Preparation method of sulfur-free gasoline

A gasoline and low-quality gasoline technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of small octane loss, large investment, complicated process, etc., and achieve low octane loss and high yield high effect

Active Publication Date: 2016-06-15
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has problems such as large investment, complicated process and high energy consumption, and the treated oil can only meet the National IV clean gasoline standard
[0014] In the existing technology, there is a contradiction between deep desulfurization and excessive loss of octane number in the production of low-sulfur clean gasoline from inferior gasoline, as well as the contradiction of mercaptan regeneration in the process of hydrodesulfurization, so that the existing technology cannot be used under relatively mild conditions. Clean gasoline with low sulfur content, low octane loss and qualified mercaptan

Method used

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  • Preparation method of sulfur-free gasoline
  • Preparation method of sulfur-free gasoline
  • Preparation method of sulfur-free gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] according to figure 1 The flow shown produces sulfur-free gasoline, and the selective hydrogenation catalyst HDDO-100, the first selective hydrodesulfurization catalyst HDOS-200, the second selective hydrogenation catalyst HDOS-200, and the second Two selective hydrodesulfurization catalysts HDOS-200 and hydrorefining catalyst HDMS-100, carry out selective hydrodesulfurization treatment on feedstock oil A (properties are shown in Table 1) to produce sulfur-free gasoline, properties are shown in Table 1, and equipped with H 2 S stripper.

[0067] The selective hydrogenation reaction conditions for HDDO-100 catalyst are as follows:

[0068] Temperature = 135°C

[0069] Pressure = 2.2MPa

[0070] Liquid hourly space velocity = 3h -1

[0071] Hydrogen oil volume ratio = 10v / v

[0072] The first selective hydrodesulfurization reaction conditions for the first selective hydrodesulfurization reactor HDOS-200 catalyst are as follows:

[0073] Temperature = 240°C

[007...

Embodiment 2

[0096] The selective hydrogenation catalyst HDDO-100, the first selective hydrodesulfurization catalyst HDOS-200, and the second selective hydrodesulfurization catalyst HDOS were installed in a 200ml small-scale hydrogenation evaluation device with four hydrogenation reactors in series -200 and hydrorefining catalyst HDMS-100, carry out selective hydrodesulfurization treatment on raw material oil B, and in the hydrogenation reactor equipped with the first selective hydrodesulfurization catalyst and the hydrogenation reactor equipped with the second selective hydrodesulfurization catalyst The hydrogenation reactor is provided with H 2 S stripper.

[0097] Among them, the reaction temperature in the selective hydrogenation reactor is 150°C, the reaction temperature in the second selective hydrodesulfurization reactor is 270°C, and the reaction temperature in the hydrofining reactor is 340°C. The same as Example 1, wherein the properties of feedstock oil B and sulfur-free gasoli...

Embodiment 3

[0103] Under the same conditions as in Example 2, recycle sulfur-free gasoline to the feed port of the device, the recycle amount is 0.3-2 times the amount of raw materials to be treated, and properly adjust the first selective hydrodesulfurization catalyst and the second The reaction temperature of the two-selective hydrodesulfurization catalyst makes the sulfur content of the obtained sulfur-free gasoline less than 5 μg / g, and the other reaction conditions are the same as in Example 2.

[0104] Table 3 shows the properties of the gasoline product obtained after hydrotreating the raw material oil B under the conditions of different recirculation ratios (recycling amount / the amount of raw material to be treated).

[0105] table 3

[0106] recirculation ratio

[0107] It can be seen from the data in Table 3 that under the condition of controlling the sulfur content of the product at 5 μg / g, operating the hydrogenation reactor by recycling a part of sulfur-free gasolin...

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Abstract

The invention provides a preparation method of sulfur-free gasoline. The preparation method of sulfur-free gasoline comprises the following steps: (1), contacting poor-quality gasoline raw materials with selective hydrogenation catalyst in a selective hydrogenation reactor in the presence of hydrogen so as to carry out selective hydrogenation reaction; (2), contacting the product of the step (1) with a first selective hydrogenation and desulfurization catalyst in a first selective hydrogenation and desulfurization reactor so as to carry out the first selective hydrogenation and desulfurization reaction; (3), sending the product of the step (2) into a H2S stripping column, so that an air phase containing H2S is obtained at the top of the column and a liquid phase with H2S removed is obtained at the bottom of the column; (4), contacting the liquid phase obtained in the step (3) with a second selective hydrogenation and desulfurization catalyst in a second selective hydrogenation and desulfurization reactor; and (5), contacting the product obtained in the step (4) with a hydrogenation refining catalyst in a hydrogenation refining reactor. The method disclosed by the invention is capable of preparing sulfur-free gasoline whose sulfur content is no higher than 5 micrograms/gram; moreover, the sulfur-free gasoline is relatively small in octane value loss. In addition, the preparation method is high in product yield.

Description

technical field [0001] The present invention relates to a method for producing sulfur-free gasoline, more specifically to a method for selectively hydrotreating gasoline with high sulfur content and excess mercaptan sulfur to produce sulfur-free gasoline (sulfur content not greater than 5 μg / g) , especially involving the method of selective hydrodesulfurization and sweetening of full fraction catalytic cracked gasoline (FCC gasoline for short). Background technique [0002] With the further stringent environmental protection requirements and the improvement of automobile engine technology, higher requirements have been put forward for the quality of automobile gasoline. At present, the National III standard that the sulfur content index of gasoline is not greater than 150 μg / g has been implemented nationwide. Shanghai and Guangzhou have successively implemented the local IV standard that the sulfur content index of gasoline is not greater than 50 μg / g, and Beijing has implem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 吴青彭成华赵晨曦于坤德付玉梅
Owner CHINA NAT OFFSHORE OIL CORP
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