DE1642999A1 - Copper catalyst and process for its manufacture - Google Patents

Description

Eupfer catalyst and process for its production The erfindugn relates to a copper catalyst and a process for its manufacture.

It is known that copper catalysts are used selectively in gas mixtures to bind the oxygen. The copper compounds that can be used for these purposes are applied in different ways to the preventively inert carrier.

So it is z. B. known to precipitate copper hydroxide from solutions, causing it to settle on the carrier.

It is also known to make copper compounds and carriers together To fail solutions of both. It is also known to have copper nitrate on the supports to decompose. Active compounds so prepared have e.g. B. at 1500 C a maximum Capacity of 4 ltr. Oxygen per liter Eatalyst, measured dynamically as The final value for the measurement was taken to be <1 ppm ° 2 in the final gas.

With none of the known carriers one could be stable in oneself Catalyst obtained. Rather, you had to use the dried or undried catalyst mass stabilize, including waterglass and tableting aids of various kinds served.

However, all of these additives affected the activity of the catalyst unfavorable.

The catalyst of the invention has the advantage that it can be tabletted into an abrasion-resistant body without additives of any kind and also the best known catalyst more than doubles in effectiveness exceeds, but is oxygen uptake of one liter of the catalyst of the invention under the conditions of the above example more than 8 1.

All of these advantages are evident in the catalyst of the invention Use of a carrier made of g-stabilized aluminum oxide and / or aluminum silicate achieved. The copper is deposited reductively on this carrier by adding a copper saline solution in which the carrier is suspended is reduced Smaller ones Sets of compounds of the elements of the 1st, 2nd, 4th, 6th, 7th and 8th groups of the periodic The system is added before or after the precipitation, individually or as a mixture, increase the Recording capacity further. The elements zinc, chromium, manganese, nickel and the precious metals take a preferred place here.

The catalyst can be reduced by heating to 1500 - 1600 C Atmosphere can be regenerated.

Exemplary embodiment 52 kg of copper sulfate are dissolved in 200 l of water. 0.6 kg of nangan sulfate are added as an additional activator. As a reducing agent serve 23 kg of dextrose. In this solution, 31.5 kg of activated stabilized Aluminum oxide suspended. The suspension is heated to the boil and the copper reduced by adding 30 1 50% sodium hydroxide solution.

Claims (3)

claims: 1. Copper catalyst, characterized by a Carrier made of g-stabilized aluminum oxide and / or aluminum silicates. 2. Process for the production of a copper catalyst according to claim 1, characterized in that the copper in a Eupfersalzlösung in which the Carrier is suspended, is reduced. 3. The method according to claim 2, characterized in that the solution still small amounts of soluble compounds of elements of the 1st, 2nd,., 6th, 7th and or 8. Group of the periodic table, especially zinc, chromium, manganese, or nickel Precious metals are added individually or in a mixture.