A hydrocracking catalyst grading method and catalytic diesel hydroconversion process

A hydrocracking and catalyst technology, which is used in catalyst regeneration/reactivation, physical/chemical process catalysts, molecular sieve catalysts, etc., to improve the selectivity of hydrogenation and cracking reactions, improve cetane number, and ensure the quality of diesel products. Effect

Active Publication Date: 2019-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The single catalyst system of the cracking reactor in the traditional catalytic diesel hydroconversion process cannot meet such reaction requirements, so this technology needs to be further improved

Method used

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  • A hydrocracking catalyst grading method and catalytic diesel hydroconversion process
  • A hydrocracking catalyst grading method and catalytic diesel hydroconversion process
  • A hydrocracking catalyst grading method and catalytic diesel hydroconversion process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Take the hydrocracking standby agent 1 after the operation of an industrial catalytic diesel hydroconversion unit and place it in the regeneration furnace;

[0042] (2) Introduce an oxygen / nitrogen mixed gas with an oxygen content of 1v% into the regeneration furnace, control the gas / agent ratio to 4000, and at the same time, raise the temperature to 380°C at a heating rate of 25°C / h, and obtain Example 1 after 4 hours of constant temperature roasting Regenerant, number T-1;

Embodiment 2

[0044] (1) Take the hydrocracking standby agent 2 after the operation of an industrial catalytic diesel hydroconversion unit and place it in the regeneration furnace;

[0045] (2) Introduce an oxygen / nitrogen mixed gas with an oxygen content of 3v% into the regenerating furnace, control the gas / agent ratio to 1500, at the same time, raise the temperature to 350°C at a heating rate of 25°C / h, and obtain Example 2 after constant temperature roasting for 10 hours Regenerant, No. T-2

Embodiment 3

[0047] (1) Take the hydrocracking standby agent 3 after the operation of an industrial catalytic diesel hydroconversion unit and place it in the regeneration furnace;

[0048] (2) Introduce oxygen / CO with an oxygen content of 3v% into the regeneration furnace 2 Gas mixed gas, the gas / agent ratio is controlled to 1500, at the same time, the temperature is raised to 300°C at a heating rate of 25°C / h, and the regenerant of Example 3 is obtained after constant temperature roasting for 15 hours, numbered T-3;

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Abstract

The invention discloses a hydrocracking catalyst grading method and a catalytic diesel oil hydro-conversion process. The grading method comprises steps as follows: a hydrocracking reactor is equally divided into 2-8 reaction zones in the material flow direction, each reaction zone is filled with a hydrocracking catalyst containing a regenerant, on the basis of the weight of the hydrocracking catalyst, the content of the regenerant in the hydrocracking catalyst is 10wt%-90wt%, and the content of the regenerant in the hydrocracking catalyst in each reaction zone in the material flow direction is gradually increased. The invention further provides the catalytic diesel oil hydro-conversion process including the hydrocracking catalyst grading method. The cracking reactor is filled with catalysts with different reaction properties in a graded manner, so that the hydrogenation selectivity of diesel oil / gasoline components in the conversion process is improved, and the yield of a high-octane gasoline product is increased.

Description

technical field [0001] The invention relates to a hydrocracking catalyst grading method and a catalytic diesel hydrogenation conversion process. Background technique [0002] In recent years, with the increasingly heavy quality of crude oil processed in China, the raw materials processed by catalytic cracking are also becoming heavier and inferior. In addition, many companies have carried out the optimization of catalytic cracking units in order to improve the quality of gasoline or increase the production of propylene. The modification or improvement of the operating severity of the catalytic cracking unit resulted in deterioration of the quality of catalytic cracking products, especially catalytic diesel. [0003] In order to improve the utilization rate of petroleum resources, improve the overall quality level of gasoline and diesel fuel, realize the goal of product blending optimization and product value maximization, and meet the growing demand for clean fuels in China,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/16B01J38/04C10G47/20
Inventor 柳伟杜艳泽秦波张晓萍阮彩安王阔
Owner CHINA PETROLEUM & CHEM CORP
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