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Hydrogenation method for producing high grade diesel oil and high grade reforming raw material

A diesel and raw material technology, applied in the field of hydrogenation for the production of high-quality diesel and high-quality reforming raw materials, can solve the problems of low naphtha yield, increased cost, and reduced operational flexibility, and achieve simple process flow and moderate process conditions , The effect of strong adaptability of raw materials

Active Publication Date: 2008-07-02
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] CN1234814C discloses a method for hydrogenation of distillate oil. This patented method adopts a hydrogenation catalyst to process heavy catalyzed diesel oil raw material under medium pressure, and mainly produces high-yield diesel fraction. Although this method can obtain higher diesel oil yield, but the naphtha yield is low, and the cetane number of diesel products increases by about 10 units
However, due to the use of noble metal catalysts in this method, the cost is increased and the operational flexibility is reduced.

Method used

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  • Hydrogenation method for producing high grade diesel oil and high grade reforming raw material

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Effect test

Embodiment 1

[0050] In this embodiment, a kind of catalytic diesel is used as raw material oil A, and the main properties of the raw material are shown in Table 1. As can be seen from Table 1, the cetane number of this raw material is only 31.

[0051] After the raw material oil A is mixed with hydrogen, it is sequentially contacted with a hydrofinishing catalyst and a hydrocracking catalyst to react without intermediate separation. The reaction product is cooled and separated to obtain a hydrogen-rich gas and a liquid phase stream, and the obtained liquid phase stream is obtained by fractional distillation. The loading volume ratio of light naphtha fraction, heavy naphtha fraction and diesel fraction, hydrotreating catalyst and hydrocracking catalyst is 60:40. The reaction conditions are shown in Table 2, and the yield and properties of the main products obtained are shown in Table 3.

[0052] As can be seen from Table 3, the obtained heavy naphtha fraction sulfur and nitrogen content are...

Embodiment 2

[0060] After the raw material oil A is mixed with hydrogen, it is sequentially contacted with a hydrofinishing catalyst and a hydrocracking catalyst to react without intermediate separation. The reaction product is cooled and separated to obtain a hydrogen-rich gas and a liquid phase stream, and the obtained liquid phase stream is obtained by fractional distillation. Light naphtha fractions, heavy naphtha fractions, kerosene fractions, diesel fractions and tail oil fractions, among which the kerosene fractions with a distillation range of 175-230°C are all recycled back to the inlet of the hydrotreating reactor. In terms of weight, the recycled kerosene fraction It accounts for 15% of raw oil A. The loading volume ratio of the hydrorefining catalyst and the hydrocracking catalyst is 60:40. The reaction conditions are shown in Table 4, and the yield and properties of the main products obtained are shown in Table 5. As can be seen from Table 5, the obtained heavy naphtha fracti...

Embodiment 3

[0066] With a kind of light wax oil as raw material oil B, with a kind of catalytic diesel oil as raw material oil C, another kind of catalytic diesel oil as raw material oil D, raw material oil B, raw material oil C and raw material oil D are in weight ratio 41:41: 18 After mixing, the mixed raw material oil E was obtained. The main properties of these raw material oils are shown in Table 6.

[0067] After the raw material oil E is mixed with hydrogen, it is sequentially contacted with a hydrofinishing catalyst and a hydrocracking catalyst without intermediate separation, and the reaction product is cooled and separated to obtain a hydrogen-rich gas and a liquid phase stream, and the obtained liquid phase stream is obtained by fractional distillation The reaction conditions of light naphtha fraction, heavy naphtha fraction, diesel oil fraction and tail oil fraction are shown in Table 7, and the yield and properties of the main products obtained are shown in Table 8. The loadi...

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Abstract

A hydrogenation method for producing high-quality diesel oil and high-quality reforming materials comprises the following steps of: mixing diesel oil and / or a light wax oil material with hydrogen gas, and sequentially contact-reacting with a hydrorefining catalyst and a hydrocracking catalyst without middle separation, cooling the reaction result, and separating to obtain a light naphtha fraction, a heavy naphtha fraction, a kerosene fraction, a diesel oil fraction and a tail oil fraction, wherein the kerosene fraction and / or the tail oil fraction can be directly extracted or partially or completely recycled back to the reaction system. By adopting single-stage once-through process and a non-noble metal catalyst, the invention can produce the reforming materials with high aromatic content and the diesel oil fraction with high cetane number, wherein the yield of the reforming material is larger than 20wt%, and the cetane number of the diesel oil fraction can be improved by more than 15 units. The method provided by the invention has high operation flexibility and can flexibly adjust the technical scheme according to different raw materials and different product scheme requirements.

Description

technical field [0001] The invention belongs to a hydrocarbon oil cracking method for obtaining low-boiling fractions in the presence of hydrogen, more specifically, a hydrogenation method for producing high-quality diesel oil and high-quality reforming raw materials. Background technique [0002] In recent years, the quality requirements for diesel products are getting higher and higher. The new specifications of clean diesel products require low sulfur content, nitrogen content and other impurity content. In addition to stricter restrictions on the sulfur content in diesel, aromatics The content and cetane number put forward further requirements, while the cetane number generally requires not less than 49. [0003] As we all know, catalytic cracking is an important technical means for oil lightening. High-value liquefied gas, gasoline and diesel products can be produced through catalytic cracking with low-value wax oil (which can be blended with some residual oil) as raw ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12C10G47/16
Inventor 蒋东红胡志海张毓莹熊震霖龙湘云辛靖
Owner CHINA PETROLEUM & CHEM CORP
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