Title: Catalytic product for the oxidative destruction of gaseous organic compounds and method for their preparation

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Claims: What is claimed is:

1. A catalyst for the oxidative destruction of gaseous organic compounds, which comprises between about 80 and about 50% of total catalyst weight of active ingredients and from about 20 to about 50% of total catalyst weight of a cold-shapable refractory excipient, wherein the active ingredients comprises from about 50% to about 85% by weight of rhombohedral manganese oxides, from 0 to about 30% by weight of manganous carbonate, from about 3 to about 10% by weight of cupric oxide, and from 0 to about 15% by weight of nickel oxides.

2. The catalyst of claim 1, wherein the refractory excipient is a cement.

3. The catalyst of claim 1, wherein the refractory excipient is a refractory earth.

4. The catalyst of claim 1, wherein the refractory excipient comprises about 30% of total catalyst weight and the active ingredients comprising about 70% of total catalyst weight comprise about 55% by weight of manganese oxides about 30% of manganous carbonate, about 5% of cupric oxide, and about 10% of nickel oxides.

5. The catalyst of claim 1, wherein the refractory excipient comprises about 30% of total catalyst weight and the active ingredients comprising about 70% of total catalyst weight comprise between about 80% and about 85% by weight of manganese oxides, between about 5% and about 10% by weight of cupric oxides, and between about 5% and about 15% by weight of nickel oxides.

6. The catalyst of claim 1, wherein the catalyst is shaped in a configuration selected from the group of configurations consisting of briquettes, rings, tubes, balls, rods, and granules.

7. The catalyst of claim 1, wherein said catalyst is supported on a shaped substrate, the shaped substrate having a configuration selected from among sheets, honeycombs, plates and grills.

8. The catalyst of claim 1, wherein said catalyst is supported on a substrate selected from refractory and metal substrates.

9. A method of making the catalyst of claim 1, which comprises:

treating saturated aqueous solutions of a soluble manganese salt, a soluble cupric salt, and a soluble nickel salt in ratios to yield from about 50 to about 85% by weight of manganese, from about 3% to about 10% by weight of copper, and from 0 to about 15% by weight of nickel with at least 5% excess of a saturated solution of a bicarbonate salt to obtain a precipitate of combined manganese, cupric, and nickel carbonates and hydroxycarbonates and a supernatent mother liquor;

adding to the precipitate of combined carbonates and hydroxycarbonates and the supernatant mother liquors a cold-shapable refractory excipient, wherein the excipient comprises from about 20% to about 50% of total weight, to form a paste;

shaping the paste to form particles of a definite geometrical configuration;

and heating the particles of a defined geometrical configuration in air at a temperature of at least 300.degree.C.

10. A method of making the catalyst of claim 1, which comprises:

preparing a mixture containing between about 50% and about 85% by weight of manganous carbonate, between about 3% and about 10% by weight of cupric hydroxycarbonate, and from 0 to about 15% by weight of nickel hydroxycarbonate;

incorporating in the mixture from about 20% to about 50% of total weight of a refractory excipient, selected from a cement and a refractory earth, to form a paste;

fabricating the paste into a definite geometrical configuration;

and heating said paste fabricated into a definite geometrical configuration in air at a temperature of at least 300.degree.C.

11. A method of making the catalyst of claim 1, which comprises:

preparing a mixture containing between about 50% and about 85% by weight of manganous carbonate, between about 3% and about 10% by weight of cupric hydroxycarbonate, and from 0 to about 15% of nickel hydroxycarbonate;

incorporating in the mixture from about 20% to about 50% of total weight of a refractory excipient, selected from a cement and a refractory earth, to form a paste;

depositing the paste on a shaped substrate selected from refractory and metallic substrates; and

heating said paste on the shaped substrate in air at a temperature of at least 300.degree.C.

12. A method of making the catalyst of claim 1, which comprises:

preparing a mixture containing between about 80% and about 85% by weight of manganous carbonate, between about 5% and about 10% by weight of cupric hydroxycarbonate, and between about 5% and about 15% by weight of nickel hydroxycarbonate;

drying the mixture and heating the mixture in air at a temperature above 300.degree.C;

incorporating in the mixture dried and heated in air an excipient, selected from cement and a refractory earth to make from about 30% to about 50% by weight of catalyst obtained, to form a paste;

fabricating the paste into a definite geometrical configuration; and

permitting said paste to harden.

13. A method of making the catalyst of claim 1, which comprises:

preparing a mixture containing between about 80% and about 85% by weight of manganous carbonate, between about 5% and about 10% by weight of cupric hydroxycarbonate, and between about 5% and about 15% by weight of nickel hydroxycarbonate;

drying the mixture and heating the mixture in air at a temperature above 300.degree.C;

incorporating in the mixture dried and heated in air an excipient, selected from cement and a refractory earth to make from about 30% to about 50% by weight of catalyst obtained, to form a paste;

depositing the paste on a shaped metallic substrate; and

permitting said paste to harden.

14. The method of claim 10, wherein said paste fabricated into a definite geometrical configuration is heated in air at a temperature between about 600.degree.C and about 1000.degree. C.

15. The method of claim 12, wherein said mixture is dried and heated in air at a temperature between about 600.degree.C and about 1000.degree.C.
Other info:

Inventors: Belliot, Christian (Paris, FR)
Cheylan, Etienne (Paris, FR)
Madelaine, Serge (Paris, FR)
Ebbing, Johannes (Paris, FR)

Application Number: 380721
Filing Date: 1973-07-19
Publication_date: 1976-02-17
Assignee: Compagnie Francaise Thomson Houston-Hotchkiss Brandt (Paris, FR)
Primary Class(es): 502/174 423/213.2, 423/245.1, 502/176, 502/245, 502/324, 502/527.19
Other Classes:
US Patent Ref:

1345323	Jun, 1920	Frazer et al.	252/471.
1418246	May, 1922	Frazer et al.	252/471.
3133029	May, 1964	Hoekstra	423/213.
3150922	Sep, 1964	Ashley	423/213.
3433581	Mar, 1969	Stephens et al.	423/213.
3436356	Apr, 1969	Kato et al.	423/213.
3498928	Mar, 1970	Cho et al.	423/213.
3663457	May, 1972	Tamura et al.	252/471.

Other Refs:
Primary Examiner: Demers, Arthur P.
Assistant Examiner:
Attorney: Greigg; Edwin E.