Ceramic fiber molding for manifold reactors

DETAILED DESCRIPTION What is claimed is: 1.
A ceramic fiber molding comprising Al.
sub.
2 O.
sub.
3 --SiO.
sub.
2 or SiO.
sub.
2 ceramic fibers and a binder molded into a product having a hardness of 20.
degree.
-55.
degree.
as measured by the Japan Rubber Association Standard SRIS-0101, a tensile strength of 120-1500 g/cm.
sup.
2, and a molded density of 0.
06-0.
35 g/cm.
sup.
3.
2.
The ceramic fiber molding of claim 1, in which the molded density is in the range of 0.
15-0.
35 g/cm.
sup.
3 and the fibers are Al.
sub.
2 O.
sub.
3 --SiO.
sub.
2.
3.
The ceramic fiber molding of claim 1, in which the molded density is in the range of 0.
06-0.
20 g/cm.
sup.
3 and the fibers are SiO.
sub.
2.
4.
The ceramic fiber molding of claim 1, in which the binder employed is selected from the group consisting of Al.
sub.
2 O.
sub.
3 sol and silica sol.
5.
The ceramic fiber molding of claim 1, in which the binder employed is selected from the group consisting of starch, polyvinyl alcohol, phenol resin and carboxy methyl cellulose.
6.
A method of manufacturing a ceramic fiber molding comprising adding a binder to ceramic fibers selected from the group consisting of Al.
sub.
2 O.
sub.
3 --SiO.
sub.
2 and SiO.
sub.
2 ceramic fibers, and solidifying the resulting mixture to form a product having a hardness of 20.
degree.
-55.
degree.
, a tensile strength of 120-1500 g/cm.
sup.
2 and a molded density of 0.
06-0.
35 g/cm.
sup.
3.
7.
The method of claim 6, in which a molded product is obtained by suction filtering of a solution of said ceramic fibers in said binder.
8.
The method of claim 6, in which the ceramic fibers are 5.
6-33 mm in length and 2.
5-4.
5.
mu.
in diameter.
9.
The ceramic fiber molding of claim 1, which contains 2-6% by weight of said binder.




Description:
In recent years research has been pursued with a view to developing a recombustion type exhaust gas purifier which reburns the carbon monoxide and hydrocarbons contained in automotive emissions and transforms them into harmless carbon dioxide and water; and as a result manifold reactors having heat-insulated construction has come into practical use