A method for catalytic cracking diesel hydroisomerization-catalytic cracking

A technology of catalytic cracking diesel oil and hydroisomerization, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., and can solve problems such as difficulty in obtaining high-value low-carbon olefin products, and achieve excellent product quality and product yield High, value-enhancing effect

Active Publication Date: 2021-08-10
CNOOC TIANJIN CHEM RES & DESIGN INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The characteristic of the above-mentioned patents is that gasoline fraction is the target product for the processing of catalytic cracking diesel oil, and it is difficult to obtain high-value low-carbon olefin products

Method used

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  • A method for catalytic cracking diesel hydroisomerization-catalytic cracking
  • A method for catalytic cracking diesel hydroisomerization-catalytic cracking
  • A method for catalytic cracking diesel hydroisomerization-catalytic cracking

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Embodiment 1

[0039] The catalytic cracking raw material and the catalytic cracking diesel cycle oil are mixed and then enter the hydrogenation reaction unit, where they are successively contacted with the hydrogenation protection agent, the hydrofinishing catalyst and the hydroisomerization catalyst. The loading volume percentage of the above catalysts is 5:50:45. The liquid phase material from the hydrogenation reaction unit enters the catalytic cracking reaction unit, adopts the process flow shown in the attached figure, the >185°C catalytic cracking diesel is completely circulated, and is not extracted as a clean diesel blending component.

[0040] Table 2, Table 3 and Table 4 are the process parameters, product distribution and product properties of each reaction section, respectively.

[0041] Table 2 reaction process conditions

[0042] Example 1 Hydrofining Section Process Conditions Hydrofining Reactor Reaction temperature, °C 350 Reaction pressure, MP...

Embodiment 2

[0049] The catalytic cracking raw material and hydrogen are mixed and then enter the hydrogenation reaction unit, where they are sequentially contacted with the hydrogenation protection agent, the hydrofinishing catalyst and the hydroisomerization catalyst. The loading volume percentage of the above catalysts is 5:50:45. The liquid phase material from the hydrogenation reaction unit enters the catalytic cracking reaction unit, and adopts the process flow shown in the attached figure, and the >185°C catalytic cracking diesel is extracted as a clean diesel blending component.

[0050] Table 5, Table 6 and Table 7 are the process parameters, product distribution and product properties of each reaction section, respectively.

[0051] Table 5 reaction process conditions

[0052] Example 2 Hydrofining Section Process Conditions Hydrofining Reactor Reaction temperature, °C 355 Reaction pressure, MPa 10.0 Fresh raw material volumetric space velocity,...

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Abstract

The invention discloses a method for catalytic cracking diesel hydroisomerization-fluid catalytic cracking, comprising the following steps: 1) mixing catalytic cracking diesel oil with hydrogen, and entering a series of hydrogenation reaction devices, wherein the hydrogenation reaction The device is sequentially filled with hydrogenation protection agent, hydrofinishing catalyst, and hydroisomerization catalyst for hydrofinishing-hydroisomerization reaction; 2) hydroisomerized diesel oil enters a fluidized bed catalytic cracking unit for catalytic cracking reaction. The method of the present invention utilizes catalytic cracking diesel oil to produce low-carbon olefins and clean fuel oil products. The method can produce low-carbon olefins content>35wt% in the product and aromatics content>50wt% in the gasoline fraction under the condition of full conversion of catalytic cracking diesel oil, which can be significantly improved. Increase the value of FCC diesel.

Description

technical field [0001] The invention is a method for producing low-carbon olefins and clean fuel oil products by catalytic cracking diesel oil hydroisomerization-catalytic cracking. Background technique [0002] Under the situation of developing low-carbon economy, circular economy and realizing sustainable development, the pace of upgrading the quality of oil products in my country has been significantly accelerated, and the quality requirements for clean oil products are becoming more and more stringent. At present, with the aggravation of heavy and inferior crude oil, the output of catalytic cracking diesel oil is increasing year by year, and the quality is deteriorating day by day. In order to extract more light oil products from crude oil, refining and chemical enterprises have continuously improved the processing capacity and operating severity of catalytic cracking units, resulting in further deterioration of the quality of catalytic cracked diesel oil, mainly manifes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/202
Inventor 南军于海斌于群王庆波张雪梅张景成孙彦民张玉婷肖寒朱金剑彭雪峰张国辉张尚强宋国良潘月秋
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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