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Demetallization recovery method of spent catalytic cracking catalyst

A catalytic cracking and demetallization technology, applied in the direction of catalytic cracking, catalyst regeneration/reactivation, physical/chemical process catalysts, etc., can solve the problems of complex process, limited application, high cost of resurrection, etc., and achieve short resurrection time, which is beneficial to industry The effect of production and improvement of resurrection efficiency

Active Publication Date: 2022-07-19
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0003] At present, the methods of demetallization and revival of spent catalytic cracking catalysts reported at home and abroad mainly include pickling, carbonylation-chlorination, sulfuration-oxidation, and magnetic separation. These revival methods are usually complex in process and high in revival costs. greatly limit its application

Method used

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  • Demetallization recovery method of spent catalytic cracking catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1-7、 comparative example 1

[0041] (1) 10g spent catalytic cracking catalyst is put into crucible, and is roasted in microwave muffle furnace according to the condition shown in table 1;

[0042] (2) putting the product of step (1) into a container, adding the aqueous solution of the organic phosphonic acid compound under stirring conditions according to the conditions shown in Table 1 to carry out contact treatment;

[0043] (3) the product of step (2) is cooled to room temperature, suction filtered, washed with deionized water to neutrality (pH=7), and dried in a blast drying oven according to the conditions shown in Table 1, to obtain revival catalytic cracking catalyst.

[0044] (4) The Ni removal rate, the V removal rate and the micro-reactive activity of the revived catalytic cracking catalyst were measured respectively, and the results are shown in Table 2.

[0045] Table 1

[0046]

[0047] Table 2

[0048] Example number Ni removal rate (%) V removal rate (%) Micro-reactive ...

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Abstract

The invention relates to the field of waste catalyst treatment, and discloses a method for demetallization and resurrection of waste catalytic cracking catalyst. The method comprises: contacting the spent catalytic cracking catalyst with an aqueous solution containing an organic phosphonic acid compound, and then performing solid-liquid separation, and washing and drying the solid phase obtained by the solid-liquid separation to obtain a revived catalytic cracking catalyst. The method of the invention has high metal removal rate, high micro-reactivity of the revived catalyst obtained, and simple and convenient operation.

Description

technical field [0001] The invention relates to the field of waste catalyst treatment, in particular to a method for demetallization and resurrection of waste catalytic cracking catalysts. Background technique [0002] In recent years, the general heavier and inferior quality of crude oil has made residual oil catalytic cracking play an increasingly important role in the refining industry. The residual oil contains high levels of heavy metals such as Fe, Ni and V and other harmful substances. In order to maintain the high conversion rate and selectivity of the heavy oil catalytic cracking unit, the refinery generally adopts the method of unloading the spent catalytic cracking catalyst and replenishing the fresh agent. way. At present, spent catalytic cracking catalysts (FCC catalysts) have been defined as hazardous wastes by the newly promulgated "National Hazardous Waste List", and the supervision of their recycling and disposal is more stringent. If the spent catalytic c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/62C10G11/02
CPCB01J38/62C10G11/02
Inventor 于金海史建公任靖
Owner CHINA PETROLEUM & CHEM CORP
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