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Heavy oil and residuum lightening method

A lightening and residual oil technology, applied in hydrocarbon oil cracking, petroleum industry and other directions, can solve the problems of increasing equipment investment and operating costs, reducing technical economy and other problems, and achieves suppression of coke formation, coke generation, and cost avoidance. excessive effect

Inactive Publication Date: 2004-04-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the partial pressure of hydrogen in the process is also a method to suppress the coke formation reaction of suspended bed hydrocracking, but the increase in equipment investment and operating costs greatly reduces the economical efficiency of the technology

Method used

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  • Heavy oil and residuum lightening method
  • Heavy oil and residuum lightening method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] At room temperature, the diesel fraction and the dispersed catalyst are mixed evenly as the test raw material, in which the diesel is the distilled fraction with a boiling range of 170-350°C after the slag reduction in the sand is hydrogenated in a suspension bed, and the dispersed catalyst is phosphomolybdic acid Nickel aqueous solution catalyst, its addition amount is 150 μ g / g in terms of metal. The above-mentioned diesel fuel mixed with the catalyst is hydrogenated on a small diesel suspended bed hydrogenation device. The operating conditions of the hydrogenation unit are: reaction pressure 10MPa, reaction temperature 370°C, liquid hourly space velocity 0.5h -1 , Hydrogen oil volume ratio (under standard pressure) 600. Among them, the high-pressure hydrogen contains 5v% hydrogen sulfide, and the aromatics in the diesel fraction are hydrogenated and saturated, and are used as a hydrogen donor in the process of hydrocracking of the suspended bed of residual oil.

Embodiment 2

[0028] The dispersed catalyst is a nickel phosphomolybdate aqueous solution catalyst, and its addition amount is 300 μg / g in terms of metal. Other conditions are the same as in Examples.

Embodiment 3

[0030] The dispersed catalyst is a nickel phosphomolybdate aqueous solution catalyst, and its addition amount is 800 μg / g in terms of metal. Other conditions are the same as in Examples.

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Abstract

The present invention discloses a technological process for cleaning heavy oil and residual oil and making them be passed through suspension bed and be undergone the process of hydrocracking treatment to obtain light oil product by using catalyst precursor body. The heavy oil or residual oil can be cut into the fraction whose boiling range is 170-350 deg.C and a narrow fraction part from fraction with 170-350 deg.C by means of distillation equipment, then part of said fraction is mixed with dispersion metal catalyst, and hydrogenated under the condition of hydrogen atmosphere containing hydrogen sulfide and certain diesel oil suspension bed reaction condition to obtain catalyst precursor body, then said catalyst precursor body as hydrogen-supplying agent can be mixed with residuum raw material and high-pressure hydrogen gas, and fed into the residuum suspension hydrogenation reactor so as to obtain the light oil product.

Description

technical field [0001] The invention relates to a method for lightening heavy and residual oils, more specifically, the invention relates to a suspension bed hydrocracking process for heavy and residual oils in which the catalyst precursor can be used as a hydrogen donor. Background technique [0002] Suspension bed hydrocracking treatment of heavy and residual oil has been extensively studied due to its high space velocity and high conversion rate. However, the suspension bed hydrocracking process operated at high conversion often faces the adverse effects of high coke formation. [0003] In order to solve this problem, some processes adopt the process of adding solid powder as the green coke carrier. Chinese patent CN 1035836 proposes to grind ferrous sulfate and coal in oil to make an iron-coal paste additive, which is then mixed with heavy oil for suspension bed hydrogenation. The iron-coal paste additive has only weak hydrogenation activity and cannot effectively inhi...

Claims

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Application Information

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IPC IPC(8): C10G47/02
Inventor 王军张忠清李鹤鸣贾丽董志学贾永忠
Owner CHINA PETROLEUM & CHEM CORP