High silica zeolites: UZM-5HS

A process for preparing a modified microporous crystalline zeolite having a three-dimensional framework of at least AlO2 and SiO2 tetrahedral units and an empirical composition on an anhydrous basis in terms of mole ratios of the elements of:

• M1an+Al(1−x)ExSiy′Oz
• where M1 is at least one exchangeable cation selected from the group consisting of alkali metals, alkaline earth metals, rare earth metals, ammonium ion, hydrogen ion and mixtures thereof, a is the mole ratio of M1 to (Al+E) and varies from about 0 to about 50, E is an element selected from the group consisting of gallium, iron, boron, chromium, indium and mixtures thereof, x is the mole fraction of E and varies from 0 to about 0.5, n is the weighted average valence of M and has a value of about +1 to about +3, y′ is the mole ratio of Si to (Al+E) and is greater than about 5 and z″ is the mole ratio of O to (Al+E) and has a value determined by the equation:
• z″=(a·n+3+4·y′)/2
• the zeolite characterized in that it has at least two x-ray diffraction peaks, one at a d-spacing of 3.84±0.07 Å and one at a d-spacing of 8.55±0.25 Å, the process comprising treating a starting zeolite at treating conditions thereby removing at least a portion of the framework aluminum and optionally inserting silicon into the framework to provide the modified zeolite;
• the starting zeolite having an empirical formula on an anhydrous basis of:
• M′m′n+Rr′p+Al(1−x)ExSiy′Oz′
• where M′ is an exchangeable cation selected from the group consisting of ammonium ion, hydrogen ion, alkali metals, alkaline earth metals, rare earth metals and mixtures thereof, n is the weighted average valence of M′ and varies from +1 to about +3, m′ is the mole ratio of M′ to (Al+E) and varies from 0 to about 3.0, R is an organic cation selected from the group consisting of protonated amines, protonated diamines, protonated alkanolamines, quaternary ammonium ions, diquarternary ammonium ions, quaternized alkanolammonium ions and mixtures thereof, p is the average weighted valence of the organic cation and varies from about +1 to about +2, r′ is the mole ratio of R to (Al+E) and varies from about 0 to about 3.0, y′ is the ratio of Si to (Al+E) and varies from about 5 to 12 and z′ is the mole ratio of O to (Al+E) and has a value given by the equation:
• z′=(m′·n+r′·p+3+4·y′)/2.

A hydrocarbon conversion process comprising contacting a hydrocarbon with a catalytic composite at hydrocarbon conversion conditions to give a converted product, the catalytic composite comprising a microporous crystalline zeolite having a three-dimensional framework of at least AlO2 and SiO2 tetrahedral units and an empirical composition on an anhydrous basis in terms of mole ratios of the elements of:

• M1an+Al(1−x)ExSiy′Oz″
• where M1 is at least one exchangeable cation selected from the group consisting of alkali metals, alkaline earth metals, rare earth metals, ammonium ion, hydrogen ion and mixtures thereof, a is the mole ratio of M1 to (Al+E) and varies from 0 to about 50, E is an element selected from the group consisting of gallium, iron, boron, chromium, indium and mixtures thereof, x is the mole fraction of E and varies from 0 to about 0.5, n is the weighted average valence of M1 and has a value of about +1 to about +3, y′ is the mole ratio of Si to (Al+E) and is greater than about 5 and z″ is the mole ratio of O to (Al+E) and has a value determined by the equation:
• z″=(a·n+3+4·y′)/2
• the zeolite characterized in that it has at least two x-ray diffraction peaks, one at a d-spacing of 3.84±0.07 Å and one at a d-spacing of 8.55±0.25 Å.