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Method for regenerating and recovering oil refining waste clay

A technology of waste clay and oil refining process, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of low oil yield, structural damage, expensive machinery and equipment, etc.

Active Publication Date: 2009-05-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two methods for recycling waste clay. One is to use high-pressure pressing to squeeze out the oil, and then package it for landfill. This method does not recycle waste clay, and the oil can only be squeezed out by pressing. About half of it is produced, most of the oil is still in the clay, and the mechanical equipment used is expensive and easy to damage; another method is the boiling method, that is, adding the waste clay to hot water, adding alkaline substances such as sodium carbonate and sodium hydroxide, etc. The oil in the waste white clay can be boiled out. This method produces a large amount of waste water, and the oil yield is not high. Generally, only two-thirds of the oil in the waste white clay can be extracted. The waste white clay cannot be regenerated, and the structure is destroyed. Therefore the law has been eliminated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Weigh 100 grams of waste clay obtained from supplementary refining of a refinery lubricating oil in a beaker, add 200ml of petroleum ether with a boiling range of 60-90°C, stir for 20 minutes, filter and remove the petroleum ether solution, and evaporate the petroleum ether solution to recover petroleum ether. The recovered petroleum ether can be reused, and lubricating oil base oil can be obtained in addition. The oil is light in color and transparent, which is basically the same as the lubricating oil base oil produced by the refinery; the white clay obtained by filtration is gray in color and contains polar substances. Now, add 100ml of mixed solvent to the white clay, the mixed solvent is prepared by sherwood oil and ethanol in a ratio of 80:20, after stirring for 30 minutes, filter to obtain the mixed solvent and white clay, then add 100ml of ethanol to the white clay, stir for 10 Minutes later, filter to obtain ethanol and clay, wash the clay twice with water, then...

Embodiment 2

[0013] Weigh 100 grams of waste clay in Example 1 in a beaker, add 200 ml of petroleum ether with a boiling range of 90-120° C., stir for 30 minutes, then filter and remove the petroleum ether solution, and evaporate the petroleum ether solution to remove petroleum ether to obtain recovered Petroleum ether can be reused, and lubricating oil base oil is obtained in addition. This oil is light in color and transparent, and is basically the same as the lubricating oil base oil produced by the refinery; add 100ml of mixed solvent to the white clay obtained by filtration, and the mixed solvent is made of petroleum ether. Prepared with ethanol at a ratio of 90:10. After stirring for 30 minutes, filter to obtain the mixed solvent and clay, then add 100ml of ethanol to the clay, stir for 10 minutes, filter to obtain ethanol and clay, wash the clay twice with water, and then filter , drying to obtain regenerated clay, and the ethanol solution obtained by filtering is mixed with the mixe...

Embodiment 3

[0015] Take by weighing 100 grams of waste clay in Example 1 in a beaker, add 300 ml of n-heptane, stir for 30 minutes, then filter to remove the n-heptane solution, and remove the n-heptane by evaporating the n-heptane solution to obtain recovered n-heptane , can be used repeatedly, and lubricating oil base oil is obtained in addition, and this oil color is light, transparent, and the lubricating oil base oil that oil refinery produces is basically identical; Add 100ml mixed solvent in the white clay that filter obtains, and mixed solvent is by n-heptane and Isopropanol is prepared according to the ratio of 90:10. After stirring for 30 minutes, filter to obtain the mixed solvent and clay, then add 80ml of isopropanol to the clay, stir for 10 minutes, filter to obtain isopropanol and clay, and wash the clay with water for two times, and then filtered and dried to obtain regenerated clay, and the filtered isopropanol solution was mixed with the mixed solvent solution, evaporated...

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Abstract

The invention provides a method used for recovering waste clay which is produced by refining lubricant from refinery. The method is characterized in that a non-polar solvent, a polar solvent and a mixed solvent of the non-polar solvent and the polar solvent are used to extract the oil adsorbed in the waste clay; lubricant-based oil, colloid, asphaltene, aromatic hydrocarbon, and the like adsorbed in the waste clay can be completely extracted, so as to regenerate the performance of the clay, to repeatedly use the clay and to gain the non-ideal component of the lubricant base oil and the lubricant. The method is also applicable to the waste clay which is produced by refining other oil clay from the refinery, and the regeneration of the waste clay which is produced by refining the grease in grease industry.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and relates to a method for regenerating and recovering waste clay produced in the oil refining process. The method can regenerate and reuse the waste clay, and can recover the oil absorbed in the waste clay, which can not only improve the economy of the enterprise Benefits, and can reduce environmental pollution caused by waste white clay discharge. The International Patent Classification belongs to C10G 19 / 00. Background technique [0002] In the process of petroleum processing, it is necessary to remove the non-ideal components in the lubricating oil to improve the oxidation stability of the lubricating oil. Generally, the wax oil is firstly refined by solvent or hydrogenation, and then supplemented with white clay. The purpose of supplementary refining of white clay is to remove a small amount of nitrogen compounds, polycyclic aromatic hydrocarbons, colloids, etc. in the lubricating oil, im...

Claims

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Application Information

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IPC IPC(8): C10G19/00
Inventor 王延臻宋彩霞
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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