초록 ▼

In order to provide a temperature- and acid-resistant catalyst carrier based on a gas-pervious carrier body and a porous surface layer having a high silica content, while dispensing with a washcoat, the carrier body and the surface layer are designed as a chemically and physically homogeneous struct

In order to provide a temperature- and acid-resistant catalyst carrier based on a gas-pervious carrier body and a porous surface layer having a high silica content, while dispensing with a washcoat, the carrier body and the surface layer are designed as a chemically and physically homogeneous structure shaped in a single operation. The SiO2 content amounts to at least 99% by weight and has a specific surface from 5 m2/g to 50 m2/g. In a process for producing a catalyst carrier made of synthetic, amorphous silica particles with more than 99% by weight SiO2, a paste is prepared with the particles, a liquid, and a binder. Plastifying agents are added to the paste and the paste is continuously extruded into a monolithic greenware strand. The alkali and alkaline earth content of the paste is set at no more than 200 ppm and the greenware is cut to length and sintered at a temperature in a range between 800°C. and 1400°C.

대표청구항 ▼

Catalyst support comprising a gas-permeable support body with a porous surface layer wherein the support body and the surface layer form a chemically and physically uniform structure shaped in one common procedure and having an SiO2content of at least 99 wt. % and a specific surface area between 5 m

Catalyst support comprising a gas-permeable support body with a porous surface layer wherein the support body and the surface layer form a chemically and physically uniform structure shaped in one common procedure and having an SiO2content of at least 99 wt. % and a specific surface area between 5 m2/g and 50 m2/g, said support body having an alkali and alkaline earth content of no more than 200 ppm. Method for preparing a catalyst support comprising the following steps forming a plastic dough comprising silica particles having an SiO2 content of at least 99.5%, a fluid, a binding agent, and plasticizers, said dough having an alkali and alkaline earth content of not more than 200 ppm, extruding said dough to form a monolithic greenware, and sintering said greenware at a temperature in the range of 800°C. to 1400°C.