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CN-121991759-A - Camellia oil decoloring method based on modified palm wood-based activated carbon

CN121991759ACN 121991759 ACN121991759 ACN 121991759ACN-121991759-A

Abstract

The invention discloses a camellia oil decoloring method based on modified palm wood-based activated carbon, and belongs to the technical field of oil refining. The method takes renewable palm wood (Oil palm tree) as a raw material for preparing the activated carbon, prepares the palm wood-based activated carbon (OPAC), and adopts modification treatment to increase the high specific surface area and the activated carbon with rich pore structure so as to increase the adsorption capacity, and the modified palm wood-based activated carbon is applied to the camellia Oil decolorization process, so that carotenoid, chlorophyll and impurities in the camellia Oil can be effectively removed, and meanwhile, the active ingredients in the camellia Oil are reserved.

Inventors

  • LIU GUOQIN
  • Song Yidi

Assignees

  • 华南理工大学

Dates

Publication Date
20260508
Application Date
20260331

Claims (10)

  1. 1. The camellia oil decoloring method based on the modified palm wood-based activated carbon is characterized by comprising the following steps of: (1) The preparation of the palm wood-based activated carbon comprises the steps of crushing palm wood waste, and drying, carbonizing and activating to obtain the palm wood-based activated carbon; (2) The modification treatment of the palm wood-based activated carbon, namely placing the palm wood-based activated carbon obtained in the step (1) into a modifier solution, stirring for reaction, filtering, washing to be neutral after the reaction is finished, and drying to obtain the modified palm wood-based activated carbon; (3) Decoloring the camellia oil, namely heating the camellia oil, adding the modified palm wood-based activated carbon obtained in the step (2), stirring for decoloring, and filtering and separating to obtain decolored camellia oil.
  2. 2. The camellia oil decolorization method according to claim 1, wherein in the step (1), the drying temperature is 105-120 ℃, the drying time is 2-4 hours, the carbonization treatment is to raise the temperature to 400-500 ℃ at a temperature rising rate of 5-10 ℃ per minute under a nitrogen atmosphere, the heat preservation is carried out for 2-3 hours, the activation treatment adopts steam activation, the activation temperature is 800-900 ℃, and the activation time is 1-2 hours.
  3. 3. The camellia oil decolorization method of claim 1, wherein in the step (2), the modifier solution is a mixed solution of nitric acid and phosphoric acid, wherein the mass fraction of nitric acid is 5% -10% and the mass fraction of phosphoric acid is 3% -5%.
  4. 4. The camellia oil decolorization method of claim 1, wherein in step (2), the liquid-to-solid ratio of the modifier solution to palm wood-based activated carbon is 5:1 to 10:1 in mL/g.
  5. 5. The camellia oil decolorization method of claim 1, wherein in the step (2), the temperature of the stirring reaction is 60-80 ℃ and the reaction time is 2-4h.
  6. 6. The camellia oil decolorization method of claim 1, wherein in the step (2), the drying temperature is 80-100 ℃ and the drying time is 3-5 hours.
  7. 7. The process for decoloring camellia oil according to claim 1, wherein in step (3), the camellia oil is heated at 60-85 ℃.
  8. 8. The camellia oil decolorization method according to claim 1, wherein in the step (3), the addition amount of the modified palm wood-based activated carbon is 2% -5% of the mass of the camellia oil, and the stirring decolorization time is 30-60min.
  9. 9. The camellia oil decolorization method of claim 1, wherein in the step (3), centrifugal filtration is adopted for filtration and separation, and the modified palm wood-based activated carbon obtained after filtration can be reused after regeneration treatment.
  10. 10. The camellia oil decolorization method of claim 9, wherein the regeneration treatment is to wash the used modified palm wood-based activated carbon with deionized water until the washing liquid is colorless, then dry the washed palm wood-based activated carbon at 110-120 ℃ for 2-3 hours, and then bake the washed palm wood-based activated carbon at 500-600 ℃ for 1-2 hours under nitrogen atmosphere.

