A method for improving the activity of a vanadium-contaminated catalytic cracking catalyst

A catalytic cracking and catalyst technology, used in catalyst regeneration/reactivation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of negative impact of catalyst performance, limited improvement of catalyst activity, and difficulty in accurate control of dosage, etc. The reaction conditions are economical and not harsh, the equipment investment is reduced, and the effect is easy to control

Active Publication Date: 2019-12-17
SINOPEC YANGZI PETROCHEM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The existing regeneration method has the following defects: 1. There are many procedures, especially the traditional method of pickling to remove contaminated metals, which requires a lot of equipment investment, long time, serious corrosion and serious pollution; 2. There are many additives used, and the dosage is difficult Accurate control, and it is easy to have a negative impact on the performance of the catalyst; ③The catalyst activity is limited, and the service life of the catalyst is short; ④The reaction temperature is high, so that the catalyst is deactivated

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  • A method for improving the activity of a vanadium-contaminated catalytic cracking catalyst
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  • A method for improving the activity of a vanadium-contaminated catalytic cracking catalyst

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Embodiment Construction

[0037] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.

[0038] Determination of Ni, V, Fe and other metal content in the catalyst: use ZSX Primus Ⅱ X-ray fluorescence spectrometer (XRF) to measure, test basis: SN / T 1504.5-2005 standard.

[0039] The V price position measurement of catalyst adopts the chemical adsorption method (TPR) of American AutoChem II2920 multifunctional adsorption instrument to measure the average valence state of V on the catalyst, and the reducing gas composition (volume fraction) is H 2 25%, N 2 75%, the gas flow rate is 50ml / min, and the heating rate is 10°C / min. After the temperature is raised to 450°C for reduction, the sample is oxidized in air at 300°C for 1 hour, and cooled to room temperature for the second temperature-programmed reduction.

[0040] Determi...

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Abstract

The invention discloses a vanadium (V) polluted catalytic cracking (FCC) catalyst activity improving method. Specifically, the valence of vanadium in the vanadium polluted catalytic cracking catalystis reduced from V<+5> to V<+3> or V<+4>. The invention can improve the microactivity of the catalytic cracking catalyst by more than 10eta / %. The method provided by the invention has the characteristics of simple equipment process and low cost, and easy control, realizes waste gas utilization, lowers the cost, and prolongs the service life of the catalyst.

Description

technical field [0001] The invention relates to a method for improving the activity of a vanadium-contaminated catalytic cracking catalyst, which belongs to the field of catalysts. Background technique [0002] Catalysts play a very important role in the development of catalytic cracking. The FCC catalyst is a sphere with a particle size of 10-40 μm, Al 2 o 3 , SiO 2 It is the catalyst carrier skeleton; the broken particles are less than 5 μm, and the surface of the catalyst is loaded with a lot of active substances, and the active substances are loaded around and in the pits; these loaded substances are evenly "long" on the surface of the sphere. After the catalyst enters the reaction process, these active substances are covered by carbon deposits, etc., and the surface of the catalyst changes from "white" to "black", which makes the catalytic activity lose; The prolongation of the white catalyst, traces of carbon deposits and harmful elements remain on the white cataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/10B01J38/62B01J38/60
Inventor 陈红徐永业柴子斌
Owner SINOPEC YANGZI PETROCHEM
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