NOVEL MICROPOROUS CRYSTALLINE MATERIAL COMPRISING A MOLECULAR SIEVE OR ZEOLITE HAVING AN 8-RING PORE OPENING STRUCTURE AND METHODS OF MAKING AND USING SAME

摘要

THERE IS DISCLOSED A HYDROTHERMALLY STABLE MICROPOROUS CRYSTALLINE MATERIAL COMPRISING A MOLECULAR SIEVE OR ZEOLITE HAVING AN 8-RING PORE OPENING STRUCTURE, SUCH AS SAPO-34 OR ALUMINOSILICATE ZEOLITE, ABLE TO RETAIN A SPECIFIC PERCENTAGE OF ITS SURFACE AREA AND MICROPORE VOLUME AFTER TREATMENT WITH HEAT AND MOISTURE, SUCH AS AT LEAST 80% OF ITS SURFACE AREA AND MICROPORE VOLUME AFTER EXPOSURE TO TEMPERATURES OF UP TO 9000C IN THE PRESENCE OF UP TO 10 VOLUME PERCENT WATER VAPOR FOR A TIME RANGING FROM 1 TO 16 HOURS. METHODS OF USING THE DISCLOSED CRYSTALLINE MATERIAL, SUCH AS IN THE SCR OF NO X IN EXHAUST GAS ARE ALSO DISCLOSED, AS ARE METHODS OF MAKING SUCH MATERIALS