US4831206A — Chemical processing with an operational step sens…

Claim 1

Independent Claim 350 words

In a process for the conversion of a hydrocarbon stream containing at least sulfur and/or nitrogen components in a reaction zone suitable for said conversion to produce a hydrocarbon product, said conversion being deleteriousIy affected by the presence of said sulfur and/or nitrogen components involving the steps of: (i) catalytically reacting said hydrocarbon stream at a temperature and with sufficient molecular hydrogen to cataltically convert substantially all of the contained sulfur components to hydrogen sulfide and substantially all of the nitrogen components to ammonia, said temperature being such that the hydrocarbon stream is essentially in the vapor phase; (ii) condensing the hydrocarbon stream to essentially the liquid phase; (iii) introducing the liquid hydrocarbon stream to a hydrogen sulfide and ammonia removal means to provide a liquid hydrocarbon stream having a reduced content of hydrogen sulfide and/or ammonia; (iv) vaporizing the liquid hydrocarbon stream having a reduced hydrogen sulfide and/or ammonia content to the vapor phase; and then (v) passing the hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content while in the vapor phase to the reaction zone to produce the hydrocarbon product, the improvement which comprises: (a) removing hydrogen sulfide and/or ammonia from the hydrocarbon stream by contacting the hydrogen sulfide and/or ammonia containing hydrocarbon stream, while in the vapor phase, with a zeolite adsorbent selective for the adsorption of hydrogen sulfide and ammonia as compared to the hydrocarbon having a pore diameter less than or equal to 5 Angstroms at adsorption conditions sufficient to maintain the hydrocarbon stream in the vapor phase and capable of achieving the reduction in hydrogen sulfide and/or ammonia to provide a hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content, said adsorbent being on an adsorption mode for a period of no more than from about 0.5 to 6.0 hours; and then (b) passing the hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content while still in the vapor phase, to the reaction zone at conditions suitable for the conversion to produce the hydrocarbon product including temperatures and pressures sufficient to maintain the hydrocarbon stream and hydrocarbon product essentially in the vapor phase.

Claim 2

Dependent Claim 350 words

In a process for the conversion of a hydrocarbon stream containing at least sulfur and/or nitrogen components in a reaction zone suitable for said conversion to produce a hydrocarbon product, said conversion being deleteriousIy affected by the presence of said sulfur and/or nitrogen components involving the steps of: (i) catalytically reacting said hydrocarbon stream at a temperature and with sufficient molecular hydrogen to cataltically convert substantially all of the contained sulfur components to hydrogen sulfide and substantially all of the nitrogen components to ammonia, said temperature being such that the hydrocarbon stream is essentially in the vapor phase; (ii) condensing the hydrocarbon stream to essentially the liquid phase; (iii) introducing the liquid hydrocarbon stream to a hydrogen sulfide and ammonia removal means to provide a liquid hydrocarbon stream having a reduced content of hydrogen sulfide and/or ammonia; (iv) vaporizing the liquid hydrocarbon stream having a reduced hydrogen sulfide and/or ammonia content to the vapor phase; and then (v) passing the hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content while in the vapor phase to the reaction zone to produce the hydrocarbon product, the improvement which comprises: (a) removing hydrogen sulfide and/or ammonia from the hydrocarbon stream by contacting the hydrogen sulfide and/or ammonia containing hydrocarbon stream, while in the vapor phase, with a zeolite adsorbent selective for the adsorption of hydrogen sulfide and ammonia as compared to the hydrocarbon having a pore diameter less than or equal to 5 Angstroms at adsorption conditions sufficient to maintain the hydrocarbon stream in the vapor phase and capable of achieving the reduction in hydrogen sulfide and/or ammonia to provide a hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content, said adsorbent being on an adsorption mode for a period of no more than from about 0.5 to 6.0 hours; and then (b) passing the hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content while still in the vapor phase, to the reaction zone at conditions suitable for the conversion to produce the hydrocarbon product including temperatures and pressures sufficient to maintain the hydrocarbon stream and hydrocarbon product essentially in the vapor phase.

Claim 3

Dependent Claim 21 words

The method of claim 1, wherein the adsorbent is regenerated when it becomes substantially laden with the hydrogen sulfide and/or ammonia.

Claim 4

Dependent Claim 23 words

The method of claim 1, wherein the adsorbent is regenerated before there is any breakthrough of hydrogen sulfide and/or ammonia from the adsorbent.

