Reforming method for coking gasoline

A technology of coking gasoline and coking distillate oil, which is applied in the petroleum industry, processing hydrocarbon oil, hydrotreating process, etc., can solve the problems of unusable fuel gasoline components, octane number decline, etc., and achieve the increase of operation cycle, octane The effect of increased value and high hydrogen yield

Active Publication Date: 2006-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the content of impurities and olefins can be greatly reduced by hydrorefining, and the stability can be improved, but at the same time, the octane number is also greatly reduced, and it cannot be used as a fuel gasoline component.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] The reformate feedstock used in the present invention is prepared.

[0025] For the mixture of coked gasoline, coked diesel oil and straight-run diesel oil with a distillation range of 70-349°C, at 330°C, hydrogen partial pressure 4.8MPa, volume space velocity 1.6 hours -1 Under the conditions of hydrofinishing, the hydrofinishing catalyst used contains 26.0% by mass of WO 3 , 2.6% by mass of NiO, and 71.4% by mass of alumina carrier. On a laboratory distillation device with a capacity of 150 liters, the product after hydrofinishing is distilled, and the fraction at 77-175°C is cut out. The raw material contains 15 ppm of sulfur, <1 ppm of nitrogen, and bromine value of 0.2 g Br / 100 g.

[0026] On a hydrogenation unit with a catalyst loading of 100 ml, use a reforming pre-hydrogenation catalyst at 280 ° C, a hydrogen partial pressure of 1.6 MPa, and a feed volume space velocity of 6.0 hours -1 , Hydrogen / oil volume ratio of 100:1, the above raw materials are pre-refin...

example 2

[0028] According to the method of Example 1, the mixture of coker gasoline, coker diesel oil and straight-run diesel oil with a distillation range of 70 to 338°C is hydrofined, the product after hydrofinishing is distilled, and the fraction at 75 to 172°C is cut, and the fraction is When mixed with straight-run gasoline with the same distillation range, the content of coker gasoline in the mixed raw material is 76.7% by mass, and the content of straight-run gasoline is 23.3% by mass. The mixed raw material contains 31ppm of sulfur, nitrogen <1ppm, and bromine value of 0.1g Br / 100g.

[0029] According to the method of Example 1, the mixed raw material was pre-refined, and the properties of the reformed raw material II obtained after pre-refining are shown in Table 1.

example 3

[0031] Take the straight-run naphtha whose distillation range is 72~172° C., and its sulfur content is 0.8 ppm. Carry out pre-refining according to the method for example 1, the character of the reforming raw material III of gained is shown in Table 1.

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PUM

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Abstract

The coker gasoline reforming process includes the following steps: 1. hydrorefining coker fraction oil, cutting the fraction of distillation range 70-175 deg c for reforming and pre-refining to eliminate impurity and dewatering to material water content below 5ppm; and 2. making the dewatered material to contact with the reforming catalyst for reaction at 470-540 deg c and 0.2-2.0 MPa in the presence of hydrogen, circulating un-reacted hydrogen and controlling water content in circulated hydrogen within 5-20ppm. The said process has effectively raised octane number of the coker gasoline and prolonged service life of the reforming catalyst.

Description

technical field [0001] The present invention is a method for catalytic reforming of coked gasoline, specifically, a method of using coked gasoline as a raw material and utilizing platinum-containing double / multi-metal reforming catalysts to increase its octane number under catalytic reforming conditions . Background technique [0002] Coking is an important thermal processing process in petroleum refining that uses residual oil or heavy low-quality crude oil as raw material, and coking gasoline is a low-quality gasoline fraction produced during the coking process. Coking gasoline has high content of sulfur, nitrogen and other impurities, as well as olefins, extremely poor stability and low octane number. Although the content of impurities and olefins can be greatly reduced by hydrofining, and the stability can be improved, but at the same time, the octane number is also greatly reduced, and it is still unable to be used as a fuel gasoline component. In recent years, under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G69/08
Inventor 任坚强张新宽纪长青张大庆周硕鹏赵燕京
Owner CHINA PETROLEUM & CHEM CORP
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