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Heavy hydrocarbon hydroprocessing method

A technology for hydrotreating and heavy hydrocarbons, which is applied in refining to remove heteroatoms, etc., can solve the problems of waste of catalyst activity, unbalanced catalysts, and reduced profits of refineries, so as to reduce remanufacturing, reduce operating costs, and save capital construction costs. Effect

Inactive Publication Date: 2005-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The downstream hydrodesulfurization, hydrodenitrogenation and / or hydrocracking catalysts have relatively high activity, and their main functions are to remove impurities such as sulfur and nitrogen in the residual oil feedstock, and to convert the residual oil feedstock, so their The deactivation rate is lower than that of protectants and demetallizers
As a result, the various catalysts mentioned above were deactivated unevenly. When the hydrogenation unit was replaced, hydrodesulfurization, hydrodenitrogenation and hydrocracking were still active, especially hydrodenitrogenation and / or hydrocracking, resulting in catalyst activity waste, reducing refinery profits, this has been proven in industry

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0016] In this embodiment, taking residual oil fixed-bed hydrogenation as an example, the test of the present invention is carried out on a pilot scale residual oil hydrotreating device. The residual oil fixed bed hydrogenation catalysts used in the test are CEN, FZC series heavy and residual oil hydrogenation demetallization catalysts produced by Fushun High-tech Development Zone, ZTN and ZTS series heavy, Hydrodenitrogenation and desulfurization catalysts for residual oil. The sequence of catalyst loading is hydrodemetallization, hydrodesulfurization and hydrodenitrogenation catalysts. Hydrodemetallization, hydrodesulfurization, and hydrodenitrogenation catalysts are loaded in the first, second and third reactors respectively. The hydrodemetallization catalysts used in this test are CEN-5, CEN-6; the protective agents are CEN-2, CEN-4, FZC-16 (transitional protective agent); the hydrodesulfurization catalysts ZTS-01, ZTS-02 , ZTS-03; Hydrodenitrogenation catalyst ZTN-01. ...

Embodiment 4～6 and comparative example 2

[0026] This embodiment and comparative example are used to investigate the equilibrium deactivation of the catalyst, and the raw material oil, catalyst and reaction conditions used are the same as those in Examples 1-3. The target operation is to meet the properties of hydrogenated atmospheric residue: S not more than 0.45w%, N not more than 0.15w%, CCR not more than 4.0w%, and Ni+V not more than 15.0μg / g. The test results are shown in Table-4.

[0027] Example

[0028] It can be seen from Table-4 that the bed pressure drop and reaction temperature of the desulfurization and denitrogenation catalyst bed of the present invention are lower than those of the prior art with the prolongation of operation time. It is more obvious that the pressure drop and temperature increase of the desulfurization catalyst bed in the prior art are much larger than that of the denitrification catalyst bed, showing a trend that the deactivation rate of the desulfurization catalyst is much ...

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Abstract

The invention discloses a method for hydrogenation treatment of heavy hydrocarbons. Residual oil raw materials pass through a protective agent bed, a hydrodemetallization catalyst bed, a hydrodesulfurization catalyst bed, and a hydrodenitrogenation (cracking) catalyst bed in sequence, and The deasphalted oil and / or coker wax oil is introduced after the protectant bed and before the hydrodesulfurization catalyst bed. Compared with the prior art, the method of the present invention effectively utilizes the activity of high-activity catalysts such as hydrodesulfurization, hydrodenitrogenation and / or hydrocracking, so that the functional catalysts of the residual oil hydrotreating unit are evenly deactivated, reducing the Hydrogen catalyst operation cost, and deasphalted oil and coker wax oil are processed, so that they can be processed by downstream catalytic cracking or hydrocracking and other light-weight units, reducing the rebuilding of hydrotreating units. The method of the invention is mainly used for joint hydrogenation treatment of residual oil, deasphalted oil and coker wax oil.

Description

1. Technical field [0001] The invention relates to hydrocarbon hydrogenation treatment technology. More specifically, it is a process involving co-hydroprocessing of different heavy hydrocarbon feedstocks. 2. Background technology [0002] As crude oil becomes heavier and worse, more and more heavy and residual oils need to be processed. The processing of heavy and residual oil is not only to crack it into low-boiling products, such as naphtha, middle distillate and vacuum gas oil, but also to increase their hydrogen-carbon ratio, which requires decarbonization or Hydrogenation method to achieve. The decarbonization process includes coking, solvent deasphalting, heavy oil catalytic cracking, etc.; hydrogenation includes hydrocracking, hydrofining, etc. The hydrogenation method can hydrogenate and convert residual oil, improve the yield of liquid products, and remove heteroatoms therein, and the product quality is good. However, the hydrogenation method is a catalytic pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/04
Inventor 韩保平晋梅武平吴长安
Owner CHINA PETROLEUM & CHEM CORP