DE903131C - Process for the catalytic cracking of hydrocarbon oils - Google Patents

Description

Process for the catalytic cracking of hydrocarbon oils Im Patent 739 510, is a process for the splitting of carbon, hydrogen oils in the presence Described catalysts containing silica gel, using catalysts by creating a silica gel from a waterglass solution and mixing of the gel while still moist with a metal salt solution while at the same time or a subsequent addition of a precipitant for the 2-metal salt produced became.

One obtains z. B. from a water glass solution by adding an acid a silica gel. This is in a still moist state, i. H. as a jelly, with the solution of one or more salts of the metals of a. to B. Group of the Periodic Systems, in particular the earth metals, titanium, tin, zinc, @ -NTagnesium or the metals of the 5th, 6th or iron group mixed. Simultaneously or after mixing the gel with the salt solution is a precipitant for glass metal salt, for. B. ammonia, ammonium carbonate, ammonium sulfide or alkali, too.

According to the patent 849 157 one can use suitable for the same purpose Catalysts by mixing solutions of one or more salts of the earth metals, of titanium, tin, zinc, ivagnesium, the metals of the 5th, 6th or iron group with one generated from a waterglass solution still wet gel (Jelly) and heating the mixed product obtained.

It has now been found that in the cleavage of hydrocarbon oils it is particularly advantageous to use the catalysts mentioned in Patent 739 510 and in Patent 849 1.97 after the added metals have been partially leached out of them.

The partial dissolution of the metal from the moist or dried metal-containing gel is done with the help of suitable acids, e.g. B. hydrochloric acid, sulfuric acid, Nitric acid or an organic acid. The gel obtained is then, expedient by washing, freed from acid, dried and then brought into suitable form.

Starting materials for the cleavage of which the catalysts prepared in this way are used with particular advantage are, for. B. crude oils, tars, products of the pressure hydrogenation of coal, tars or mineral oils or oils obtained synthetically from carbon monoxide and hydrogen. Example i Part by weight of soda waterglass containing 0.28 parts by weight of silica is dissolved in 9 parts by weight of water and silica gel precipitated therefrom with 0.23 parts by weight of ammonium chloride in 1.5 parts by weight of water. To this, with stirring, 0.28 parts by weight of aluminum nitrate (A1 (; N 03) 3 # 9H20), dissolved in 1.5 parts by weight of water, and concentrated ammonia water are added until an alkaline reaction is achieved. The whole thing is boiled, then filtered and the precipitate washed with hot water, dried at 2oo ° and crushed. The mass is then treated with 300% acetic acid at 85 ° until no more aluminum goes into solution, then washed with water, dried, shaped and heated to 50 ° for 2 hours.

If you pass the vapors of a paraffinic base over this catalyst Medium oil, a product is obtained that contains about 40% petrol.

Claims (1)

PATENT CLAIM: Process according to patent 739 510 and patent 849 1 57 for the catalytic cleavage of hydrocarbon oils in the presence of catalysts which are produced by generating a silica gel from a water glass solution and mixing the gel while it is still moist with a metal salt solution and using a precipitant for the metal salt, characterized in that the added metals were partially dissolved out of the catalysts to be used.