Hydrogenation combination method for producing low-condensation-point diesel oil

A technology with low freezing point and diesel oil, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems of short operation period and achieve the effect of lowering the freezing point

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

At the same time, when producing low-condensing-point diesel fractions, there are also

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  • Hydrogenation combination method for producing low-condensation-point diesel oil
  • Hydrogenation combination method for producing low-condensation-point diesel oil

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[0028] The method of the present invention is specifically as follows: using one or more mixed oils in the bio-grease as the raw material oil, under the condition of hydrotreating, the raw material oil and hydrogen pass through the first reactor comprising the reactor operated at low temperature and the reactor operated at high temperature. In the first reaction zone, the obtained hydrotreated product stream is recycled in the gas separated by the high-pressure separator, and the liquid fraction obtained can also be discharged from the system; the diesel raw material is mixed with hydrogen and enters the second reaction zone containing hydrorefining, and the obtained The gas obtained from the hydrofinishing product stream separated by the high-pressure separator is recycled, and the liquid fraction obtained can also be discharged from the system; the liquid fraction in the first reaction zone is mixed with the liquid fraction in the second reaction zone, and then mixed with hydr...

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Abstract

The invention relates to a hydrogenation combination method for producing low-condensation-point diesel oil. The hydrogenation combination method comprises the steps that firstly, under the condition of hydrogenation, biolipid and recycle hydrogen are mixed and pass through a hydrotreating reaction zone, the raw diesel oil and the recycle hydrogen are mixed and pass through a hydrofining reaction zone, the liquid obtained by separating a hydrotreating generated material flow and the liquid obtained by separating a hydrofining product are mixed and then enter a hydro-upgrading reaction zone at least comprising hydrogenation catalysts with isomerization performance, and the liquid obtained by separating a hydro-upgrading generated material flow is continuously fractionated, thus obtaining naphtha and high-quality low-condensation-point diesel oil products, wherein in the reaction state, the hydrogenation active components of the hydrogenation catalysts used in the hydrotreating reaction zone are Pt and/or Pd in the reduction state. Compared with the prior art, the method has the advantages that not only can the storage stability of the biolipid as fuel oil be effectively improved but also the high-quality low-condensation-point clean diesel oil can be directly produced.

Description

technical field [0001] The invention belongs to a processing method of renewable energy, and relates to a hydrogenation method, in particular to a hydrogenation combined method for directly producing low-condensing-point diesel oil by using bio-oil and diesel fractions as raw material oil. Background technique [0002] At present, the global energy mainly comes from fossil energy, including coal and petroleum, and petroleum is the most important source of motor fuel. Petroleum is a non-renewable energy source, not only is the resource increasingly depleted, but also the degree of heaviness and inferiority is intensifying. With the continuous development of the world's economy and increasingly stringent environmental protection regulations, the demand for light and clean fuels in various countries is very strong, all of which require the improvement and improvement of the existing refining technology while adding new oil substitutes, and at the lowest cost Cost to produce pr...

Claims

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Application Information

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IPC IPC(8): C10G65/02
Inventor 刘涛吴锐李宝忠韩照明郭蓉曾榕辉
Owner CHINA PETROLEUM & CHEM CORP
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