Two-stage hydrogenation cracking method for producing industrial chemicals

A technology for hydrocracking and chemical raw materials, which is applied in hydrotreating process, petroleum industry, processing of hydrocarbon oil, etc., can solve the problems of large difference in operating pressure, high operating cost and high operating cost, so as to reduce operating cost and improve The effect of utilization rate and simple process flow

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in the operating pressure of the two-stage reaction zone, two independent hydrogen circulation systems are required, and the second-stage t...

Method used

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  • Two-stage hydrogenation cracking method for producing industrial chemicals
  • Two-stage hydrogenation cracking method for producing industrial chemicals
  • Two-stage hydrogenation cracking method for producing industrial chemicals

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Embodiment Construction

[0025] figure 1 Shown is a schematic process flow diagram of the present invention, wherein the first section adopts a series flow process, and the first section and the second section share a fractionation tower. Such as figure 1As shown, the preheated feed oil 1 is mixed with circulating hydrogen 3 and then enters the hydrocracking pretreatment reactor 4, and the obtained hydrogenation effluent 5 is mixed with cold hydrogen and then continues to enter the hydrocracking reactor 6 to obtain hydrocracking The effluent 7 and the hydrocracking effluent 7 are separated in the separator 8 to obtain a hydrogen-rich gas 9 and a liquid stream 10, and the hydrogen-rich gas 9 directly enters the second-stage hydrocracking reactor 18, and the separated liquid stream 10 and the second-stage processing The liquid stream 23 obtained by hydrocracking is mixed into the fractionation tower 11, and fractionation is carried out in the fractionation tower 11 to obtain gas products 12, light naph...

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Abstract

The invention discloses a hydrocracking method for producing chemical raw materials, which is characterized in that the heavy raw material oil is mixed with hydrogen and then enters the first-stage hydrogenation treatment area, and the hydrogen-rich gas obtained by separating the first-stage effluent directly enters the second-stage hydrocracking reaction The liquid enters the fractionation tower for fractionation, and the obtained gas, naphtha and tail oil are used as chemical raw materials to exit the system. The middle distillates are sent to the second-stage hydrotreating area alone or mixed with other low-quality distillates for cracking. The gas is recycled and the liquid enters the fractionation column. Compared with the prior art, the two reaction zones in the method of the present invention share a set of circulating hydrogen system, and can simultaneously convert two or more low-quality raw materials into high value-added products.

Description

technical field [0001] The invention relates to the field of petroleum processing, in particular to a two-stage hydrocracking method for producing chemical raw materials. Background technique [0002] With the rapid development of the world economy, the demand for chemical products has increased dramatically, and correspondingly, the demand for chemical raw materials for the production of these chemical products has also increased significantly. The production of chemical raw materials from petroleum fractions is one of the very important means. The most important chemical raw materials are benzene, toluene, xylene, and ethylene, propylene, etc., and the heavy naphtha obtained through hydrocracking of petroleum fractions is benzene, toluene, di An important source of light aromatics such as toluene, the light naphtha and hydrocracking tail oil obtained have the advantages of good quality and high yield of the target product, so it is a high-quality raw material for steam cra...

Claims

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Application Information

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IPC IPC(8): C10G65/10
Inventor 刘涛曾榕辉白振民赵玉琢石友良孙洪江黄新露宋若霞张学辉
Owner CHINA PETROLEUM & CHEM CORP
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