Method for extracting oil in spent bleaching clay by ultrasonic assisted isohexane

An ultrasonic-assisted, isohexane technology is applied in the direction of recycling fat oil/fatty acid from waste materials, producing fat, and recycling fatty substances. It can solve problems such as low oil yield, expensive mechanical equipment, and hidden dangers in production and life, and reduce Effects of production cost, increase of industrial profit, and shortening of production time

Inactive Publication Date: 2016-02-03
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The treatment method of most oil factories is to mix it with coal to make fuel or to bury it and discard it. This kind of treatment is not only a waste of resources, but also causes environmental problems. Spontaneous combustion often occurs, which brings huge safety hazards to production and life
[0003] At present, there are two common ways to regenerate 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 pressing method can only extract About half of the oil is sque

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0009] Specific embodiment 1: The method for extracting grease from waste clay with ultrasonic-assisted isohexane is realized through the following steps: 1. Take a certain amount of grease decolorization waste white, and mix it with a certain amount of isohexane evenly for a period of time; 2. Use 1 : 4 to 1:8 (w:v) ratio of solid to liquid, when the ultrasonic temperature is 45-65°C, use ultrasonic power 200-400W, ultrasonic extraction time is 20-40min; 3. Centrifuge the obtained mixture Filtration treatment, the supernatant liquid is the extracted oil, and the residue obtained by filtration is the waste clay after oil extraction; 4. The obtained deoiled waste clay is washed with a certain amount of water to remove isohexane, and it is washed three times in total, and dried after washing for further use. Five, the isohexane solvent in the leaching solution is recovered.

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ratio of material to liquid in Step 2 is 1:5-1:7. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the ultrasonic temperature in step 2 is 50-60°C. Other steps are the same as in the first embodiment.

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Abstract

The invention provides a method for extracting oil in spent bleaching clay by ultrasonic assisted isohexane. Under the oscillation and cavitation action of ultrasonic waves, oil adsorbed in the spent bleaching clay is fully extracted in the isohexane, thus fulfilling the aim of increasing the oil extraction rate. The method comprises the following steps: dispersing the spent bleaching clay into the isohexane, uniformly mixing, extracting the oil adsorbed in the spent bleaching clay into the isohexane under the synergistic action of ultrasonic treatment, heating and stirring, performing washing and centrifugal solid-liquid separation on an oil-removed bleaching clay system obtained by filtration, and drying and grinding obtained solid products, thus obtaining regenerated bleaching clay. According to the method, the oil in the oil spent bleaching clay can be extracted to the maximum extent, so that the extraction time is shortened, and the maximum oil extraction rate is 97 percent; meanwhile, after being regenerated, the spent bleaching clay can be used for brickmaking by filling and repeatedly used, so that the aim of recycling economy is fulfilled. The method has an important significance for oil and fat refining.

Description

Technical field: [0001] The invention relates to the field of oil processing technology, in particular to the recovery of oil from oil-containing waste clay produced after oil refining and the reuse of waste clay, which improves the economic benefits of enterprises and reduces environmental pollution caused by the discharge of waste clay. Background technique: [0002] After industrially using activated clay to adsorb and decolorize oil, due to the physical properties of activated clay, limitations of equipment and technology, there are about 20% to 48% of oil in the decolorized waste clay. The treatment method of most oil factories is to mix it with coal to make fuel or to bury it and discard it. This kind of treatment is not only a waste of resources, but also causes environmental problems. Spontaneous combustion will often occur, which brings huge safety hazards to production and life. [0003] At present, there are two common ways to regenerate waste clay. One is to use...

Claims

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Application Information

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IPC IPC(8): C11B13/00
CPCY02W30/74
Inventor 江连洲于殿宇梁宝生王立琦任运宏杜华楠周爽王文华齐晓芬
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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