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Method for rectifying gasoline

A gasoline and upgrading technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of low octane number, little contribution to gasoline octane number maintenance, low content of multi-branched products, etc. , to achieve the effect of increased yield and small liquid loss

Active Publication Date: 2007-12-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the isomerization products are mainly single-branched olefins, and the content of multi-branched products is low
However, the octane number of this monobranched olefin is still low after hydrogenation and saturation, and does not contribute much to the maintenance of gasoline octane number.

Method used

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  • Method for rectifying gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In this example, a heavy distillate of catalytic cracking gasoline is used as raw material, which is denoted as raw material A. Its properties are shown in Table 1.

[0050] Process the raw oil according to the technological process shown in Fig. 1. The catalysts are: olefin skeletal isomerization catalyst Ia, hydrodesulfurization catalyst RS-1A, octane recovery catalyst RIDOS-1, see Table 2 for the operating conditions and properties of the resulting oil.

Embodiment 2

[0054] In this example, a heavy distillate of catalytic cracking gasoline is used as a raw material, which is denoted as raw material B. Its properties are shown in Table 1.

[0055] Process the raw oil according to the technological process shown in Fig. 1. The catalysts are: olefin skeletal isomerization catalyst Ib, hydrodesulfurization catalyst RS-1A, octane recovery catalyst is RIDOS-1, and selective hydrodediene is loaded on olefin skeletal isomerization catalyst Ib Catalyst, the volume ratio of RGO-2 and olefin skeletal isomerization catalyst Ib is 1:5. See Table 2 for the operating conditions and properties of the oil produced.

[0056] Table 1

[0057] sample name

[0058] Table 2

[0059] Example 1

[0060] Comparing the results of Example 1 and Comparative Example 1 given in Table 2, it can be seen that when the method provided by the present invention is used to modify gasoline distillates, under the conditions that desulfurization and ol...

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Abstract

A process for modifying gasoline, comprising 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 olefin skeleton isomerization zone with a hydrogenation and desulphurization catalyst in the process of hydrogenation refinery; c) contacting the reaction effluent from the hydrogenation refinery zone with an octane number recovery catalyst in the process of mild hydrogenation pyrolysis, wherein the said skeleton isomerization catalyst comprises at least one molecular sieve containing dodecyclic pores. After modification of the gasoline fraction by the process of this invention, the gasoline product has a high yield and 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 has a significant impact on the octane number of gasoline. The higher the olefin content, the greater the octane number loss due to ol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/00
Inventor 李明丰褚阳夏国富聂红石亚华李大东
Owner CHINA PETROLEUM & CHEM CORP