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A hydrogenation method for producing diesel oil in low sulphur

A low-sulfur diesel oil and hydrorefining technology, which is applied in the direction of refining to remove heteroatoms, etc., to achieve the effects of simple process, improved catalyst activity, low equipment investment and operating costs

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

AI Technical Summary

Problems solved by technology

This method can produce a diesel fraction with a sulfur content meeting the Euro IV standard, but it is obtained under relatively harsh operating conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The preparation method of described preferred hydrotreating catalyst I is:

[0017] 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.

[0018] 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.

[0019] The hydrorefining catalyst II is a me...

Embodiment 1

[0035] In this example, a kind of straight-run diesel oil was used as raw material oil A, and its raw material properties are shown in Table 1. It can be seen from Table 1 that the sulfur content of raw material oil A is 14000 μg / g.

[0036] The raw material oil A is mixed with hydrogen and then enters the hydrogenation reactor, which is successively contacted with the hydrogenation protection agent, the hydrofinishing catalyst I and the hydrofinishing catalyst II for reaction, and the obtained reaction product is cooled and separated to obtain hydrogen-rich gas and Diesel products, in which hydrogen-rich gas is recycled. Based on the overall catalyst volume, the loading volume percentages of the hydroprotecting agent, hydrofinishing catalyst I and hydrofinishing catalyst II are 10 volume%, 55 volume% and 35 volume%, respectively. The reaction conditions and the main properties of the diesel product are shown in Table 2. As can be seen from Table 2, the diesel desulfurization ...

Embodiment 2

[0038] In this example, a diesel fraction mixed with straight-run diesel and catalytic diesel is used as raw material oil B. The properties of the raw material are shown in Table 1. It can be seen from Table 1 that the sulfur content of raw oil B is 7000 μg / g.

[0039] The raw material oil B is mixed with hydrogen and then enters the hydrogenation reactor, which is successively contacted with the hydrogenation protection agent, the hydrofinishing catalyst I and the hydrofinishing catalyst II for reaction, and the obtained reaction product is cooled and separated to obtain hydrogen-rich gas and Diesel products, in which hydrogen-rich gas is recycled. Based on the overall catalyst volume, the loading volume percentages of the hydroprotecting agent, hydrofinishing catalyst I and hydrofinishing catalyst II are 10 volume%, 30 volume% and 60 volume%, respectively. The reaction conditions and the main properties of the diesel product are shown in Table 2. As can be seen from Table 2,...

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PUM

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Abstract

This invention discloses a hydrogenation method for producing low-sulfur diesel oil. The method comprises: mixing base oil with hydrogen, introducing into a hydrogenation reactor to orderly contact hydrogenation protecting agent, hydrorefining catalyst I, hydrorefining catalyst II and freely selected hydrorefining catalyst III for reactions, cooling the effluent, and separating to obtain hydrogen-rich gas and liquid product. With the synergism of the catalysts, the whole catalyst activity is improved. By the method, high-sulfur, high-nitrogen and high-metal content diesel oil fraction can be treated under mild conditions, and low-sulfur diesel oil that can meet Europe III standard and Europe IV standard 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 hydrogenation method for producing low-sulfur diesel oil. Background technique [0002] With the increasing emphasis on environmental protection around the world, countries and regions have enacted more stringent environmental protection regulations, among which the restrictions on the sulfur content of diesel oil are particularly harsh. For example, in the emission standards implemented in Europe in 1996, it was stipulated that the sulfur content of diesel should be less than 500 μg / g, and the Euro III standard implemented in 2000 further restricted the sulfur content to less than 350 μg / g, while the Euro III standard implemented in 2005 The IV standard stipulates that the sulfur content in vehicle diesel should be less than 50 μg / g. The World Fuel Specification issued by the World Fuel Council also has stricter restrictions on the sulfur ...

Claims

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Application Information

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IPC IPC(8): C10G45/02
Inventor 高晓冬吴昊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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