FCC kaolin preparation method

Abstract

The invention discloses an FCC kaolin preparation method. When kaolin is subjected to acid liquor mixing, a stirring device comprising a flexible part is used, a stirring rod in the stirring device is arranged in a multi-layer structure and is rotationally arranged on a stirring main shaft in a hinged mode, and a spring and a telescopic cylinder structure are arranged at the hinged position; the stirring rods on the same layer can be uniformly stressed, the stirring condition of a stirring barrel in the horizontal direction can be balanced, meanwhile, the flexible part structures are arranged between the stirring rods on different layers, the stirring condition of the stirring barrel in the vertical direction can be balanced, and meanwhile, a spherical air injection part is arranged in the stirring rod and can inject air in acid liquor to further enhance the stirring effect, further, the spherical air injection part is connected with the flexible part and can adapt to bending of the flexible part to change the air injection direction, and the stirring effect can be further enhanced.

Description

technical field [0001] The invention relates to the field of processing non-metallic ores, in particular to a method for preparing FCC kaolin. Background technique [0002] Kaolin is the most commonly used filling component in semi-synthetic catalytic cracking (FCC) catalysts. In addition to acting as a catalyst matrix, it can also provide active centers and reaction sites for the cracking of some macromolecules. Its surface area and pore volume are very small, the number of active centers is very small, and the ability to crack macromolecules is limited. For this, many preparation methods of modified kaolin have appeared in the prior art, such as patent document 1 which discloses a kaolin The modified method is to react the calcined kaolin with acid, and then the pores of the kaolin obtained after filtration are concentrated in the range of 50-200 angstroms, which can be used as a component of hydrocarbon conversion, especially catalytic cracking catalyst, but its It is on...

AI Technical Summary

Problems solved by technology

[0007] To sum up, in the prior art, in the preparation method of FCC kaolin, there is no process for fully and uniformly mixing reaction of kaolin and acid solution, let alone a mixing device for this process, and the existing mixing In the device, the mechanism is complicated, and the work between the rotating blades is independent of each other. It does not take into account that the space between the two rotating blades also needs to be stirred. At the same time, if the solid-liquid ratio of each part in the entire stirring container Inhomogeneous, there will be over-stirring and under-stirring between the rotating blades. Therefore, the present invention provides a method that can quickly, uniformly, and dynamically mix kaolin and acid to improve the overall molding performance of modified kaolin. A kind of FCC kaolin preparation method

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