DE754540C - Method and device for filling contact ovens for gasoline synthesis according to Fischer-Tropsch - Google Patents

Description

Method and device for filling contact furnaces for gasoline synthesis according to Fischer-Tropsch In the gasoline synthesis according to Fischer-Tropsch there is a cobalt-thorium contact used, which contains kieselguhr as a carrier substance. It has now been shown that the Filling the contact furnace with this mass unevenness in the performance of the Furnace occur. Methane-forming nests appear, and in the topmost contact layer carbon deposits occur.

When using powder contacts in gasoline synthesis were already observed certain disadvantages. It has therefore been proposed to use a nickel contact Bring in solid form by, for example, contact after drying wins at 110 or 2000 by sieving in pieces.

This shaping of the so-called green grain or the elimination the abrasion in the production of the green grain is therefore known and a part of the process of today's contact production after the Fischer-Tropsch gasoline synthesis. To the drying of the so-called green grain is accompanied by a reduction with hydrogen about 360 to 3800, whereby the strength of the contact grain, which is already present in lump form, is considerably reduced. Forget contact When activated by treatment with hydrogen, strength becomes stronger Strength is further reduced by the fact that the activation can only be done in small batches.

Furthermore, abrasion of the grain is caused by pouring it over the reduction batch container in the shipping bucket. By shipping on the train the abrasion increases again, which occurs again when pouring into the contact furnace increased, since the mass is there for the last time in motion.

According to the invention there is now a method for filling contact furnaces suggested by Fischer-Tropsch for the gasoline synthesis, in which the contact, in particular the cobalt thorium-Kontalit embedded in kieselguhr as a carrier substance, directly is dedusted when filling into the contact furnace.

For this purpose a device is used which consists of a through an inclined sieve divided into a passage chamber and a dust chamber consists.

Above all, the subject matter of the invention eliminates irregularities in the performance of the furnace in addition to those already mentioned in the introduction to the description Disadvantages avoided. In addition, there is also the performance of the contact is increased due to the non-existent dust content, as once an uneven Gas distribution on the individual contact elements is omitted and on the other hand the Contacts for the production of liquid hydrocarbons are much better suited.

Tests have shown that in dusty contact, the As a result of abrasion of granular material, the lattice structure of the effective Catalyst substances is destroyed. It should also be taken into account that afterwards, especially during the transport and the transferring of the transport containers the resulting amounts of dust are quite considerable. It is here in general by at least 5 01o.

The contact masses can be dedusted by sifting through the air. The dedusting through the interconnection of a dedusting sieve is particularly advantageous as shown in the drawing. This sieve is on a container attached, which is switched between the contact bucket and the furnace and the is divided into a passage chamber and a dust chamber.

Fig. I shows the container in longitudinal section and Fig. 2 in plan view.

The container I has an inlet opening 2 for filling the to dedusting contact mass, a passage chamber 3 for discharging the dedusted contact mass, a dust chamber, a drain connection 5 for the dust-free contact mass and a Outlet opening 6 which can be opened and closed by a slide 7.

This slide 7 is used to empty the dust chamber 4. The passage chamber 3 and the dust chamber 4 are separated by the inclined screen .S.

Claims (2)

PATENT CLAIMS: I. Method of filling contact furnaces for the Gasoline synthesis according to Fischer-Tropsch, characterized in that the contact, in particular the cobalt-thorium-Itontakt embedded in kieselguhr as a carrier substance directly is dedusted when filling into the contact furnace. 2. Apparatus for performing the method according to claim I, existing from one divided by an inclined screen into a passage chamber and a dust chamber Container. To differentiate the subject matter of the invention from the state of the art is the following publication has been considered in the granting procedure: fuel chemistry, Vol. 14 (1933), 5. 49.