Jmz-5 and jmz-6, zeolites having an szr-type crystal structure, and methods of their preparation and use

Abstract

JMZ-5, an aluminosilicate having an SZR framework type and a sea-urchin type morphology is described. A calcined product, JMZ-5C, formed from JMZ-5 is also described. JMZ-6, an aluminosilicate having an SZR framework type and a needle, aggregate morphology is described. A calcined product, JMZ-6C, formed from JMZ-6 is also described. Methods of preparing these zeolites and their metal-containing calcined counterparts are described along with methods of using these zeolites and their metal containing calcined counterparts in treating exhaust gases.

What is claimed is: 
     
         1 . An aluminosilicate molecular sieve comprising an SZR type framework and having needle-aggregate type morphology (JMZ-6). 
     
     
         2 . The aluminosilicate molecular sieve of  claim 1 , having an X-ray powder diffraction pattern substantially similar to that of an SZR type framework. 
     
     
         3 . The aluminosilicate molecular sieve of  claim 1 , where the molecular sieve has a silica to alumina ratio (SAR) of 10 to 30. 
     
     
         4 . The aluminosilicate molecular sieve of  claim 1 , where the aluminosilicate molecular sieve further comprises a structure-directing agent, preferably comprising tetraethylammonium cations, N′, N′, N′, N′, N′, N′-hexaethylpentanediammonium cations or quinuclidine. 
     
     
         5 . A calcined aluminosilicate molecular sieve comprising a SZR type framework and having a needle aggregate type morphology (JMZ-6). 
     
     
         6 . The calcined aluminosilicate molecular sieve of  claim 5 , wherein the calcined aluminosilicate molecular sieve further comprises an extra-framework metal, wherein the extra-framework metal is an alkali metal, an alkaline earth metal, a transition metal or a mixture thereof. 
     
     
         7 . The calcined aluminosilicate molecular sieve of  claim 6 , where the extra-framework metal comprises calcium, cerium, cobalt, copper, chromium, iron, lithium, manganese, nickel, potassium, sodium, strontium or a combination of two or more of these metals. 
     
     
         8 . A catalyst composition comprising a calcined aluminosilicate molecular sieve of  claim 5 . 
     
     
         9 . The catalyst composition of  claim 8 , wherein the catalyst further comprises an extra-framework metal wherein the extra-framework metal comprises an alkali metal, an alkaline earth metal, a transition metal or a mixture thereof. 
     
     
         10 . The catalyst composition of  claim 9 , wherein the extra-framework metal is calcium, cerium, cobalt, copper, chromium, iron, lithium, manganese, molybdenum, nickel, niobium, potassium, sodium, strontium, tantalum, tungsten, or vanadium or a combination of two or more of these metals. 
     
     
         11 . The catalyst composition of  claim 9 , wherein the extra-framework metal comprises about 0.1 to about 10, preferably about 0.1 to about 5, weight percent of total weight of the molecular sieves, extra-framework metal and catalytically active metal in the catalyst a transition metal or noble metal. 
     
     
         12 . The catalyst composition of  claim 10 , wherein the molecular sieve comprises about 0.1 to about 10, preferably about 0.1 to about 5, weight percent of copper, iron, manganese or a combination of two or more of these metals. 
     
     
         13 . A catalyst article for treating exhaust gas, the catalyst article comprising a calcined aluminosilicate molecular sieve of 5, where the calcined aluminosilicate molecular sieve is disposed on and/or within a substrate, preferably a honeycomb substrate.