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5 line zeolite and (3) only cations which have insufficient energy of activation for entry of said ‘cations into said crystalline zeolite, exchanging hydrogen ions in said solu tion ‘for at least a part of said silver cations, and precipi tating at least a part of said silver cations in said zeolite. 5.A methodforhydrogenion-exchangingsilveranal cite comprising bringing into intimate contact With said silver analcite an aqueous solution containing (1) hydro gen ions in a concentration not substantially greater than the hydrogen ion concentration of Water, (2) halide ions and (3) at least one cation selected from the group con sisting of tetraethyl ammonium ion and cesium ion, ex~ exchanging hydrogen ions in said solution for at least ver zeolite L and (3) only cations which permit hydrogen ions in said aqueous solution to compete successfully for at least a part of the exchange sites in said silver zeolite L, exchanging hydrogen ions in said solution for at least a part of said silver cations, and precipitating at least a part of said silver cations. 11.A methodforhydrogenion-exchangingsilverzeo~ lite T comprising bringing said silver zeolite T into in timate contact With an aqueous solution containing (1) hydrogen ions in a concentration not substantially greater than the hydrogen ion concentration of water, (2) anions which form precipitates with the silver cations of said silver zeolite T and (3) only cations which permit hydro gen ions in said aqueous solution to compete successfully silverhalide. 6. A method for hydrogen ion-exchanging silver zeo lite A comprising bringing into intimate contact with saidsilverzeoliteA anaqueoussolutioncontainingtetra methyl ammonium halide and hydrogen ions in a con centration not substantially greater than the hydrogen ion concentration of water, exchanging hydrogen ions in said solution for at least a part of the silver in said silver zeolite A, and precipitating at least part of the silver in said silver zeolite A as silver halide. 7. A method for hydrogen ion-exchanging silver zeo liteX comprisingbringingintointimatecontactwithsaid silver zeolite X an aqueous solution containing tetra~ methyl ammonium halide and hydrogen ions in a concen lite T, exchanging hydrogen ions in said solution for at least a part of said silver cations, and precipitating at least a part of said silver cations. 12. A method for hydrogen ion-exchanging silver erionite comprising bringing into intimate contact with said silver erionite an aqueous solution containing tetra methyl ammonium halide, ‘and hydrogen ions in a con centration not substantially greater than the hydrogen ion concentration of water, exchanging hydrogen ions in said 25 solutionforatleastpartofthesilverinsaidsilvererionite, and precipitating at least part of the silver in said silver erionite as silverhalide. 13. A method for hydrogen ion-exchanging silver zeoliteY comprisingbringingintointimatecontactwith 3,059,993 part of the silver in said silver analcite, and precipitat ingatleastpartofthesilverinsaidsilveranalciteas 15 foratleastapartoftheexchangesitesinsaidsilverzeo trationnotsubstantiallygreaterthanthehydrogenion concentrationofwater,exchanginghydrogenionsinsaid30 saidsilverzeoliteYanaqueoussolutioncontainingtetra solution for at least a part of the silver in said silver zeo lite X, and precipitating at least part of the silver in said silverzeoliteX assilverhalide. methyl ammonium halide, and hydrogen ions in a con centration not substantially greater than the hydrogen ion concentration of water, exchanging hydrogen ions 8.Amethodforhydrogenion-exchangingsilvererionite35 insaidsolutionforatleastpartofthesilverinsaidsilver comprising bringing said silver erionite into intimate con tact With an aqueous solution containing (1) hydrogen ions in a concentration not substantially greater than the hydrogen ion concentration of Water, (2) anions which formprecipitateswiththesilvercationsofsaidsilver40 saidsilverzeoliteLanaqueoussolutioncontainingtetra methyl ammonium halide, and hydrogen ions in a con centration not substantially greater than the hydrogen ion concentration of water, exchanging hydrogen ions in said solution for at least part of the silver in said silver erionite and (3) only cations which permit hydrogen ions in said aqueous solution to compete successfully for at least a part of the exchange sites in said silver erionite, exchanging hydrogen ions in said solution for at least apartofsaidsilvercations,andprecipitatingatleasta 45 zeoliteL,andprecipitatingatleastpartofthesilverin part of said silver cations. 9.A methodforhydrogenion-exchangingsilverZeo saidsilverzeoliteL assilverhalide. 15.A methodforhydrogenion-exchangingsilverzeo lite T ‘comprising bringing into intimate contact with said silver zeolite T an aqueous solution containing tetrameth liteY comprisingbringingsaidsilverzeoliteY intoin— timate contact with an aqueous solution containing (1) hydrogen ions in a concentration not substantially greater 50 yl ammonium halide, ‘and hydrogen ions in a concen than the hydrogen ion concentration of Water, (2) anions which form precipitates with the silver cations of said silverzeoliteY and(3)onlycationswhichpermithy drogen ions in said aqueous solution to compete success 55 zeolite T as silver halide. fully for at least a part of the exchange sites in said silver zeolite Y, exchanging hydrogen ions in said solution for at least a part of said silver cations, and precipitating at least a part of said silver cations. 10.A methodforhydrogenion-exchangingsilverzeo— lite L comprising bringing said silver zeolite L into in timate contact with an aqueous solution containing (1) hydrogenionsinaconcentrationnotsubstantiallygreater than the hydrogen ion concentration of water, (2) anions which ‘form precipitates With the silver cations of said S1]. References Cited in the ?le of this patent UNITED STATES PATENTS zeolite Y, and precipitating at least part of the silver insaidsilverzeoliteY assilverhalide. 14.A method for hydrogen ion-exchanging silver zeolite L comprising bringing into intimate contact with tration not substantially greater than the hydro-gen ion concentration of water, exchanging hydrogen ions in said solution for at least part of the silver in said silver zeolite T, ‘and precipitating ‘at least part of the silver in said silver 2,326,323 2,413,134 2,678,885 Benedict _______________ Aug. 10, 1943 Barrer ________________ Dec. 24, 1946 Porter ________________ May 18, 1954 OTHER REFERENCES Hendricks: “Ind. and Eng., Chem.,” 37 625-630 (1945).PDF Image | HYDROGEN ION EXCHANGE OF ZEOLITES
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