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

A technology for hydrogenation upgrading and activity recovery, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as the reduction of the activity of hydrogenation upgrading catalysts, and achieve good activity recovery effect and energy saving. , the effect of simple selection

Active Publication Date: 2022-03-08
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 hydrogenation-upgrading catalyst
  • Method for recovering activity of low-activity hydrogenation-upgrading catalyst
  • Method for recovering activity of low-activity hydrogenation-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 35% Y molecular sieve, 0.25% nitrogen element, increase the reaction temperature to 370°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; continue to adjust the reaction temperature, control the conversion rate to be constant at 35%, and stabilize for 36 hours; the recovery process ends, adjust the process conditions 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 35% Y molecular sieve, 0.25% nitrogen element, increase the reaction temperature to 370°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; continue to adjust the reaction temperature, control the conversion rate to be constant at 38%, and stabilize for 36 hours; the recovery process is over, adjust the process conditions 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 35% Y molecular sieve, 0.28% nitrogen element, increase the reaction temperature to 370°C, adjust the temperature, control the conversion rate to be constant at 12%, and stabilize for 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 25%, stable 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 37%, and stabilize for 24 hours; the recovery process is over, adjust the process conditions 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 hydrogenation-upgrading catalyst. The method is to feed refined oil with a nitrogen content of 0-10 μg / g into a low-activity hydrogenation-upgrading catalyst bed, and simultaneously adjust the modification The stage reaction temperature keeps the light oil mass yield <175°C constant at 30%-40%, and the constant time is 24-48 hours. After the constant completion, it is adjusted to the hydrogenation modification condition for reaction; the low-activity hydrogenation modification The catalyst contains 20%-less than 50% molecular sieve and 0.20%-0.40% nitrogen element by weight, and the molecular sieve includes at least one of Y-type or USY molecular sieves. 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 reforming catalyst caused by long-term operation in the hydrogenation refining 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 Patents(China)
IPC IPC(8): B01J29/90B01J29/16C10G45/08
CPCB01J29/90B01J29/166C10G45/08C10G2300/1037C10G2300/202B01J2229/18
Inventor 王仲义崔哲曹正凯唐兆吉彭冲
Owner CHINA PETROLEUM & CHEM CORP
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