The method for the catalytic tubes

 

(57) Abstract:

Usage: in catalytic chemistry, in particular the methods of obtaining items catalytic reactors in which the catalyst form a layer, tightly associated with the wall of the reactor. The invention is: to enhance the catalytic activity of the catalyst in the process for catalytic pipe provides for the introduction into the pipe charge of condensed explosives, filling the coaxial gap between the pipe wall and charge the catalyst and loading it inside the pipe by the detonation wave. 1 Il.

The invention relates to the production of elements of catalytic reactors in which the catalyst form a layer, tightly associated with the reactor wall, and have a high catalytic activity.

A method of obtaining catalysts with increased activity by activating the catalytic mass in a cylindrical steel container and loading the detonation wave external explosive charge (CC) [1]

The disadvantage of this method is the difficulty of forming objetych catalytic systems and the necessity of their use in granular form in implemented and what of the catalytic tubes, namely, that on the walls of the carrier, made in the form of a pipe, put a layer of catalyst [2]

The disadvantage of this method is a small increase in the activity of the applied catalyst.

The purpose of the invention to provide a catalytic tubes with wall layer of activated contact.

The purpose of the invention to simplify the technology of catalytic tubes with wall layer of activated catalyst.

This objective is achieved in that the inside of the tube is placed a charge of condensed explosives, fill coaxial gap between the pipe walls and the catalyst charge and load it inside the tube detonation wave.

The method can be carried out using the setup shown in the drawing.

Inside the tube 1 along the axis of the placed charge of condensed explosives (he) made in the form of an elongated cylinder. The lower tube is closed by a stopper 3, made for example of foam. The explosive charge is fixed in the hole on the axis of the tube. Sizes, secure the strength in the tube and the charge in the tube are selected in such a way as to prevent mutual mechanical displacements of structural elements in REC powder catalyst 4. The tube is closed by a stopper 5. Requirements for the tube 5 are the same as for the tube 3. The upper end of the charge 2 must rise above the tube 5 by an amount sufficient for the comfortable connection of the detonator 6. Design mounted on a solid metal plate 7.

The method is as follows.

A General method of immersion catalysts.

Is undermining the detonator 6, which causes detonation of the charge 2. When detonation in the catalyst layer 4, a pressure wave, leading to intensive compaction and heating of the powder catalyst and, as a consequence, the solid deposition of powder on the inner surface of the tube. End of the tube 3 and 5 under the action of the dispersion products of detonation of the charge 2 is destroyed.

The ratio of the inner diameter of the tube and the outer diameter of the charge is selected from the conditions of obtaining the desired thickness of coating. The diameter of the charge must not be less critical for this type of explosive, to ensure a stable detonation.

General test method of catalytic activity.

Test the catalytic activity was carried out on the installation of a pulse-type comparison of activity e is known conditions and activity taken from the surface of the tube objetych catalysts in reactions initiated by chlorine (1% Cl2, 300about(C) dehydrochlorinating 1,2-dichloroethane (EDC) and oxidation of ethylene with oxygen (1% O2in ethylene, 300aboutC).

P R I m e R 1. Inside the tube 1 along the axis is placed a charge of condensed EXPLOSIVES on the basis of Ten pentaerythritoltetranitrate C(CH2ONO2)4made in the form of an elongated cylinder with a diameter of 5 mm Lower orifice tube fixed tube 3 made of foam. The explosive charge 2 is fixed in the hole on the axis of the tube. In the space between the inner tube and the outer surface of the charge pour the powder of Al2O34. The tube is closed by a stopper 5. The thickness of the tubes 3 and 5 and 3.5-7 mm Tube made from steel material 3 with an inner diameter of 18 mm and a wall thickness of 4 mm, tube length 100 mm Produce undermining the detonator 6, causing the detonation of the charge 2.

Compression gives a uniform porous coating thickness of 2 mm.

The specific surface of the catalyst (Sbeats) 13-15 m2/,

The activity in the reaction of dehydrocorydaline EDC (conversion)/Sbeatsneobiota Al2O3(reference 1) 0,350%/m2, compressed in a known conditions (reference 2) 0,360%/m2, compressed in the described way 0,361%/ m2.

P R I m m e R 2. The experimental is the neigh 1% of the recovered silver.

Compression gives a uniform coating thickness of 1.93 mm

Sbeatscatalyst 15-17 m2/year of Activity in the reaction of dehydrocorydaline EDC (conversion)/SbeatsStandard 1 0,450%/m2Standard 2 0,465%/m2Compressed catalyst 0,470%/m2< / BR>
Activity standard 1 in the oxidation reaction of ethylene is missing. Activity standard 2 (conversion of O2)/Sbeats0,318%/m2Activity compressed catalyst N 0,320%/m2< / BR>
P R I m e R 3. The experiment was performed under conditions similar to example 1. As the catalyst used Al2O3containing 2% of the recovered silver.

Compression gives a uniform coating thickness 1,91 mm, catalyst 14-16 m2/,

Activity in the reactions of dehydrocorydaline EDC (conversion)/SbeatsStandard 1 0,510%/m2Standard 2 0,529%/m2Compressed catalyst 0,530%/m2< / BR>
Activity standard 1 in the oxidation reaction of ethylene is not present, the activity of benchmark 2 (conversion of O2)/Sbeats0,525%/m2,

Activity compressed catalyst 0,550%/m2.

Compared with the method described in [2] the inventive method is based on available raw materials, does not require complicated apparatus registration means is activated contact systems on the walls of the elements of the catalytic reactors.

The method for the CATALYTIC TUBES by drawing on a wall of the carrier, made in the form of a pipe, a catalyst layer, characterized in that applying a catalyst layer inside the pipe is placed with a gap charge of condensed explosives, fill coaxial gap between the pipe walls and the catalyst charge and load it inside the pipe by the detonation wave.

 

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