Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Patent
1987-10-15
1989-04-04
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Silicon containing or process of making
502439, 4232135, B01J 2108, B01J 2364, B01J 2372, B01J 2384
Patent
active
048187445
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a process for the production of a catalyzer as well as to a catalyzer for the removal of polluting components from the exhaust gases of internal combustion engines, particularly Otto-engines, by using carrier materials provided with catalytically active metallic compounds.
BACKGROUND OF THE INVENTION
It is a known fact that the exhaust gases coming from internal combustion engines contain polluting components, such as CO, NOx, SO.sub.2, and others.
In order to remove these components from the exhaust gases of internal combustion engines, a great number of catalyzer types, having the most various compositions, has been proposed. All these known catalyzers have the disadvantage that they can not be operated with leaded gasoline, because the lead content after a short time leads to the destruction of the catalyzer. For this reason, the tendency to use unleaded gasoline has emerged, but this is not appropriate for all engine types existing on the market, particularly not for engines with carburetors. Departing from this state of the art, the invention has the object to create a process for the production of a catlyzer and a catalyzer for the removal of polluting components from exhaust gases of internal combustion engines, by avoiding the aforementioned disadvantages and by establishing a process which is not only simple and cost efficient but also produces a catalyzer which removes the polluting components to a large extent, can be operated with leaded gasoline and has a comparatively long life.
SUMMARY OF THE INVENTION
The invention relates to a process for the production of a catalyzer and a catalyzer for the removal of polluting components from exhaust gases of internal combustion engines, particularly Otto-engines, by using carrier materials provided with catalytically effective metallic compounds. The catalyzer is not only simple and cost-effective to produce but also is very efficient at removing polluting components from exhaust gases, can be operated with leaded gasoline, and has a comparatively long life. Components of the catalyzer include approx. 22-26% by weight of cobalt oxide, approx. 8-15% by weight manganous oxide, approx. 4-6% by weight copper oxide, approx. 25-35% by weight clay, and approx. 27-35% by weight talc. All these components are first premixed together in a dry powder form, homogenized and brought to the desired final particle size. Subsequently the powder mixture to be plastified is agitated in a mixer and granulated through a sieve. Resultant granulate is then pressed into molds to be dried at approx. 50-150 degrees C. and then burned at a temperature of approx. 850-900 degrees C.
BRIEF DESCRIPTION OF THE DRAWING
An embodiment example of the invention is more particularly described with the aid of the drawing, which shows:
FIG. 1 as a top view of the catalyzer, and
FIG. 2 as a sectioned lateral view.
A catalyzer plate, having an oval basic shape and provided with a multitude of passage channels 2, is marked with 1. For simplicity, the passage channels 2 are marked only on one fourth of the representation of the catalyzer. The margin of the catalyzer is marked with 3.
As can be seen particularly from FIG. 2, the margin 3 of the catalyzer protrudes like a collar with respect to the backside of the catalyzer, seen in the direction of the flow, as marked with 4. Within the collar-like protruding margin 4 an after-expansion chamber 5 is created, which contributes to the improvement of the flow conditions of the passing exhaust gases, particularly when several catalyzer plates as seen in FIG. 2 are put together in a catalyzer assembly. In the case of a condensator assembly built in this manner, expansion chambers 5 appear again and again, over its entire length.
The oval configuration of the catalyzer 1 proves to be especially advantageous for mounting underneath the bottom of a motor vehicle or in its engine area.
DETAILED DESCRIPTION
In accordance with the process, the problem is solved by mixing together in dry powder form
REFERENCES:
patent: 3894968 (1975-07-01), Berger et al.
patent: 3907716 (1975-09-01), Haacke
patent: 3956189 (1976-05-01), Warshaw et al.
Berger Ulf-Michael
Berger Volker
Dubno Herbert
Shine W. J.
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