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Combination method for heavy oil modification

A technology of heavy oil upgrading and combined methods, which is applied in the direction of only multi-stage series refining process treatment, etc., can solve the problems of low value of deoiled bitumen, poor quality of pipeline oil products, and inability to realize high value-added utilization of oil sand bitumen

Pending Publication Date: 2022-07-26
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method produces a large amount of deoiled asphalt, the value of which is low, and the high value-added utilization of oil sands asphalt cannot be realized; the visbroken oil sands asphalt contains unsaturated hydrocarbons, coke, etc. Oil quality is relatively poor

Method used

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  • Combination method for heavy oil modification
  • Combination method for heavy oil modification
  • Combination method for heavy oil modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The heavy oil is treated according to the combined method of the four processes of raw material pretreatment, supercritical water modification, vacuum distillation and solvent deasphalting provided by the invention.

[0048] Using Canadian oil sand bitumen as raw material, remove solid impurities after heating, and mix heavy oil and water to form an oil-water mixture according to the water-oil mass ratio of 0.2:1. The oil-water mixture is heated to 374°C, pressurized to 22.1MPa, and then transported to the supercritical water reactor. Under the action of supercritical water, the heavy oil undergoes a pyrolysis reaction. The reaction time is controlled at 60min, and the reaction product is the modified oil. The modified oil is dehydrated and desalted to obtain hydrothermal modified oil. The hydrothermally upgraded oil is subjected to vacuum distillation to obtain light distillate oil and heavy distillate oil, and the split point of light distillate oil and heavy distilla...

Embodiment 2

[0050] The heavy oil is treated according to the combined method of the four processes of raw material pretreatment, supercritical water modification, vacuum distillation and solvent deasphalting provided by the invention.

[0051] Using Canadian oil sand bitumen as the raw material, after heating, the solid impurities are removed, and the heavy oil and water are mixed according to the water-oil mass ratio of 4:1 to form an oil-water mixture. The oil-water mixture is heated to 600°C, pressurized to 50MPa, and then transported to the supercritical water reactor. Under the action of supercritical water, the heavy oil undergoes a pyrolysis reaction. The reaction time is controlled at 0.1min, and the reaction product is the modified oil. The modified oil is dehydrated and desalted to obtain hydrothermal modified oil. The hydrothermally upgraded oil is subjected to vacuum distillation to obtain light distillate oil and heavy distillate oil, and the split point of light distillate o...

Embodiment 3

[0053] The heavy oil is treated according to the combined method of the four processes of raw material pretreatment, supercritical water modification, vacuum distillation and solvent deasphalting provided by the invention.

[0054] Using Canadian oil sand bitumen as raw material, remove solid impurities after heating, and mix heavy oil and water to form an oil-water mixture according to the water-oil mass ratio of 1:1. The oil-water mixture is heated to 410°C, pressurized to 25MPa, and then transported to the supercritical water reactor. Under the action of supercritical water, the heavy oil undergoes a pyrolysis reaction. The reaction time is controlled within 10 minutes, and the reaction product is the modified oil. and cracked gas, the modified oil is dehydrated and desalted to obtain hydrothermal modified oil. The hydrothermally upgraded oil is subjected to vacuum distillation to obtain light distillate oil and heavy distillate oil, and the split point of light distillate ...

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Abstract

The invention discloses a heavy oil modification combination method, which comprises four processes of raw material pretreatment, supercritical water modification, reduced pressure distillation and solvent deasphalting, the raw material pretreatment process comprises the steps of removing solid impurities in heavy oil, preparing an oil-water mixed solution according to a certain water-oil mass ratio, carrying out a pyrolytic reaction on the heavy oil under the supercritical hydrothermal action, and carrying out vacuum distillation on the heavy oil to obtain the modified heavy oil. The method comprises the following steps of: pyrolyzing macromolecules such as colloid, asphaltene and the like to generate micromolecules, removing partial impurities such as sulfur, nitrogen, nickel, vanadium and the like in heavy oil, distilling out light distillate oil with good properties through a reduced pressure distillation process for direct oil blending, carrying out solvent deasphalting treatment on heavy distillate oil with poor properties, and separating the heavy distillate oil into light deasphalted oil, heavy deasphalted oil and asphalt. The combined method disclosed by the invention can be used for effectively realizing light conversion of the heavy oil, removing impurities in the heavy oil and producing an oil product meeting pipeline transportation requirements, a catalytic cracking or hydrocracking raw material and a high-quality road asphalt raw material.

Description

technical field [0001] The invention relates to the technical field of heavy oil upgrading, in particular to a combined method for pre-processing raw materials, and using multiple processes of supercritical water upgrading, vacuum distillation and solvent deasphalting to carry out heavy oil upgrading. Background technique [0002] With the rapid development of the global economy, the demand for petroleum resources continues to increase, and the light petroleum resources are decreasing day by day. The efficient development and utilization of heavy crude oil, oil sand asphalt, residual oil and other heavy oil resources is of great significance to alleviate the energy security crisis. Due to the high density, high viscosity, high freezing point and high content of heavy components, heavy oil is difficult to be transported and processed like conventional crude oil. It needs to be lightened before being transported to refineries. Lightweight processing technology is the key techn...

Claims

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Application Information

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IPC IPC(8): C10G53/04
CPCC10G53/04C10G2300/4006C10G2300/4012C10G2300/202C10G2300/205C10G2300/206
Inventor 吴青李福双辛利臧甲忠冯钰润刘凯隆唐成义张雪梅
Owner CHINA NAT OFFSHORE OIL CORP
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