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Method for recovering crude oil by cleaning oil sludge sand

A technology for cleaning oil and oil sludge, which is applied in chemical instruments and methods, the petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems of high cost and non-reusable compound preparations, and achieve efficient recovery, cost saving, and high deoiling efficiency effect

Active Publication Date: 2022-01-25
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 recovering crude oil by cleaning oil sludge sand
  • Method for recovering crude oil by cleaning oil sludge sand
  • Method for recovering crude oil by cleaning oil sludge sand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] 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;

[0070] 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;

[0071] 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;

[0072] 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;

[0073] Put the liquid phase poured out in step (4) to stand and separate, so that the oil is at the t...

Embodiment 2

[0080] 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;

[0081] 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;

[0082] 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;

[0083] 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;

[0084] 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

[0091] 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;

[0092] 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;

[0093] 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;

[0094] 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;

[0095] 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 present invention relates to a kind of method of cleaning oil sludge sand, it comprises the following steps: (1) surfactant, oil phase, water phase, inorganic salt, co-surfactant are mixed and prepared into microemulsion; (2) step (1) ) and mix the microemulsion prepared in the container with the oil sludge sand to be cleaned, and seal the container; (3) stir the mixture in step (2), so that the microemulsion can wash off the oil in the oil sludge sand; (4) The mixture after washing in the step (3) is centrifuged to separate the solid-liquid phase to obtain silt and liquid phase for removing oil, which is a mixture of microemulsion and oil; (5) by the separation in step (4) (6) the microemulsion used once obtained in step (5) repeats the (2)-(5) step; (7) merges The oil part separated in the step (5), and remove moisture.

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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Patent Type & Authority Patents(China)
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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