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Method for cleaning oiled sand and recovering crude oil

A technology for cleaning oil and oil sludge, which is applied to chemical instruments and methods, hydrocarbon oil treatment, sludge treatment, etc., can solve the problems of compound preparations that cannot be reused and high cost, achieve efficient recovery, reduce residual oil rate, high The effect of oil removal efficiency

Active Publication Date: 2020-02-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is costly and its compound preparation cannot be reused

Method used

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  • Method for cleaning oiled sand and recovering crude oil
  • Method for cleaning oiled sand and recovering crude oil
  • Method for cleaning oiled sand and recovering crude oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Mix sodium dodecylbenzene sulfonate (SDBS) / kerosene / n-butanol / sodium chloride / water to obtain oil-in-water winsor type I microemulsion; kerosene 100mL, water 100mL, sodium chloride 0.7g, n-butyl Alcohol 10mL and SDBS 4g;

[0069] The microemulsion prepared in the step (1) is mixed with the Gudao No. 1 oil sludge sand of drying according to the ratio of 10ml: 1g in a container, and the container is sealed;

[0070] Stir the mixture in step (2), the stirring speed is 1000r / min, the temperature is 50°C, and the stirring time is 3h, so that the microemulsion and the oil sludge sand are fully contacted;

[0071] The mixture stirred in step (3) is centrifuged for solid-liquid separation, the centrifugation speed is 4000r / min, the centrifugation time is 10min, after centrifugation, the upper liquid phase is poured out; the liquid phase is a mixture of microemulsion and oil;

[0072] Put the liquid phase poured out in step (4) to stand and separate, so that the oil is at the t...

Embodiment 2

[0079] Mix sodium dodecylbenzenesulfonate (SDBS) / kerosene / n-butanol / sodium chloride / water to obtain oil-in-water winsor type I microemulsion; 100mL of kerosene, 100mL of water, 0.8g of sodium chloride, and Butanol 9mL and SDBS 4g;

[0080] The microemulsion prepared in the step (1) is mixed with the dried oily sludge sand according to the ratio of 10ml: 1g in the container, and the container is sealed;

[0081] Stir the mixture in step (2), the stirring speed is 1000r / min, the temperature is 50°C, and the stirring time is 3h, so that the microemulsion and the oil sludge sand are fully contacted;

[0082] The mixture stirred in step (3) is centrifuged for solid-liquid separation, the centrifugation speed is 4000r / min, the centrifugation time is 10min, after centrifugation, the upper liquid phase is poured out; the liquid phase is a mixture of microemulsion and oil;

[0083] Put the liquid phase poured out in step (4) to stand and separate, so that the oil is at the top, and th...

Embodiment 3

[0090] Mix sodium dodecylbenzene sulfonate (SDBS) / kerosene / n-butanol / sodium chloride / water to obtain oil-in-water winsor type I microemulsion; kerosene 100mL, water 100mL, sodium chloride 0.9g, n-butyl Alcohol 12mL and SDBS 4.5g;

[0091] The microemulsion prepared in the step (1) is mixed in the container according to the ratio of 10ml: 1g with the dried Gudong No. 2 oily sand, and the container is sealed;

[0092] Stir the mixture in step (2), the stirring speed is 1000r / min, the temperature is 50°C, and the stirring time is 3h, so that the microemulsion and the oil sludge sand are fully contacted;

[0093] The mixture stirred in step (3) is centrifuged for solid-liquid separation, the centrifugation speed is 4000r / min, the centrifugation time is 10min, after centrifugation, the upper liquid phase is poured out; the liquid phase is a mixture of microemulsion and oil;

[0094] Put the liquid phase poured out in step (4) to stand and separate, so that the oil is at the top, a...

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Abstract

The invention relates to a method for cleaning oiled sand. The method comprises the following steps: (1) mixing a surfactant, an oil phase, an aqueous phase, an inorganic salt and a co-surfactant so as to prepare a microemulsion; (2) mixing the microemulsion prepared in the step (1) with to-be-cleaned oiled sand in a container, and sealing the container; (3) stirring the mixture in the step (2) soas to achieve elution of oil in the oiled sand through the microemulsion; (4) performing centrifugal separation on the washed mixture in the step (3) so as to achieve solid-liquid separation and obtain oil-removed sand and a liquid phase, wherein the liquid phase is a mixture of the microemulsion and oil; (5) separating the oil from the liquid phase separated in the step (4) so as to obtain the microemulsion which is used once; (6) repeating operation from the step (2) to the step (5) on the microemulsion which is obtained in the step (5) and is used once; and (7) merging the oil separated inthe step (5), and removing water.

Description

technical field [0001] The invention relates to a method for cleaning oil mud sand and recovering crude oil. Background technique [0002] Oil sludge sand mainly comes from the process of oil exploitation, storage and refining, in which there will be heavy oily components such as mechanical impurities, sand, soil, heavy metal salts and asphaltene, which will naturally settle and accumulate at the bottom of the storage tank due to its high specific gravity. A layer of particles of a dark, thick jelly-like substance is formed. Oil sludge sand itself contains a large amount of crude oil. If it is not properly disposed of, it will not only cause a huge loss of crude oil, but also cause serious pollution to the surrounding atmosphere, water quality and soil. Oil sludge sand belongs to the HW08 category in the National Hazardous Waste List. From the perspective of environmental protection and resource recycling, oil sludge sand needs to be recycled, reduced and harmless. [0003...

Claims

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Application Information

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IPC IPC(8): C10G1/00C10G1/04C02F11/00C02F103/10C02F103/36
CPCC10G1/00C10G1/04C02F11/00C02F11/002C10G2300/1003C02F2103/10C02F2103/365
Inventor 刘希明田玉芹宋清新唐延彦郭宏伟史树彬尹相文陈玉丽陈伟王昊
Owner CHINA PETROLEUM & CHEM CORP
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