US4389305A — Catalytic hydrodenitrogenation of organic compoun…

Claim 1

Independent Claim 135 words

A process for the catalytic hydrodenitrogenation of an organic nitrogen compound comprising the step of contacting said organic nitrogen compound under suitable hydrodenitrogenation conditions with a catalyst composition comprising zinc, titanium, and at least one promoter selected from the group consisting of vanadium, chromium, cobalt, nickel, molybdenum, tungsten, rhenium, platinum, palladium, rhodium, ruthenium, and compounds thereof, wherein the concentration by weight of said promoter in said catalyst composition is less than the total concentration by weight of said zinc and said titanium in said catalyst composition and wherein said zinc and titanium are present in said catalyst composition in the form of zinc titanate prepared by calcining a mixture of zinc oxide and titanium dioxide in the presence of molecular oxygen at a temperature in the range of about 650° C. to about 1050° C.

Claim 2

Dependent Claim 135 words

A process for the catalytic hydrodenitrogenation of an organic nitrogen compound comprising the step of contacting said organic nitrogen compound under suitable hydrodenitrogenation conditions with a catalyst composition comprising zinc, titanium, and at least one promoter selected from the group consisting of vanadium, chromium, cobalt, nickel, molybdenum, tungsten, rhenium, platinum, palladium, rhodium, ruthenium, and compounds thereof, wherein the concentration by weight of said promoter in said catalyst composition is less than the total concentration by weight of said zinc and said titanium in said catalyst composition and wherein said zinc and titanium are present in said catalyst composition in the form of zinc titanate prepared by calcining a mixture of zinc oxide and titanium dioxide in the presence of molecular oxygen at a temperature in the range of about 650° C. to about 1050° C.

Claim 3

Dependent Claim 35 words

A process in accordance with claim 1 wherein said organic nitrogen compound is selected from the group comprising amines, diamines, pyridines, quinolines, porphyrins, benzoquinolines and the like and mixtures of any two or more thereof.

Claim 4

Dependent Claim 29 words

A process in accordance with claim 1 wherein the atomic ratio of zinc to titanium in said catalyst composition is in the range of about 1:1 to about 3:1.

Claim 5

Dependent Claim 29 words

A process in accordance with claim 1 wherein the atomic ratio of zinc to titanium in said catalyst composition is in the range of about 1.8:1 to about 2.2:1.

Claim 6

Dependent Claim 47 words

A process in accordance with claim 1 wherein said catalyst composition has been calcined in the presence of molecular oxygen at a temperature in the range of about 500° C. to about 650° C. after said at least one promoter has been added to said zinc titanate.

Claim 7

Dependent Claim 86 words

A process in accordance with claim 1 wherein the concentration of vanadium, chromium, cobalt, nickel, molybdenum, or tungsten as individual promoters, expressed as an element, if present, is in the range of about 0.1 to about 16 weight percent based on the weight of said catalyst composition and the concentration of rhenium, palladium, rhodium, ruthenium or platinum as individual promoters, expressed as the element, if present, is in the range of about 0.2 to about 1.6 weight percent based on the weight of said catalyst composition.

Claim 8

Dependent Claim 49 words

A process in accordance with claim 6 wherein the total concentration of any combination of the group which said at least one promoter is selected, expressed as an element, is in the range of about 0.1 to about 24 weight percent based on the weight of the catalyst composition.

Claim 9

Dependent Claim 17 words

A process in accordance with claim 1 wherein said at least one promoter is cobalt and molybdenum.

Claim 10

Dependent Claim 26 words

A process in accordance with claim 8 wherein the cobalt:molybdenum atomic ratio in said catalyst composition is in the range of about 0.6:1 to about 0.8:1.

Claim 11

Dependent Claim 19 words

A process in accordance with claim 1 wherein said organic nitrogen compound is contained in a fluid feed stream.

Claim 12

Dependent Claim 15 words

A process in accordance with claim 10 wherein said fluid feed stream contains aromatic hydrocarbons.

Claim 13

Dependent Claim 96 words

A process in accordance with claim 10 wherein said suitable hydrodenitrogenation conditions comprise a temperature in the range of about 316° C. to about 427° C., a total system pressure in the range of about 400 psig to about 1000 psig, a hydrogen flow rate in the range of about 500 SCF/bbl to about 3,000 SCF/bbl and a residence time for said fluid feed stream in the presence of said catalyst composition in the range of about 1 to about 5 liquid volumes of said fluid feed stream per volume of said catalyst composition per hour.

Claim 14

Dependent Claim 54 words

A process in accordance with claim 10 additionally comprising the steps of: discontinuing the flow of said fluid feed stream over said catalyst composition; and contacting said catalyst composition, after the flow of said fluid feed stream is discontinued, with a molecular oxygen-containing fluid under suitable regeneration conditions to thereby regenerate said catalyst composition.

Claim 15

Dependent Claim 65 words

A process in accordance with claim 13 wherein said suitable regenerationn conditions comprise a feed rate of said molecular oxygen-containing fluid suitable to supply sufficient oxygen to remove substantially all of the carbonaceous deposit on said catalyst composition, a temperature in the range of about 425° C. to about 540° C., and a pressure in the range of about 200 psig to about 3,000 psig.

