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Treating method for in-depth dearomatization of diesel oil fraction

A processing method and technology for fractions, which are applied in the field of deep hydrodearomatization of diesel fractions to achieve the effects of enhanced gas-liquid passing capacity, increased contact area, and enhanced interphase transfer process

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Due to the countercurrent operation in the second step, it will be limited by hydrodynamics. In order to prevent the occurrence of liquid flooding, it can only be operated at a lower hydrogen-to-oil ratio, which will have an adverse effect on the deep hydrodearomatization reaction.

Method used

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  • Treating method for in-depth dearomatization of diesel oil fraction

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Embodiment 1

[0026] This example is an implementation of diesel hydrotreating, and the schematic diagram of the operation process refers to the attached figure 1 .

[0027] In this embodiment, the high-gravity reactor in the first reaction zone uses a non-precious metal catalyst, and the fixed-bed reactor in the second reaction zone uses a noble metal catalyst. The main properties of the catalyst are shown in Table 1, and the properties of the raw materials are shown in Table 2.

[0028] Table 1 Physicochemical properties of catalysts.

[0029] project non-precious metal catalyst noble metal catalyst Catalyst Active Components Mo, Ni, W Pt Active component content in terms of oxides, wt% 13 / 6 / 10 0.78 carrier Aluminum oxide USY molecular sieve shape clover bar diameter 3.1 2.0 Pore ​​volume / mL·g -1 0.41 0.39 Specific surface area / m 2 g -1 235 143

[0030] Table 2 Main properties of raw oil.

[0031] Den...

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Abstract

The invention discloses a treating method for in-depth dearomatization of a diesel oil fraction. The method is characterized in that raw oil enters into a hypergravity reactor filled with a non-noble metal catalyst for countercurrent contact with hydrogen to realize desulphurization, denitrification and partial aromatic saturation, and then in-depth dearomatization is carried out in a fixed bed reactor filled with a noble metal catalyst. With the treating method provided by the invention, a stripping separation system in a two-stage process can be omitted, and the content of sulfur and aromatic hydrocarbons in a raw material can be greatly reduced.

Description

technical field [0001] The invention relates to a method for hydrogenation treatment of diesel oil, in particular to a treatment method for deep hydrogenation and dearomatization of diesel fractions. Background technique [0002] With the increasingly stringent environmental regulations, countries around the world have revised diesel specifications, requiring oil refineries to produce environmentally friendly fuels. Class II diesel oil requirements in the "World Fuel Specifications": the sulfur content is not more than 300μg / g, the total aromatic content is not higher than 24%, of which the polycyclic aromatic hydrocarbon content is not higher than 5%, and the cetane index is not lower than 50; III class Requirements for diesel: the sulfur content is not more than 30μg / g, the total aromatic content is not higher than 15%, of which the polycyclic aromatic hydrocarbon content is not higher than 2%, and the cetane index is not lower than 52. These standards will have a profoun...

Claims

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Application Information

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IPC IPC(8): C10G65/08
Inventor 王喜彬曹春清曲涛刘雪玲曾榕辉刘建宇郭蓉
Owner CHINA PETROLEUM & CHEM CORP
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