Hydrocarbon cracking catalyst

Claim 2

A process for passivating at least one metal selected from the group consisting of nickel, vanadium and iron, on a zeolite-containing cracking catalyst comprising contacting the cracking catalyst with at least one treating agent selected from germanium and germanium compounds to impart to the cracking catalyst a germanium concentration of from about 0.01 to about 0.5 weight percent.

Claim 3

A process as in claim 1 wherein said cracking catalyst is impregnated with said treating agent.

Claim 4

A process as in claim 1 wherein said cracking catalyst is mixed with said treating agent.

Claim 5

A process as in claim 1 wherein said cracking catalyst is sprayed with said treating agent.

Claim 6

A process as in claim 1 wherein said cracking catalyst is unused.

Claim 7

A process as in claim 4 wherein said cracking catalyst has been used and is contaminated with at least one metal selected from the group consisting of nickel, vanadium and iron.

Claim 8

A process as in claim 1 wherein the cracking catalyst is contacted with at least one germanium compound selected from the group consisting of germanium oxide, germanium sulfide, germanium nitride, germanium halide, germanium selenide, germanium telluride and germanium hydride.

Claim 9

A process as in claim 1 wherein the cracking catalyst is contacted with at least one germanium compound represented by the formula ##STR4## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen, halogen, hydrocarbyl and oxyhydrocarbyl.

Claim 10

A process as in claim 8 wherein said treating agent comprises tetraphenylgermanium.

Claim 11

A process as in claim 1 wherein the cracking catalyst is contacted with at least one treating agent represented by the formula ##STR5## wherein R is hydrocarbyl having from 1 to about 20 carbon atoms.

Claim 12

A process as in claim 10 wherein R is n-propyl.

Claim 13

A process for passivating at least one metal selected from the group consisting of nickel, vanadium and iron, on a cracking catalyst comprising contacting the cracking catalyst with at least one treating agent selected from the group consisting of a compound represented by the formula ##STR6## wherein R 1 , R 2 , R 3 and R 4 each comprise from 1 to about 20 carbon atoms and are selected from the group consisting of hydrocarbyl and oxyhydrocarbyl, and a germanium di(hydrocarbyl)-phosphorodithioate represented by the formula ##STR7## wherein each R is hydrocarbyl having from 1 to about 20 carbon atoms, to impart to said cracking catalyst a passivating amount of germanium.

Claim 14

A process for passivating at least one metal selected from the group consisting of nickel, vanadium and iron, on a cracking catalyst comprising contacting the cracking catalyst with at least one treating agent selected from the group consisting of a compound represented by the formula ##STR6## wherein R 1 , R 2 , R 3 and R 4 each comprise from 1 to about 20 carbon atoms and are selected from the group consisting of hydrocarbyl and oxyhydrocarbyl, and a germanium di(hydrocarbyl)-phosphorodithioate represented by the formula ##STR7## wherein each R is hydrocarbyl having from 1 to about 20 carbon atoms, to impart to said cracking catalyst a passivating amount of germanium.

Claim 15

A process as in claim 12 wherein said cracking catalyst is contacted with said at least one treating agent so as to impart to the contacted cracking catalyst a germanium concentration of from about 0.0001 to about 4 percent by weight.

Claim 16

A process as in claim 12 wherein said cracking catalyst is contacted with said at least one treating agent so as to impart to the contacted cracking catalyst a germanium concentration of from about 0.001 to about 2 percent by weight.

Claim 17

A process as in claim 13 wherein said cracking catalyst is impregnated with said treating agent.

Claim 18

A process as in claim 13 wherein said cracking agent is mixed with said treating agent.

Claim 19

A process as in claim 13 wherein said cracking catalyst is sprayed with said treating agent.

Claim 20

A process as in claim 13 wherein said cracking catalyst has been used and is contaminated with at least one metal selected from the group consisting of nickel, vanadium and iron.

Claim 21

A process as in claim 18 wherein the ratio of the elemental weight of germanium to the vanadium equivalents on the cracking catalyst is from about 1:500 to about 1:5.

Claim 22

A process as in claim 19 wherein said treating agent comprises tetraphenylgermanium.

Claim 23

A process as in claim 19 wherein said treating agent comprises germanium tetrakis(O,O-di-n-propylphosphorodithioate).

Claim 24

A process for increasing the activity of a used zeolite-containing cracking catalyst contaminated by at least 3000 ppm vanadium equivalents comprising contacting said cracking catalyst with at least one treating agent selected from the group consisting of germanium and a germanium compound so as to deposit on said cracking catalyst a sufficient amount of treating agent to impart to said cracking catalyst a germanium concentration of between about 0.0001 and about 4 percent by weight of contacted cracking catalyst.

Claim 25

A process for increasing the activity of a used zeolite-containing cracking catalyst contaminated by at least 3000 ppm vanadium equivalents comprising contacting said cracking catalyst with at least one treating agent selected from the group consisting of germanium and a germanium compound so as to deposit on said cracking catalyst a sufficient amount of treating agent to impart to said cracking catalyst a germanium concentration of between about 0.0001 and about 4 percent by weight of contacted cracking catalyst.

Claim 26

A process as in claim 22 wherein the cracking catalyst is contacted with at least one treating agent selected from the group consisting of germanium oxide, germanium sulfide, germanium nitride, germanium halide, germanium selenide, germanium telluride and germanium hydride.

Claim 27

A process as in claim 21 wherein the cracking catalyst is contacted with at least one treating agent represented by the formula ##STR8## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen, halogen, hydrocarbyl and oxyhydrocarbyl.

Claim 28

A process as in claim 24 wherein said treating agent comprises tetraphenylgermanium.

Claim 29

A process as in claim 22 wherein the cracking catalyst is contacted with at least one treating agent selected from the group consisting of a germanium salt of a hydrocarbylphosphoric acid and a germanium salt of a hydrocarbylphosphoric acid.

Claim 30

A process as in claim 26 wherein the treating agent comprises a germanium di(hydrocarbyl)phosphorodiothioate.

Claim 31

A process as in claim 27 wherein the treating agent comprises germanium tetrakis(O,O-di-n-propylphosphorodithioate).

Claim 32

A process as in claim 22 further comprising contacting the cracking catalyst with at least one compound selected from the group consisting of antimony, tin and bismuth compounds to impart to said cracking catalyst a concentration of at least one antimony, tin and bismuth of from about 0.001 to about 2 percent by weight of the thus further contacted cracking catalyst.

Claim 33

A process as in claim 29 wherein said at least one compound comprises an antimony di(hydrocarbyl)phosphorodithioate.

Claim 34

A process as in claim 28 further comprising contacting the cracking catalyst with antimony tris(di-n-propylphosphorodithioate).

Claim 35

A process as in claim 21 wherein the weight ratio of germanium to vanadium equivalents is in the range of from about 1:1000 to about 1:1.

Claim 36

A process as in claim 31 wherein the weight ratio of germanium to vanadium equivalents is in the range of from about 1:500 to about 1:5.

Claim 37

A process as in claim 32 wherein the concentration of germanium in said cracking catalyst is from about 0.01 to about 2 percent by weight of the contacted cracking catalyst.