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Method for resuscitating spent catalytic cracking catalyst through having hybrid reaction with SiCl4

A catalytic cracking and waste catalyst technology, applied in the field of solid waste treatment and application, can solve the problems of difficult to achieve ideal effect, low heavy metal removal rate, complicated process steps, etc., and achieve good activity stability, low heavy metal content, The simple effect of the resurrection method

Inactive Publication Date: 2015-08-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the above-mentioned resurrection methods for spent FCC catalysts have complicated process steps and cumbersome operation. Although some methods are relatively simple, it is difficult to achieve the desired effect, especially the removal rate of heavy metals is low.

Method used

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  • Method for resuscitating spent catalytic cracking catalyst through having hybrid reaction with SiCl4
  • Method for resuscitating spent catalytic cracking catalyst through having hybrid reaction with SiCl4
  • Method for resuscitating spent catalytic cracking catalyst through having hybrid reaction with SiCl4

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Effect test

Embodiment 1

[0029] Embodiment 1: with the catalytic cracking waste catalyst material of roasting treatment, (this catalytic cracking waste catalyst material physical and chemical performance parameter such as figure 1 Shown), (material temperature 400 ℃), carry out mixed reaction with gaseous SiCl4, the mass ratio of SiCl4 and catalytic cracking waste catalyst material dry basis is 0.25: 1, and the reaction time is 10 minutes. The reacted catalyst sample was washed and filtered with 10 times deionized water, then the catalyst was mixed with the oxalic acid solution and stirred for 1 hour, the pH value of the solution was controlled to be 3.0, and the solution temperature was maintained at 90°C. After acid-washing the catalyst sample, the amount of deionized water used is 10 times the mass of the catalyst on a dry basis, and then the catalyst sample is dried after filtration. The drying temperature is 200 ° C, and the drying time is 2 hours. The catalyst sample is designated as sample 1. ...

Embodiment 2

[0030] Embodiment 2: the catalytic cracking waste catalyst material through roasting treatment, (the physical and chemical properties of this catalytic cracking waste catalyst material is the same as embodiment 1), (material temperature 350 ℃) and gas phase SiCl 4 For mixed reactions, SiCl 4 The mass ratio to the dry basis of catalytic cracking waste catalyst material is 0.35:1, and the reaction time is 20 minutes. The reacted catalyst sample was washed and filtered with 10 times deionized water, and then the catalyst was mixed and stirred with the citric acid solution for 1.5 hours, the pH value of the solution was controlled to be 3.5, and the solution temperature was maintained at 95°C. After acid-washing the catalyst sample, the amount of deionized water used is 9 times the mass of the catalyst on a dry basis, and then the catalyst sample is dried after filtration. The drying temperature is 250 ° C, and the drying time is 1.5 hours. The catalyst sample is designated as sa...

Embodiment 3

[0031]Embodiment 3: the catalytic cracking waste catalyst material through roasting treatment, (the physical and chemical properties of this catalytic cracking waste catalyst material is the same as embodiment 1), (material temperature 250 ℃) and gas phase SiCl 4 For mixed reactions, SiCl 4 The mass ratio to the dry basis of catalytic cracking waste catalyst material is 0.15:1, and the reaction time is 40 minutes. The reacted catalyst sample was washed and filtered with 8 times deionized water, and then the catalyst and tartaric acid solution were mixed and stirred for 3 hours, the pH value of the solution was controlled to be 5.0, and the solution temperature was maintained at 60°C. After acid-washing the catalyst sample, the amount of deionized water used is 7 times the mass of the catalyst on a dry basis, and then the catalyst sample is dried after filtration. The drying temperature is 150 ° C, and the drying time is 3 hours. The catalyst sample is designated as sample 3. ...

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Abstract

The invention discloses a method for resuscitating spent catalytic cracking catalyst through having hybrid reaction with SiCl4 and relates to the solid waste processing and application field. The resuscitating method includes that 1, mixing roasted spent catalytic cracking catalyst material with gaseous SiCl4, and reacting to obtain catalyst product; 2, using de-ionized water to wash the catalyst of the step 1 till the pH value of filtered water is constant, and using organic acid to carry out acid pickling treatment on the washed catalyst; 3, using de-ionized water to wash the catalyst performed with acid pickling of the step 2, filtering, and drying for 0.25 to 4 hours at 100 to 400 degrees centigrade to obtain resuscitated catalyst. According to the resuscitating method, gas-solid hybrid reaction is carried out on the SiCl4 and spent catalytic cracking catalyst, and acid pickling is carried out on the catalyst; the resuscitating method is simple and flexible to operate, the heavy metal content of the resuscitated catalyst is low, the specific surface area is high, and the activity stability is good.

Description

Technical field: [0001] The invention relates to a revival method of a solid catalyst, which belongs to the field of solid waste treatment and application. Background technique: [0002] Catalytic cracking catalyst is the most widely used catalyst in oil refining process. Catalytic cracking catalysts are deactivated by cracking reaction coke formation, high temperature hydrothermal regeneration and heavy metal pollution during use. The balance agent with slightly higher activity and relatively low metal content can be used in some catalytic cracking units or as a start-up agent, while the balance agent with very low activity (low specific surface area) and high heavy metal content will become a waste agent . [0003] For the disposal of spent catalytic cracking catalysts, the more commonly used method is burying, but burying will pollute soil and groundwater resources; therefore, many researchers at home and abroad have done a lot of work in order to reuse spent catalytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/00B01J38/42B01J38/62B01J38/02
Inventor 许本静乔柯杨扬阎子峰刘欣梅张新功
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)