A method and system for solvent extraction and solvent recovery of carbonate-rich oil sands

Abstract

The invention relates to a solvent extraction and solvent recovery method and system for oil sand ore rich in carbonate. The method comprises the steps that the oil sand ore rich in carbonate is extracted by adopting a solvent, residues obtained after extraction is mixed with a specific solution, solids in the residues are converted, the residual solvent and asphalt oil are separated out, and after waste liquid and precipitates are subjected to recycling treatment, useful ingredients in the waste liquid and the precipitates are recycled. The technology comprises the operation steps of extracting, distilling, settling, reacting, filtering and the like. According to the technology, not only can the organic ingredients in the oil sand ore rich in carbonate be effectively extracted out, but also the residual solvent and oil in the solids in the solvent extraction process can be recycled; energy sources are saved, and environmental pollution is reduced.

Description

technical field

[0001] The invention relates to a separation method and system for extracting heavy oil from carbonate-rich oil sands by using a solvent extraction method, and simultaneously recovering solvent, residual oil and mineral salt in the residue, belonging to the field of chemical separation and environmental engineering , specifically involving extraction, sedimentation, reaction, desolventization, oil-water separation, filtration, crystallization and other operations. 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 system,...

Examples

Embodiment 1

[0044] A method and system for solvent extraction of oil sands rich in carbonate, the operation steps are as follows:

[0045] (1) The small particles of oil sand ore crushed by the crushing device (the carbonate content accounts for 52.1% of the mineral salt, and the particles are less than 3cm) and toluene are mixed and stirred at 0°C for 30 minutes according to the liquid-solid mass ratio of 1:1;

[0046] (2) The extraction mixture extracted from the extraction device is transported to the solid-liquid separation device for solid-liquid separation, and the supernatant solvent asphalt oil clear liquid is extracted to the solvent recovery device for solvent-asphalt oil separation operation to obtain circulating solvent and asphalt oil products;

[0047] (3) Residual solids (mineral particles and a small amount of solvent oil mixture) at the bottom of the above obtained react with 3mol / L hydrochloric acid solution in the tailings pickling treatment device according to the mass ...

Embodiment 2

[0051] A method and system for solvent extraction of oil sands rich in carbonate, the operation steps are as follows:

[0052] ⑴ Small particles of oil shale ore crushed by the crushing device (carbonate content accounts for 82.1% of the mineral salt, and the particle size is less than 1cm) and naphtha (boiling point below 220°C) are 1:5 at 25 ℃ for mixing and stirring extraction for 20min;

[0053] (2) The extraction mixture extracted from the extraction device is transported to the solid-liquid separation device for solid-liquid separation, and the supernatant solvent asphalt oil clear liquid is extracted to the solvent recovery device for solvent-asphalt oil separation operation to obtain circulating solvent and asphalt oil products;

[0054] (3) Residual solids (mineral particles and a small amount of solvent oil mixture) at the bottom obtained above react with 0.1mol / L sulfuric acid solution in the tailings pickling treatment device according to the mass ratio of 1:10 to ...

Embodiment 3

[0058] A method and system for solvent extraction of oil sands rich in carbonate, the operation steps are as follows:

[0059] (1) The oil sludge small particles crushed by the crushing device (the carbonate content accounts for 10.1% of the mineral salt, and the particles are less than 0.5cm) and kerosene are sealed, mixed and extracted at 55°C for 60 minutes according to the liquid-solid mass ratio of 1:10;

[0060] (2) The extraction mixture extracted from the extraction device is transported to the solid-liquid separation device for solid-liquid separation, and the supernatant solvent asphalt oil clear liquid is extracted to the solvent recovery device for solvent-asphalt oil separation operation to obtain circulating solvent and asphalt oil products;

[0061] (3) Residual solids (mineral particles and a small amount of solvent oil mixture) at the bottom obtained above react with 5mol / L formic acid solution in the tailings pickling treatment device according to the mass rat...

technical field

[0001] The invention relates to a separation method and system for extracting heavy oil from carbonate-rich oil sands by using a solvent extraction method, and simultaneously recovering solvent, residual oil and mineral salt in the residue, belonging to the field of chemical separation and environmental engineering , specifically involving extraction, sedimentation, reaction, desolventization, oil-water separation, filtration, crystallization and other operations. 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 system,...

Examples

Embodiment 1

[0044] A method and system for solvent extraction of oil sands rich in carbonate, the operation steps are as follows:

[0045] (1) The small particles of oil sand ore crushed by the crushing device (the carbonate content accounts for 52.1% of the mineral salt, and the particles are less than 3cm) and toluene are mixed and stirred at 0°C for 30 minutes according to the liquid-solid mass ratio of 1:1;

[0046] (2) The extraction mixture extracted from the extraction device is transported to the solid-liquid separation device for solid-liquid separation, and the supernatant solvent asphalt oil clear liquid is extracted to the solvent recovery device for solvent-asphalt oil separation operation to obtain circulating solvent and asphalt oil products;

[0047] (3) Residual solids (mineral particles and a small amount of solvent oil mixture) at the bottom of the above obtained react with 3mol / L hydrochloric acid solution in the tailings pickling treatment device according to the mass ...

Embodiment 2

[0051] A method and system for solvent extraction of oil sands rich in carbonate, the operation steps are as follows:

[0052] ⑴ Small particles of oil shale ore crushed by the crushing device (carbonate content accounts for 82.1% of the mineral salt, and the particle size is less than 1cm) and naphtha (boiling point below 220°C) are 1:5 at 25 ℃ for mixing and stirring extraction for 20min;

[0053] (2) The extraction mixture extracted from the extraction device is transported to the solid-liquid separation device for solid-liquid separation, and the supernatant solvent asphalt oil clear liquid is extracted to the solvent recovery device for solvent-asphalt oil separation operation to obtain circulating solvent and asphalt oil products;

[0054] (3) Residual solids (mineral particles and a small amount of solvent oil mixture) at the bottom obtained above react with 0.1mol / L sulfuric acid solution in the tailings pickling treatment device according to the mass ratio of 1:10 to ...

Embodiment 3

[0058] A method and system for solvent extraction of oil sands rich in carbonate, the operation steps are as follows:

[0059] (1) The oil sludge small particles crushed by the crushing device (the carbonate content accounts for 10.1% of the mineral salt, and the particles are less than 0.5cm) and kerosene are sealed, mixed and extracted at 55°C for 60 minutes according to the liquid-solid mass ratio of 1:10;

[0060] (2) The extraction mixture extracted from the extraction device is transported to the solid-liquid separation device for solid-liquid separation, and the supernatant solvent asphalt oil clear liquid is extracted to the solvent recovery device for solvent-asphalt oil separation operation to obtain circulating solvent and asphalt oil products;

[0061] (3) Residual solids (mineral particles and a small amount of solvent oil mixture) at the bottom obtained above react with 5mol / L formic acid solution in the tailings pickling treatment device according to the mass rat...

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