Method for purification preparation of high content linoleic acid by using vegetable oil as raw material
A technology for linoleic acid and vegetable oil, which is applied in the field of crystallization and separation of linoleic acid and oleic acid after fatty acid salt formation, can solve the problems of difficult recovery, difficult recovery of urea, and high cost, and achieves a simple and easy method, high purity and low cost. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0042] (1) 200g of sunflower oil was saponified and acidified to obtain mixed fatty acids of sunflower oil, put the mixed fatty acids into an environment at 4°C for 6 hours to stand for crystallization, and filter to remove the precipitated saturated fatty acids;
[0043] (2) Take 160g of mixed fatty acids and add them to 800mL of 15% magnesium acetate in acetone aqueous solution, wherein the ratio of acetone to water is 4:1 (v:v), and stir and react at 40°C for 1h;
[0044] (3) Slowly cool down the reaction solution to 0°C, let it stand for crystallization for 24 hours, filter and separate the precipitate and filtrate, recover acetone from the filtrate by vacuum distillation, add dropwise an appropriate amount of hydrochloric acid to convert the fatty acid salt into free fatty acid, and obtain crude linoleic acid after washing with water sample;
[0045] (4) The crude linoleic acid is subjected to molecular distillation to remove low-boiling point and high-boiling point impur...
Embodiment 2
[0047] (1) Take a certain amount of safflower seed oil and carry out saponification and acidification treatment to obtain free fatty acids of safflower seed oil, slowly cool down to 0°C, let stand for crystallization for 2 hours, and filter to remove saturated fatty acid components;
[0048] (2) The mixed fatty acid is added in the acetone aqueous solution of magnesium sulfate, wherein the mol ratio of mixed fatty acid and magnesium sulfate is 1:2, the mass volume ratio of fatty acid and acetone aqueous solution is 1:10, and the volume fraction of acetone in the acetone aqueous solution is 95 %, stirred and reacted at 30°C for 1.5h to obtain a clear fatty acid magnesium acetone solution;
[0049] (3) Slowly lower the temperature of the reaction solution to -10°C, let it stand for crystallization overnight, quickly filter and separate the precipitate and the filtrate, acidify the filtrate after recovering acetone, and obtain crude linoleic acid after washing with water;
[0050] ...
Embodiment 3
[0052] (1) 300g of soybean oil was saponified and acidified to obtain free fatty acid of soybean oil, the fatty acid was slowly stirred and cooled to 10°C, allowed to stand for crystallization for 12 hours, and filtered to remove the precipitated components;
[0053] (2) Add 240 g of mixed fatty acids into 480 mL of 20% magnesium chloride in acetone aqueous solution, the acetone concentration is 90%, and stir and react at 50° C. for 0.5 h to obtain a clear fatty acid magnesium acetone solution;
[0054] (3) Slowly lower the temperature of the reaction solution to -20°C, let it stand for crystallization for 4 hours, quickly filter and separate the precipitate and the filtrate, recover the acetone from the filtrate, acidify it, and wash it with water to obtain crude linoleic acid;
[0055] (4) The crude linoleic acid is removed by molecular distillation to remove low-boiling point and high-boiling point impurity components, and the content of the final linoleic acid product is 88...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More