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Method for the revival of catalytic cracking catalyzer metal-removing by adopting a gas-phase reduction method

A catalytic cracking and catalyst technology, applied in the direction of catalytic cracking, catalyst regeneration/reactivation, physical/chemical process catalysts, etc., can solve the problems of low removal rate and not harsh operating conditions

Active Publication Date: 2009-08-12
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process is simple, the operating conditions are not harsh, and high value-added nickel carbonyl products can also be produced by-products, but unfortunately the carbonylation reaction is very slow, so the actual removal rate of Ni is very low

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The technical characteristics of the present invention will be described in detail below in conjunction with the embodiments.

[0018] Weigh 20g of FCC balancer, in which the contents of the polluting metals are Ni 1.3%, V 0.05%, Fe 0.56%, and the micro-reaction activity is 56%. At 700°C, H 2 Reduction in medium for 6h, and then washed 3 times with 0.5% nitric acid at 90°C, 1h each time, the mass ratio of acid solution to catalyst was 4 each time. The acid-washed catalyst was rinsed with deionized water three times during filtration, about 20ml each time, and then dried at 120°C.

[0019] After the above-mentioned treatment, the microreaction activity of the catalyst increased to 75, and after the steam aging treatment, the activity still reached 67, showing good stability. Metal Ni was removed by 76%, V by 45%, and Fe by 32%.

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Abstract

The invention relates to a reliving method of the catalytic cracking catalyst demetalization by adopting a gas phase reduction method. The method is mainly used for removing the contamination metals (Ni, V, Fe, etc.) in the fluid catalytic cracking (FCC) catalyst and for recovering the activity of the catalyst. The method is mainly characterized in that the method adopts the hydrogen or refinery dry gas as the reducer and has obvious advantages compared with the H2S gas phase sulphuration used in traditional catalyst demetalization technology. The process mainly includes three steps of gas phase recovery, acid washing and water washing.

Description

technical field [0001] The invention relates to a revival method for demetallizing a catalytic cracking catalyst by using a gas phase reduction method. The method is mainly used for removing polluting metals (Ni, V, Fe, etc.) in the catalytic cracking catalyst and restoring the activity of the catalyst. The method mainly includes three steps of gas-phase reduction, pickling and water washing. Its main technical feature is that it uses hydrogen, refinery catalytic cracking dry gas, CO, natural gas or methane, ethane, etc. It is best to choose hydrogen or refinery dry gas. Gas is used as a reducing agent, and the H used in the traditional catalyst demetallization technology 2 Compared with gas-phase vulcanization of S, it has significant advantages. Background technique [0002] Catalytic cracking (FCC) is the core process of the refinery, responsible for the production of gasoline, diesel and liquefied gas from heavy oil and residual oil. About 80% of my country's commercia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/00B01J38/10C10G11/02
Inventor 李春义山红红袁起民田华杨朝合张建芳
Owner PETROCHINA CO LTD