US6251819 Silicon carbide foam with high specific surface area and improved mechanical properties

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United States of America

Application Number 09446135

Application Date 15.02.2000

Publication Number 6251819

Publication Date 26.06.2001

Grant Number 6251819

Grant Date 26.06.2001

Publication Kind B1

IPC

CPC

Applicants Pechiney Recherche

Inventors Prin, Marie
Ollivier, Benoist

Agents Dennison, Scheiner, Schultz & Wakeman

Priority Data 9709743 25.07.1997 FR

Title

(EN) Silicon carbide foam with high specific surface area and improved mechanical properties

Abstract

(EN)

Silicon carbide foam useful as a catalyst support has a BET specific surface area of at least 5 m²/g, and a compression strength exceeding 0.2 MPa. The foam is prepared by impreganting an organic foam with a suspension of silicon in a resin containing a cross-linking agent, incompletely cross-linking the resin, carbonizing the foam and resin, and carburizing the silicon.

B	PERFORMING OPERATIONS; TRANSPORTING
01	PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
27	Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
20	Carbon compounds
22	Carbides
224	Silicon carbide

B	PERFORMING OPERATIONS; TRANSPORTING
01	PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
27	Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
20	Carbon compounds

B	PERFORMING OPERATIONS; TRANSPORTING
01	PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
35	Catalysts, in general, characterised by their form or physical properties

B	PERFORMING OPERATIONS; TRANSPORTING
01	PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
35	Catalysts, in general, characterised by their form or physical properties
02	Solids
10	characterised by their surface properties or porosity

C	CHEMISTRY; METALLURGY
04	CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B	LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
38	Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof

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1. US6251819 - Silicon carbide foam with high specific surface area and improved mechanical properties

C	CHEMISTRY; METALLURGY
04	CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B	LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE
38	Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
0022	obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors