silicon monoxide (SiO) obtained from step 2(a) or 2(b) to a hydrogenation step 3(a) to produce silanone (H2SiO), or
subjecting silicon monoxide (SiO) obtained from steps 2(a) and/or 2(b) to a hydration step 3(b) to produce formosilicic acid (HSi(O)(OH)), and/or
subjecting formosilicic acid (HSi(O)(OH)) obtained from steps 2(d) and/or 3(b) to a hydrogenation and dehydration step 3(c) to produce silanone (H2SiO), and/or
subjecting formosilicic acid (HSi(O)(OH)) obtained from steps 2(d) and/or 3(b) to a hydrogenation step 3(d) to produce dihydroxysilane (H2Si (OH)2), and/or
subjecting silanone (H2SiO) obtained from steps 2(c) and/or 3(a) and/or 3(c) to a hydration step 3(e) to produce dihydroxysilane (H2Si(OH)2), or
subjecting silane (SiH4) obtained from step 2(f) to a partial hydrolysis step 3(f) to produce dihydroxysilane (H2Si(OH)2), or
proceeding directly to the next step with the dihydroxysilane (H2Si(OH)2) obtained from step 2(e), or
proceeding directly to the next step with the silanone (H2SiO) obtained from step 2(c), or
proceeding directly to the next step with the silane (SiH4) obtained from step 2(f),
then
subjecting silanone (H2SiO) obtained from steps 2(c) and/or 3(a) and/or 3(c) to a polyaddition step 4(a) to produce the said liquid siloxane hydrogen carrier compound, or
subjecting dihydroxysilane (H2Si(OH)2) obtained from steps 2(e) and/or 3(d) and/or 3(e) and/or 3(f) to a polycondensation step 4(b) to produce the said liquid siloxane hydrogen carrier compound, or
subjecting silane (SiH4) obtained from step 2(f) to an oxygen-mediated partial oxidation step 4(c) to produce the said liquid siloxane hydrogen carrier compound.