DE767989C - Device for carrying out catalytic conversions - Google Patents

Description

Device for carrying out catalytic conversions It is known catalytic reactions in which carbonaceous deposits form on the Form catalyst, which is removed by burning off with oxygen-containing gases have to be, e.g. B. in the splitting of hydrocarbon oils, thereby continuously to design that one works with powdery catalyst and the catalytic Implementation and resuscitation of the catalyst carried out in separate rooms. It is advisable here to carry out the reaction in such a way that what is to be converted Good z. B. hydrocarbon oil, in the vapor state in opposite motion leads to the catalyst. You can use your own, not publish Proposal to proceed so that extremely high catalyst concentration in the reaction chamber be maintained.

This can be done e.g. B. achieve that in a vertical The reaction chamber introduces the vaporous starting material from below, finely divided catalyst at the same time, evenly distributed from above, and only as much catalyst removed from the reaction space again, that + m reaction range is a ratio of starting material to catalyst z. B. from about 0.05 to 0.15 mol per kilogram of catalyst vvorhanden is.

'With such a teaching method, however, there is the Possibility of poor mixing of raw material and catalyst dust, which is due to the fact that the initially spread over the entire cross-section of the Combine evenly distributed flowing vapors in the reaction chamber to form larger substreams. This can be avoided by using the vertical relational space in several sub-spaces arranged one above the other and subdivided by attaching devices, z. B. sieve trays, at the bottom of each sub-space again for an even distribution of the fumes.

In order to make this mode of operation continuous, the catalyst must now be transported from one part of the room to the other. This could e.g. B. thereby screw conveyors or similar facilities happen. The movement of such conveyors But it hits a lot in the hot reaction space in the presence of catalyst dust great technical difficulties. In addition, in this way the catalyst not be removed evenly over the entire cross-section, so that always one Part of the catalyst dust is relatively unconsumed by the implementation space migrates while the other part stays too long in the reaction space.

It has now been found that a uniform promotion of the catalyst from one subspace to the other is achieved by the fact that the for the ascending Gases and vapors permeable intermediate floors or parts of these floors for emptying of the is ataRyzer dust that collects on them L sippable or 5 slide-like extendable. The floor should be z. B. laterally pulled out or still better opened by turning around an axis or by arranging several flaps downwards can be. In this way the catalytic converter can move from one compartment to the other fall from top to bottom against the rising vapors of the source material. You can operate these emptying devices at the same time. As particularly useful However, it has been found to apply them one after the other from bottom to top open and close again that the catalyst damming located on the lowest floor first discharged and the dust on the floors above only is then conveyed one level lower when the lower soil is already emptied.

By this measure it is achieved that only completely used, i. H. More laden with carbonaceous deposits and therefore largely ineffective become catalyst is discharged from the reaction chamber. The carried out Catalyst can be revitalized in a manner known per se and then the reaction space fed back in from above.

In the drawing, a reaction vessel according to the present invention is schematically shown Invention shown for example. The reaction vessel I has an extension at the top and is tapered at the bottom. The extension is at 8 by means of an entry device 2, shown here as a screw conveyor, the fine-grained Catalyst entered. After wandering through the reaction space it is through the Discharge device 3, also a screw, discharged at 9. At 1 this occurs The material to be converted enters the reaction chamber I in a vaporous state it in countercurrent to the catalyst and is pulled at 5 ah. after in ohereii enlarged space the entrained catalyst particles are largely deposited. The expansion of the real-world space can also be achieved by other separating or filtering devices be replaced. The actual reaction space is divided into sub-spaces by floors 7 The floors 7 consist of sieves, perforated sheets or similar distribution organs, which allow the vapors to pass through, well distributed, which the catalyst but hold on. To move the catalyst through the reaction space are the Floors 7 tiltable or rotatable about axes 6.

Claims (2)

P A T E N T A N S P R Ü C H E: 1. Device for performing catalytic Conversions in the gas phase with a dust-like catalyst moving from top to bottom and take part in the reaction flowing upwards, characterized in that the reaction space through intermediate floors that are permeable to the rising gases and vapors in one on top of the other Sub-spaces is divided and the floors or parts of these floors for emptying of the catalyst that collects on them can be tilted or pulled out are. 2. A method for operating the device according to claim I, characterized characterized in that the opening and closing of the floors in sequence from below is effected upwards.