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CO2 Extraction Technology of Comfrey Seed Oil

Comfrey is a medicinal plant of the family Boraginaceae and the genus Comfrey, a perennial herb. Read More: Symphytum Wiki

CO2 Extraction Technology of Comfrey Seed Oil
CO2 Extraction Technology of Comfrey Seed Oil

Comfrey seed oil

Comfrey seed oil is rich in linoleic acid and linolenic acid, which can regulate human immunity and blood lipids, and has a positive effect on the treatment of cardiovascular and cerebrovascular diseases and diseases related to low immunity.

Extraction of comfrey seed oil

The production of comfrey seed oil mostly adopts solvent extraction method, which has low yield and poor oil quality and must be further refined, and there are solvent residues.

Supercritical CO2 Fluid Extraction of Comfrey Seed Oil

Using supercritical CO2 fluid to extract comfrey oil can overcome the above shortcomings. The technological process is: comfrey seed → pretreatment → supercritical CO2 fluid extraction → two-stage separation → comfrey seed oil.

Read MoreCO2 Extraction Machine: 3 Types, 4 Tips, 5 Notes, Top 6 Apps

GC-MS analysis

GC-MS analysis of CO2 comfrey seed oil shows that unsaturated fatty acids in its fatty acid composition are close to 98%, of which linoleic acid is 17.87%, a-linolenic acid is 47.02%, y-linolenic acid is 13.82%, and there are more Arachidonic acid and a small amount of Nicosia 11-enoic acid, while stearic acid content only accounts for 2.18%.

Read More: CO2 Extraction Process: Basics, 5 Advantages, 7 Features, 4 Applications