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Combined hydrogenation method for mineral oil and animal and vegetable oil

A technology for animal and vegetable oils and mineral oils, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment. It can solve the problems of affecting catalyst strength and activity stability, affecting device operation cycle, and increasing operating costs. The effect of low operation cycle, equipment investment and operation cost, and low operation pressure

Active Publication Date: 2010-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

increase operating costs
At the same time, since a large amount of water is generated after hydrogenation of vegetable oil, for conventional hydrogenation catalysts, too high water content will affect the strength and activity stability of the catalyst, thereby affecting the operation cycle of the device

Method used

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  • Combined hydrogenation method for mineral oil and animal and vegetable oil
  • Combined hydrogenation method for mineral oil and animal and vegetable oil
  • Combined hydrogenation method for mineral oil and animal and vegetable oil

Examples

Experimental program
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Effect test

specific Embodiment approach

[0019] By the above analysis and understanding of diesel oil cut hydrocarbon composition and cetane number and composition, the specific implementation mode of the present invention is:

[0020] (1) In the first hydrogenation reaction zone, mineral oil with high sulfur content is in the presence of hydrogen, at a reaction temperature of 300-450°C, a hydrogen partial pressure of 2.0-10.0MPa, and a volumetric space velocity of 1.0-6.0h -1 、Hydrogen oil volume ratio 100~800Nm 3 / m 3 Contact with the hydrotreating catalyst to carry out reactions such as hydrodesulfurization, hydrodenitrogenation, olefin saturation and aromatic hydrocarbon saturation, etc., and the reaction effluent is separated to obtain gas phase stream I and liquid phase stream I; gas phase stream I includes hydrogen, hydrogen sulfide , ammonia and a small amount of light hydrocarbons.

[0021] The sulfur content of the mineral oil is 0.2% to 3.0% by weight, and the boiling point range is 40 to 400°C. The pre...

Embodiment 1

[0049] The raw material oil A is contacted with the hydrofinishing catalyst in the first hydrogenation reactor (one reverse) to react, and the reaction effluent is separated to obtain a gaseous phase stream I and a liquid phase stream I; after the raw material oil B is mixed with the gaseous phase stream I, In the second hydrogenation reactor (second reaction) contact with the hydrotreating catalyst to react, the reaction effluent is separated to obtain the gas phase stream II and the liquid phase stream II; the liquid phase stream I and the liquid phase stream II are mixed and then fractionated system to obtain a diesel product; the gas phase stream II returns to the first hydrogenation reaction zone. The mass ratio of raw material oil A to raw material oil B is 80:20. The concentration of hydrogen sulfide in gas phase stream I was 1.0% by volume. The reaction conditions of this example are shown in Table 2, and the main properties of the diesel product are shown in Table 3....

Embodiment 2

[0051] The raw material oil C is contacted with the hydrofinishing catalyst and the hydrogenation upgrading catalyst in the first hydrogenation reactor (first reverse) to react successively, and the loading volume ratio of the hydrofinishing catalyst and the hydrogenation upgrading catalyst is 70:30; The reaction effluent is separated to obtain a gas phase stream I and a liquid phase stream I; after the raw material oil B is mixed with the gas phase stream I, it is contacted with a hydrogenation protecting agent and a hydrotreating catalyst in the second hydrogenation reactor (second reaction) successively. Reaction, the loading volume ratio of hydrogenation protecting agent and hydrotreating catalyst is 1: 4; Its reaction effluent obtains gaseous phase stream II and liquid phase stream II after separating; Liquid phase stream I and liquid phase stream II mix and go fractionation system to obtain a diesel product; the gas phase stream II returns to the first hydrogenation react...

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Abstract

The invention relates to a combined hydrogenation method for mineral oil and animal and vegetable oil. In two hydrogenation reaction zones, high-sulfur mineral diesel oil distillate and animal and vegetable oil are respectively used as the raw materials and hydrogenated under different conditions, and the products are mixed to obtain a low-surfur or an even ultralow-surfur diesel oil product, wherein the gas-phase compound flow obtained in the first hydrogenation reaction zone is cycled to the second hydrogenation reaction zone, and the gas-phase compound flow obtained in the second hydrogenation reaction zone is cycled to the first hydrogenation reaction zone. The method can process high-sulfur mineral diesel oil distillate and vegetable oil. The method can be used for obtaining a clean diesel oil product with low sulfur content and high content of polycyclic aromatic hydrocarbon and cetane number under mild operating conditions. The invention saves the equipment and the operating procedure for regular sulfur supplement for hydrogenation of the vegetable oil, reduces the effect of water generated by the vegetable oil hydrogenation reaction on the activity of the hydrogenation catalyst, and prolongs the device operation period.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen. More specifically, it is a combined method of hydrogenation of animal and vegetable oils and hydrogenation of high-sulfur diesel oil. Background technique [0002] With the continuous improvement of environmental protection requirements, people's requirements for vehicle fuel specifications are also getting higher and higher. The latest worldwide fuel specifications have imposed tighter controls on diesel targets. The main reason is that there are stricter restrictions on the properties of diesel products such as sulfur content. For example, Europe has implemented the Euro IV emission standard since 2005, in which the diesel product index is required to have a sulfur content of less than 50 μg / g, a polycyclic aromatic hydrocarbon content of less than 11% by weight, and a cetane number index of not less than 51. my country's diesel product indicators are gradu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/02
Inventor 王哲高晓冬陈若雷龙湘云郭群
Owner CHINA PETROLEUM & CHEM CORP
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