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A method for activity recovery of low-activity hydrogenation upgrading catalyst

A hydrogenation modification and low-activity technology, which is applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of hydrogenation modification catalyst activity reduction and achieve good activity recovery effect , Reasonable utilization of resources, Accelerate the effect of activity stability

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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  • A method for activity recovery of low-activity hydrogenation upgrading catalyst
  • A method for activity recovery of low-activity hydrogenation upgrading catalyst
  • A method for activity recovery of low-activity hydrogenation upgrading catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]The raw material oil after hydrofinishing treatment is introduced into the low-activity hydrogenation-modifying catalyst bed, the nitrogen content of the feedstock oil after hydrofinishing treatment is ~10ppm, and the weight content of the low-activity hydrogenation-modifying catalyst is Contain 60% Y molecular sieve, 0.3% nitrogen element, increase the reaction temperature to 355°C, adjust the temperature, control the conversion rate to be constant at 15%, and keep it stable for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 25%, Stable for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 35%, and stabilize for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 45%, and stabilize for 36 hours; The controlled conversion depth was the same as that of Comparative Example 1.

Embodiment 2

[0026] The raw material oil after hydrofinishing treatment is introduced into the low-activity hydrogenation-modifying catalyst bed, the nitrogen content of the feedstock oil after hydrofinishing treatment is ~10ppm, and the weight content of the low-activity hydrogenation-modifying catalyst is Contain 60% Y molecular sieve, 0.3% nitrogen element, increase the reaction temperature to 355°C, adjust the temperature, control the conversion rate to be constant at 18%, and keep it stable for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 28%, Stable for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 38%, and stabilize for 36 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 48%, and stabilize for 36 hours; the recovery process ends, adjust the process conditions to enter normal production, and The controlled conversion depth is t...

Embodiment 3

[0028] The raw material oil after hydrofinishing treatment is introduced into the low-activity hydrogenation-modifying catalyst bed, the nitrogen content of the feedstock oil after hydrofinishing treatment is ~10ppm, and the weight content of the low-activity hydrogenation-modifying catalyst is Contain 60% Y molecular sieve, 0.33% nitrogen element, increase the reaction temperature to 355°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 for 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 37%, and stabilize for 24 hours; continue to adjust the reaction temperature, control the conversion rate to be constant at 47%, and stabilize for 24 hours; the recovery process ends, adjust the process conditions to enter normal production, and The controlled conversion depth was...

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Abstract

The invention discloses a method for recovering the activity of a low-activity hydrogenation upgrading catalyst. The method is as follows: feed refined oil with a nitrogen content of 0-10 μg / g into the low-activity hydrogenation upgrading catalyst bed, and at the same time adjust the reaction temperature in the upgrading section so that the mass yield of light oil at <175°C is constant at 40 % to 50%, the constant time is 24 to 48 hours, and after the constant is completed, adjust to the hydrogenation and upgrading conditions to react; the low activity hydrogenation and upgrading catalyst contains 50% to 70% of molecular sieves by weight, 0.25 % to 0.45% nitrogen, the molecular sieves include 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.

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): B01J38/00B01J38/56B01J38/02C10G45/08
CPCB01J38/00B01J38/56B01J38/02C10G45/08C10G2300/202C10G2300/1037
Inventor 曹正凯王仲义崔哲唐兆吉
Owner CHINA PETROLEUM & CHEM CORP
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