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Method for producing diesel oil with low sulphur and low arene

A low-aromatic and diesel technology, applied in the field of low-aromatic diesel and low-sulfur production, can solve problems such as high operating risk, high cost, and reduced operational flexibility, and achieve low operating pressure, simple process, and low equipment investment and operating costs Effect

Active Publication Date: 2007-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can produce low-sulfur and low-aromatic diesel oil, but the use of noble metal catalysts in this method increases the cost, increases the risk of operation, and reduces the flexibility of operation

Method used

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  • Method for producing diesel oil with low sulphur and low arene

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preparation example Construction

[0021] The preparation method of described preferred hydrotreating catalyst I is:

[0022] The hydrated aluminum oxide and additives are mixed and molded, dried, and then calcined at 500-1000° C. for 1-6 hours under air to obtain the carrier. The carrier is immersed in the prepared aqueous solution of cobalt-containing compound and molybdenum-containing compound for 2-5 hours, dried at 100-300°C for 1-6 hours; calcined at 350-550°C for 1-6 hours to obtain catalyst products.

[0023]The cobalt compound and molybdenum compound aqueous solutions can be prepared by conventional methods. The cobalt compound and the molybdenum compound are respectively selected from one or more of their soluble compounds. Wherein the cobalt compound is preferably one or more of cobalt nitrate, cobalt chloride, and basic cobalt carbonate, and the molybdenum compound is preferably ammonium molybdate. The hydrated alumina is preferably pseudoboehmite.

[0024] The hydrorefining catalyst II is a met...

Embodiment 1

[0039] The raw material oil A is mixed with hydrogen and enters the hydrogenation reactor, passes through the first hydrogenation reaction zone and the second hydrogenation reaction zone in turn, and reacts with the hydrofinishing catalyst I and the hydrofinishing catalyst II respectively, and the reaction product After cooling and separation, the obtained hydrogen-rich gas is recycled, and the obtained liquid phase stream enters the fractionation system, and after fractionation, naphtha fraction, light diesel fraction and heavy diesel fraction are obtained, of which 40% by weight of the heavy diesel fraction is returned In the second hydrogenation reaction zone in the hydrogenation reactor, the fractionation point of the light diesel fraction and the heavy diesel fraction is 330° C., and the filling volume ratio of the hydrofinishing catalyst I and the hydrofinishing catalyst II is 5:5. The reaction conditions of this embodiment are as shown in Table 2, and the main properties...

Embodiment 2

[0041] The raw material oil A is mixed with hydrogen and enters the hydrogenation reactor, passes through the first hydrogenation reaction zone and the second hydrogenation reaction zone in turn, and reacts with the hydrofinishing catalyst I and the hydrofinishing catalyst II respectively, and the reaction product After cooling and separation, the obtained hydrogen-rich gas is recycled, and the obtained liquid phase stream enters the fractionation system, and after fractionation, naphtha fraction, light diesel fraction and heavy diesel fraction are obtained, and 80% of the heavy diesel fraction is returned to In the second hydrogenation reaction zone in the hydrogenation reactor, the fractionation point of the light diesel fraction and the heavy diesel fraction is 320° C., and the loading volume ratio of the hydrofinishing catalyst I and the hydrofinishing catalyst II is 3:7. The reaction conditions of the present embodiment are as shown in Table 2, and the main properties of t...

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Abstract

This invention discloses a method for producing low-sulfur low-arene diesel oil. The method comprises: mixing base oil and hydrogen, introducing into a hydrogenation reactor, reacting in the first hydrogenation region by contacting hydrorefining catalyst I, directly introducing the reaction product into the second hydrogenation region without separation, reacting by contacting hydrorefining catalyst II, cooling and separating the reaction product to obtain hydrogen-rich gas and liquid substance, circulating the hydrogen-rich gas for repeated use, introducing the liquid substance into a fractionating system, fractionating to obtain crude gasoline fraction, light diesel oil fraction and heavy diesel oil fraction, introducing part or all of the heavy diesel oil fraction bake to the hydrogenation reactor. By the method, high-sulfur, high-nitrogen and high-metal content diesel oil fraction can be treated under mild conditions, and clean diesel oil (with low sulfur content and low arene content) can be obtained. The method has such advantages as simple process, low operation pressure, low apparatus investment and low operation cost.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a method for producing low-sulfur, low-aromatic diesel oil. Background technique [0002] Studies have found that by reducing the sulfur content and aromatics content in diesel for vehicles, the generation of sulfur dioxide and solid particles in the diesel combustion process can be reduced. Sulfur content and aromatics content in diesel fuel are continually being imposed with stricter limits. For example, the Euro III emission standard implemented in Europe since 2000 stipulates that the sulfur content of vehicle diesel is less than 350 μg / g, and the polycyclic aromatic hydrocarbons cannot exceed 11% by weight; the Euro IV emission standard implemented in 2005 stipulates that the sulfur content of vehicle diesel Less than 50 μg / g, PAHs cannot be higher than 11% by weight. In addition, the "World Fuel Oil Code" puts forward more stringent re...

Claims

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Application Information

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IPC IPC(8): C10G65/04
Inventor 吴昊高晓冬王哲聂红龙湘云刘学芬何宗付孟勇新
Owner CHINA PETROLEUM & CHEM CORP
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