DE603731C - Process for the production of highly active contact masses - Google Patents

Description

■ Bihlioflisdk
kn \ Ind. liigesidom

20 NOV.

1934

ISSUED ON OCTOBER 8, 1934

REICH PATENT OFFICE

PATENT LETTERING

CLASS 12 g GROUP 4 oi

35. 30 Date of publication of the patent grant: September 20, 1934

Dr. Hans Harter in Würzburg

Process for the production of highly active contact masses

Patented in the German Empire on November 13, 1928

The patent 564432 relates to a method for the production of highly active contact masses, after, from metals or theirs Compounds or from alloys or from a mixture of the above three components with or catalysts produced without the addition of activators are melted and with easily decomposable metal compounds are brought together under such circumstances, that the catalysts are quenched and converted into porous pieces and with those resulting from the decomposition of the decomposable metal compounds Metals or metal compounds are coated. For this purpose, the catalyst melt poured in a thin stream into the easily decomposable compounds. The easily decomposable compounds compounds which cannot be decomposed or are difficult to decompose can be added. The mentioned Compounds whose decomposition products either have catalytic activity or only serve to activate the molten contact masses, both succeed in the solid and liquid as well as in the gaseous or vaporous state or in the form of their solutions for use.

According to the present invention, in place of such easily decomposable compounds or instead of their mixtures with non-decomposable or difficult-to-decompose compounds exclusively non-decomposable or difficult to decompose compounds with the properties mentioned used, especially the cyanides or double cyanides of metals (iron, aluminum etc.) and of alkalis and alkaline earths. Under such circumstances arises according to the new procedure, a catalytically active, porous base body according to the composition the contact melt on which the compound mentioned is deposited in fine distribution. As quenching fluids Both aqueous solutions and anhydrous solutions or suspensions are suitable.

example 1

A contact melt, consisting of iron and iron oxide with a small addition of aluminum oxide, is poured into a solution of potassium ferricyanide, being porous Pieces of the composition of the base melt arise, which one finely distributed coating of the. have the above compounds.

Example 2

86 parts of fine iron powder are mixed with 8.2 parts of ammonium molybdate and 5 parts Thorium oxide, to which 1.6 parts of aluminum and 1.5 parts of metallic calcium are added are intimately mixed and melted in an electric furnace. The above melt is in a suspension of iron, aluminum and potassium cyanide poured into water and

frightened. The very porous contact bodies obtained are dried and dried possibly still subject to a slight ■ reduction.

Claims (2)

Patent claims: i. Process for the production of highly active contact compounds, characterized in that that of metals, metal compounds or alloys or their compounds. mix produced catalysts melted and into metal compounds or solutions or suspensions of such substances that are difficult to decompose or not decompose poured in 'and quenched. 2. The method according to claim 1, characterized in that as difficult or not decomposable compounds cyanides and double cyanides of metals, especially heavy metals and aluminum and alkalis and alkaline earths.