# US 2010/0075847 A1 · Hydrotalcite-like Particulate Material and Method for Production Thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0075847 A1 - Document ID: US20100075847A1 - Status: Published application - Kind: A1 - Application number: 12/375,904 - Filed: 2007-07-31 - Published: 2010-03-25 - Earliest claimed: 2006-07-31 - Assignees: JDC Corporation - Inventors: Takeo Asakura; Mutsuhiro Ono; Takashi Kajimoto - Web page: https://patentgrep.com/patent/US20100075847A1 ## CPC - C01F 7/785: Hydrotalcite - B01J 20/041: {Oxides or hydroxides} - B01J 20/08: comprising aluminium oxide or hydroxide; comprising bauxite - B01J 41/10: Inorganic material - C01P 2002/60: Compounds characterised by their crystallite size - C01P 2006/82: water content - Y10T 428/2982: Particulate matter [e.g., sphere, flake, etc.] - C01F: COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; sulfides or polysulfides of magnesium, calcium, strontium, or barium C01B17/42; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals C01B21/082; amides or imides of silicon C01B21/087}; metal {imides or} amides C01B21/092, {C01B21/0923}; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanic acid C01C3/14; salts of cyanamide C01C3/16; thiocyanates C01C3/20; {double sulfates of magnesium with sodium or potassium C01D5/12; with other alkali metals C01D15/00, C01D17/00}) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A hydrotalcite-like granular material having a grain size of 0.24 mm or larger is produced by drying a material that contains at least a hydrotalcite-like substance and that has a water content of 70% or lower at equal to or lower than a temperature at which the hydrotalcite-like substance is dehydrated of crystal water contained therein, preferably at 90° C. or higher and 110° C. or lower, such that the resulting hydrotalcite-like granular material has a water content of 10% or higher. In this manner, a hydrotalcite-like granular material that has a stable morphology and a high anion exchange performance and that can be produced at a low cost can be produced. ## Claims ### Claim 1 A hydrotalcite-like granular material, wherein the hydrotalcite-like granular material originates from drying of a material that contains at least a hydrotalcite-like substance and water at equal to or lower than a temperature at which the hydrotalcite-like substance is dehydrated of crystal water contained therein. ### Claim 2 A hydrotalcite-like granular material, wherein the hydrotalcite-like granular material originates from drying of a material that contains at least a hydrotalcite-like substance and that has a water content of 70% or lower at equal to or lower than a temperature at which the hydrotalcite-like substance is dehydrated of crystal water contained therein. ### Claim 3 A hydrotalcite-like granular material, wherein the hydrotalcite-like granular material, when prepared in a quantity of 10 g, adsorbs fluorine ions (F−) by an amount of 8 mg/g or more, when the hydrotalcite-like granular material of that quantity is added to and stirred for 60 minutes in a fluorine solution of a quantity of 1000 ml, whose fluorine ion (F−) concentration is 116 mg/l and which is adjusted to 20° C. ### Claim 4 (depends on 1) The hydrotalcite-like granular material according to claim 1, wherein the drying is performed at 90° C. or higher and 110° C. or lower. ### Claim 5 (depends on 1) The hydrotalcite-like granular material according to claim 1, wherein the drying is performed under a condition that an ambient humidity is 90% or higher. ### Claim 6 (depends on 1) The hydrotalcite-like granular material according to claim 1, wherein the hydrotalcite-like granular material has a water content of 10% or higher. ### Claim 7 (depends on 1) The hydrotalcite-like granular material according to claim 1, wherein the hydrotalcite-like granular material contains a chloride. ### Claim 8 (depends on 1) The hydrotalcite-like granular material according to claim 1, wherein the hydrotalcite-like granular material contains NaCl. ### Claim 9 (depends on 1) The hydrotalcite-like granular material according to claim 1, wherein the hydrotalcite-like granular material is produced from a hydrotalcite-like substance having a crystallite size of 20 nm or smaller. ### Claim 10 (depends on 1) The hydrotalcite-like granular material according to claim 1, wherein the hydrotalcite-like granular material adsorbs and immobilizes a cation. ### Claim 11 (depends on 1) The hydrotalcite-like granular material according to claim 1, wherein the hydrotalcite-like granular material has a grain size of 0.24 mm or larger. ### Claim 12 A method for production of a hydrotalcite-like granular material, comprising drying a material that contains at least a hydrotalcite-like substance and water at equal or lower than a temperature at which the hydrotalcite-like substance is dehydrated of crystal water contained therein. ### Claim 13 A method for production of a hydrotalcite-like granular material, comprising drying a material that contains at least a hydrotalcite-like substance and that has a water content of 70% or lower at equal to or lower than a temperature at which the hydrotalcite-like substance is dehydrated of crystal water contained therein. ### Claim 14 (depends on 12) The method for production of the hydrotalcite-like granular material according to claim 12, wherein the drying is performed such that the hydrotalcite-like granular material maintains a water content of 10% or higher. ### Claim 15 (depends on 12) The method for production of the hydrotalcite-like granular material according to claim 12, wherein the hydrotalcite-like substance that is used has a crystallite size of 20 nm or smaller. ### Claim 16 (depends on 12) The method for production of the hydrotalcite-like granular material according to claim 12, wherein the drying is performed at 90° C. or higher and 110° C. or lower.