Cracking catalyst composition, a process for cracking a hydrocarbon feedstock, passivating agent and a process for passivating contaminating metals

Claim 2

A treating agent suitable for passivating contaminating metals on a cracking catalyst characterized by (A) at least one of elemental antimony and compounds of antimony and (B) at least one of elemental tin and compounds of tin.

Claim 3

A treating agent in accordance with claim 1) characterized in that the weight ratio of antimony to tin is in the range of 0.001:1 to 1000:1.

Claim 4

A treating agent in accordance with claim 2) characterized in that said weight ratio is less than 100:1.

Claim 5

A treating agent according to claim 3) characterized in that the weight ratio is less than 50:1.

Claim 6

A treating agent according to claim 4) characterized in that said weight ratio is less than 20:1.

Claim 7

A treating agent according to claim 5) characterized in that the weight ratio is less than 15:1.

Claim 8

A treating agent in accordance with claim 1) or 3) characterized in that said weight ratio is at least 0.01:1.

Claim 9

A treating agent in accordance with claim 1) or 4) characterized in that said weight ratio is at least 0.05:1.

Claim 10

A treating agent according to claim 1) or 5) characterized in that said weight ratio is at least 2:1.

Claim 11

A treating agent according to one of the preceding claims characterized in that said weight ratio is at least 5:1.

Claim 12

A treating agent in accordance with one of the preceding claims characterized in that said compoun, of antimony is at least one of the group consisting of antimony oxides, antimony sulfides, antimony selenides, antimony tellurides, antimony sulfates, antimonic acids, antimony halides, antimonyl halides, antimonides, antimony carboxylates, antimony thiocarboxylates, antimony thiocarbonates, antimony carbonates, trihydrocarbylantimony compounds, trihydrocarbylantimony oxides, antimony salts of phenolic compounds, antimony sulfonates, antimony carbamates, antimony thiocarbamates, antimony phosphites, antimony phosphates and antimony thiophosphates, and in that said compound of tin is at least one of the group consisting of tin oxides, tin sulfides, tin selenides, tin tellurides, tin sulfates, stannic acids, tin halides, tin oxyhalides, tin carboxylates, tin thiocarboxylates, + tin thiocarbonates, tin carbonates, tetrahydrocarbyltin compounds, dihydrocarbyltin oxides, dihydrocarbyltin bis(hydrocarbyl mercaptide)s, tin salts of phenolic compounds, tin salts of thiophenolic compounds, tin sulfonates, tin carbamates, tin thiocarbamates, tin phosphites, tin phosphates, tin thiophosphates and dihydrocarbyltin bis(0,0-dihydrocarbyl thiophosphate)s

Claim 13

A treating agent according to claim 11) characterized in that said compound of antimony comprises an antimony thiophosphate.

Claim 14

A treating agent according to claim 12) characterized in that said compound of antimony comprises antimony tris(0,0-dipropyl phosphorodithioate).

Claim 15

. 14. A treating agent according to claims 12) or 13) characterized in that said compound of tin comprises dihydrocarbyltin oxide. + dihydrocarbyl tin bis(hydrocarbyl mercaptoalkanoates,

Claim 16

A treating agent according to claim 14) characterized in that said compound of tin comprises dibutyltin oxide.

Claim 17

A treating agent according to claim 12) or 13) charao- terized in that said compound of tin comprises dihydrocarbyltin bis(hydrocarbyl mercaptoacetate).

Claim 18

A treating agent according to claim 16) characterized in that said compound of tin comprises dibutyltin bis(isoaetyl mercaptoacetate).

Claim 19

A treating agent according to claim 12) or 13) characterized in that said compound of tin comprises a tin thiophosphate.

Claim 20

A treating agent according to claim 18) characterized in that said compound of tin comprises stannic 0,0-dipropyl phosphoro dithioate.

Claim 21

A modified cracking catalyst composition comprising a cracking catalyst having in combination therewith a modifying amount of a treating agent characterized in that said treating agent is as defined in one of the claims 1) to 19).

Claim 22

A composition in accordance with claim 20) charecterised in that said cracking catalyst is a used cracking catalyst having a deactivating amount of one or more of the metals nickel, iron and vanadium deposited thereon.

Claim 23

A composition in accordance with claim 20) characterized in that said cracking catalyst is an unused cracking catalyst.

Claim 24

A composition in accordance with claim 20) characterized in that said cracking catalyst is a mixture of used and unused cracking catalyst.

Claim 25

A composition in accordance with claim 20) characterized in that each of (A) and (B) of said treating agent is present in an amount in the range of from 0.005 to 8 weight per cent, said percentage being based on the weight of said cracking catalyst prior to addition of (A) and (B).

Claim 26

A composition in accordance with one of claims 20) to 23) characterized in that the quantity of each of (A) and (B) of the treating agent is such as to provide at least about 0.0001 weight per cent antimony and at least. about 0.0001 weight per cent tin, the weight percentages being based on the weight of said cracking catalyst prior to the addition of the treating agent.

