US4478800A — Process for removal of sulfur compounds from gases

Claim 1

Independent Claim 159 words

A process for removal of hydrogen sulfide, carbonyl sulfide and/or carbon disulfide from gases, comprising: (a) passing the gas containing hydrogen sulfide, carbonyl sulfide or carbon disulfide, at a temperature of from 5° to 800° C. over an absorption mass including metal oxides which react with the sulfur compound to give metal-sulfur compounds and which metal oxides are present on an inert, refractory support having a specific surface area of more than 10 m 2 per g, (b) said support being loaded with the metal oxide in an amount of at least 5% by weight, calculated as metal of the active component and relative to the weight of the support, (c) at least 20% by weight of the metal oxides on the support being in finely divided form with a particle size of less than 40 nanometers, and (d) regenerating the support loaded with metal-sulfur compounds by oxidizing said metal-sulfur compounds by passing over of gases including oxidizing agents.

Claim 2

Dependent Claim 159 words

A process for removal of hydrogen sulfide, carbonyl sulfide and/or carbon disulfide from gases, comprising: (a) passing the gas containing hydrogen sulfide, carbonyl sulfide or carbon disulfide, at a temperature of from 5° to 800° C. over an absorption mass including metal oxides which react with the sulfur compound to give metal-sulfur compounds and which metal oxides are present on an inert, refractory support having a specific surface area of more than 10 m 2 per g, (b) said support being loaded with the metal oxide in an amount of at least 5% by weight, calculated as metal of the active component and relative to the weight of the support, (c) at least 20% by weight of the metal oxides on the support being in finely divided form with a particle size of less than 40 nanometers, and (d) regenerating the support loaded with metal-sulfur compounds by oxidizing said metal-sulfur compounds by passing over of gases including oxidizing agents.

Claim 3

Dependent Claim 13 words

Process according to claim 1, characterized in that the gases are reducing gases.

Claim 4

Dependent Claim 16 words

Process according to claim 2, characterized in that coal gas is used as the reducing gas.

Claim 5

Dependent Claim 52 words

Process according to claim 3, characterised in that the coal gas, as a dry gas, contains the following components: 2- 50% of H 2 18-70% of CO 2-30% of CO 2 0-15% of CH 4 0.01-5% of H 2 S <-2% of COS, CS 2 , HCl, NH 3 and other components.

Claim 6

Dependent Claim 13 words

Process according to claim 1, characterised in that the gases are natural gases.

Claim 7

Dependent Claim 40 words

Process according to claim 1, characterised in that the support is loaded with the metal oxide in an amount of at least 20% by weight, calculated as metal of the active component and relative to the weight of the support.

Claim 8

Dependent Claim 24 words

Process according to claim 1, characterised in that the absorption of the sulfur compounds is carried out at temperatures of 200° to 800° C.

Claim 9

Dependent Claim 14 words

Process according to claim 1, characterised in that the metal oxide is iron oxide.

Claim 10

Dependent Claim 31 words

Process according to claim 1, characterised in that at least 50% by weight of the metal oxides on the support are present with a particle size of less than 40 nm.

Claim 11

Dependent Claim 32 words

Process according to claim 1, characterised in that regeneration is carried out at temperatures of 20° to 700° C. and sulfur, if present, is driven off at temperatures above about 200° C.

Claim 12

Dependent Claim 19 words

Process according to claim 1, characterised in that regeneration is carried out at temperatures of 200° to 700° C.

Claim 13

Dependent Claim 21 words

Process according to claim 1, characterised in that the gas used for regeneration contains less than 5% by volume of oxygen.

Claim 14

Dependent Claim 33 words

Process according to claim 1, characterised in that the gases containing sulfur compounds contain oxygen in an amount which is such that the atomic ratio of oxygen to sulfur does not exceed 1.

Claim 15

Dependent Claim 17 words

Process according to claim 1, wherein the gas passed over the absorption mass contains H 2 S.

Claim 16

Dependent Claim 15 words

Process according to claim 1, wherein the gas passed over the absorption mass contains COS.

Claim 17

Dependent Claim 17 words

Process according to claim 1, wherein the gas passed over the absorption mass contains CS 2 .

Claim 18

Dependent Claim 151 words

A process for removal of mercaptans and/or thiophene from gases, comprising: (a) passing the gas containing mercaptan or thiophene at a temperature of from 5° to 800° C. over an absorption mass including metal oxides which react with the sulfur compound to give metal-sulfur compounds and which metal oxides are present on an inert, refractory support having a specific surface area of more than 10 m 2 per g, (b) said support being loaded with the metal oxide in an amount of at least 5% by weight, calculated as metal of the active component and relative to the weight of the support, (c) at least 20% by weight of the metal oxides on the support being in finely divided form with a particle size of less than 40 nanometers, and (d) regenerating the support loaded with metal-sulfur compounds by oxidizing said metal-sulfur compounds by passing over of gases including oxidizing agents.

Claim 19

Dependent Claim 151 words

A process for removal of mercaptans and/or thiophene from gases, comprising: (a) passing the gas containing mercaptan or thiophene at a temperature of from 5° to 800° C. over an absorption mass including metal oxides which react with the sulfur compound to give metal-sulfur compounds and which metal oxides are present on an inert, refractory support having a specific surface area of more than 10 m 2 per g, (b) said support being loaded with the metal oxide in an amount of at least 5% by weight, calculated as metal of the active component and relative to the weight of the support, (c) at least 20% by weight of the metal oxides on the support being in finely divided form with a particle size of less than 40 nanometers, and (d) regenerating the support loaded with metal-sulfur compounds by oxidizing said metal-sulfur compounds by passing over of gases including oxidizing agents.

Claim 20

Dependent Claim 38 words

Process according to claim 6, wherein the support is loaded with the metal oxide in an amount of at least 40% by weight calculated as metal of the active component and relative to the weight of the support.

Claim 21

Dependent Claim 22 words

Process according to claim 7, wherein the absorption of the sulfur compounds is carried out at temperatures of 300° to 600° C.

Claim 22

Dependent Claim 29 words

Process according to claim 9, wherein at least 50% by weight of the metal oxides on the support are present with a particle size of less than 20 nanometers.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1987-10-23	1988-04-23	1988-10-23	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1991-10-23	1992-04-23	1992-10-23	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1995-10-23	1996-04-23	1996-10-23	$7700.00	Window Closed / Lapsed

Process for removal of sulfur compounds from gases

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