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Method for regenerating waste carclazyte

A technology for waste clay and clay, which is applied in separation methods, filter regeneration, filtration and separation, etc., can solve the problems of affecting the adsorption performance of clay and the surface area of ​​micropores is not restored.

Inactive Publication Date: 2013-11-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found in practice that after the waste clay is regenerated, the specific surface area in the mesopores is restored, but the surface area of ​​the micropores is not restored, which affects the adsorption performance of the clay.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 100 grams of waste clay obtained from supplementary refining of lubricating oil in a refinery in a beaker, add 200ml of petroleum ether with a boiling range of 60-90°C, stir for 20 minutes, filter to obtain the filtrate, and evaporate the filtrate to recover petroleum ether to obtain 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 filtering is grayish white and contains polar substances. Add 100ml of mixed solvent to the clay, the mixed solvent is prepared by petroleum ether and ethanol at a ratio of 80:20, after stirring for 30 minutes, filter to obtain the filtrate and clay, then add 100ml of ethanol to the clay, stir for 20 minutes and then filter to obtain The filtrate and white clay, the white clay is washed twice with water, then filtered and dried to obta...

Embodiment 2

[0025] The same method as in Example 1 was adopted, but ultrasonic waves were used for auxiliary desorption in each extraction process, and the frequency of the ultrasonic waves was 40 kHz. Obtain 24 grams of lubricating base oil, 9 grams of waste oil, and 67 grams of regenerated clay through weighing. After testing, the specific surface area of ​​regenerated white clay is 187.5m 2 / g. The amount of recovered oil increased by 3 grams and the specific surface area increased by 40m 2 / g, indicating that the specific surface area of ​​clay regenerated with ultrasonic-assisted solvent has been restored to a greater extent.

Embodiment 3

[0027] The same method as in Example 1 was adopted, but ultrasonic waves were used for auxiliary desorption in each extraction process, and the frequency of the ultrasonic waves was 70 kHz. Obtain by weighing 24 grams of lubricating oil base oil, 11 grams of waste oil, and 65 grams of regenerated clay. After testing, the specific surface area of ​​regenerated white clay is 201m 2 / g. The amount of reclaimed oil has increased by 2 grams, and the specific surface area has increased by 55m compared to Example 1 2 / g, an increase of 13m compared to Example 2 2 / g, indicating that the specific surface area of ​​the clay regenerated with ultrasonic-assisted solvent has been restored to a greater extent, and it also shows that the increase in the frequency of the ultrasonic wave is beneficial to the recovery of the micropores of the spent clay.

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Abstract

The invention belongs to the fields of petroleum refining and chemical industry and relates to a method for regenerating waste carclazyte. The method is characterized by comprising the following steps of: adopting a non-polar solvent and a polar solvent and the mixed solvent of the two solvents as an extraction solvent, wherein the non-polar solvent is C4-C15 hydrocarbons including alkane, aromatic hydrocarbon and naphthenic hydrocarbon, and the polar solvent is C1-C5 alcohols including methanol, ethanol, propanol, isopropanol, butanol and amyl alcohol; mixing and stirring the extraction solvent with waste carclazyte under the action of ultrasonic waves, desorbing and extracting oil adsorbed in the waste carclazyte, finally, washing the waste carclazyte through water, and filtering and drying the treated carclazyte to recover the surface of the carclazyte, regenerate the activity of the carclazyte and recycle the oil adsorbed by the waste carclazyte.

Description

technical field [0001] The invention belongs to the field of petroleum refining and relates to a method for regenerating waste clay produced in the oil refining process. The method can regenerate waste clay and can be reused, and can recycle oil absorbed in waste clay, which can not only improve the economic benefits of enterprises , and can reduce the environmental pollution caused by waste clay discharge. The International Patent Classification belongs to C10G19 / 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 raw oil is firstly refined by solvent or hydrotreating, 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, improve the stability of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34C10M177/00
Inventor 王延臻许海龙高丽段红玲宋春敏张博张莎李西春张传浩马向荣叶建恒
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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