Novel combustion process for an organic substrate

Claim 2

A process for the combustion of an organic substrate wherein said process comprises intimately contacting said organic substrate, at a temperature below the temperature of ignition of the organic substrate, with an organophilic catalyst bed comprised of a metal-containing zeolite having a silica to alumina ratio of at least 10, wherein the metal is at least one of platinum, palladium, copper, nickel, chromium and manganese; and combusting the organic substrate by an adiabatic temperature rise in the catalyst bed, in the presence of an oxygen-containing gas, after sufficient organic substrate has been adsorbed by the catalyst bed.

Claim 3

A process for the combustion of an organic substrate contained in a dilute stream thereof which comprises: (a) introducing the dilute stream at a temperature below the temperature of ignition of the organic substrate in the dilute stream into a reaction zone containing an organophilic catalyst bed comprised of a metal-containing zeolite having a silica to alumina ratio of at least 10, wherein the metal is at least one of platinum, palladium, copper, nickel, chromium and manganese; (b) passing said dilute stream into intimate contact with the catalyst bed of metal-containing zeolite such that the organic substrate is adsorbed by the organophilic catalyst bed; (c) heating the catalyst bed or portion thereof intermittently to about the temperature of ignition of the organic substrate in the dilute stream; and (d) combusting the adsorbed organic substrate, when sufficient organic substrate has been adsorbed by the catalyst bed, in the presence of an oxygen-containing gas, by means of an adiabatic temperature rise in the catalyst bed to form essentially carbon dioxide and water vapor.

Claim 4

A process for the combustion of an organic substrate contained in a dilute stream thereof which comprises: (a) introducing the dilute stream at a temperature below the temperature of ignition of the organic substrate in the dilute stream into a reaction zone containing an organophilic catalyst bed comprised of a metal-containing zeolite having a silica to alumina ratio of at least 10, wherein the metal is at least one of platinum, palladium, copper, nickel, chromium and manganese; (b) passing said dilute stream into intimate contact with the catalyst bed of metal-containing zeolite such that the organic substrate is adsorbed by the organophilic catalyst bed; (c) heating the catalyst bed or portion thereof intermittently to about the temperature of ignition of the organic substrate in the dilute stream; and (d) combusting the adsorbed organic substrate, when sufficient organic substrate has been adsorbed by the catalyst bed, in the presence of an oxygen-containing gas, by means of an adiabatic temperature rise in the catalyst bed to form essentially carbon dioxide and water vapor.

Claim 5

The process of claim 1 or 2 wherein the metal-containing zeolite has a thermal and hydrothermal stability of at least 600° C.

Claim 6

The process of claim 1 or 2 wherein the metal is copper.

Claim 7

The process of claim 1 or 2 wherein the metal is platinum.

Claim 8

The process of claim 1 or 2 wherein the oxygen-containing gas is air.

Claim 9

The process of claim 1 or 2 wherein the metal-containing zeolite is a ZSM-5-type zeolite.

Claim 10

The process of claim 1 or 2 wherein the metal-containing zeolite is an organophilic zeolite composition having in the dehydrated state a composition in terms of mole ratios of oxides as: 0.01-2.0Z.sup.++ O:0-0.2M.sub.2/n O:Al.sub.2 O.sub.3 :20-100SiO.sub.2 wherein Z ++ is at least one cation from the metals platinum, palladium, copper, nickel, chromium and manganese and M is at least one cation having a valence "n", said composition having a characteristic X-ray powder diffraction pattern containing at least the d-spacings of Table I.

Claim 11

The process of claim 8 wherein M represents an alkali metal cation.

Claim 12

The process of claim 8 wherein the SiO 2 /Al 2 O 3 mole ratio is from 35 to 85.

Claim 13

The process of claim 8 wherein the SiO 2 /Al 2 O 3 mole ratio is from 35 to 55.

Claim 14

The process of claim 8 wherein the metal-containing zeolite is an organophilic zeolite composition having in the dehydrated state a composition in terms of mole ratios of oxides as: 1.6-2.0Cu.sup.++ O:0-0.2M.sub.2/n O:Al.sub.2 O.sub.3 :20-100SiO.sub.2 wherein M is at least one cation having a valence of "n", said composition having a characteristic X-ray powder diffraction pattern containing at least the d-spacings of Table I.

Claim 15

The process of claim 12 wherein M represents an alkali metal cation.

Claim 16

The process of claim 12 wherein the SiO 2 /Al 2 O 3 mole ratio is from 35 to 85.

Claim 17

The process of claim 14 wherein the SiO 2 /Al 2 O 3 mole ratio is from 35 to 55.

Claim 18

The process of claim 8 wherein the metal containing zeolite is an organophilic zeolite composition having in the dehydrated state a composition in terms of mole ratios of oxides as: 0.01-1.0Pt.sup.++ O:0.2M.sub.2/n O:Al.sub.2 O.sub.3 :20-100SiO.sub.2 wherein M is at least one cation having a valence "n", said composition having a characteristic X-ray powder diffraction pattern containing at least the d-spacings of Table I.

Claim 19

The process of claim 16 wherein "M" represents an alkali metal cation.

Claim 20

The process of claim 16 wherein the SiO 2 /Al 2 O 3 mole ratio is from 35 to 85.

Claim 21

The process of claim 18 wherein the SiO 2 /Al 2 O 3 mole ratio is from 35 to 55.