Modifying method for heavy oil hydrogenating

Abstract

The invention relates to a heavy oil hydrogenating and modifying method, which is characterized in that a heavy oil raw material, heavy cycle oil and a catalyst are uniformly mixed in a premixing device, and are introduced with hydrogen in a liquid phase fluid bed reactor, a hydrotreatment reaction is carried out under the heavy oil hydrotreatment condition, the hydrogenation products is fractionated to light distillate oil and heavy distillate oil in a distillation column, the light distillate oil leads out the apparatus, the heavy distillate oil is circulated to the premixing device and is mixed with the heavy oil raw material; by taking total weight of the catalyst as a reference, the catalyst comprises 2-18wt% of metallic element and 82-98wt% of non metallic element, wherein, by taking the weight of the metallic element as a reference, more than 95wt% of metallic element is V, Ni and VI B family metallic element; by taking the weight of the non metallic element as the reference, more than 95% of non metallic element is C and S, and at least a part of S and the metallic element are existed with a sulfide form of the metallic element. The heavy oil hydrogenating and modifying method is suitable for hydrogenation and conversion of the heavy oil, and is especially suitable for hydrotreatment of inferior heavy oil with high metal, high charcoal residue and high condensed ring substance.

Description

technical field [0001] The invention relates to a method for hydrogenation upgrading of heavy oil, especially inferior heavy oil. Background technique [0002] With the continuous increase of crude oil production, the increasing market demand for light fuel oil and the increasing environmental protection requirements, refineries are paying more and more attention to the technology of residual oil lightening, among which heavy / residual oil slurry bed hydrogenation Upgrading is one of the important ways to lighten heavy / residual oil, so major oil companies are competing to research and develop heavy / residual oil slurry bed hydrogenation technology. [0003] The slurry bed hydrogenation process uses a fine powder or liquid homogeneous catalyst (or additive) mixed with raw oil and then enters the reactor together with hydrogen in an upflow form to complete the hydrothermal cracking reaction. The difference lies in the used Catalysts are different. The early slurry bed hydrogen...

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Problems solved by technology

[0005] In the prior art, the use of high-concentration catalysts is expensive, and because the existing catalysts are easily deactivated, even if the concentration is increased, the improvement of the overall catalytic effect is limited. Therefore, in the prior art, whether it is a solid powder catalyst It is still a homogeneous catalyst, and the concentration of the catalyst in the hydrogenation reactor is relatively low, generally 200-3000μg / g

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