Method for separating and extracting crude oil from oil sand

A technology for extracting oil and crude oil, which is applied in the petroleum industry and the preparation of liquid hydrocarbon mixtures. It can solve the problems of complex solvent recovery process, low processing capacity, and low crude oil quality, and achieve excellent economic and environmental benefits and simple discharge treatment. , The effect of low solid phase oil content

Inactive Publication Date: 2013-05-22
天津市朗敦环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that the ultra-fine solid phase cannot be separated, resulting in poor oil quality, and there are problems such as complicated solvent recovery process and high cost.
The problems of this method are high energy consumption, complicated nuclear reaction facilities, and problems in popularization and application.
The problems of this method are high energy consumption, low processing capacity and low economic benefit
[0013] At present, the "hot alkali water washing" method is widely used, such as: "Chemical Science and Technology" 2008.16 (6), "Xinjiang Oil Sand Washing Separation and Oil Extraction Technology Research" published by Xu Xiuqiang; Experimental Research on Sand Hot Alkali Washing and Separation "Volume 22, Issue 4, the existing problems are high energy consumption, high reagent cost, low quality of crude oil produced, polluted tailings, and high environmental cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In terms of mass ratio, the oil content of the oil sand sample is 6%w / w (6% oil content is the lowest grade oil sand ore), the water content is 8%w / w, and the sediment or mechanical impurities are 86%w / w

[0030] (a) Add diesel oil accounting for 5% by volume to the oil sand and fully stir and mature it;

[0031] (b) add water and emulsifier to the treated oil sand, fully emulsify and disperse to become a suspension with water as the dispersed phase; the volume of water added is 5 times the volume of the treated oil sand; the emulsifier is polyacrylonitrile hydrolyzate ( Ammonium salt) 4% aqueous solution, the added volume accounts for 5% of the treated oil sands volume;

[0032] (c) adding sulfuric acid in the suspension to adjust its pH value to 3;

[0033] (d) add the saturated solution of ferrous sulfate in the acid suspension to make the concentration of ferrous sulfate in the suspension be 3.5 grams per liter, stir;

[0034] (e) Adding hydrogen peroxide in the u...

Embodiment 2

[0039] In terms of mass ratio, the oil content of the oil sand sample is 12%, the water content is 8%, and the sediment or mechanical impurities are 80%.

[0040] (a) Add No. 120 solvent oil that accounts for 10% by volume in the oil sand and fully stir and mature it;

[0041] (b) add water and emulsifier to the treated oil sand, fully emulsify and disperse to become a suspension with water as the dispersed phase; the volume of water added is 6 times the volume of the treated oil sand; the emulsifier is polyacrylonitrile hydrolyzate ( Sodium salt) 4% aqueous solution, the added volume accounts for 5% of the treated oil sands volume;

[0042] (c) Utilize filter centrifuge to remove large particle size solid phases such as large particle size quartz sand in the suspension;

[0043] (d) the liquid phase separated by the filter centrifuge is adjusted to 4 with sulfuric acid;

[0044] (e) adding ferrous sulfate powder in the acidic suspension makes the concentration of ferrous su...

Embodiment 3

[0050] In terms of mass ratio, the oil content of oil sand samples is 15%w / w, the water content is 5%w / w, and the sediment or mechanical impurities are 80%w / w

[0051] (a) adding mineral spirits accounting for 11% by volume to the oil sands and fully stirring and aging;

[0052] (b) Add water and emulsifier to the oil sand after treatment, and fully emulsify and disperse to become a suspension with water as the dispersed phase; the volume of water added is 10 times the volume of oil sand after treatment; the emulsifier is washing powder, and the addition amount accounts for 0.5% by volume of treated oil sands;

[0053] (c) adding sulfuric acid in the suspension to adjust its pH value to 5;

[0054] (d) adding ferrous sulfate powder in the acidic suspension makes the concentration of ferrous sulfate in the suspension be 4 grams per liter, and stir evenly;

[0055] (e) Add hydrogen peroxide to the uniformly stirred acid suspension to make the concentration of hydrogen peroxide...

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PUM

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Abstract

The invention discloses a method for separating and extracting crude oil from oil sand. The method comprises the following steps of: (1) adding an organic solvent to the oil sand, fully stirring and curing so as to reduce the viscosity and specific gravity of the crude oil in the oil sand; (b) adding water and an emulsifying agent to the treated oil sand, and fully emulsifying and dispersing to form suspension liquid with water as a dispersion phase; (c) adding sulfuric acid to the suspension liquid so as to adjust the pH value of the suspension liquid till the suspension liquid is acid; (d) adding a saturated solution or powder of ferrous sulfate to the acid suspension liquid so that the concentration of the ferrous sulfate in the suspension liquid is 3.5-5g / L; (e) adding hydrogen peroxide to the uniformly stirred acid suspension liquid so that the concentration of hydrogen peroxide in the suspension liquid is 8-15ml / L and fully stirring; and (f) realizing three-phase separation of oil, water and sand by a physical method. The thorough recovery of the crude oil can be realized by using the method for treating dirty oil sand; and according to the method, the treatment energy consumption is very low, and no lots of industrial wastewater is generated.

Description

technical field [0001] The invention relates to a process for separating and extracting crude oil in oil sands, in particular to a separation method for a mixture of crude oil, water and sediment. Background technique [0002] Traditional oil sand treatment methods include: hot alkaline water washing, solvent extraction, pyrolysis and dry distillation, etc., but there are problems such as high energy consumption, high treatment costs, and high environmental protection costs, which seriously restrict the development of the oil sands industry. [0003] The Chinese patent application number 200810151054.2 discloses "a method for treating oilfield sludge". The components are vaporized; transported to the spray cooling device through pipelines, cooled by water spray and liquefied; water and oil enter the oil-water separation device for oil-water separation to obtain light oil products, and the cooling water is recycled; non-condensable gas is used as pyrolysis The fuel of the fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
Inventor 程秀
Owner 天津市朗敦环保科技有限公司
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