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Method for separating oil and sands by adopting mixed solvent

A technology for mixing solvent and oil sand, applied in the field of separating bitumen in oil sand, can solve the problems of inability to implement industrialized implementation, difficult to obtain solvent, and high economic cost, and achieve the effect of saving intermediate operation cost, convenient operation and continuous operation.

Inactive Publication Date: 2016-04-06
王萍 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple to operate, but has the following problems: high energy consumption, large water consumption, serious environmental pollution, and is opposed by governments and people all over the world
However, there are also some technical problems to be solved in the traditional solvent extraction technology: efficient and economical solvents are not easy to obtain
[0008] Based on the previous patented technology of using solvent extraction technology to separate oil sands, a common problem encountered is that the economic cost is too high to be implemented industrially. This is why solvent extraction technology has not been able to be put into industrial use so far. reason

Method used

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  • Method for separating oil and sands by adopting mixed solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] use figure 1 The process uses solvents to separate oil sands, and the weight content of bitumen in oil sands is 20%

[0038] 5 kg of oil sand particles crushed to a size of 20mm by the high-temperature water crushing and desander of the spiral drum are sent to the primary stirring tank 3 and mixed with the organic solvent I at 25°C, stirred for 10 minutes, and then sent to the primary suspension separator 4. liquid-solid separation;

[0039] The organic solvent I is a mixture of n-octane and isobutyraldehyde, and the volume ratio is n-octane:isobutyraldehyde=1:5;

[0040] The mass ratio of organic solvent I to oil sand is 2:1;

[0041] The separated extraction phase is sent to the subsequent refining process 24, and the asphalt and organic solvent I are separated, and the organic solvent I is recycled;

[0042] The extraction rate of the obtained oil sand bitumen is 100%, and the solvent recovery rate is 100%.

Embodiment 2

[0044] use figure 1 The device uses a solvent to separate oil sands, and the weight content of asphalt in oil sands is 30%

[0045] 5kg of oil sand particles crushed to a size of 20mm by the high-temperature water crushing and desander of the spiral drum are sent to the primary stirring tank 3 and mixed with the organic solvent I at 20°C, stirred and extracted for 15 minutes, and then sent to the primary suspension separator 4 , for liquid-solid separation;

[0046] The organic solvent I is a mixture of n-octane and isobutyraldehyde, and the volume ratio is n-octane:isobutyraldehyde=1:8;

[0047] The mass ratio of organic solvent I to oil sand is 3:1;

[0048] The separated extraction phase is sent to the subsequent refining process 24, and the asphalt and organic solvent I are separated, and the organic solvent I is recycled;

[0049] The separated residual coarse particle solid is sent to the spiral dryer 7 for desolvation treatment;

[0050] The extraction rate of the o...

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Abstract

The invention provides a method for separating oil and sands by adopting a mixed solvent. The method comprises the following steps: 1, mixing oil sands with an organic solvent I to obtain an organic solvent I and oil sand mixed slurry, wherein the organic solvent is a mixture of alkane and one or more of alcohols or aldehydes; and 2, carrying out primary solid-liquid separation on the mixed slurry obtained in step 1, respectively collecting an extraction phase which is an asphalt and organic solvent I mixture and a raffinate phase which is a primary residual sand and organic solvent I mixture, sending the collected extraction phase to a subsequent purifying process, and extracting asphalt through the purifying process. The method allows the extraction rate of obtained oil sand asphalt to be 100% and the solvent recovery rate to be 100%, has the advantages of convenient sources, easy obtaining and recycling of the solvent, and reduction of environment pollution, and can be used in complete oil-sand separation in the oil sand mine exploitation field.

Description

technical field [0001] The present invention relates to a method of separating bitumen from oil sands. Background technique [0002] Natural oil sand is a transformation product of petroleum, which is formed by the penetration of petroleum crude oil into the ground, in which the light components are evaporated, and then oxidized by oxygen in the air under sunlight, and then polymerized to become asphalt minerals, mainly composed of asphaltene, Colloids such as resins, and a small amount of metal and non-metal and other mineral impurities, natural oil sands are also called tar sands, heavy oil sands, and asphalt sands. [0003] At present, natural oil sands account for 66% of the world's oil reserves, mainly distributed in Canada. At present, Canada's recoverable crude oil is estimated to be 315 billion barrels, second only to Saudi Arabia. Other areas are distributed in the United States, Russia, Venezuela, Indonesia, France, Switzerland, Italy, Trinidad and Tobago, Albania...

Claims

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Application Information

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IPC IPC(8): C10G1/04
Inventor 王平曹鹏
Owner 王萍
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