Production of crystalline zeolites

Claim 1

A process for producing crystalline zeolite TPZ-12, which comprises maintaining a starting mixture at a temperature of at least 80° C. for a period sufficient to produce zeolite crystals, said starting mixture consisting of (a) a substance capable of yielding silica under the reaction conditions, (b) a water-soluble alkali metal compound, (c) water, and (d) a diammonium compound represented by the following general formula ##STR9## wherein R 1 and R 2 are identical or different and each represents an alkyl group having 1 to 4 carbon atoms, p and q are identical or different and each represents an integer of 4 or 5, n is 4, 5 or 6, and y represents an anion having a valence of m, and optionally, (e) a substance capable of yielding alumina under the reaction conditions, in the quantities represented by the following expressions 1≦[ SiO.sub.2 ]/[Al.sub.2 O.sub.3 ] 1×10.sup.-4 ≦[A]/([Si]+[Al])≦1 1×10.sup.-4 ≦[OH]/([Si]+[Al])≦0.5 5≦[H.sub.2 O]/([Si]+[Al])≦100 1×10.sup.-5 ≦[OH]/[H.sub.2 O]≦1×10.sup.-1 wherein [SiO 2 ] represents the amount in moles of the substance capable of yielding silica under the reaction conditions calculated as SiO 2 , [Al 2 O 3 ] represents the amount in moles of the substance capable of yielding alumina under the reaction conditions calculated as Al 2 O 3 , [Si] represents the amount in moles of the substance capable of yielding silica under the reaction conditions calculated as Si, [Al] represents the amount in moles of the substance capable of yielding alumina under the reaction conditions calculated as Al, [A] represents the amount in moles of the diammonium compound, [H 2 O] represents the amount in moles of water, and [OH] represents the total amount in moles of the alkali metal compound and the diammonium compound calculated as OH.