Description

Camellia oil decoloring method based on modified palm wood-based activated carbon Technical Field The invention relates to the technical field of oil refining, in particular to a camellia oil decoloring method based on modified palm wood-based activated carbon. Background The camellia oil is high-quality edible vegetable oil, is rich in polyunsaturated fatty acid, vitamin E and other nutritional ingredients, and has high nutritional value and health care function. However, pigments (such as carotenoid, chlorophyll and the like) and impurities are brought in by the raw materials or the processing technology and the like in the process of squeezing or refining the camellia oil, so that the color and quality of the camellia oil are affected, and the market application of the camellia oil is limited. Therefore, the decolorization treatment of camellia oil is one of the key steps for improving the quality of camellia oil. Currently, common methods for grease decolorization include adsorption decolorization, chemical decolorization, membrane separation decolorization and the like. Among them, the adsorption decolorization method is widely used because of simple operation and good effect, and commonly used adsorbents include activated carbon, activated clay, and the like. The activated carbon has larger specific surface area and rich pore structure, and good adsorption performance, but the selective adsorption capability of common activated carbon to pigment in camellia oil needs to be improved, and part of the activated carbon has higher cost (research on the decolorization effect of several decolorizers on rapeseed oil, chinese grease, volume 45 of 2020, 1 st period; optimization of cosmetic-grade camellia oil decolorization process, food industry 2021, 42 (01): 92-95), and limits the large-scale application of the activated carbon in grease decolorization. Palm wood is a woody part of a palmaceae plant, has wide sources and low price, and can be used as a raw material for preparing the activated carbon, so that the recycling of wastes can be realized, and the production cost of the activated carbon can be reduced. However, the adsorption performance of the original palm wood-based activated carbon is difficult to meet the requirement of efficient decolorization, and the surface chemical property and the pore structure of the original palm wood-based activated carbon are required to be improved through modification treatment, so that the adsorption capacity of the original palm wood-based activated carbon to pigments is improved. Based on the method, the camellia oil decolorization method based on the modified palm wood-based activated carbon is provided, and the palm wood-based activated carbon is subjected to composite modification, so that the adsorption performance of the palm wood-based activated carbon on pigment in the camellia oil is enhanced, the efficient decolorization is realized, meanwhile, the cost is reduced, and the method has a good application prospect. Disclosure of Invention In order to solve the existing technical problems, the invention aims to provide the camellia oil decoloring method based on the modified palm wood-based activated carbon, which is used for enhancing the adsorption performance of the palm wood-based activated carbon on pigment in the camellia oil and realizing efficient decoloring by carrying out composite modification on the palm wood-based activated carbon. In order to achieve the above purpose, the present invention adopts the following technical scheme. The invention provides a camellia oil decoloring method based on modified palm wood-based activated carbon, which comprises the following steps of: (1) The preparation of the palm wood-based activated carbon comprises the steps of crushing palm wood waste, and drying, carbonizing and activating to obtain the palm wood-based activated carbon; (2) The modification treatment of the palm wood-based activated carbon, namely placing the palm wood-based activated carbon obtained in the step (1) into a modifier solution, stirring for reaction, filtering, washing to be neutral after the reaction is finished, and drying to obtain the modified palm wood-based activated carbon; (3) Decoloring the camellia oil, namely heating the camellia oil, adding the modified palm wood-based activated carbon obtained in the step (2), stirring for decoloring, and filtering and separating to obtain decolored camellia oil. Further, in the step (1), the drying temperature is 105-120 ℃ and the drying time is 2-4h. Further, in the step (1), carbonization treatment is carried out by raising the temperature to 400-500 ℃ at a temperature raising rate of 5-10 ℃ per minute under nitrogen atmosphere, and preserving the temperature for 2-3 hours. Further, in the step (1), the activation treatment adopts steam activation, the activation temperature is 800-900 ℃, and the activation time is 1-2h. Further, in the step (2), the modifier solution is a mixed solut