Method for preparation of faujasite from oil shale residue

Abstract

The invention relates to a method for preparation of faujasite from oil shale residue. The method comprises the steps of: subjecting the semi-coke generated by pyrolysis of oil shale at 300-700DEG C to combustion in an industrial boiler like circulating fluidized bed and the like or directly subjecting oil shale to combustion in an industrial boiler like a fixed bed or circulating fluidized bed and the like, and taking the generated oil shale residue as the raw material, taking oil shale residue below 200 meshes, fully grinding and mixing the oil shale residue with alkali in a mass ratio of 1: 0.8-1:1.5 evenly, then calcining the mixture at 550-700DEG C for 0.5-2h, letting the calcined object cool naturally to room temperature, then performing grinding, adding distilled water according to a liquid-solid ratio of 3:1-7:1 (ml / g), fully stirring the substances at room temperature for 3-24h, conducting sealing and carrying out crystallization at 60-110DEG C for 6-48h, washing the crystallization product with distilled water until the pH value of the washing liquid reaches 7-8, and performing drying so as to obtain a faujasite product. The method for synthesis of faujasite has the advantages of simple process, low cost and good repeatability, and the prepared faujasite has perfect crystal form and good crystallinity, thus providing a new way for high grade resource utilization of oil shale residue.

Description

technical field [0001] The invention belongs to the technical field of oil shale slag, a by-product of the oil shale production industry, and specifically relates to a method for preparing faujasite from oil shale slag. Background technique [0002] With the decreasing reserves of conventional energy such as coal and oil, more and more attention has been paid to unconventional energy such as oil shale and shale gas. Oil shale is a combustible organic rock with high ash content formed by the simultaneous deposition of fine-grained mineral debris and organic matter decomposed by lower animal and plant residues. It is mainly used for dry distillation to extract shale oil or direct combustion for power generation. The oil shale slag produced by burning the semi-coke of oil shale pyrolyzed at 300-700°C in industrial boilers or directly burning oil shale in industrial boilers accounts for more than 60% of the total oil shale. Oil shale slag not only occupies a large amount of lan...

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Problems solved by technology

At present, the main utilization methods of oil shale slag are: 1) preparation of building materials, such as cement, ceramsite, lightweight brick, glass, etc.; 2) preparation of fine chemical materials, such as extraction of white carbon black, extraction of oxides, as Filling agent for plastics and rubber; in addition, it can also be used as agricultural fertilizer and soil improver; many of the above-mentioned utilization methods have limited utilization and low added value. In order to realize the sustainable utilization of oil shale resources, it is necessary to seek a path with high added value , Utilization of oil shale slag with a wide range of applications

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