Claim 16

Dependent Claim 41 words

A process in accordance with claim 13 additionally comprising the step of purging said catalyst composition with an inert fluid after the step of terminating the flow of said fluid feed stream and before the step of regenerating said catalyst composition.

Claim 17

Dependent Claim 91 words

A process in accordance with claim 13 additionally comprising the steps of: terminating the flow of said molecular oxygen-containing fluid over said catalyst composition after said catalyst composition is substantially regenerated; purging said catalyst composition with an inert fluid after the flow of said molecular oxygen-containing fluid is terminated; terminating the flow of said inert fluid over said catalyst composition after said molecular oxygen-containing fluid is substantially purged from said catalyst composition; and recontacting said catalyst composition with said fluid feed stream after the flow of said inert fluid is terminated.

Claim 18

Dependent Claim 28 words

A process in accordance with claim 1 wherein said catalyst composition is completely sulfided prior to the step of contacting said organic nitrogen compound with said catalyst composition.

Claim 19

Dependent Claim 101 words

A process in accordance with claim 1 wherein said catalyst composition is completely sulfided prior to the step of contacting said organic nitrogen compound with said catalyst composition by contacting a substantially unsulfided catalyst composition with hydrogen sulfide at a temperature in the range of about 175° C. to about 225° C. until hydrogen sulfide is detected in the effluent flowing from said catalyst composition and then contacting said catalyst composition with hydrogen sulfide at a temperatue in the range of about 350° C. to about 400° C. until hydrogen sulfide is detected in the effluent flowing from said catalyst composition.

Claim 20

Dependent Claim 104 words

A process for the catalytic hydrodenitrogenation of an organic nitrogen compound which is contained in a fluid stream which does not contain hydrocarbons which are subject to dehydrogenation, reforming or hydrocracking comprising the step of contacting said fluid stream containing said organic nitrogen compound under suitable hydrodenitrogenation conditions with a catalyst composition comprising zinc and titanium wherein said zinc and titanium are present in said catalyst composition in the form of zinc titanate prepared by calcining a mixture of zinc oxide and titanium dioxide in the presence of molecular oxygen at a temperature in the range of about 650° C. to about 1050° C.

Claim 21

Dependent Claim 104 words

A process for the catalytic hydrodenitrogenation of an organic nitrogen compound which is contained in a fluid stream which does not contain hydrocarbons which are subject to dehydrogenation, reforming or hydrocracking comprising the step of contacting said fluid stream containing said organic nitrogen compound under suitable hydrodenitrogenation conditions with a catalyst composition comprising zinc and titanium wherein said zinc and titanium are present in said catalyst composition in the form of zinc titanate prepared by calcining a mixture of zinc oxide and titanium dioxide in the presence of molecular oxygen at a temperature in the range of about 650° C. to about 1050° C.

Claim 22

Dependent Claim 35 words

A process in accordance with claim 19 wherein said organic nitrogen compound is selected from the group comprising amines, diamines, pyridines, quinolines, porphyrins, benzoquinolines and the like and mixtures of any two or more thereof.

Claim 23

Dependent Claim 29 words

A process in accordance with claim 19 wherein the atomic ratio of zinc to titanium in said catalyst composition is in the range of about 1:1 to about 3:1.

Claim 24

Dependent Claim 29 words

A process in accordance with claim 19 wherein the atomic ratio of zinc to titanium in said catalyst composition is in the range of about 1.8:1 to about 2.2:1.

Claim 25

Dependent Claim 94 words

A process in accordance with claim 19 wherein said suitable hydrodenitrogenation conditions comprise a temperature in the range of about 316° C. to about 427° C., a total system pressure in the range of about 400 psig to about 1000 psig, a hydrogen flow rate in the range of about 500 SCF/bbl to about 3,000 SCF/bbl and a residence time for said fluid stream in the presence of said catalyst composition in the range of about 1 to about 5 liquid volumes of said fluid stream per volume of said catalyst composition per hour.

Claim 26

Dependent Claim 28 words

A process in accordance with claim 19 wherein said catalyst composition is completely sulfided prior to the step of contacting said organic nitrogen compound with said catalyst composition.

Claim 27

Dependent Claim 101 words

A process in accordance with claim 19 wherein said catalyst composition is completely sulfided prior to the step of contacting said organic nitrogen compound with said catalyst composition by contacting a substantially unsulfided catalyst composition with hydrogen sulfide at a temperature in the range of about 175° C. to about 225° C. until hydrogen sulfide is detected in the effluent flowing from said catalyst composition and then contacting said catalyst composition with hydrogen sulfide at a temperature in the range of about 350° C. to about 400° C. until hydrogen sulfide is detected in the effluent flowing from said catalyst composition.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1986-06-20	1986-12-20	1987-06-21	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1990-06-20	1990-12-20	1991-06-21	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1994-06-20	1994-12-20	1995-06-21	$7700.00	Window Closed / Lapsed

Catalytic hydrodenitrogenation of organic compounds employing promoted zinc titanate

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