Method of vegetable fat recycling from spent bleaching clay

A technology for vegetable oil and waste clay, which is applied in the production of fat oil/fat, refining of fat oil/fat, and fat production, etc., can solve the problems of high safety requirements in the production workshop, high residual moisture in oil, and difficulty in demulsification of the emulsion. The effect of shortening the oil-water separation time, promoting the thermal effect, and shortening the emulsification time

Active Publication Date: 2017-01-11
SANMARK CORP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the process of recovering oil by pressing and centrifugal separation is simple, the recovery of oil is limited, the water content is high, and the residual oil of waste clay is still 20-25%.
Although the oil recovery rate of solvent extraction and dry treatment is high, the process is complicated, the amount of solvent used is large, the recovery is difficult, the safety requirements of the production workshop are high, and secondary pollution and potential safety hazards are easy to occur.
Although the recovery rate of the oil recovered by the aqueous method is high, it is easy to generate a large amount of waste water and cause the structure of the white clay to be damaged, so that it cannot be recycled.
Although the oil recovery rate of the surfactant method is high, it takes a long time, and it is easy to cause further oxidation of the oil, and the resulting emulsion is difficult to demulsify, and there is a lot of residual water in the oil

Method used

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  • Method of vegetable fat recycling from spent bleaching clay
  • Method of vegetable fat recycling from spent bleaching clay
  • Method of vegetable fat recycling from spent bleaching clay

Examples

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Effect test

Embodiment 1

[0029] A method for recovering vegetable oil from waste white clay, using the waste white clay produced by the linseed oil refining process as raw material, the oil content in the waste white clay is 37.1% (w / w), and the water content is 3% (w / w) , the method includes the steps of:

[0030] ① Heat the waste clay to 70°C and centrifuge at 4000r / min for 25min to obtain waste clay and liquid I with an oil content of 25.5% (w / w) after centrifugation;

[0031] ② Crush the centrifuged waste clay to 30 meshes, add water twice the weight of the centrifuged and crushed waste clay, set the ultrasonic power to 400W, microwave power to 450W, and conduct ultrasonic-microwave treatment at 65°C for 9 minutes;

[0032] Then add 0.3% (w / v) composite surfactant, the composite surfactant is 3:1 by weight, mix sodium lauryl sulfate with fatty alcohol polyoxyethylene ether, the power of superemulsification is 270W, 65 ℃ ultrasonic emulsification 7min;

[0033] The power of microwave demulsificat...

Embodiment 2

[0038] A method for recovering vegetable oil from waste white clay, using the waste white clay produced by perilla oil refining process as raw material, the oil content in the waste white clay is 35.3% (w / w), and the water content is 2.8% (w / w) , the method includes the steps of:

[0039] ① Heat the waste clay to 75°C and centrifuge at 3500r / min for 30min to obtain waste clay and liquid I with an oil content of 23.7% (w / w) after centrifugation;

[0040] ② Crush the centrifuged waste clay to 30 mesh, add water twice the weight of the centrifuged and crushed waste clay, set the ultrasonic power to 350W, microwave power to 500W, and conduct ultrasonic-microwave treatment at 65°C for 10 minutes;

[0041] Then add 0.3% (w / v) composite surfactant, the composite surfactant is 4:1 by weight, mix sodium lauryl sulfate with fatty alcohol polyoxyethylene ether, the power of ultrasonic emulsification is 300W, 65 ℃ ultrasonic emulsification 6min;

[0042] The power of microwave demulsifi...

Embodiment 3

[0047] A method for recovering vegetable oil from waste white clay, using the waste white clay produced by the refining process of sunflower oil as raw material, the oil content in the waste white clay is 32.6% (w / w), and the water content is 3.3% (w / w) , the method includes the steps of:

[0048] ① Heat the waste clay to 80°C and centrifuge at 4000r / min for 25min to obtain waste clay and liquid I with an oil content of 21.7% (w / w) after centrifugation;

[0049] ② Crush the centrifuged waste clay to 40 meshes, add water twice the weight of the centrifuged and crushed waste clay, set the ultrasonic power to 400W, microwave power to 500W, and conduct ultrasonic-microwave treatment at 65°C for 7 minutes;

[0050] Then add 0.2% (w / v) composite surfactant, the composite surfactant is 4:1 by weight, mix sodium lauryl sulfate with fatty alcohol polyoxyethylene ether, the power of ultrasonic emulsification is 300W, 65 ℃ Phacoemulsification 7min

[0051] The power of microwave demuls...

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Abstract

The invention relates to a method of vegetable fat recycling from spent bleaching clay and belongs to the field of vegetable fat processing. Based on spent bleaching clay generated in the vegetable oil refining technique as the raw material, the method comprises the steps of (1) centrifugalizing spent bleaching clay to obtain the centrifugalized spent bleaching clay and liquid I; (2) smashing the centrifugalized spent bleaching clay, adding water, performing ultrasound- microwave, then adding surface active agent, undertaking microwave demulsification after ultrasonic emulsification and recycling supernatant liquid of oil to obtain liquid II; (3) mixing and centrifugalizing liquid I and liquid II, recycling upper grease and filtering to obtain the crude oil. The method mentioned in the invention is characterized by simple technique, short time consumption, high efficiency and low cost.

Description

technical field [0001] The invention relates to a method for recovering vegetable oil from waste white clay, belonging to the field of vegetable oil processing. Background technique [0002] In the vegetable oil refining decolorization process, 1-3% activated clay and 0.3-0.7% activated carbon are usually used for decolorization. Due to the difference in decolorization process and equipment, the waste clay after decolorization generally contains 25-40% vegetable oil. In recent years, most oil factories discard, bury or directly mix waste clay with coal as fuel after decolorization, which fails to develop and utilize the oil in clay, resulting in waste of resources and environmental pollution; in addition, oily waste clay and air After contact, it is prone to spontaneous combustion, resulting in a fire hazard. At present, according to the statistics of Oil World, an industry publication in Hamburg, Germany, the global vegetable oil production in 2015 / 16 is expected to be 17...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/00C11B1/02C11B1/10C11B3/00C11B3/16
CPCC11B1/00C11B1/02C11B1/10C11B1/104C11B3/001C11B3/008C11B3/16
Inventor 王缈李燕杰孙婷婷甄成
Owner SANMARK CORP
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