Supercritical Fluid Extraction Process of Kenaf Seeds

Abstract

The present invention provides a supercritical fluid extraction (SFE) process for extracting oil of kenaf seed ( Hibiscus cannabinus L.), wherein the SFE process utilises a supercritical fluid and is conducted in a pressure ranging from 200 to 600 bars with a temperature ranging from 40 to 80° C.

1 . A supercritical fluid extraction (SFE) process for extracting oil of kenaf seed ( Hibiscus cannabinus  L.), wherein the SFE process utilises a supercritical fluid and is conducted in a pressure ranging from 200 to 600 bars with a temperature ranging from 40 to 80° C. 
     
     
         2 . The SFE process as claimed in  claim 1 , wherein the supercritical fluid is supercritical carbon dioxide. 
     
     
         3 . The SFE process as claimed in  claim 2 , wherein the carbon dioxide consumption is ranging from 0.025 to 3.75 kg. 
     
     
         4 . The SFE process as claimed in  claim 1 , wherein the variety of the kenaf seed is Qui Ping 3 and V36. 
     
     
         5 . The SFE process as claimed in  claim 1 , wherein the oil yield at a temperature of 40° C. and a pressure of 600 bars is 20.18%. 
     
     
         6 . The SFE process as claimed in  claim 1 , wherein the oil yield at a temperature of 60° C. and a pressure of 600 bars is 20.85%. 
     
     
         7 . The SFE process as claimed in  claim 1 , wherein the oil yield at a temperature of 80° C. and a pressure of 600 bars is 21.29%. 
     
     
         8 . The SFE process as claimed in  claim 1  is compared with solvent extraction, wherein the solvent used is n-hexane. 
     
     
         9 . The comparison of SFE and solvent extractions as claimed in  claim 9 , wherein the advantage of SFE process is to extract the kenaf seed oil under a solvent-free condition. 
     
     
         10 . The process as claimed in  claim 1 , wherein the each gram of kenaf seed oil exhibits antioxidant activity that is equivalent to 0.4 to 2 mg of α-tocopherol. 
     
     
         11 . The process as claimed in  claim 10 , wherein the kenaf seed oil extracted at 200 bars exhibits higher antiradical activity than kenaf seed oils extracted at 400 and 600 bars. 
     
     
         12 . The process as claimed in  claim 10 , wherein the SFE kenaf seed oil exhibits antiradical activity that is 2 to 3 folds higher than solvent extracted kenaf seed oil.