Claim 5

Dependent Claim 15 words

The method of claim 1, wherein the adsorbent is zeolite 4A, zeolite 5A or clinoptilolite.

Claim 6

Dependent Claim 20 words

The method of claim 1, wherein the adsorption temperature is in the range of from about 300° to 550° F.

Claim 7

Dependent Claim 23 words

The method of claim 1, wherein the period for the adsorption step is in the range of from about 0.2 to 2.0 hours.

Claim 8

Dependent Claim 23 words

The method of claim 6, wherein the period for the adsorption step is in the range of from about 0.75 to 1.5 hours.

Claim 9

Dependent Claim 244 words

A process for the conversion of hydrocarbon stream containing sulfur and/or nitrogen components in a reaction zone suitable for said conversion to produce a hydrocarbon product, said conversion being deleteriously affected by the presence of said sulfur and/or nitrogen components comprising: (a) catalytically reacting said hydrocarbon stream at a temperature and with sufficient molecular hydrogen to catalytically convert substantially all of the contained sulfur components to hydrogen sulfide an substantially all of the nitrogen componenets to ammonia, said temperature being such that the hydrocarbon stream is essentially in the vapor phase; (b) contacting the vaporous hydrogen sulfide and/or ammonia containing hydrocarbon stream with a ziolitic adsorbent selective for the adsorption of hydrogen sulfide and ammonia as compared to the hydrocarbon having a pore diameter less than or equal to 5 Angstrom at adsorption conditions sufficient to maintain the hydrocarbon stream in the vapor phase and capable of achieving the reduction of hydrogen sulfide and ammonia content in the hydrocarbon stream to provide a hydrocarbon stream having reduced hydrogen sulfide and ammonia content, said adsorbent being on an adsorption mode for a period of no more than from about 0.5 to 6.0 hours; and then (c) passing the hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content, while still in the vapor phase, to the reaction zone at conditions suitable for the conversion to produce the hydrocarbon product including temperatures and pressures sufficient to maintain the hydrocarbon and hydrocarbon product essentally in the vapor phase.

Claim 10

Dependent Claim 244 words

A process for the conversion of hydrocarbon stream containing sulfur and/or nitrogen components in a reaction zone suitable for said conversion to produce a hydrocarbon product, said conversion being deleteriously affected by the presence of said sulfur and/or nitrogen components comprising: (a) catalytically reacting said hydrocarbon stream at a temperature and with sufficient molecular hydrogen to catalytically convert substantially all of the contained sulfur components to hydrogen sulfide an substantially all of the nitrogen componenets to ammonia, said temperature being such that the hydrocarbon stream is essentially in the vapor phase; (b) contacting the vaporous hydrogen sulfide and/or ammonia containing hydrocarbon stream with a ziolitic adsorbent selective for the adsorption of hydrogen sulfide and ammonia as compared to the hydrocarbon having a pore diameter less than or equal to 5 Angstrom at adsorption conditions sufficient to maintain the hydrocarbon stream in the vapor phase and capable of achieving the reduction of hydrogen sulfide and ammonia content in the hydrocarbon stream to provide a hydrocarbon stream having reduced hydrogen sulfide and ammonia content, said adsorbent being on an adsorption mode for a period of no more than from about 0.5 to 6.0 hours; and then (c) passing the hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content, while still in the vapor phase, to the reaction zone at conditions suitable for the conversion to produce the hydrocarbon product including temperatures and pressures sufficient to maintain the hydrocarbon and hydrocarbon product essentally in the vapor phase.

