# US 10,501,328 B2 · Method for producing beta zeolite > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,328 B2 - Document ID: US10501328B2 - Status: Granted - Kind: B2 - Application number: 15/549,458 - Filed: 2016-02-08 - Published: 2018-01-25 - Granted: 2019-12-10 - Earliest claimed: 2015-02-09 - Assignees: Mistui Mining & Smelting Co., Ltd.; The University of Tokyo - Applicants: Unizeo Co., Ltd.; The University of Tokyo - Inventors: Keiji Itabashi; Shanmugam Palani Elangovan; Kyosuke Sodeyama; Tatsuya Okubo - Web page: https://patentgrep.com/patent/US10501328B2 ## CPC - C01B 39/46: Other types characterised by their X-ray diffraction pattern and their defined composition {(C01B39/023, C01B39/026, C01B39/06 take precedence)} - C01B 39/48: using at least one organic template directing agent - B01J 29/7007: {Zeolite Beta} - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS ## Abstract Provided is a method for producing a beta zeolite, which is a seed crystal addition method that is capable of reducing the environmental load as much as possible. A method for producing a beta zeolite according to the present invention comprises a step wherein a reaction mixture that contains a silica source, an alumina source, an alkali source and water and a seed crystal that is composed of a beta zeolite are mixed with each other and heated. A beta zeolite which comprises particles having a particle size of 10 μm or less in an amount of 90% or more on a volume basis in the particle size distribution as determined by a laser diffraction/scattering particle size distribution measuring method, and which is synthesized without using an organic structure-directing agent is used as the seed crystal. ## Claims ### Claim 1 A method for producing a beta zeolite, comprising: mixing a reaction mixture comprising a silica source, an alumina source, an alkali source and water with a seed crystal comprising a beta zeolite and heating the mixture, wherein a beta zeolite synthesized without using an organic structure-directing agent and comprising particles having a particle size of 10 μm or less in an amount of 90% or more on a volume basis in the particle size distribution as determined by a laser diffraction/scattering particle size distribution measuring method is used as the seed crystal. ### Claim 2 (depends on 1) The method for producing a beta zeolite according to claim 1, wherein a beta zeolite synthesized using an organic structure defining agent and calcined is further used as the seed crystal. ### Claim 3 (depends on 2) The method for producing a beta zeolite according to claim 2, wherein, in the seed crystal, the content of the beta zeolite synthesized without using an organic structure defining agent is 10% by mass or more and less than 100% by mass. ### Claim 4 (depends on 3) The method for producing a beta zeolite according to claim 3, wherein compositions of the reaction mixture represented by molar ratios are in ranges: SiO2/Al2O3=8 to 40 Na2O/SiO2=0.05 to 0.3 H2O/SiO2=5 to 50. ### Claim 5 (depends on 3) The method for producing a beta zeolite according to claim 3, wherein the seed crystal is mixed into the reaction mixture in a state of solid-liquid mixture. ### Claim 6 (depends on 3) The method for producing a beta zeolite according to claim 3, wherein the mixed amount of the seed crystal is 1% by mass or more and 30% by mass or less relative to the mass of the silica source contained in the reaction mixture. ### Claim 7 (depends on 3) The method for producing a beta zeolite according to claim 3, wherein the SiO2/Al2O3 ratio of the seed crystal is 8 or more and 30 or less. ### Claim 8 (depends on 2) The method for producing a beta zeolite according to claim 2, wherein compositions of the reaction mixture represented by molar ratios are in ranges: SiO2/Al2O3=8 to 40 Na2O/SiO2=0.05 to 0.3 H2O/SiO2=5 to 50. ### Claim 9 (depends on 2) The method for producing a beta zeolite according to claim 2, wherein the seed crystal is mixed into the reaction mixture in a state of solid-liquid mixture. ### Claim 10 (depends on 2) The method for producing a beta zeolite according to claim 2, wherein the mixed amount of the seed crystal is 1% by mass or more and 30% by mass or less relative to the mass of the silica source contained in the reaction mixture. ### Claim 11 (depends on 2) The method for producing a beta zeolite according to claim 2, wherein the SiO2/Al2O3 ratio of the seed crystal is 8 or more and 30 or less. ### Claim 12 (depends on 1) The method for producing a beta zeolite according to claim 1, wherein compositions of the reaction mixture represented by molar ratios are in ranges: SiO2/Al2O3=8 to 40 Na2O/SiO2=0.05 to 0.3 H2O/SiO2=5 to 50. ### Claim 13 (depends on 12) The method for producing a beta zeolite according to claim 12, wherein the seed crystal is mixed into the reaction mixture in a state of solid-liquid mixture. ### Claim 14 (depends on 12) The method for producing a beta zeolite according to claim 12, wherein the mixed amount of the seed crystal is 1% by mass or more and 30% by mass or less relative to the mass of the silica source contained in the reaction mixture. ### Claim 15 (depends on 12) The method for producing a beta zeolite according to claim 12, wherein the SiO2/Al2O3 ratio of the seed crystal is 8 or more and 30 or less. ### Claim 16 (depends on 1) The method for producing a beta zeolite according to claim 1, wherein the seed crystal is mixed into the reaction mixture in a state of solid-liquid mixture. ### Claim 17 (depends on 16) The method for producing a beta zeolite according to claim 16, wherein the mixed amount of the seed crystal is 1% by mass or more and 30% by mass or less relative to the mass of the silica source contained in the reaction mixture. ### Claim 18 (depends on 16) The method for producing a beta zeolite according to claim 16, wherein the SiO2/Al2O3 ratio of the seed crystal is 8 or more and 30 or less. ### Claim 19 (depends on 1) The method for producing a beta zeolite according to claim 1, wherein the mixed amount of the seed crystal is 1% by mass or more and 30% by mass or less relative to the mass of the silica source contained in the reaction mixture. ### Claim 20 (depends on 1) The method for producing a beta zeolite according to claim 1, wherein the SiO2/Al2O3 ratio of the seed crystal is 8 or more and 30 or less.