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Method for rectifying gasoline

A gasoline and upgrading technology, applied in the petroleum industry, treating hydrocarbon oil, refining hydrocarbon oil, etc., can solve the problems of gasoline octane number loss, low yield of multi-branched products, etc., and achieve low octane number loss Effect

Active Publication Date: 2007-11-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a solution for the disadvantages of low yield of multi-branched products and large loss of gasoline octane number after hydrogenation when the molecular sieve catalyst with mesoporous structure is used in the existing method for skeletal isomerization of olefins. A new gasoline upgrading method

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  • Method for rectifying gasoline

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Embodiment 1

[0053] The gasoline distillate oil was upgraded according to the process flow shown in Figure 1, and the properties of the raw oil are shown in Table 1. The catalysts are: olefin isomerization catalyst IIA, selective hydrodesulfurization catalyst RSDS-1. See Table 2 for operating conditions and Table 3 for oil properties.

Embodiment 2

[0055] The gasoline distillate oil was upgraded according to the process flow shown in Figure 1, and the properties of the raw oil are shown in Table 1. The catalysts are: olefin isomerization catalyst I+IIB, the volume ratio of catalyst IIB to catalyst I is 1:3, and selective hydrodesulfurization catalyst RSDS-1. See Table 2 for operating conditions and Table 3 for oil properties.

Embodiment 3

[0057] The gasoline distillate oil was upgraded according to the process flow shown in Figure 1, and the properties of the raw oil are shown in Table 1. The loading order of catalysts from top to bottom is protective agent RGO-2, olefin isomerization catalyst I, olefin isomerization catalyst IIC, and selective hydrodesulfurization catalyst RSDS-1. Wherein the volume ratio of olefin isomerization catalyst IIC to catalyst I is 2:1, the volume ratio of selective hydrodesulfurization catalyst RSDS-1 to (I+IIC) is 1:2, and the volume ratio of RGO-2 to (I+IIC) The ratio is 1:5. See Table 2 for operating conditions and Table 3 for oil properties.

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Abstract

A process for modifying gasoline comprises the steps of: a) contacting the gasoline fraction and an olefin skeleton isomerization catalyst in the process of olefin isomerization; b) contacting the reaction effluent from the process a) with a hydrogenation and desulphurization catalyst in the process of hydrogenation and desulphurization, wherein the said olefin skeleton isomerization catalyst compound comprises catalyst I and catalyst II, of which the catalyst I comprises a molecular sieve containing decacyclic pores and the catalyst II comprises a molecular sieve containing dodecyclic pores. The content of the catalyst I in the catalyst compound is 0-95 vol. %, and that of the catalyst II in the catalyst compound is 5-100 vol. %. After modification of the gasoline fraction by the process of this invention, the gasoline product has a low loss of the octane number.

Description

technical field [0001] The invention relates to a gasoline upgrading method. Background technique [0002] As we all know, a large number of harmful substances emitted by automobile engines are one of the main sources of air pollution. The sulfur compounds and olefins contained in gasoline are the main precursors of harmful emissions. [0003] Catalytically cracked gasoline, especially the gasoline obtained by catalytic cracking of heavy oil and residual oil, has a high content of sulfur compounds and olefins, and is the main source of sulfur and olefins in gasoline. Therefore, to solve the problem of sulfur and olefins in gasoline, it is mainly to solve the desulfurization and olefin reduction of FCC gasoline. [0004] Sulfur and olefins in gasoline distillates are easily removed under hydrorefining conditions. However, the olefin content in FCC gasoline has a significant impact on gasoline octane number. The higher the olefin content, the high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00C10G45/12
Inventor 李明丰褚阳夏国富聂红石亚华李大东
Owner CHINA PETROLEUM & CHEM CORP