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Refining method for recovered gutter oil

A refining method and gutter oil technology, applied in the direction of fat oil/fat refining, recovery of fat oil/fatty acid from waste materials, recycling technology, etc., can solve the problems of complicated preparation methods and low quality, achieve good decolorization, easy operation, and improved color effect

Inactive Publication Date: 2017-12-01
安庆华威油脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recycled waste oil can be used to make soap, bio-fuel, etc., but the current refined waste oil is not of high quality and the preparation method is complicated

Method used

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  • Refining method for recovered gutter oil
  • Refining method for recovered gutter oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A refining method for reclaiming waste oil, comprising the steps of:

[0025] S1, take gutter oil to remove solid residue, then centrifuge and filter to obtain clear liquid oil;

[0026] S2, take S1 to obtain clear liquid oil, adjust pH, heat up, add phospholipase A2, keep warm and stir, heat up, centrifuge to take the upper oil phase to obtain degummed oil;

[0027] S3, adding a chemical decolorizer to the degummed oil obtained in S2, heating up, insulated and stirred, then adding diatomaceous earth and activated carbon, heating up, insulated and stirred, and filtering to get the filtrate;

[0028] S4. Add glycerin to the filtrate obtained in S3, heat up, keep warm and stir to obtain refined waste oil.

Embodiment 2

[0030] A refining method for reclaiming waste oil, comprising the steps of:

[0031] S1. Take gutter oil to remove solid residues, and then centrifuge and filter to obtain clear liquid oil. The centrifugation speed is 10000r / min, the centrifugation time is 10min, the filtration temperature is 80°C, and the nano-overfrequency vibration module is used for filtration;

[0032] S2. Take the supernatant oil obtained from S1, adjust the pH=6, heat up to 50°C, add phospholipase A2, heat and stir for 4 hours, heat up to 80°C, and centrifuge to take the upper oil phase to obtain degummed oil;

[0033] S3. Add a chemical decolorizer to the degummed oil obtained in S2, heat up to 70° C., heat and stir for 20 minutes, then add diatomaceous earth and activated carbon, heat up to 85° C., heat and stir for 15 minutes, and filter to get the filtrate;

[0034] S4. Add glycerin to the filtrate obtained in S3, raise the temperature to 230° C., keep stirring for 2.5 hours, and cool to room temper...

Embodiment 3

[0036] A refining method for reclaiming waste oil, comprising the steps of:

[0037] S1. Take gutter oil to remove solid residue, and then centrifuge and filter to obtain clear liquid oil. The centrifugation speed is 15000r / min, the centrifugation time is 8min, the filtration temperature is 90°C, and the nano-overfrequency vibration module is used for filtration;

[0038] S2. Take the supernatant oil obtained from S1, adjust the pH=5.5 with citric acid, heat up to 60°C, add phospholipase A2, keep stirring for 3 hours, heat up to 90°C, and centrifuge to take the upper oil phase to obtain degummed oil, wherein the supernatant The weight ratio of oil and phospholipase A2 is 100:1;

[0039] S3. Add a chemical decolorizer to the degummed oil obtained in S2, heat up to 60° C., heat and stir for 30 minutes, then add diatomaceous earth and activated carbon, heat up to 75° C., heat and stir for 25 minutes, and filter to get the filtrate, wherein, the degummed oil, The weight ratio of ...

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Abstract

The invention discloses a refining method for recovered gutter oil. The refining method comprises steps as follows: S1, gutter oil is taken, solid dregs are removed from the gutter oil, the gutter oil is centrifuged and filtered, and clear oil is obtained; S2, the clear oil obtained in S1 is taken, pH is regulated, the clear oil is heated, phospholipase A2 is added, the mixture is subjected to heat-insulation stirring, heated and centrifuged, an upper oil phase is taken, and degummed oil is obtained; S3, a chemical decolorizing agent is added to the degummed oil obtained in S2, heating and heat-insulation stirring are performed, then diatomite and activated carbon are added, heating and heat-insulation stirring are performed, a mixture is filtered, and a filtrate is obtained; S4, glycerin is added to the filtrate obtained in S3, heating and heat-insulation stirring are performed, and refined gutter oil is obtained. The refining method adopts a simple process and is high in degumming rate, good in decolorization and high in esterification rate, and prepared gutter oil has light color and is low in acid value and low in phospholipid content.

Description

technical field [0001] The invention relates to the technical field of waste oil recovery, in particular to a refining method for recovering waste oil. Background technique [0002] Waste oil generally refers to all kinds of low-quality oils that exist in daily life, such as recycled cooking oil, repeatedly used frying oil, etc. The largest source of waste oil is the grease trap in the sewer of large hotels in cities. Waste oil contains a variety of toxic substances. However, due to its wide range of sources and low cost, some waste oil from the catering industry is purchased by illegal traders, and after simple refining, it flows back into the dining table. Long-term consumption may cause cancer and is extremely harmful to the human body. . And if the waste oil is discarded, it will pollute the environment, so people recycle the waste oil for reuse. The recovered waste oil can be used to prepare soap, bio-fuel, etc., but the refined waste oil is not of high quality and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B13/00
CPCC11B3/001C11B13/00Y02W30/74
Inventor 陈昌华
Owner 安庆华威油脂科技有限公司
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