# US 2014/0193310 A1 · Porous catalytic substrate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193310 A1 - Document ID: US20140193310A1 - Status: Published application - Kind: A1 - Application number: 13/880,034 - Filed: 2012-08-16 - Published: 2014-07-10 - Earliest claimed: 2012-08-16 - Assignees: Empire Technology Development LLC - Inventors: Shigeru Fujino - Web page: https://patentgrep.com/patent/US20140193310A1 ## CPC - B01J 31/26: containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 - B01J 23/06: of zinc, cadmium or mercury - B01J 23/40: of the platinum group metals - B01J 23/48: Silver or gold - B01J 23/72: Copper - B01J 35/60: characterised by their surface properties or porosity - B01J 35/64: Pore diameter - C03B 19/066: {for the production of quartz or fused silica articles (other processes specially adapted for the production of quartz or fused silica articles C03B20/00)} - B01J 35/643: {less than 2 nm} - B01J 35/647: {2-50 nm} - B01J 35/651: {50-500 nm} - B01J 37/0018: {Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)} - B01J 37/0203: {the impregnation liquid containing organic compounds} - B01J 37/0207: {Pretreatment of the support} - B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES ## Abstract Some embodiments in the present disclosure generally relate to catalytic silica-polyvinyl alcohol composites, silica structures therefrom, and/or microreactors therefrom. Some embodiments in the present disclosure generally relate to porous substrates that can have at least one pore with a catalyst associated with the inside of the pore. ## Claims ### Claim 1 A microreactor comprising: a flow path; a sintered silica material which defines the flow path; at least one pore in the sintered silica material, wherein the at least one pore has an average diameter of about 1 nm to about 100 nm; and at least one catalyst within the at least one pore. ### Claim 2 (depends on 1) The microreactor of claim 1, wherein the flow path is transparent or semi-transparent. ### Claim 3 (depends on 2) The microreactor of claim 2, wherein the flow path is optically transparent under vacuumed ultraviolet to infrared range. ### Claim 4 (depends on 1) The microreactor of claim 1, wherein the at least one catalyst comprises at least one transition metal. ### Claim 5 (depends on 4) The microreactor of claim 4, wherein the at least one transition metal comprises at least one of Rh, Pt, Ag, Ir, Au, Cu, or Zn. ### Claim 6 A method of manufacturing a porous catalytic glass, the method comprising: providing a silicon dioxide-polyvinyl alcohol composite; forming a flow path in the composite; applying a catalyst to the flow path; and heating the silicon dioxide-polyvinyl alcohol composite to yield a porous catalytic glass. ### Claim 7 (depends on 6) The method of claim 6, wherein providing a silicon dioxide-polyvinyl alcohol composite comprises: providing a silicon dioxide suspension comprising particles of silicon dioxide; adding polyvinyl alcohol to the silicon dioxide suspension to create a mixture; and drying the mixture to provide the silicon dioxide-polyvinyl alcohol composite. ### Claim 8 (depends on 7) The method of claim 7, wherein drying the mixture comprises drying at a temperature of about 25° C. to about 35° C. ### Claim 9 (depends on 6) The method of claim 6, wherein forming a flow path comprises stamping a flow path into the composite. ### Claim 10 (depends on 6) The method of claim 6, wherein applying the catalyst comprises stamping the flow path into the composite, wherein a surface of the stamp is coated with a catalyst such that when the stamp is contacted to the composite, at least some of the catalyst is transferred to the composite. ### Claim 11 (depends on 6) The method of claim 6, wherein the weight ratio of the silicon dioxide suspension to the polyvinyl alcohol aqueous solution is about 80:20. ### Claim 12 A method of manufacturing a microreactor, the method comprising: providing a porous silica composite comprising an organic/inorganic interface; and molding a microstructure of a microreactor into the composite. ### Claim 13 (depends on 12) The method of claim 12, wherein the porous silica composite comprises polyvinyl alcohol. ### Claim 14 (depends on 13) The method of claim 13, wherein molding comprises stamping the microstructure of the microreactor into the nanocomposite. ### Claim 15 (depends on 14) The method of claim 14, further comprising adding a catalyst to the porous silica composite. ### Claim 16 (depends on 15) The method of claim 15, further comprising forming a flow path in the porous silica composite. ### Claim 17 (depends on 16) The method of claim 16, further comprising applying a catalyst in the porous silica composite, wherein forming the flow path is performed concurrently with applying the catalyst. ### Claim 18 (canceled) ### Claim 19 (canceled) ### Claim 20 (depends on 17) The method of claim 17, further comprising heating the porous silica composite to produce a transparent glass. ### Claim 21 A silica-polyvinyl alcohol composite comprising: at least one silica particle combined with polyvinyl alcohol (“PVA”) so as to form a silica-polyvinyl alcohol composite, wherein the composite comprises a plurality of pores, wherein the pores have an average diameter of about 1 nm to about 300 nm; and a catalyst, wherein the catalyst is on an outer surface of the silica-polyvinyl alcohol composite. ### Claim 22 (depends on 21) The silica-polyvinyl alcohol composite of claim 21, wherein the composite comprises a flow path, and wherein the catalyst is a layer within the flow path. ### Claim 23 (canceled) ### Claim 24 (depends on 21) The silica-polyvinyl alcohol composite of claim 21, wherein the composite comprises at least twice as much silica as polyvinyl alcohol, by weight. ### Claim 25 (canceled) ### Claim 26 (depends on 21) The silica-polyvinyl alcohol composite of claim 21, wherein a diameter of the at least one silica particle is about 1 nm to about 50 nm. ### Claim 27 (depends on 21) The silica-polyvinyl alcohol composite of claim 21, wherein the silica-polyvinyl alcohol composite comprises an organic/inorganic interface. ### Claim 28 (canceled) ### Claim 29 (depends on 21) The silica-polyvinyl alcohol composite of claim 21, wherein the catalyst is at least one of Rh, Pt, Ag, Ir, Au, Cu, or Zn. ### Claim 30 A microreactor comprising: a chamber a sintered silica material which defines the chamber; at least one pore in the sintered silica material, wherein the at least one pore has an average diameter of about 1 nm to about 100 nm; and at least one catalyst within the at least one pore.