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Catalytic conversion method for high-yield production of propylene and improvement of quality of light oil, and system for catalytic conversion method

A catalytic conversion method and technology for light oil products, which are applied to the catalytic conversion of multi-producing propylene and improving the quality of light oil products and the system field used for the same, can solve problems such as inability to ensure favorable guarantees.

Active Publication Date: 2019-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, judging from the currently disclosed technologies for increasing the production of low-carbon olefins by catalytic cracking, all or part of the gasoline fractions are provided with a secondary cracking reaction by using mesoporous shape-selective molecular sieves and / or refining gasoline fractions. conditions, to achieve the purpose of increasing the production of propylene, but these technologies were developed before the official promulgation of the motor gasoline standard GB17930-2013, and it is impossible to ensure that the direct production and output meet the requirements of GB17930-2013 that the olefin content is not more than 24% (volume fraction), aromatics content is not more than 40% (volume fraction), benzene content is not more than 1.0% (volume fraction) of the technical requirements of high-octane gasoline

Method used

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  • Catalytic conversion method for high-yield production of propylene and improvement of quality of light oil, and system for catalytic conversion method
  • Catalytic conversion method for high-yield production of propylene and improvement of quality of light oil, and system for catalytic conversion method

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Effect test

Embodiment 1

[0158] Example 1 is used to illustrate the effect of catalytically converting heavy hydrocarbon oil to increase the production of propylene and improve the quality of light oil products provided by the present disclosure.

[0159] Experiments were carried out with a medium-sized plant for continuous reaction-regeneration operation with five reactors, the first of which was a riser with an internal diameter of 16 mm and a height of 3800 mm. The second reactor was a riser reactor with an inner diameter of 16 mm and a height of 3200 mm. The third reactor is a fluidized bed with an inner diameter of 64 mm and a height of 300 mm. The outlet of the riser of the second reactor is connected with the bottom of the fluidized bed of the third reactor. The fourth reactor is an annular fluidized bed, located outside the third reactor, with an outer diameter of 120 mm and a height of 300 mm. The fifth reactor is a fluidized bed, located directly above the third reactor and the fourth reac...

Embodiment 2

[0162] Example 2 is used to illustrate the effect of catalytically converting heavy hydrocarbon oil to increase the production of propylene and improve the quality of light oil products provided by the present disclosure.

[0163] The reaction apparatus that adopts is with embodiment 1. Raw material, main experimental procedure are the same as embodiment 1, and difference is that the raw material nozzle at the bottom of the second reactor riser is the starting point, and the effective length of the riser is defined as 100% along the flow direction of the raw material, and the light end fraction ( Distillation range (initial boiling point ~ 57 ℃) is injected from the starting point of the second reactor riser, and heavy distillate components (distillation range is 178 ℃ ~ 253 ℃) are injected from 70% of the downstream of light distillate components (that is, heavy distillate group The length from the injection position of the fraction to the outlet of the riser of the second re...

Embodiment 3

[0174] Example 3 is used to illustrate the effect of catalytically converting heavy hydrocarbon oil to increase the production of propylene and improve the quality of light oil products provided by the present disclosure. The reaction apparatus that adopts is with embodiment 1. In this embodiment, the fifth reactor is used, and the reaction oil gas from the third reactor and the fourth reactor is further introduced into the fifth reactor for further reaction.

[0175] The regenerated catalyst with a temperature of about 650°C enters the bottom of the riser of the first reactor through the inclined pipe of the regenerated catalyst, and flows upward under the action of the pre-lift steam. Heavy hydrocarbon oil feedstock (see Table 2 for main properties) is heated to about 350°C in a preheating furnace, mixed with atomized water vapor, sprayed into the first reactor through the feed nozzle, and catalyzed by contact with the hot regenerated catalyst conversion reaction. The reac...

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Abstract

The present invention relates to a catalytic conversion method for high-yield production of propylene and improvement of the quality of light oil, and a system for the catalytic conversion method. Thecatalytic conversion method comprises: carrying out a first catalytic reaction on a heavy hydrocarbon oil raw material in a first reactor; injecting the light distillate component having a distillation range of 8-88 DEG C into a second reactor, carrying out a second light distillate catalytic reaction, injecting the heavy distillate component having a distillation range of 145-253 DEG C into a section reactor from the downstream of the light distillate component, and carrying out a second heavy distillate catalytic reaction; introducing a second reaction mixture into a third reactor, and continuously carrying out a third catalytic reaction; injecting the medium distillate component having a distillation range of 41-190 DEG C into a fourth reactor, and carrying out a fourth catalytic reaction; and introducing the first product, the third product and the fourth product into a product separation device, and carrying out product separation. With the method of the present invention, a large amount of propylene can be produced, and the gasoline component having high octane number and meeting the GB17930-2013 automotive gasoline hydrocarbon composition index requirements.

Description

technical field [0001] The present disclosure relates to a catalytic conversion process for increasing propylene production and improving light oil quality and a system for the process. Background technique [0002] In recent years, the rapid growth of global propylene demand has made increasing propylene production an important technical trend in the field of petroleum refining. Even more stringent, it is required that the content of olefins is not more than 24% (volume fraction), the content of aromatics is not more than 40% (volume fraction), and the content of benzene is not more than 1.0% (volume fraction). As crude oil becomes heavier, the supply of light petroleum hydrocarbons is limited. Using traditional heavy oil catalytic cracking technology as a platform, using cheap heavy oil as raw material, and strengthening the deep catalytic cracking reaction of heavy hydrocarbons to produce more propylene, and at the same time The technical route of producing high-standard...

Claims

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Application Information

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IPC IPC(8): C10G55/00C10G11/04C10G11/18
Inventor 朱金泉高永灿谢朝钢崔琰杨轶男
Owner CHINA PETROLEUM & CHEM CORP
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