# US 2014/0190892 A1 · Strontium and cesium specific ion-exchange media > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190892 A1 - Document ID: US20140190892A1 - Status: Published application - Kind: A1 - Application number: 14/148,929 - Filed: 2014-01-07 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: BASF SE - Applicants: BASF Corporation - Inventors: Alfonse Maglio; David Durocher - Web page: https://patentgrep.com/patent/US20140190892A1 ## CPC - B01J 20/10: comprising silica or silicate - B01J 20/28004: {Sorbent size or size distribution, e.g. particle size} - B01J 20/2803: {Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products} - B01J 20/28047: {Gels} - B01J 20/28061: {being in the range 100-500 m2/g} - B01J 20/28071: {being less than 0.5 ml/g} - B01J 39/14: Base exchange silicates, e.g. zeolites - C02F 1/281: {using inorganic sorbents} - G21F 9/10: by flocculation - G21F 9/12: by absorption; by adsorption; by ion-exchange - C02F 2101/006: {Radioactive compounds} - C02F 2103/06: Contaminated groundwater or leachate - C02F 2103/08: Seawater, e.g. for desalination - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - G21F: PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR (radiation protection by pharmaceutical means A61K8/00, A61Q17/04; in cosmonautic vehicles B64G1/54; combined with a reactor G21C11/00; combined with X-ray tubes H01J35/16; combined with X-ray apparatus H05G1/02) ## Abstract This invention is directed to amorphous and crystalline titanosilicate materials that have an unexpected selectivity for cesium and strontium, especially in the presence of high levels of competing ions. The titanosilicates of this invention show very high, unexpected selectivity in the presence of such competing cations such as sodium, calcium, magnesium and potassium, such as present in seawater. ## Claims ### Claim 1 A method of removing di- and/or tri-valent radionuclides from a water stream which contains lighter Group I and Group II cations comprising: contacting said water stream with a titanium silicate. ### Claim 2 (depends on 1) The method of claim 1, wherein said titanium silicate is amorphous. ### Claim 3 (depends on 2) The method of claim 2, wherein the titanium silicate has a Si to Ti ratio of from about 2:1 to 0.5-1. ### Claim 4 (depends on 3) The method of claim 3, wherein said Si to Ti ratio is from about 1.5:1 to 0.9:1. ### Claim 5 (depends on 1) The method of claim 1, wherein said titanium silicate is crystalline ETS-4. ### Claim 6 (depends on 2) The method of claim 2, wherein said amorphous silicate is present as binder-free granules. ### Claim 7 (depends on 5) The method of claim 5, wherein said ETS-4 is in the form of granules containing a binder. ### Claim 8 (depends on 1) The method of claim 1, wherein said water stream comprises seawater. ### Claim 9 (depends on 1) The method of claim 1, wherein said water stream comprises surface or ground water. ### Claim 10 (depends on 9) The method of claim 9, wherein said water stream is purified to produce potable water, or for remediation of water streams which have been contaminated with said radionuclides. ### Claim 11 (depends on 1) The method of claim 1, wherein said radionuclides comprise cesium and/or strontium. ### Claim 12 (depends on 1) The method of claim 1, wherein said water stream is from nuclear fuel pool water, or from a seawater flooded nuclear power plant for generating electricity. ### Claim 13 (depends on 1) The method of claim 1, wherein said cations comprise sodium, potassium, calcium, magnesium, or mixtures thereof. ### Claim 14 (depends on 1) The method of claim 1, wherein the water stream contains at least 10 times the amount of Group I and Group II cations relative to said radionuclides on an equivalent basis. ### Claim 15 (depends on 1) The method of claim 1, wherein the water stream contains at least 100 times the amount of Group I and Group II cations relative to said radionuclides on an equivalent basis. ### Claim 16 (depends on 1) The method of claim 1, wherein the water stream contains at least 1,000 times the amount of Group I and Group II cations relative to said radionuclides on an equivalent basis. ### Claim 17 A method of removing di- and/or tri-valent radionucleotides from a water stream which contains light Group I and Group II cations comprising: contacting said water stream with a tin silicate. ### Claim 18 (depends on 14) The method of claim 14, wherein said water stream comprises seawater. ### Claim 19 (depends on 14) The method of claim 14, wherein said water stream comprises surface or ground water. ### Claim 20 (depends on 14) The method of claim 14, wherein said radionuclides comprise cesium and/or strontium.