A kind of high temperature resistant foamed ceramics prepared by FCC waste catalyst and preparation method thereof

Abstract

The invention belongs to the technical field of inorganic fire-resistant and heat-insulating materials, and in particular relates to a high-temperature-resistant foamed ceramic prepared from FCC waste catalyst, which is prepared from the following raw materials in parts by mass: 18-50 parts of FCC waste catalyst; Al 2 o 3 Powder 22~40 parts; SiO 2 0-10 parts of powder; 5-8 parts of coagulant; 9-12 parts of binder; 0.8-1.2 parts of dispersant; 5-15 parts of reinforcement; 1-2 parts of foaming agent; 2-3 parts of foam stabilizer ; 15-20 parts of water and a pH regulator. The present invention uses FCC waste catalyst, Al 2 o 3 Powder and SiO 2 The powder is the ceramic base material, and the ratio is optimized. The high-temperature-resistant foam ceramics obtained have a higher service temperature and a lower thermal conductivity, and realize efficient recycling and reuse of FCC spent catalysts.

Description

technical field [0001] The invention belongs to the technical field of inorganic fire-resistant and heat-insulating materials, and in particular relates to a high-temperature-resistant foamed ceramic prepared from FCC waste catalyst and a preparation method thereof. Background technique [0002] Catalytic cracking (FCC) is an important part of modern petroleum refining process. The FCC process is a process of cracking heavy raw materials at a certain temperature and under the action of a catalyst. It is the main method of lightening heavy oil. During the operation of the FCC unit, the high temperature and the poisoning effect of heavy metals lead to the reduction of catalyst activity and cannot meet the requirements of catalytic cracking reaction. In order to maintain a certain activity of the catalyst in the FCC unit, it is necessary to regularly replenish fresh catalyst and remove some deactivated catalyst from the regenerator, so waste FCC catalyst will continue to be pro...

AI Technical Summary

Problems solved by technology

The more catalyst particles contaminated with heavy metals, the stronger their magnetic susceptibility, which makes it possible to separate and recycle spent catalysts by magnetic separation; Catalysts that are light (low magnetic agent), good performance, and can still be used can only be treated by traditional methods for those catalysts that have been significantly deactivated, so the problem of disposal of spent catalysts cannot be fundamentally solved, and only reduced Production of spent FCC catalysts, no recycling of spent catalysts

The chemical method is mainly the chemical revival method of spent FCC catalysts. The spent catalysts are mixed and soaked with specific chemical reagents to remove heavy metals such as Ni and V on the spent catalysts, restore part of the specific surface area and pore volume of the catalysts, and then reuse them. to the catalytic cracking unit; however, the chemical method requires the use of a large amount of chemical reagents, and causes a certain amount of chemical pollution, and can only restore part of the catalytic performance of the catalyst, and the recovery and reuse effect is limited

Images