Hydro-upgrading method for production of low-condensation point motor fuel from biolipid

Abstract

The invention relates to a hydro-upgrading method for production of a low-condensation point motor fuel from biolipid. The method comprises the following steps that: biolipid is used as raw oil, and the raw oil and hydrogen pass through a first-stage hydrogenation reaction zone, wherein the first-stage hydrogenation reaction zone comprises at least two hydrogenation catalyst beds in which the content of a hydrogenation active component successively increases; a material flow generated in first-stage hydrogenation is separated, obtained hydrogen-rich gas is recycled, and obtained liquid enters into a second-stage hydro-upgrading reaction zone; and a material flow generated in second-stage hydrogenation is separated, obtained side hydrogen is recycled, and an obtained liquid product is subjected to fractionation so as to obtain naphtha and low-condensation point diesel oil; wherein in a reaction state, the active component of all the hydrogenation catalysts is one or more selected from the group consisting of W, Mo, Ni and Co in a reduction state. Compared with the prior art, the method provided by the invention can produce the low-condensation point motor fuel while guaranteeing activity stability of the catalysts and long-period stable running of an apparatus.

Description

technical field [0001] The invention relates to a hydrogenation treatment method, in particular to a hydrogenation upgrading method for directly producing low freezing point motor fuel by using biological oil as raw material oil. Background technique [0002] At present, the energy on a global scale mainly comes from fossil energy, among which petroleum is the most important source of motor fuel. Petroleum is a non-renewable energy source. Not only are the resources increasingly depleted, but also the quality and inferiority are intensifying. The continuous development of the world economy and increasingly stringent environmental protection regulations require the production of a large amount of light and clean fuels, which require the existing refining technology to be improved and improved. While improving, new oil substitutes are added to produce products that meet the requirements at the lowest cost. [0003] As a renewable resource, bio-oil has been widely valued in th...

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Problems solved by technology

[0005] EP1741767 and EP1741768 disclose a method for producing diesel fractions from animal and vegetable oils, mainly animal and vegetable oils first undergo hydrogenation, and then pass through an isomerization catalyst bed to obtain low-condensation diesel components, but due to the hydrogenation Water is generated during the process, which has a very adverse effect on the isomerization catalyst, and the device cannot run stably for a long period of time

[0006] In the bio-oil hydrogenation process including the above method, one of the main problems encountered is that the carbon deposition in the catalyst bed causes the operation cycle to be shortened, and the catalyst needs to be frequently shut down to replace it.

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