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Method and system for gasoline desulfurization and aromatization

An aromatization and gasoline technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, hydrocarbon oil treatment products, etc., can solve the problem of gasoline octane number loss, etc., so as to achieve no reduction in octane number, increase octane number, and reduce investment cost effect

Active Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when dealing with gasoline feedstock with high olefin content and high sulfur content, it still causes a large loss of gasoline octane number

Method used

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  • Method and system for gasoline desulfurization and aromatization
  • Method and system for gasoline desulfurization and aromatization
  • Method and system for gasoline desulfurization and aromatization

Examples

Experimental program
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Effect test

Embodiment approach

[0060] A specific embodiment, based on the dry weight of the adsorption desulfurization catalyst and based on the weight of oxides, the zinc oxide in the adsorption desulfurization catalyst accounts for 10-90% by weight, and the silicon dioxide accounts for 5-85% by weight. %, aluminum oxide accounts for 5-30% by weight; based on the dry basis weight of the adsorption desulfurization catalyst and calculated by element weight, the content of the desulfurization active metal in the adsorption desulfurization catalyst is 5-30% by weight.

[0061]According to the present invention, the olefin aromatization catalyst refers to a catalyst capable of converting hydrocarbons such as olefins in gasoline raw materials into aromatics, generally including molecular sieves, preferably including molecular sieves, supports and metals, for example, on a dry basis and in terms of the olefins Based on the total weight of the aromatization catalyst, the olefin aromatization catalyst may contain 10...

specific Embodiment approach

[0062] A specific embodiment, the preparation process of the molecular sieve with MFI structure can include ammonia exchange, phosphorus modification, metal component modification and roasting treatment steps, more specifically, the molecular sieve with MFI structure obtained by conventional crystallization The sodium type molecular sieve according to the molecular sieve: ammonia salt: H 2 The weight ratio of O=1:(0.1-1):(5-10) is exchanged at room temperature to 100°C for 0.3-1 hour and then filtered to introduce phosphorus-containing compounds and selected from Fe, Co, Ni, Zn, Mn, Ga and one or more of Sn to modify the molecular sieve, and then calcined at 400-800° C. for 0.5-8 hours, wherein the calcining process can also be carried out under a water vapor atmosphere. Furthermore, for the molecular sieve with MFI structure provided by the present invention, the molecular sieve can be modified by impregnation or ion exchange during the preparation process. Further, the phos...

Embodiment 1

[0098] Such as figure 2 As shown, the top of catalytic cracking main fractionation tower 1 adopts a two-stage condensation cooling process. The operating temperature of the first-stage condenser is about 65°C, and the first heavy gasoline fraction HCN-A-1 is separated, and the uncondensed gas phase flows through the second stage. The condenser is cooled to about 40°C, and the first light gasoline fraction LCN-A-1 is obtained by separation. The properties of HCN-A-1 and LCN-A-1 are listed in Table 2. The first heavy gasoline fraction HCN-A-1 is sent to the first set of fluidized reactor 1 and the mixed catalyst of adsorption desulfurization catalyst FCAS and fresh olefin aromatization OTAZ-C-3 (fresh aromatization catalyst OTAZ-C -3 accounts for 7% of the total weight of the mixed catalyst) to contact and carry out desulfurization and aromatization reaction under the state of facing hydrogen, the reaction conditions are listed in Table 5, the first heavy gasoline product obta...

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Abstract

The invention relates to a method and system for desulphurization and aromatization of gasoline. The method comprises the following steps: subjecting a raw gasoline material to primary cutting so as to obtain a first light gasoline fraction and a first heavy gasoline fraction; conveying the first heavy gasoline fraction into a first set of fluidization reactor for contacting with a mixed catalystand carrying out desulphurization and aromatization in the presence of hydrogen so as to obtain a desulphurization and aromatization product; conveying the first light gasoline fraction into a secondset of fluidization reactor for contacting with an adsorption desulfurization catalyst and carrying out a desulphurization reaction so as to obtain a second desulphurization product; subjecting the desulphurization and aromatization product to secondary cutting so as to obtain a second light gasoline fraction and a second heavy gasoline fraction; and subjecting the second light gasoline fraction and the desulphurization product to etherification together so as to obtain etherified oil. The method and system provided by the invention can reduce the contents of sulfur and olefins in gasoline, decrease the octane number loss of the gasoline and maintain high gasoline yield.

Description

technical field [0001] The invention relates to a gasoline desulfurization and aromatization method and system. Background technique [0002] Air pollution caused by vehicle exhaust emissions is becoming more and more serious. As people pay more and more attention to environmental protection, my country has accelerated the pace of upgrading the quality of vehicle fuel. The national standard GB17930-2013 requires that the sulfur content in gasoline should not exceed 10 μg / g, and the olefin volume fraction should not exceed 24%. [0003] FCC gasoline is the main component of motor gasoline in my country, accounting for about 75% in the gasoline pool, and its characteristic is that it has high olefin and sulfur content. It is not difficult to use hydrogenation technology to achieve deep desulfurization of gasoline and reduce the olefin content in FCC gasoline, but since olefin is a high-octane component, a large reduction in its content will lead to a serious loss of gasoline ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00
CPCC10G69/00C10G2300/1037C10G2300/202C10G2400/02
Inventor 许友好王新徐莉于敬川汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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