초록 ▼

An immobilizing structure for use in immobilizing a ceramic monolith in a catalytic converter employs a molding which comprises finely divided metal oxide and fibers which do not represent a health risk, has a density of 100-240 kg/m3,and has a compression to at least 96% of its original thickness a

An immobilizing structure for use in immobilizing a ceramic monolith in a catalytic converter employs a molding which comprises finely divided metal oxide and fibers which do not represent a health risk, has a density of 100-240 kg/m3,and has a compression to at least 96% of its original thickness at a pressure of 1 bar applied for a period of 5 minutes, and exhibits a recovery of this compression to more than 70% of its initial value within about one minute after removal of the pressure.

대표청구항 ▼

An immobilizing structure for use in immobilizing a ceramic monolith in a catalytic converter employs a molding which comprises finely divided metal oxide and fibers which do not represent a health risk, has a density of 100-240 kg/m3,and has a compression to at least 96% of its original thickness a

An immobilizing structure for use in immobilizing a ceramic monolith in a catalytic converter employs a molding which comprises finely divided metal oxide and fibers which do not represent a health risk, has a density of 100-240 kg/m3,and has a compression to at least 96% of its original thickness at a pressure of 1 bar applied for a period of 5 minutes, and exhibits a recovery of this compression to more than 70% of its initial value within about one minute after removal of the pressure. y weight of organic fibers and 0-25% by weight of refractory material which expands at a temperature above 300° C. 3. The catalytic converter of claim 2, wherein the finely divided metal oxide is selected from the group consisting of pyrogenic silicas, arc silicas, low-alkali precipitated silicas, silicon dioxide aerogels, aluminum oxides, and mixtures thereof. 4. The catalytic converter of claim 3, wherein the fibers which do not represent a health risk are selected from the group consisting of high-temperature-resistant fibers having an SiO2content of >60% by weight, textile fibers made from R glass, textile fibers made from S2 glass, textile fibers made from ECR glass, fibers made from aluminum silicate, and mixtures thereof. 5. The catalytic converter of claim 3, wherein the organic fibers are selected from the group consisting of plastic fibers, natural fibers, viscose fibers, cotton fibers, cellulose, graphite, and carbon fibers, and mixtures thereof. 6. The catalytic converter of claim 2, wherein the opacifier is selected from the group consisting of ilmenite, titanium dioxide, iron(II)/iron(III) mixed oxides chromium dioxide, zirconium oxide, manganese dioxide, iron oxide, rutile, zirconium silicate, silicon carbide, and mixtures thereof. 7. The catalytic converter of claim 2, wherein the fibers which do not represent a health risk are selected from the group consisting of high-temperature-resistant fibers having an SiO2content of >60% by weight, textile fibers made from R glass, textile fibers made from S2 glass, textile fibers made from ECR glass, fibers made from aluminum silicate, and mixtures thereof. 8. The catalytic converter of claim 2, wherein the organic fibers are selected from the group consisting of plastic fibers, natural fibers, viscose fibers, cotton fibers, cellulose, graphite, and carbon fibers, and mixtures thereof. 9. The catalytic converter of claim 1, wherein the finely divided. metal oxide is selected from the group consisting of pyrogenic silicas, arc silicas, low-alkali precipitated silicas, silicon dioxide aerogels, aluminum oxides analogously prepared, and mixtures thereof. 10. The catalytic converter of claim 9, wherein the opacifier is selected from the group consisting of ilmenite, titanium dioxide, iron(II)/iron(III) mixed oxides, chromium dioxide, zirconium oxide, manganese dioxide, iron oxide, rutile, zirconium silicate, silicon carbide, and mixtures thereof. 11. The catalytic converter of claim 9, wherein the fibers which do not represent a health risk are selected from the group consisting of high-temperature-resistant fibers having an SiO2content of >60% by weight, textile fibers made from R glass, textile fibers made from S2 glass, textile fibers made from ECR glass, fibers made from aluminum silicate, and mixtures thereof. 12. The catalytic converter of claim 9, wherein the organic fibers are selected from the group consisting of plastic fibers, natural fibers, viscose fibers, cotton fibers, cellulose, graphite, and carbon fibers, and mixtures thereof. 13. The catalytic converter of claim 1, wherein the opacifier is selected from the group consisting of ilmenite, titanium dioxide, iron(II)/iron(III) mixed oxides chromium dioxide, zirconium oxide, manganese dioxide, iron oxide, rutile, zirconium silicate, silicon carbide, and mixtures thereof. 14. The catalytic converter of claim 1, wherein the opacifier is silicon carbide. 15. The catalytic converter of claim 1, wherein the fibers which do not represent a health risk are selected from the group consisting of high-temperature-resistant fibers having an SiO2content of >60% by weight, textile fibers made from R glass, textile fibers made from S2 glass, textile fibers made from ECR glass, fibers made from aluminum silicate, and mixtures thereof. 16. The catalytic converter of claim 1, wherein the organic fibers are selected from the group consisting of plastic fibers, natural fibers, visc