US 6,638,492 B1Granted

Method for the catalytic oxidation of volatile organic compounds

AssigneeCondsiglio Nazionale Delle Ricerche

InventorsFrancesco Cino Matacotta, Gianluca Calestani, Chiara Dionigi, Petr Nozar

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Abstract

A catalyst for the full oxidation of volatile organic compounds (VOC), particularly hydrocarbons, and of CO to CO2, comprising: a non-stoichiometric crystalline compound conventionally designated by a formula which corresponds to A14Cu24O41 (I), where A is Sr or a solid solution of Sr with alkaline-earth metals, alkaline metals, lanthanides; or a non-stoichiometric crystalline compound conventionally designated by a formula which corresponds to B4Cu5O10 (II), where B is Ca or a solid solution of Ca with alkaline-earth metals, alkaline metals, lanthanides; or mixtures thereof; and in that it is prepared in a form which has a large specific surface area, preferably larger than 25 m2/g; a method for preparing the catalysts; their use in methods for the full oxidation of VOC and of CO to CO2; and the oxidation methods.

Claims8

Dependent claims

A method for full oxidation of volatile organic compounds (VOC) comprising a step of contacting the volatile compounds with a catalyst comprising a non-stoichiometric crystalline compound designated by a formula which corresponds to Al14Cu24O41 (I), where A is Sr or a solid solution of Sr with alkaline-earth metals, alkaline metals, lanthanides;

or a non-stoichiometric crystalline compound designated by a formula which corresponds to B4Cu5O10 (II), where B is Ca or a solid solution of Ca with alkaline-earth metals, alkaline metals, lanthanides;
or mixtures thereof, the catalyst being prepared in a form which has a large specific surface area, wherein the catalyst comprises 5% to 20% by weight of a non-stoichiometric crystalline compound designated by a formula which corresponds to A14Cu24O41 (I), where A is Sr or a solid solution of Sr with alkaline-earth metals, alkaline metals, lanthanides;
or a non-stoichiometric crystalline compound designated by a formula which corresponds to B4Cu5O10 (II), where B is Ca or solid solution of Ca with alkaline-earth metals, alkaline metals, lanthanides;
or mixtures thereof.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 09/590,454Filed 9 Jun 2000
Priority: IT BO99A031410 Jun 1999
Granted: 28 Oct 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B01J 37/0203
Impregnation: the impregnation liquid containing organic compounds
B01D 53/864
Catalytic processes: removing carbon monoxide or hydrocarbons
B01J 23/002
Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00: mixed oxides other than spinels, e.g. perovskite
B01J 23/78
Combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36: with alkali- or alkaline earth metals