Plant squalane composition, preparation method thereof, and application thereof

A preparation method of a plant squalane composition, wherein the plant squalane composition comprising:

• at least 92.0 wt % of squalane by weight;
• and
• 0.5-3.0 wt % of cyclosqualane by weight;
• wherein a chemical structure of the squalane is:
• wherein a chemical structure of the cyclosqualane is:
• wherein the preparation method comprising:
• a step 1:
• hydrogenating a plant squalene raw material, wherein squalene in the plant squalene raw material accounts for at least 70.0 wt % of a total weight of the plant squalene raw material;
• a step 2:
• separating the squalane and impurities by fractionation to obtain the plant squalane composition, wherein a content of the squalane in the plant squalane composition is not less than 92.0 wt %, and a content of the cyclosqualane in the plant squalane composition is 0.5-3.0 wt %;
• and
• a step 3:
• refining the plant squalane composition;
• wherein the step 2 comprises:
• a step 21, performing a first distillation to remove plant alkane, fatty acid alkyl ester, and a small amount of the squalane, wherein removed plant alkane and removed fatty acid alkyl este have a low boiling-point, and first remaining material comprises most of the squalane, plant alkane, the cyclosqualane, and plant asphalt;
• and
• a step 22:
• performing a second distillation to obtain a main composition containing the squalane and the cyclosqualane, and enabling that the content of the squalane in the main composition is not less than 92.0 wt % and the content of the cyclosqualane is 0.5-3.0 wt % by adjusting parameters, wherein second remaining material is the plant asphalt with a high-boiling point;
• wherein in the step 1, a catalyst for hydrogenating the plant squalene raw material is metal nickel, supported nickel, or Raney nickel, a hydrogenation temperature is 180-220° C., and a hydrogenation pressure is 5-15 MPa, and a hydrogenation time is 6-24 hours;
• and wherein during the step 1 hydrogenating, part of the squalene is converted into the cyclosqualane, a ratio of the cyclosqualane to the squalane is 1-10%.