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Waste white clay recovery and utilization method

A treatment method and technology of waste white clay, which is applied in the field of waste white clay recycling and treatment, can solve the problems of white clay structure damage, energy consumption, etc., and achieve the effect of easing process conditions, reducing safety hazards, and good replacement effect

Active Publication Date: 2019-06-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the separation method of colloidal asphaltenes is mainly based on high-temperature roasting, but high-temperature roasting not only consumes energy, but also destroys the structure of clay itself if the temperature is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Mix 100g of waste clay with 300g of water at 70°C, and after mixing evenly, the obtained material is divided into three layers: solid phase, water phase and oil phase;

[0026] (2) The solid phase obtained after separation in step (1) was mixed with 33mL of treating agent (the treating agent was 20wt% hydrogen peroxide and n-pentadecane, the ratio of hydrogen peroxide and n-pentadecane was 1:1) in Mixing treatment at 80°C, then standing and layering;

[0027] (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 clay is 3.25%, and the activity degree measured by sodium hydroxide titration is 183.

Embodiment 2

[0029] (1) Mix 100g of waste clay with 600g of water at 60°C, and after mixing evenly, the obtained material is divided into three layers: solid phase, water phase and oil phase;

[0030] (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;

[0031] (3) Mix the solid phase obtained after step (2) with 40mL of treating agent (the treating agent is 40wt% hydrogen peroxide, the ratio of hydrogen peroxide to n-heptane is 1:6) at 70°C ;

[0032] (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 waste clay with water, and dry at 90°C to obtain regenerated clay, which contains oil The rate was 2.42%, and the activity measured by sodium hydroxide titration was 170.

Embodiment 3

[0034] (1) Mix 100g of waste clay with 450g of water at 100°C, and after mixing evenly, the obtained material is divided into three layers: solid phase, water phase and oil phase;

[0035] (2) Combine the solid phase obtained after the separation in step (1) with 45mL of treating agent (the treating agent is 35wt% 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;

[0036] (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 4.78%, and the activity measured by sodium hydroxide titration is 179%.

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Abstract

The invention discloses a waste white clay recovery and utilization method, which comprises: carrying out mixing treatment on waste white clay and water, and separating the obtained material through standing to obtain three layers of a solid phase, a water phase and an oil phase; carrying out mixing treatment on the obtained solid phase and a treating agent, standing, removing the uppermost layermaterial, and further carrying out solid-liquid separation to obtain filtrate and waste white clay; and washing the waste white clay, and drying to obtain regenerated white clay. According to the present invention, with the method, oil, colloid and asphaltene can be separated from the waste white clay while the structure of the white clay is not damaged so as to conveniently achieve the subsequentregeneration and reuse of the white clay, other pollutions are not generated during the treatment, and the activity of regenerated white clay is high.

Description

technical field [0001] The invention belongs to the field of petroleum processing, in particular to a method for recycling and utilizing waste clay produced in the production process of refined lubricating oil. Background technique [0002] In the refining process of lubricating oil, the use of activated clay has a strong selective adsorption feature to adsorb pigments and impurities in oil, but clay also adsorbs a large amount of neutral oil while adsorbing pigments. Containing 15% to 45% oil, it is a greyish-brown massive solid. The treatment methods adopted by most manufacturers are pyrolysis, incineration or landfill, which consume energy and waste a large amount of neutral oil. [0003] In the old three production processes of lubricating oil base oil, clay refining is used as supplementary refining of base oil. The main purpose is to remove a small amount of residual colloid, asphaltene naphthenic acid, selective dissolution, water, and mechanical impurities. Most of...

Claims

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Application Information

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IPC IPC(8): B01J20/34C10M177/00
Inventor 孙浩程回军吴巍刘春阳李宝忠王宜迪
Owner CHINA PETROLEUM & CHEM CORP
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