Abstract: A method for purifying zeolitic materials comprising a plurality of solid crystalline phases is disclosed which utilizes the variation in solubility between the phase components comprising the materials. Impure zeolite is contacted with a caustic solution under conditions which dissolve at least one of the phases and the resulting zeolitic material is filtered and washed to produce a purified product.

Abstract: A method is provided for effectively tailoring the catalytic activity of porous crystalline zeolites. The method involves loading all channels of a cationic form of the porous zeolite with molten wax, contacting the wax-loaded zeolite with hydrogen fluoride solution in a controlled manner, and calcining the hydrogen fluoride solution contacted zeolite.

Abstract: A method is provided for effectively tailoring the catalytic activity of synthetic crystalline zeolites. The method involves synthesizing the zeolite from a reaction mixture containing a source of bulky organic cations, contacting the synthesized zeolite with hydrogen fluoride solution, calcining the hydrogen fluoride solution contacted zeolite, contacting the calcined zeolite with an ammonium exchange solution, and then calcining the ammonium exchange solution contacted zeolite.

Abstract: A new crystalline aluminosilicate zeolite product is provided having a structure intermediate that of ZSM-5 and ZSM-11, having a characterizing X-ray diffraction pattern and having a unit cell parameter of at least about 40 Angstroms. There is also provided a method for synthesizing the new zeolite and a process for using the same as a catalyst in effecting conversion of organic compounds.

Abstract: A new crystalline aluminosilicate zeolite product is provided having a structure intermediate that of ZSM-5 and ZSM-11, having a characterizing X-ray diffraction pattern and having a unit cell parameter of at least about 40 Angstroms. There is also provided a method for synthesizing the new zeolite and a process for using the same as a catalyst in effecting conversion of organic compounds.

Abstract: A method is provided for improving the adsorptive properties, catalytic capabilities and thermal stability of organic cation-containing crystalline zeolites which comprises the sequential steps of (1) heating said zeolite, under controlled temperature conditions, to decompose organic material contained in the zeolite without effecting coking thereof, (2) heating said zeolite, under controlled temperature conditions, in an aqueous monovalent metal salt solution, and then (3) calcining the so treated zeolite. Steps (1) and (2) may be repeated, if desired, in sequence, prior to the calcining step (3).