Asphalt modifier based on petrochemical industrial waste catalyst and preparation method

Abstract

The invention discloses an asphalt modifier based on a petrochemical industrial waste catalyst and a preparation method. The asphalt modifier is prepared from an asphalt mixture, mineral powder and anFCC waste catalyst, and has the advantages that the implementation is simple, and the FCC waste catalyst is comprehensively used for an asphalt mixture, so that the 100% utilization of the FCC wastecatalyst is realized. The FCC waste catalyst is porous and large in specific surface area, so that the water stability and high-temperature stability of the asphalt mixture can be improved, and the pavement performance is improved. Meanwhile, the asphalt is used for a lower surface layer or a middle surface layer of a pavement, and the asphalt is used for wrapping the waste catalyst, so that the safety risk of heavy metal seepage can be effectively avoided.

Description

technical field [0001] The invention relates to an asphalt modifier based on petrochemical industry waste catalyst and a preparation method. Background technique [0002] As of the end of 2016, the annual production of FCC (Fluid Catalytic Cracking) spent catalysts in my country has reached 100,000 tons, and FCC spent catalysts have been included in the national hazardous waste list, which will definitely increase the treatment cost of FCC spent catalysts. The FCC catalyst is made by beating alumina sol, pseudo-boehmite, silica sol and adhesive (clay) with acid to obtain slurry, spray drying, and then ion exchange, loaded with rare earth RE 2 o 3 Ionic, fluidized catalyst prepared by calcination. FCC catalysts are composed of zeolites (molecular sieves) based on Al 2 o 3 and SiO 2 It is a crystalline silicon-aluminum salt with a lattice structure as the main component, and has a large specific surface area and pore volume. Although the spent FCC catalyst has lost i...

AI Technical Summary

Problems solved by technology

The physical separation method mainly uses the magnetic separation method, and a small number of catalysts with short cycle time, light pollution (low magnetic agent), good performance, and continued use are screened out by physical methods. However, those catalysts that have been significantly deactivated can only be used traditional method

[0003] At present, the main way to deal with spent FCC catalysts is to regenerate them. The method is to process them through chemical regeneration and magnetic separation technology to make the spent catalysts active again and participate in the catalytic reaction of the petrochemical industry again. However, the recycling rate of this method is relatively low. Low, generally between 20% and 50%

In addition, researchers have used Al, Si and other elements in FCC waste catalysts to mix them into cement production. Although the recycling rate is 100%, for cement production lines, the daily output of FCC waste catalysts is very small, and The change of raw materials will inevitably require the adjustment of the production parameters of the cement production line, which will cause difficulties in actual production and restrict the large-scale utilization of FCC spent catalysts

As an adsorbent, FCC waste catalyst can be used for water deacidification by taking advantage of its porous properties, but there will be a safety risk of heavy metal leaching

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