Method for hydro-upgrading coal tar containing heavy distillate

A technology of hydrogenation upgrading and coal tar, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment, etc.

Inactive Publication Date: 2010-01-20
何巨堂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] There is no report about the hydro-upgrading method of coal tar that uses viscosity-reducing hydrocarbons to impr

Method used

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Embodiment

[0036] The hydrogenation unit of coal tar containing heavy fractions has a processing capacity of 32t / h. The properties of coal tar and petroleum-based viscosity-reducing hydrocarbons are shown in Table 1. The method of the present invention is adopted and the operating conditions are shown in Table 3 and Table 4. The pre-catalyst bed is filled with protective agent, metal removal agent, and carbon residue removal agent. The physical and chemical properties and space velocity of each catalyst are shown in Table 2. The inner diameter of the pre-catalyst reactor is 2000 mm, and each agent is loaded sequentially.

[0037] It can be seen from Table 4 that when the viscosity-reducing hydrocarbon is not used, the pre-catalyst bed pressure drop is about 0.48MPa, and the device cannot operate. After the use of viscosity-reducing hydrocarbons, the pressure drop of the pre-catalyst bed is greatly reduced, which greatly increases the void ratio of the bed; at the same time, it can be judg...

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Abstract

The invention relates to a method for hydro-upgrading coal tar containing heavy distillate. The method comprises the following steps: adding visbreaking hydrocarbon which mainly comprises hydrocarbons with a boiling range of between 250 and 550 DEG C into a preposed catalyst bed which is filled with hydrogenation demetallization agent, wherein the visbreaking hydrocarbon can be hydrocarbons obtained through separating effluent of a coal tar hydrogenation upgrading reaction. The coal tar raw material and other hot feeds of the preposed catalyst bed are directly mixed and enter the preposed catalyst bed so as to reduce high temperature section time before contacting the catalyst. The method can reduce pressure drop of the preposed catalyst bed, slow down coking, prolong operation period, and is particularly applicable to hydro-upgrading of coal tar containing high-viscosity heavy distillate.

Description

technical field [0001] The invention relates to a method for hydrogenation and upgrading of coal tar containing heavy fractions; in particular, the invention relates to a method for hydrogenation and upgrading of coal tar containing high-viscosity heavy fractions. Background technique [0002] It is well known that coal tar containing heavy fractions (such as conventional boiling point higher than 370°C), especially coal tar containing heavy fractions with high viscosity, has high metal content, high sulfur content, high nitrogen content, and aromatic coke pitch. High carbon content, high temperature is easy to coke, in the process of hydrogenation upgrading reaction, it is inevitable to use several kinds of catalysts such as protective agent, demetallization agent, carbon residue removal agent, desulfurization agent, denitrification agent, aromatic hydrocarbon saturator, etc. ; Due to the high sulfur content, high nitrogen content, high content of aromatic coke asphaltenes ...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 何巨堂
Owner 何巨堂
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