DE283447C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- JV * 283447 CLASS 12 #. GROUP

FAUSTIN HLAVATI in VIENNA.

Addendum to patent 275343.

Patented in the German Empire on April 7, 1911. Longest duration: March 14, 1925.

In the method according to the main patent 275343 are to bind nitrogen to Hydrogen or oxygen contact substances used, the titanium in addition to one of the platinum group included metal. It has now been shown that this mass is the best Yield that provides the titanium and the platinum metal in the ratio of their atomic weights Metals, d. H. z. B. 48.1 parts by weight of titanium to 195.2 parts by weight of platinum, mixed. . The following were compared:

I. Contact mass, consisting of clay balls, on which platinum and titanium are metallically deposited where the ratio of platinum to titanium was such as 14 to 13;

II. Contact mass, consisting of pumice stone, deposited metallically on the platinum and titanium in the ratio of 45.6 titanium to 55.8 platinum.

. These two contact materials therefore did not contain platinum and titanium in an atomic weight ratio.

III. Contact mass, consisting of pumice stone with platinum and titanium in the ratio of the atomic weights, 195.2 platinum to 48.1 titanium.

IV. Contact mass, in which a specially produced, absorbable carbon is used as the carrier was used, which also contained platinum and titanium in the proportion of. Atomic weights.

At all temperatures and at any flow velocity of the gas, the amounts of ammonia obtained from contact mass III and IV were always greater than the amount of ammonia from contact mass I and II. The difference was at high temperatures (over 300 °) in ammonia synthesis not as great as at medium temperatures. Consequently was a series of tests at the optimum determined by the preliminary tests the temperature, the gas pressure and the flow rate made and resulted in detail the following results:

From each 20 l of gas mixture, the contact mass I (clay balls with platinum and titanium in almost equal amounts) gave 0.9 and 0.6 ecm V ₁₀₀ normal ammonia.

The contact mass II yielded 14.8, 13.5, i2, o, 14.2 and 9.5 ecm from each of 20 l of gas mixture Vioo normal ammonia.

Contact materials III and IV, which contained platinum and titanium in an atomic weight ratio, were approximately equivalent. They gave 27.1, 16.7, 19.5, 27.4, 24.9, 26.4, 20.3, 21.2 and 17.0 ecm ¹ Z ₁₀₀ normal ammonia.

The difference in these results when using contact materials III and IV is based on the different grain size of the individual contact masses and on

the duration and level of the temperature during annealing of the contact masses.

The mean value from the experiments is for every 20 liters of gas mixture

with contact mass I (clay balls) 0.75 ecm ¹ Z ₁₀₀ normal ammonia,

II (pumice stone, 56 platinum to 46 titanium) 12.8

III and IV (platinum and titanium in atomic weight ratio) 22.3

7:

100

100

From this it follows that with the contact mass mixed in the ίο atomic weight ratio almost double the yield is achieved as with a contact mass containing platinum and Contains titanium in approximately the same amount.

Claims (1)

Patent claim: Process for the synthetic production of ammonia from the elements according to the patents 275343 and 277054 with the help of contact substances, addition to the patent 275343, characterized in that the Titanium and the platinum group metal are mixed in a weight ratio which corresponds to the ratio of the atomic weights. BERMN. GKDItUCKl ¹ IN IJKIi UKICHsrjltUCKKRKL