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A method for recovering the activity of a low-activity hydrotreating, upgrading, and pour point depressing catalyst

A hydrogenation-upgrading, low-activity technology, used in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. Accelerates the effect of stable activity and 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 hydromodification decondensation catalyst caused by the long-term operation in accordance with the hydrorefining mode

Method used

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  • A method for recovering the activity of a low-activity hydrotreating, upgrading, and pour point depressing catalyst
  • A method for recovering the activity of a low-activity hydrotreating, upgrading, and pour point depressing catalyst
  • A method for recovering the activity of a low-activity hydrotreating, upgrading, and pour point depressing catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Feed the feedstock oil after hydrofining treatment into the bed of the low-activity hydrogenation-modifying-point-point-depressing catalyst. Contain 5% β molecular sieve and 0.20% nitrogen element by weight, increase the reaction temperature to 380°C, adjust the temperature, control the freezing point of diesel products to drop by 10°C, and stabilize for 36 hours; continue to adjust the reaction temperature to control diesel products Decrease in freezing point by 20°C and stabilize for 36 hours; continue to adjust the reaction temperature to control the decrease in freezing point of diesel products by 30°C and stabilize for 36 hours; after the recovery process is over, adjust the process conditions and enter normal production. .

Embodiment 2

[0027] Feed the feedstock oil after hydrofining treatment into the bed of the low-activity hydrogenation-modifying-point-point-depressing catalyst. Contain 5% β molecular sieve and 0.20% nitrogen element by weight, increase the reaction temperature to 380°C, adjust the temperature, control the freezing point of diesel products to drop by 15°C, and stabilize for 36 hours; continue to adjust the reaction temperature to control diesel products The freezing point drops by 25°C and stabilizes for 36 hours; continue to adjust the reaction temperature to control the freezing point of diesel products to drop by 35°C and stabilize for 36 hours; after the recovery process is over, adjust the process conditions and enter normal production, and the controlled pour point depression depth is the same as that of Comparative Example 2 .

Embodiment 3

[0029] Feed the feedstock oil after hydrofining treatment into the bed of the low-activity hydrogenation-modifying-point-point-depressing catalyst. The medium contains 5% β molecular sieve and 0.20% nitrogen element by weight. Increase the reaction temperature to 380°C, adjust the temperature, control the freezing point of diesel products to drop by 15°C, and stabilize for 24 hours; continue to adjust the reaction temperature to control diesel products. Decrease in freezing point by 20°C and stabilize for 24 hours; continue to adjust the reaction temperature to control the decrease in freezing point of diesel products by 35°C and stabilize for 24 hours; after the recovery process is over, adjust the process conditions and enter normal production. .

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Abstract

The invention discloses a method for recovering the activity of a low-activity hydrotreating, upgrading, and depressing catalyst. The invention discloses a method for recovering the activity of a low-activity hydrogenation upgrading catalyst. The refined oil with a nitrogen content of 0-10 μg / g is introduced into a bed of a low-activity hydrogenation upgrading and pour point depressing catalyst, and the upgrading and pour point depressing catalyst is adjusted at the same time. The reaction temperature in the first stage keeps the freezing point of the diesel product constant at 30°C to 35°C compared with the refined oil, and the constant time is 24 to 48 hours. The pour point depressing catalyst contains 5%-50% molecular sieve and 0.15%-0.45% nitrogen element by weight, and the molecular sieve is β-type molecular sieve. 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 modifying decondensation catalyst caused by long-term operation in the hydrorefining mode.

Description

technical field [0001] The invention relates to a method for recovering the activity of a low-activity hydrogenation-modifying and pour-point-depressing catalyst, in particular to a method for recovering the activity of a hydrogenation-modifying and pour-point-depressing catalyst in which the activity of the hydrogenation-modifying and pour-point depressing 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 qu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/90B01J29/78C10G45/12
CPCB01J29/90B01J29/7815C10G45/12C10G2300/1037C10G2300/202B01J2229/18
Inventor 王仲义崔哲曹正凯唐兆吉范思强
Owner CHINA PETROLEUM & CHEM CORP
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