Hydrocracking method

A hydrocracking and hydrorefining technology, applied in hydrotreating process, petroleum industry, hydrocarbon oil treatment products, etc., can solve the problems of low improvement of jet fuel quality, low economic benefit, limited yield of chemical raw materials, etc.

Active Publication Date: 2020-03-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method organically combines the high temperature and high pressure counter-current heat transfer technology with the hydrocracking catalyst grading technology, comprehensively utilizes the heat of hydrocracking reaction, and not only fully utilizes the characteristics of two different types of hydrocra...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Using raw oil 1 as raw material, there are 2 catalyst beds in the hydrofinishing reactor and 3 catalyst beds in the hydrocracking reactor, and the catalysts are loaded sequentially along the flow direction ,catalyst and Catalyst III, the catalyst loading volume ratio is 1:1:1. See Tables 4 and 5 for specific hydrogenation reaction conditions, product distribution and properties.

Embodiment 2

[0045] Same as Example 1, two catalyst beds are set in the hydrotreating reactor, the difference is that the catalyst loading volume ratio is 2:1:1. See Tables 4 and 5 for specific hydrogenation reaction conditions, product distribution and properties.

Embodiment 3

[0047] Same as in Example 1, two catalyst beds are set in the hydrotreating reactor, the difference is that the catalyst loading volume ratio is 1:2:1. See Tables 4 and 5 for specific hydrogenation reaction conditions, product distribution and properties.

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PUM

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Abstract

The invention discloses a hydrocracking method, which comprises the following steps: (1) mixing a diesel oil raw material and hydrogen, feeding the mixture into a hydrofining reactor, and carrying outa desulfurization, denitrification and aromatic hydrocarbon saturation reaction; and (2) feeding the effluent obtained in the step (1) into a hydrocracking reactor, wherein the hydrocracking reactorcomprises first to nth catalyst bed layers in a material direction, n is greater than or equal to 3, preferably n is 3 or 4, the first to (n-1)th catalyst bed layers are filled with a hydrocracking catalyst containing a modified Y molecular sieve, and the nth catalyst bed layer is filled with a hydroisomerization catalyst containing a beta or ZSM molecular sieve and other molecular sieves with strong isomerization performance. According to the method, diesel oil is used as a raw material, and through reasonable combination of hydrocracking catalysts with different functions, the yield of heavynaphtha with high aromatic potential is increased, and the low-temperature fluidity of aviation kerosene and diesel oil products is improved.

Description

technical field [0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method for producing high-quality clean fuel and improving low-temperature fluidity of middle distillates by using diesel oil as raw material, especially straight-run diesel oil. Background technique [0002] Hydrocracking technology has the characteristics of strong adaptability to raw materials, great flexibility in production operations and product plans, and good product quality. It can directly convert various heavy and low-quality feedstocks into high-quality jet fuel, diesel, and lubricating oil base materials that are urgently needed by the market. As well as chemical naphtha and tail oil steam cracking raw materials for ethylene production, it has become one of the most important heavy oil deep processing processes in modern oil refining and petrochemical industries, and has been increasingly widely used at home and abroad. With the reduction of demand in my coun...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1048C10G2300/1055C10G2300/1059C10G2300/202C10G2300/70C10G2400/04
Inventor 崔哲吴子明王仲义孙士可彭冲曹正凯范思强
Owner CHINA PETROLEUM & CHEM CORP
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