Method for preparing dehydrogenation catalyst

Abstract

The invention relates to a method for preparing a dehydrogenation catalyst, which comprises the following steps of: (a) measuring the content of specific components of rare earth containing cerium oxide; (b) adding iron oxide and / or an iron oxide precursor, potassium oxide and / or a potassium oxide precursor, a silicate calcium salt and a pore-forming material into the rare earth, and mixing the materials to form a mixture; (c) mixing the mixture with a proper amount of water, kneading the mixture sufficiently, and extruding the mixture into bars to obtain preforms; and (d) drying and calcinating the preforms to obtain the finished product of the dehydrogenation catalyst, wherein the specific components to be measured in the step (a) comprise the cerium oxide in the rare earth and the compounds which are the same as the materials added in the step (b). The method for preparing the dehydrogenation catalyst has the advantages of no pollution and low cost.

Description

technical field

[0001] The invention belongs to the field of dehydrogenation catalysts, in particular to the field of cerium-containing alkyl aromatic hydrocarbon dehydrogenation catalysts. Background technique

[0002] In the field of alkylaromatic dehydrogenation catalysts, the improvement of conversion rate and dehydrogenation selectivity mainly depends on the selection of dehydrogenation catalysts. Traditional dehydrogenation catalysts mainly include two series of dehydrogenation catalysts containing chromium and cerium. However, since chromium is a carcinogen, it will cause environmental pollution and is greatly restricted in industrial production. The main object of research and production.

[0003] The process of preparing a dehydrogenation catalyst containing cerium oxide in the prior art is to mix cerium nitrate with compounds of elements such as iron, potassium, molybdenum, and some additives, and then obtain a finished dehydrogenation catalyst after kneading, cal...