Claim 27

A composition in accordance with claim 25) characterized in that the amount of antimony is in the range of 0.005 to 2 weight per cent, and the amount of tin is in the range 0.0005 to 2 weight per cent.

Claim 28

A composition in accordance with claim 25) characterized in that the amount of antimony is in the range of 0.01 to 1 weight per cent, and the amount of tin is in the range of about 0.001 to about 1 weight per cent.

Claim 29

A composition in accordance with claim 25) characterized in that the amount of antimony is in the range of 0.05 to 0.8 weight per cent, and the amount of tin is in the range of 0.001 to 0.8 weight per cent.

Claim 30

A composition in accordance with one of the preceding claims 20), 23) to 28) having deposited thereon a detrimental amount of at least one contaminating metal selected from the group consisting of nickel, iron, copper, cobalt and vanadium, characterized by the fact that the weight ratio of antimony in (A) to tin in (B) is such as to provide a passivation of said at least one contaminating metal on said cracking catalyst greater than the sum of the passivating effects of (A) and (B) individually.

Claim 31

A process for cracking a hydrocarbon feedstock which comprises contacting said hydrocarbon feedstock with a cracking catalyst under cracking conditions wherein said cracking catalyst has been modified with a modifying amount of a treating agent characterized in that said treating agent is as defined in one of claims 1) to 19).

Claim 32

A process in accordance with claim 30) characterized in that said cracking catalyst is as defined in one of claims 20) to 29).

Claim 33

A process in accordance with claim 30) or 31) characterized in that (A) and (B) are added to said hydrocarbon feedstock.

Claim 34

A process in accordance with one of claims 30) to 32) characterized in that the total effective metals content of nickel, iron and vanadium in said hydrocarbon feedstock is in the range of 40 to 800 ppm.

Claim 35

A process in accordance with one of preceding claims' 30) to 33) characterized in that said hydrocarbon feedstock contains a detrimental amount of contaminating metals selected from the group consisting of nickel, iron and vanadium, and in that the modifying amount of the treating agent comprises at least about 0.0001 weight per cent antimony and at least about 0.000 1 weight per cent tin, the weight percentages being based on the weight of said cracking catalyst prior to being contacted with (A) and (B).

Claim 36

A process in accordance with one of claims 30) to 34) for cracking a hydrocarbon feedstock containing a detrimental amount of contaminating metals selected from the group consisting of nickel, iron and vanadium, wherein the feedstock is contacted with an unmodified cracking catalyst under cracking conditions, characterized in contacting said unmodified cracking catalyst with said treating agent using an amount of at least one of antimony and compounds of antimony sufficient to provide at least one of the improvements of an increase in catalyst activity, an increase in yield of liquid fuels, a reduction in the production of coke, and a reduction in the production of hydrogen compared to the unmodified catalyst and using an amount of at least one of tin and compounds of tin sufficient to provide an enhancement in said at least one improvement which is greater than the same amount of said at least one of tin and compounds of tin would provide over said unmodified cracking catalyst in the absence of antimony and compounds of antimony.

Claim 37

A process in accordance with one of claims 30) to 35) characterized in that the unmodified cracking catalyst . is contacted with the treating agent and the thus modified catalyst composition is then contacted by said feedstock.

Claim 38

A cracking process in accordance with one of claims 30) to 36) further characterized by (a) introducing said hydrocarbon feedstock stream into a cracking zone, (b) contacting the hydrocarbon feedstock stream in said cracking zone with a oracking catalyst under elevated temperature conditions to produce a cracked product, (c) withdrawing said cracked product from said cracking zone, (d) separating said cracked product from said catalyst, (e) introducing said catalyst into a regeneration zone, (f) contacting said cracking catalyst in said regeneration zone with free oxygen-containing gas such as to burn off at least a portion of the coke deposited on said cracking catalyst and (g) reintroducing the thus regenerated catalyst into the cracking zone.

Claim 39

A process in accordance with claim 37)characterized in that said cracking catalyst is contacted with said (A) and (B) of said treating agent under elevated temperature conditions and under reducing conditions.

Claim 40

A process in accordance with claim 37) characterized in that said treating agent is added to said feedstock by the separate addition of each of (A) and (B) to said feedstock.

Claim 41

A process in accordance with claim 37) wherein said treating agent is admixed with said regenerated catalyst prior to introduction thereof into said cracking zone.

Claim 42

A process in accordance with claim 37) wherein said treating agent is deposited on unused cracking catalyst and the resulting composition is introduced into said regeneration zone.

Claim 43

A process for passivating at least one contaminating metal from the group consisting of nickel, iron, copper, cobalt and vanadium, particularly of nickel, iron and vanadium, on a cracking catalyst by contacting said cracking catalyst with a passivating agent, characterized by using as said passivating agent a treating agent as defined in one of claims 1) to 19).

Claim 44

A process in accordance with claim 42) characterized in that the relationship between the treating agent and the cracking oatalyst is as defined in one of claima 20) to 29).