Claim 11

Dependent Claim 308 words

An integrated process for the hydrodesulfurization and isomerization of hydrocarbon feed containing at least four carbon atoms which feed contains at least sulfur and/or nitrogen components comprising: (a) providing said hydrocarbon feed at a temperature and with sufficient molecular hydrogen to catalytically convert substantially all of the contained sulfur components to hydrogen sulfide and substantially all of the contained nitrogen components to ammonia, said temperature being such that the hydrocarbon feed is essentially in the vapor phase; (b) passing the vaporous hydrocarbon feed mixture to a catalytic reaction zone, containing a catalytically effective amount of catalyst under hydrogen sulfide and ammonia forming conditions to provide substantially all of the contained sulfur components and nitrogen components in the hydrocarbon feed mixture in the form of hydrogen sulfide and ammonia, respectively, and thereby produce a hydrogen sulfide and/or ammonia vaporous containing hydrocarbon stream; (c) maintaining the hydrogen sulfide and/or ammonia containing hydrocarbon stream at a temperature at least sufficient to maintain the hydrogen sulfide and/or ammonia containing hydrocarbon stream essentially in the vapor phase and contacting the hydrogen sulfide and/or ammonia containing stream with a zeolitic adsorbent selective for the adsorption of hydrogen sulfide and ammonia as compared to the hydrocarbon at adsorption conditions sufficient to maintain the hydrocarbon stream in the vapor phase and capable of achieving the reduction in hydrogen sulfide and ammonia content in the hydrocarbon stream to provide a hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content; and (d) maintaining and hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content in the vapor phase and passing the vaporous stream to an isomerization reaction zone containing a catalytically effective amount of isomerization catalyst which is deleteriously affected by the presence of hydrogen sulfide and/or ammonia under isomerization conditions sufficient to maintain the stream in the vapor phase and to provide a vaporous isomerate containing product effluent.

Claim 12

Dependent Claim 308 words

An integrated process for the hydrodesulfurization and isomerization of hydrocarbon feed containing at least four carbon atoms which feed contains at least sulfur and/or nitrogen components comprising: (a) providing said hydrocarbon feed at a temperature and with sufficient molecular hydrogen to catalytically convert substantially all of the contained sulfur components to hydrogen sulfide and substantially all of the contained nitrogen components to ammonia, said temperature being such that the hydrocarbon feed is essentially in the vapor phase; (b) passing the vaporous hydrocarbon feed mixture to a catalytic reaction zone, containing a catalytically effective amount of catalyst under hydrogen sulfide and ammonia forming conditions to provide substantially all of the contained sulfur components and nitrogen components in the hydrocarbon feed mixture in the form of hydrogen sulfide and ammonia, respectively, and thereby produce a hydrogen sulfide and/or ammonia vaporous containing hydrocarbon stream; (c) maintaining the hydrogen sulfide and/or ammonia containing hydrocarbon stream at a temperature at least sufficient to maintain the hydrogen sulfide and/or ammonia containing hydrocarbon stream essentially in the vapor phase and contacting the hydrogen sulfide and/or ammonia containing stream with a zeolitic adsorbent selective for the adsorption of hydrogen sulfide and ammonia as compared to the hydrocarbon at adsorption conditions sufficient to maintain the hydrocarbon stream in the vapor phase and capable of achieving the reduction in hydrogen sulfide and ammonia content in the hydrocarbon stream to provide a hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content; and (d) maintaining and hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content in the vapor phase and passing the vaporous stream to an isomerization reaction zone containing a catalytically effective amount of isomerization catalyst which is deleteriously affected by the presence of hydrogen sulfide and/or ammonia under isomerization conditions sufficient to maintain the stream in the vapor phase and to provide a vaporous isomerate containing product effluent.

Claim 13

Dependent Claim 311 words

An integrated process for the hydrodesulfurization and catalytic reforming of hydrocarbon feed containing at least four carbon atoms which feed contains at least sulfur and/or nitrogen components comprising: (a) providing said hydrocarbon feed at a temperature and with sufficient molecular hydrogen to catalytically convert substantially all of the contained sulfur components to hydrogen sulfide and substantially all of the contained nitrogen components to ammonia, said temperature being such that the hydrocarbon feed is essentially in the vapor phase; (b) passing the vaporous hydrocarbon feed mixture to a catalytic reaction zone containing a catalytically effective amount of catalyst under hydrogen sulfide and ammonia forming conditions to provide substantially all of the contained sulfur components and nitrogen components in the hydrocarbon feed mixture in the form of hydrogen sulfide and ammonia, respectively, and thereby produce a hydrogen sulfide and/or ammonia vaporous containing hydrocarbon stream; (c) maintaining the hydrogen sulfide and/or ammonia containng hydrocarbon stream at a temperature at least sufficient to maintain the hydrogen sulfide and/or ammonia containing hydrocarbon stream essentially in the vapor phase and contacting the hydrogen sulfide and/or ammonia containing hydrocarbon stream with a zeolitic adsorbent selective for the adsorption of hydrogen sulfide and ammonia as compared to the hydrocarbon at adsorption conditions sufficient to maintain the hydrocarbon stream in the vapor phase and capable of achieving the reduction in hydrogen sulfide and ammonia content in the hydrocarbon stream to provide a hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content; and (d) maintaining the hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content in the vapor phase and passing the vaporous stream to a catalytic reforming reaction zone containing a catalytically effective amount of reforming catalyst which is deleteriously affected by the presence of hydrogen sulfide and/or ammonia under reforming conditions sufficient to maintain the stream in the vapor phase and to provide a vaporous reformate containing product effluent.

