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Method for reducing oil content of spent bleaching clay

A technology for waste clay and oil content, which is applied in separation methods, chemical instruments and methods, and petroleum industry, etc., can solve the problems of failure to achieve resource recovery, collapse of clay porous structure, and influence on regeneration effect, achieve good economic benefits, and is conducive to The effect of regeneration and process conditions alleviation

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

AI Technical Summary

Problems solved by technology

Clay begins to lose crystallization water when heated above 300°C, and its structure changes. In addition, the introduction of concentrated sulfuric acid will also cause the collapse of the porous structure of clay, both of which will affect the regeneration effect; more importantly, the oil absorbed by clay is destroyed. Burned, no recycling of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Mix 500g of waste clay, 1400g of water and a pretreatment agent at 75°C. The pretreatment agent is composed of rhamnolipid and petroleum sulfonate, and the dosages are 0.85g and 5.25g respectively. After standing still, the material is divided into three layers: solid phase, water phase and oil phase; among them, the COD / BOD of water is 0.42 after measurement;

[0030] (2) The solid phase obtained after separation in step (1) was mixed with 160mL of treating agent (the treating agent was 25wt% hydrogen peroxide and n-tridecane, the ratio of hydrogen peroxide and n-tridecane was 1:2) in Mixing treatment at 80°C, then standing and layering;

[0031] (3) After removing the colloidal asphaltenes in the uppermost layer from the material obtained in step (2), further filter and separate to obtain the filtrate and waste clay, wash the waste clay with water, and then dry it at 80°C to obtain regenerated clay. The oil content of white clay is 2.75%.

Embodiment 2

[0033] (1) Mix 500g of waste clay and 2800g of water at 65°C. The pretreatment agent is composed of rhamnolipid and petroleum sulfonate, and the dosage is 1.20g and 7.5g respectively. After mixing evenly, the obtained material is allowed to stand Afterwards, it is divided into three layers: solid phase, water phase and oil phase. Among them, the water has been measured, and the COD / BOD is 0.48;

[0034] (2) Mix the solid phase obtained in step (1) with water at 70°C, and the material obtained after mixing evenly is divided into three layers: solid phase, water phase and oil phase;

[0035] (3) Mix the solid phase obtained after step (2) with 200mL of treating agent (the treating agent is 35wt% hydrogen peroxide, the ratio of hydrogen peroxide to n-heptane is 1:6, mix and treat at 80°C ;

[0036](4) After removing the colloidal asphaltenes in the uppermost layer from the material obtained in step (3), further filter and separate to obtain the filtrate and waste clay, wash the ...

Embodiment 3

[0038] (1) Mix 500g of waste clay and 2100g of water at 100°C. The pretreatment agent is composed of rhamnolipid and petroleum sulfonate, and the dosage is 0.68g and 9.0g respectively. After mixing evenly, the obtained material is allowed to stand After that, it is divided into three layers: solid phase, water phase and oil phase; among them, the water has been measured, and the COD / BOD is 0.38;

[0039] (2) Combine the solid phase obtained after separation in step (1) with 225mL of treating agent (the treating agent is 30wt% hydrogen peroxide and n-decane, the ratio of hydrogen peroxide and n-decane is 1:5) at 75°C Down mixing process, then static layering;

[0040] (3) Remove the colloidal asphaltenes in the uppermost layer from the material obtained in step (2), and further filter and separate to obtain the filtrate and waste clay. The waste clay is washed with water and dried at 95°C to obtain regenerated clay. The regenerated clay is The oil content is 4.38%.

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Abstract

The invention discloses a method for reducing the oil content of spent bleaching clay. The method comprises the following steps: mixing spent bleaching clay, a pretreatment agent and water, and performing standing treatment on the mixture to separate the material into a solid phase, a water phase and an oil phase; mixing the obtained solid phase with the treatment agent, performing standing treatment, removing the material at the upper layer, further carrying out solid-liquid separation to obtain a filtrate and spent bleaching clay, washing the spent bleaching clay, and drying the spent bleaching clay to obtain regenerated bleaching clay. According to the method for reducing the oil content of the spent bleaching clay, grease, colloid and asphaltene in the spent bleaching clay can be separated out and the structure of the spent bleaching clay is not damaged, so that subsequent regeneration and repeated utilization of the spent bleaching clay are facilitated, no other pollution is generated in the treatment process, and the activity of the regenerated bleaching clay is high.

Description

technical field [0001] The invention belongs to the field of petroleum processing, in particular to a treatment method for waste clay produced in the production process of refined lubricating oil. Background technique [0002] In the production of lubricating oil, it is necessary to go through the refining process of removing undesired components, or the hydrogenation treatment of chemical conversion of undesired components, in order to improve the viscosity index of base oil and meet the requirements of its viscosity-temperature performance; Dewaxing process, or the hydrodecondensation process of cracking and isomerizing wax hydrocarbons to lower the freezing point of base oil and meet low temperature fluidity requirements. As the last process, the lubricating clay replenishment and refining device is to mix the lubricating oil with a certain amount of clay at a certain temperature and time to process various solvent refining and solvent dewaxing lubricating oils, and remov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/12C10M175/00
CPCB01J20/3433B01J20/12C10M175/0008C10M175/0083Y02W30/74
Inventor 孙浩程回军刘春阳李宝忠王宜迪
Owner CHINA PETROLEUM & CHEM CORP
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