Heavy oil hydro-upgrading method using catalyst grading

Abstract

The invention discloses a heavy oil hydro-upgrading method using catalyst grading. The method comprises: mixing a heavy oil raw material with hydrogen, passing the mixture through an ebullated bed reactor loaded with solid matters in an up-flow mode, and performing a hydrogenation reaction under a hydrotreating condition. Specifically, the solid matters include two matters of different specifications: stainless steel cages for keeping a fixed bed and particulate ebullated bed catalysts positioned in the space formed by the stainless steel cages. According to the contact order of a hydrocarbon raw material and the catalysts, the hydrogenation activity of the particulate catalysts gradually increases. The method provided in the invention uses the technological characteristics of fixed bed hydrogenation and ebullated bed hydrogenation for reference at the same time, provides greater porosity than the prior art, enhances the dirt-holding capacity of the catalyst bed, and can ensure stable operation of the device, thus being in favor of improving the hydrogenation reaction effects.

Description

technical field [0001] The invention relates to a method for producing light distillate oil from low-quality heavy oil, in particular to a method for producing light distillate oil by organically combining two different operating modes of ebullating bed and fixed bed and the gradation loading mode of ebullating bed catalyst. Background technique [0002] With the rapid development of the global economy, the demand for light and clean fuel oil is increasing rapidly, and the quality of crude oil is getting worse and worse, and the content of heavy components is getting higher and higher. How to effectively use non-renewable petroleum resources to achieve maximum lightness of residue Quality, production of high-value petroleum products is an important issue we are currently facing. [0003] In order to realize the deep processing of heavy oil, the high-viscosity low-quality raw materials are processed into high value-added products, which makes the heavy oil hydrogenation techn...

AI Technical Summary

Problems solved by technology

This will increase investment costs and result in irrational use of resources

Chinese patent CN200910012497.8 introduces that the loading of catalysts with different functions in the same ebullating bed reactor is achieved by controlling the particle size, that is, the catalyst with high activity and small particles is loaded in the upper part of the reactor, and the catalyst with low activity and large particles is loaded in the upper part of the reactor. The lower part of the reactor, but to keep the catalysts with different functions in the designed ideal boiling state requires strict requirements on the nature and composition of the material flow and the actual operation, which increases the difficulty of operation

The combined process only matches the processing means according to the feed requirements of the device and the logistics properties after the reaction, and does not organically combine the characteristics of each process technology to form an overall process plan