A method for recovering the solvent in the solid residue in the heavy oil solvent extraction process

A technology for solid residue and heavy oil, which is used in solid separation, petroleum industry, processing of hydrocarbon oil, etc., can solve the problem of inability to discharge directly, and achieve the effect of reducing sewage discharge, simple operation and improving economic benefits.

Active Publication Date: 2018-01-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The key problem to be solved by the present invention is how to recover the solvent, that is, the remaining residue after solvent extraction cannot be directly discharged or discarded because of the residual harmful solvent. Harmless treatment of mines

Method used

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  • A method for recovering the solvent in the solid residue in the heavy oil solvent extraction process

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Experimental program
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Effect test

Embodiment 1

[0048] A method for reclaiming the solvent in the solid residue in the heavy oil solvent extraction process, the steps are as follows:

[0049] ⑴Using 20g of solid residue obtained by extracting oil sand with toluene (the solvent content is 10.2%, and the residual oil content is 2%), mix it with 20mL aqueous solution to make a slurry, put it in the pulping device A and mix it, and transport the mixed slurry to the flotation device In device B, carbon dioxide gas is passed into the mixed slurry at a speed of 1.5 L / min, and the diameter of the bubbles is less than 2 mm under the condition of stirring, and flotation is carried out for 1 hour.

[0050] (2) The gas mixture obtained by flotation is exported to the solvent recovery device C for cooling and desolvation treatment at 0°C, and the solvent is recovered, and the obtained desolvated gas is recycled to the flotation device B for use.

[0051] (3) The oil-water foam floating on the upper layer of the flotation device B is rec...

Embodiment 2

[0055] A method for reclaiming the solvent in the solid residue in the heavy oil solvent extraction process, the steps are as follows:

[0056] (1) Use n-heptane to extract 20g of the solid residue obtained from the oil sand (the solvent content is 10.2%, and the residual oil content is 5%), mix it with 20ml of aqueous solution to make a slurry, put it in the pulping device A for mixing, and transport the mixed slurry to the buoy In the filter device B, feed carbon dioxide gas into the mixed slurry at a speed of 1.5L / min, and the bubble diameter is less than 2mm under the situation of stirring, and carry out flotation for 1 hour (stirring speed 180r / min).

[0057] (2) The gas mixture obtained by flotation is exported to the solvent recovery device C for cooling and desolvation treatment at 0°C, and the solvent is recovered, and the obtained desolvated gas is recycled to the flotation device B for use.

[0058] (3) The oil-water foam floating on the upper layer of the flotation...

Embodiment 3

[0062] A method for reclaiming the solvent in the solid residue in the heavy oil solvent extraction process, the steps are as follows:

[0063] (1) 20g of solid residue obtained by extracting oil sands with naphtha (the solvent content is 12.6%, and the residual oil content is 4.9%) is mixed with 20ml of aqueous solution to make a slurry, which is placed in the pulping device A for mixing, and the mixed slurry is transported to the buoy In the filter device B, carbon dioxide gas is passed into the mixed slurry at a speed of 5 L / min, and the diameter of the bubbles is less than 1 mm under the condition of stirring, and the flotation is carried out for 1 hour.

[0064] (2) The gas mixture obtained by flotation is exported to the solvent recovery device C for cooling and desolvation treatment at 0°C, and the solvent is recovered, and the obtained desolvated gas is recycled to the flotation device B for use.

[0065] (3) The oil-water foam floating on the upper layer of the flotat...

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Abstract

The invention relates to a method for recycling a solvent in solid residues in the heavy oil solvent extraction process. A bubbling flotation method is adopted for performing flotation treatment on the solid residues containing the solvent and a small amount of heavy oil, and the residual solvent and heavy oil in the solid residues are recycled. The method includes the steps of slurry preparation, flotation, solvent removal, oil-water separation, solid-liquid separation, liquid-gas circulation and the like. By means of the method, the residual solvent and oil remaining in the solid in the solvent extraction process can be effectively recycled, and gas and an aqueous solution for bubbling can be recycled; energy is saved, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to a separation system and method for recovering residual solvent and heavy oil from the solid residue obtained in the solvent extraction process of heavy oil, which belongs to the field of chemical separation and environmental engineering, and specifically involves pulping, flotation, desolventization, and oil-water separation , liquid-solid separation and liquid-gas circulation and other operations to recover residual solvents and heavy oil. technical background [0002] As a commonly used separation method, solvent extraction technology is widely used in chemical separation, biomedical extraction, environmental restoration, material synthesis, mineral separation and other fields. According to the different extracted substances, the solvents used can be divided into many kinds, such as organic solvents, aqueous solutions, ionic liquids, complexing agents and even supercritical fluids, etc.; classified according to the extraction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/04B03D1/24
CPCB03D1/24C10G1/04C10G2300/1003
Inventor 何林隋红王君妍李鑫钢
Owner TIANJIN UNIV
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