Claim 14

Dependent Claim 311 words

An integrated process for the hydrodesulfurization and catalytic reforming of hydrocarbon feed containing at least four carbon atoms which feed contains at least sulfur and/or nitrogen components comprising: (a) providing said hydrocarbon feed at a temperature and with sufficient molecular hydrogen to catalytically convert substantially all of the contained sulfur components to hydrogen sulfide and substantially all of the contained nitrogen components to ammonia, said temperature being such that the hydrocarbon feed is essentially in the vapor phase; (b) passing the vaporous hydrocarbon feed mixture to a catalytic reaction zone containing a catalytically effective amount of catalyst under hydrogen sulfide and ammonia forming conditions to provide substantially all of the contained sulfur components and nitrogen components in the hydrocarbon feed mixture in the form of hydrogen sulfide and ammonia, respectively, and thereby produce a hydrogen sulfide and/or ammonia vaporous containing hydrocarbon stream; (c) maintaining the hydrogen sulfide and/or ammonia containng hydrocarbon stream at a temperature at least sufficient to maintain the hydrogen sulfide and/or ammonia containing hydrocarbon stream essentially in the vapor phase and contacting the hydrogen sulfide and/or ammonia containing hydrocarbon stream with a zeolitic adsorbent selective for the adsorption of hydrogen sulfide and ammonia as compared to the hydrocarbon at adsorption conditions sufficient to maintain the hydrocarbon stream in the vapor phase and capable of achieving the reduction in hydrogen sulfide and ammonia content in the hydrocarbon stream to provide a hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content; and (d) maintaining the hydrocarbon stream having reduced hydrogen sulfide and/or ammonia content in the vapor phase and passing the vaporous stream to a catalytic reforming reaction zone containing a catalytically effective amount of reforming catalyst which is deleteriously affected by the presence of hydrogen sulfide and/or ammonia under reforming conditions sufficient to maintain the stream in the vapor phase and to provide a vaporous reformate containing product effluent.

Claim 15

Independent Claim 24 words

The method of claims 1, 8, 9, or 10, wherein the adsorption conditions are essentially the same as the conditions within the reaction zone.

Claim 16

Independent Claim 23 words

The method of claims 1, 8, 9, or 10, wherein the hydrocarbon stream is light straight run gasoline, light hydrocrackate, or light reformate.

Claim 17

Independent Claim 19 words

The method of claims 1 or 8, wherein the reaction zone is an isomerization reactor or a catalytic reformer.

Claim 18

Dependent Claim 31 words

The method of claim 9, wherein the adsorption conditions and the isomerization conditions are both in the range of from about 300° to 550° F. and about 150 to 400 psig.

Claim 19

Independent Claim 18 words

The method of claims 8, 9, or 10, wherein the adsorbent is zeolite 4A, zeolite 5A, or clinoptilolite.

Claim 20

Independent Claim 31 words

The method of claims 1, 8, 9, or 10, wherein the amount of sulfur components present in the hydrocarbon stream is in the range of from about 0 to 400 ppmw.

Claim 21

Independent Claim 31 words

The method of claims 1, 8, 9, or 10, wherein the amount of nitrogen components present in the hydrocarbon streama is in the range of from about 0 to 50 ppmw.

Claim 22

Dependent Claim 32 words

The method of claim 10, wherein the adsorption conditions and the catalytic reforming conditions are both in the range of from about 500° to 900° F. and about 100 to 400 psig.

Claim 23

Independent Claim 28 words

The method of claims 8, 9, or 10, wherein the adsorbent is regenerated before there is any breakthrough of the at least one other component from the adsorbent.

Claim 24

Independent Claim 26 words

The method of claims 8, 9, or 10, wherein the period for the adsorption step is in the range of from about 0.2 to 2.0 hours.

Claim 25

Independent Claim 22 words

The method of claims 8, or 10, wherein the adsorption temperature is in the range of from about 300° to 550° F.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-05-15	1992-11-14	1993-05-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-05-15	1996-11-14	1997-05-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-05-15	2000-11-14	2001-05-16	$7700.00	Window Closed / Lapsed

Chemical processing with an operational step sensitive to a feedstream component

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag