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Gasoline desulfurization method

A gasoline and light gasoline technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problem of gasoline octane number loss, achieve the effect of increasing octane number, reducing olefins, and reducing gasoline vapor pressure

Active Publication Date: 2018-10-16
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Gasoline desulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0048] 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.

[0049] According to the present invention, etherification treatment refers to the C 5 The following low-carbon hydrocarbons (such as isopentene and cyclopentene) are etherified with alcohols to generate high-octane etherified oils. For example, the etherification treatment step may include: The second light gasoline fraction and the second desulfurization product are contacted with alcohols, so that the olefins in the second light gasoline frac...

Embodiment 1

[0059] The gasoline fraction used in Example 1 is refinery stable gasoline A, and its properties are listed in Table 1. Such as figure 1As shown, the stable gasoline A is distilled in the gasoline raw material cutting tower 1, cut into the first light gasoline fraction and the first gasoline heavy fraction, and the final boiling point of the first light gasoline fraction is controlled to be 65-70 ° C (according to ASTM D86 standard conduct). Wherein, the first light gasoline fraction obtained by the distillation of stable gasoline A is denoted as LCN-A-1, and the first heavy gasoline fraction is denoted as HCN-A-1, and the properties are listed in Table 2; the first heavy gasoline fraction HCN-A- 1 into the first set of fluidized reactor 4 to contact with the desulfurization catalyst FCAS and carry out the first desulfurization reaction in the state of hydrogen, the reaction conditions are listed in Table 4, the reaction product obtained from the top of the reactor is cooled ...

Embodiment 2

[0061] The operation of Example 2 is basically the same as that of Example 1, except that the temperature of the second desulfurization reaction is controlled to be 410° C. to obtain a gasoline product, whose properties are shown in Table 5.

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Abstract

The invention relates to a gasoline desulfurization method. The gasoline desulfurization 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 an adsorption desulfurizationcatalyst and carrying out a first desulfurization reaction in the presence of hydrogen so as to obtain a first desulfurization product; conveying the first light gasoline fraction into a second set of fluidization reactor for contacting with the adsorption desulfurization catalyst and carrying out a second desulfurization reaction so as to obtain a second desulfurization product; subjecting the first desulfurization product to secondary cutting so as to obtain a second light gasoline fraction and a second heavy gasoline fraction; and subjecting the second desulfurization product and the second light gasoline fraction to etherification together so as to obtain etherified oil. The method provided by the invention can reduce the contents of sulfur and olefins in gasoline, decrease the octanenumber loss of the gasoline and maintain high gasoline yield.

Description

technical field [0001] The invention relates to a method for gasoline desulfurization. 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 octane, thus affecting Du...

Claims

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Application Information

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IPC IPC(8): C10G69/14
CPCC10G69/14C10G2300/202
Inventor 白旭辉许友好王新
Owner CHINA PETROLEUM & CHEM CORP
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