Method for recovering activity of low-activity hydro-upgrading catalyst

A hydrogenation modification and low-activity technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of activity reduction of hydrogenation modification catalysts, achieve good activity recovery effect, and select the method Simple, simple process effect

Active Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has the advantages of simple process and stable operation, and solves the problem of how to restore the activity reduction of the hydrogenation upgrading catalyst caused by long-term operation in the hydrorefining mode

Method used

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  • Method for recovering activity of low-activity hydro-upgrading catalyst
  • Method for recovering activity of low-activity hydro-upgrading catalyst
  • Method for recovering activity of low-activity hydro-upgrading catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]Into the bed of the low-activity hydro-upgrading catalyst, feed the feedstock oil after hydrofinishing treatment, the nitrogen content of the feedstock oil after hydrofinishing treatment is 10ppm, and the content of the low-activity hydro-upgrade catalyst is calculated by weight Contain 10% Y molecular sieve, 0.20% nitrogen element, increase the reaction temperature to 385°C, adjust the temperature, control the conversion rate to be constant at 15%, and stabilize for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 25%, stable 36 hours; the recovery process is over, and the process conditions are adjusted to enter normal production, and the controlled conversion depth is the same as that of Comparative Example 1.

Embodiment 2

[0027] Into the bed of the low-activity hydro-upgrading catalyst, feed the feedstock oil after hydrofinishing treatment, the nitrogen content of the feedstock oil after hydrofinishing treatment is 10ppm, and the content of the low-activity hydro-upgrade catalyst is calculated by weight Contain 10% Y molecular sieve, 0.20% nitrogen element, increase the reaction temperature to 385°C, adjust the temperature, control the conversion rate to be constant at 18%, and stabilize for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 28%, stable 36 hours; the recovery process is over, and the process conditions are adjusted to enter normal production, and the controlled conversion depth is the same as that of Comparative Example 2.

Embodiment 3

[0029] Into the bed of the low-activity hydro-upgrading catalyst, feed the feedstock oil after hydrofinishing treatment, the nitrogen content of the feedstock oil after hydrofinishing treatment is 10ppm, and the content of the low-activity hydro-upgrade catalyst is calculated by weight Contain 10% Y molecular sieve, 0.23% nitrogen element, increase the reaction temperature to 385°C, adjust the temperature, control the conversion rate to be constant at 12%, and keep it stable for 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 25%, stable 24 hours; the recovery process is over, and the process conditions are adjusted to enter normal production, and the controlled conversion depth is the same as that of Comparative Example 1.

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Abstract

The invention discloses a method for recovering the activity of a low-activity hydro-upgrading catalyst, comprising the following steps: introducing nitrogen with the content of 0-10mu g/g into the low-activity hydro-upgrading catalyst bed, adjusting the reaction temperature of the upgrading section to enable the mass yield of the light oil of being less than 175 DEG C to be 20%-30% constantly for24-48 hours, and adjusting to hydro-upgrading conditions for reaction after the completion of the constant reaction. The low-activity hydro-upgrading catalyst comprises, by weight, 0%-less than 20% of a molecular sieve and 0.15%-0.35% of a nitrogen element, wherein the molecular sieve comprises at least one of a Y-type molecular sieve and a USY molecular sieve. The method has the advantages of simple process and stable operation, and solves the problem of how to recover the activity of the hydro-upgrading catalyst due to reduction of the activity of the hydro-upgrading catalyst caused by long-term operation according to a hydrofining mode.

Description

technical field [0001] The invention relates to a method for recovering the activity of a low-activity hydrogenation-modifying catalyst, in particular to a method for recovering the activity of a hydrogenation-modifying catalyst in which the activity of the hydrogenation-modifying catalyst is reduced due to long-term low-temperature operation. Background technique [0002] Hydrocracking technology refers to the hydrogenation process that makes more than 10wt% of the molecules in the raw material smaller through the hydrogenation reaction. DAO) hydrodesulfurization, hydrodenitrogenation, polycyclic aromatic hydrocarbons hydrosaturation and ring-opening cracking, and conversion into light oil and middle distillate oil and other target products. Hydrocracking technology has many advantages such as strong raw material adaptability, flexible product scheme, high liquid product yield, and good product quality. It has been favored by oil refining companies all over the world, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01J29/90C10G45/12
CPCB01J29/166B01J29/90C10G45/12C10G2300/1037C10G2300/202B01J2229/18
Inventor 王仲义崔哲唐兆吉曹正凯彭冲
Owner CHINA PETROLEUM & CHEM CORP
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