Method and system for catalytic conversion of poor quality raw material oil

A catalytic conversion method and a technology for inferior feedstock oil, which are applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problem of high operating conditions of the hydrotreating unit, failing to meet the specifications of commercial diesel oil, and affecting the gasoline pool. Octane number level and other issues, to achieve the effect of improving the regeneration operation cycle, achieving efficient utilization, and increasing density

Active Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems caused by direct catalytic cracking of inferior raw material oil include low yield of low-carbon olefins, high olefin content in gasoline, high density of diesel oil and low cetane number of diesel oil, etc. Therefore, gasoline and diesel oil cannot be used as commercial gasoline and diesel oil. The blending components, especially the obtained catalytic diesel oil, even if hydrofining is carried out, the cetane number will increase slightly, and it still cannot meet the specifications of commercial diesel oil
The problem of catalytic cracking after hydrogenation of low-quality feedstock is that the operating conditions of the hydrogenation unit are harsh and the investment in the unit is relatively high; secondly, the octane number of gasoline will decrease, which seriously affects the octane number level of the gasoline pool

Method used

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  • Method and system for catalytic conversion of poor quality raw material oil
  • Method and system for catalytic conversion of poor quality raw material oil
  • Method and system for catalytic conversion of poor quality raw material oil

Examples

Experimental program
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Effect test

Embodiment approach

[0063] A specific embodiment, the pre-lifting section is provided with a first regenerated catalyst inlet, the lower part of the first reaction section I is provided with a first inferior raw material oil inlet, and the middle and lower part of the enlarged diameter section III is provided with a catalyst outlet, The second reaction section II is provided with a second regenerated catalyst inlet, the top of the settling section 8 is provided with a reaction product outlet, and the stripping section 10 is provided with an outlet for a raw catalyst, and the raw material inlet of the product separation unit 18 is connected to the The reaction product outlet at the top of the settling section 8 is in fluid communication, the diesel product outlet of the product separation unit 18 is in fluid communication with the raw material inlet of the aromatics extraction unit 24, and the raffinate diesel product outlet of the aromatics extraction unit 24 is in communication with the The feeds...

Embodiment 1

[0082] This example follows figure 1 The process of the test is carried out, and the vacuum residue A is used as the inferior raw material oil of catalytic conversion, in the medium-sized device of the riser reactor (the height of the riser reactor 2 is 30 meters, the inner diameter of the pre-lift section is 0.8 meters, and the pre-lift section The height of the first reaction section I is 1.5 meters, the inner diameter of the first reaction section I is 1 meter, the height of the first reaction section I is 21 meters, the inner diameter of the expansion section III is 3 meters, the height of the expansion section III is 1.5 meters, and the outlet section 7 The inner diameter is 0.8 meters, the height of the outlet section 7 is 6 meters, the same below), and the vacuum residue A enters the lower part of the first reaction section I, contacts with the catalyst GZ-1 and expands the diameter in the first reaction section I. The first catalytic conversion reaction occurs in secti...

Embodiment 2

[0088] This example follows figure 1 The flow process of the low-quality hydrogenated residue B is used as the raw material of the low-quality raw oil, and the test is carried out on the medium-sized device of the riser reactor used in Example 1. The low-quality hydrogenated residue B enters the lower part of the first reaction section I, and the catalyst CGP-1 contacts and carries out the first catalytic conversion reaction in the first reaction section I, diameter expansion section III and outlet section 7. The conditions of the first catalytic conversion reaction are: the temperature of the first reaction section I is 600°C, the first reaction The reaction time of the section is 0.4 seconds, the agent-oil ratio is 6, and the water-oil ratio is 0.25. The residence time of the catalyst in the diameter-expanding section III is 0.1 seconds, and 8% of the catalyst leaves the diameter-expanding section III and enters the regenerator 13 for regeneration. The hydrogenated raffinate...

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Abstract

The invention discloses a method and a system for catalytic conversion of poor quality raw material oil. The method comprises: carrying out a catalytic conversion reaction on poor quality raw materialoil sequentially with a riser reactor and a settler, feeding the obtained reaction product into a product separation unit, separating, and sequentially carrying out aromatic hydrocarbon extraction and hydrogenation treatment on the obtained diesel oil, wherein the partial catalyst is taken out from the diameter expanding section at the middle portion of the riser reactor, and the partial regeneration catalyst is fed into the settler. According to the present invention, by organically combining the catalytic conversion, the aromatic hydrocarbon extraction, the hydrogenation treatment and otherprocesses and the process apparatuses, the low carbon olefins, the light fuel oil and the heavy aromatic hydrocarbons are produced from the poor quality raw material oil at a maximum so as to achievethe efficient utilization of petroleum resources.

Description

technical field [0001] The invention relates to a catalytic conversion method and system for inferior raw material oil. Background technique [0002] Low-carbon olefins represented by ethylene and propylene are the most basic raw materials in the chemical industry. Natural gas or light petroleum fractions are mostly used as raw materials at home and abroad, and low-carbon olefins are produced by steam cracking technology in ethylene complexes. During the production of ethylene, a large number of other basic raw materials such as olefins and aromatics are produced by-products, and the corresponding ethylene production must be linked with the production of various intermediate products and final products. In addition to the production of ethylene, about 70% of propylene, 90% of butadiene, and 30% of aromatics come from steam cracking by-products. Although the steam cracking technology has been developed for decades and the technology has been continuously improved, it still h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/04C10G69/04
Inventor 张久顺龙军魏晓丽
Owner CHINA PETROLEUM & CHEM CORP
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