Catalyst successive impregnation equipment and method

Abstract

The invention relates to catalyst successive impregnation equipment and a method. The catalyst successive impregnation equipment comprises a carrier continuous feeding system (1), an impregnation liquid conveying system (2), an impregnation chamber (3), a conveying part (4), a dryer (9) and a power system; the carrier continuous feeding system (1) and the impregnation liquid conveying system (2) are open in the impregnation chamber (3); the bottom of the impregnation chamber (3) is open at the initial end of the conveying part (4); the conveying part (4) is positioned between the impregnation chamber (3) and the dryer (9); an outlet at the tail end of the conveying part (4) is communicated with the dryer (9); and power is provided for the operation of the conveying part (4) by the power system. The invention also discloses the method applying the equipment. The catalyst successive impregnation equipment and the method which are provided by the invention can be used for carrying out catalyst carrier impregnation to prepare a catalyst; a catalyst carrier is continuously impregnated; the impregnation efficiency is high; the impregnation uniformity is good; and the catalyst carrier is crushed a little.

Description

technical field [0001] The present invention relates to a kind of equipment and method for preparing catalyst, more specifically, to an impregnating equipment and method for impregnating catalytically active components on catalyst carrier. technical background [0002] In the catalyst preparation process, impregnation is a very important process step, that is, the catalytic active component is impregnated on the catalyst carrier, so that the catalytic active component is uniformly dispersed on the carrier, and then dried and roasted to prepare a catalyst product. For example, the three-way catalyst used for automobile exhaust purification is to impregnate the metal salts of active metal components such as Pd, Pt, and Rh on the catalyst carrier through an impregnation process; The metal salt is impregnated on the catalyst support. [0003] In the current catalyst preparation process, the impregnation process mainly adopts a batch reactor method. The prepared catalyst carrier...

AI Technical Summary

Problems solved by technology

However, this impregnation method also requires the catalyst to be soaked in the impregnation solution; for some catalysts, after the catalyst carrier is formed, due to the lack of roasting or low roasting temperature, the strength is very low, and the soaking time in the impregnation solution is too long. Hydrolysis occurs, even if some carriers are not completely disintegrated, but some carriers become loose after soaking, and are easily broken in the post-treatment process, which will significantly reduce the catalyst yield

Similarly, for the fine particle catalyst carrier that is easy to hydrolyze, a large amount of hydrolysis will occur after impregnation, the content of fine powder will increase, and the difficulty of filtration will increase.

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