Catalysis over activated zeolites

Claim 2

A process for converting a feedstock comprising hydrocarbon compounds to conversion products comprising hydrocarbon compounds of lower molecular weight than feedstock hydrocarbon compounds which comprises contacting said feedstock at conversion conditions with a catalyst comprising a zeolite composition prepared by a method which comprises impregnating a zeolite having an initial silica-to-alumina mole ratio of 70 or more with an ammoniacal aluminum fluoride solution at a temperature of from about 0° C. to about 100° C., said solution comprising from about 0.1 to about 5 weight percent of an aluminum fluoride in solution with at least one member selected from the group consisting of ammonium hydroxide and ammonia, contacting the impregnated zeolite with a warm aqueous 0.1 to 2 Normal solution of an ammonium salt, and calcining the ammonium salt solution contacted material at a temperature of from about 200° C. to about 600° C.

Claim 3

The process of claim 1 wherein said zeolite has a silica-to-alumina mole ratio greater than about 100.

Claim 4

The process of claim 1 wherein said zeolite has a silica-to-alumina mole ratio greater than about 500.

Claim 5

The process of claim 1 wherein said aluminum fluoride is at least one member seleted from the group consisting of AlF 3 , (NH 4 ) 3 AlF 6 , (NH 4 ) 2 AlF 5 and NH 4 AlF 4 .

Claim 6

The process of claim 1 wherein said ammonium salt solution is ammonium nitrate, ammonium sulfate or ammonium chloride.

Claim 7

The process of claim 1 wherein said zeolite has the structure of ZSM-5, ZSM-11, ZSM-5/ZSM-11 intermediate, ZSM-12, ZSM-23, ZSM-35, ZSM-38 or ZSM-48.

Claim 8

The process of claim 6 wherein said zeolite has the structure of ZSM-5 or ZSM-11.

Claim 9

The process of claim 1 wherein said conversion conditions include a temperature of from about 300° C. to about 800° C., a pressure of from about 0.1 atmosphere to about 35 atmospheres and a weight hourly space velocity of from about 0.1 hr -1 to about 20 hr -1 .

Claim 10

A process for converting a feedstock comprising hydrocarbon compounds to conversion products comprising hydrocarbon compounds of lower molecular weight than feedstock hydrocarbon compounds which comprises contacting said feedstock at conversion conditions with a catalyst comprising a zeolite composition prepared by a method which comprises impregnating a zeolite having an initial silica-to-alumina mole ratio of 70 or more and the structure of ZSM-5 with an ammoniacal aluminum fluoride solution at a temperature of from about 0° C. to about 100° C., said solution comprising from about 0.1 to about 5 weight percent of an aluminum fluoride in solution with at least one member selected from the group consisting of ammonium hydroxide and ammonia, contacting the impregnated zeolite with a warm aqueous 0.1 to 2 Normal solution of an ammonium salt, and calcining the ammonium salt solution contacted material at a temperature of from about 200° C. to about 600° C.

Claim 11

A process for converting a feedstock comprising hydrocarbon compounds to conversion products comprising hydrocarbon compounds of lower molecular weight than feedstock hydrocarbon compounds which comprises contacting said feedstock at conversion conditions with a catalyst comprising a zeolite composition prepared by a method which comprises impregnating a zeolite having an initial silica-to-alumina mole ratio of 70 or more and the structure of ZSM-5 with an ammoniacal aluminum fluoride solution at a temperature of from about 0° C. to about 100° C., said solution comprising from about 0.1 to about 5 weight percent of an aluminum fluoride in solution with at least one member selected from the group consisting of ammonium hydroxide and ammonia, contacting the impregnated zeolite with a warm aqueous 0.1 to 2 Normal solution of an ammonium salt, and calcining the ammonium salt solution contacted material at a temperature of from about 200° C. to about 600° C.

Claim 12

The process of claim 9 wherein said zeolite has a silica-to-alumina mole ratio greater than about 100.

Claim 13

The process of claim 9 wherein said zeolite has a silica-to-alumina mole ratio greater than about 500.

Claim 14

The process of claim 9 wherein said aluminum fluoride is at least one member selected from the group consisting of AlF 3 , (NH 4 ) 3 AlF 6 , (NH 4 ) 2 AlF 5 and NH 4 AlF 4 .

Claim 15

The process of claim 9 wherein said ammonium salt solution is ammonium nitrate, ammonium sulfate or ammonium chloride.

Claim 16

The process of claim 9 wherein said conversion conditions include a temperature of from about 300° C. to about 800° C., a pressure of from about 0.1 atmosphere to about 35 atmospheres and a weight hourly space velocity of from about 0.1 hr -1 to about 20 hr -1 .