Extraction with Supercritical Fluids: Extraction of Liquid Mixtures Thomas Gamse Ass.Prof.Univ.Doz.Dipl.-Ing.Dr.techn. Department of Chemical Engineering and Environmental Technology Graz University of Technology Inffeldgasse 25/C, A-8010 Graz Tel: ++43 316 873 7477 Fax: ++43 316 873 7472 Email: Thomas.Gamse@TUGraz.at
Extraction of Liquid Mixtures Advantages compared to Solid Materials continuous process fractionation of products no dead times higher throughput
Extraction of Liquid Mixtures Liquid-Liquid Extraction no pressure influence solvent regeneration distillation re extraction energy intensive SCFE pressure changes density viscosity surface tension phase equilibrium density difference simple solvent regeneration
Extraction of Liquid Mixtures Single Stage Extraction SCF 1 G 1 Feed E 1 S 1 EX 1 R 1
Extraction of Liquid Mixtures Multi-Stage Cross-Flow Extraction Feed E 1 SCF1 S 1 G 1 R 1 SCF 2 EX 1 G 2 E 2 S 2 R 2 SCF 3 EX 2 G 3 E 3 S 3 EX 3 R n-1 SCF n G n E n S n R n EX n
Extraction of Liquid Mixtures Multi-Stage Cross-Flow Extraction adjustment of pressure temperature solvent to feed ratio for each step accurate fractionation of substances
Extraction of Liquid Mixtures Multi-Stage Counter-Current Extraction Feed SCF Extract Gas (low P) Raffinate
Extraction of Liquid Mixtures Multi-Stage Counter-Current Extraction Liquefied Extraction Gas Reflux Enriching Section Feed Extract SCF Stripping Section Gas (low P) Raffinate
Extraction of Liquid Mixtures Multi-Stage Counter-Current Extraction influence parameters pressure temperature solvent to feed ratio dispersed continuous phase drop size and drop size distribution amount of reflux
of Extraction Columns Columns without internals SCF + Extract Spray column Feed SCF Raffinate
Plate Columns of Extraction Columns phase contact plate with openings liquid supercritical fluid
Packed Columns of Extraction Columns different kind of internals
of Extraction Columns Packed Columns different kind of internals structured packings
of Extraction Columns Columns with Energy Input pulsating sieve plate column
of Extraction Columns Columns with Energy Input pulsating sieve plate column pulsating column with internals
of Extraction Columns Columns with Energy Input pulsating sieve plate column pulsating column with internals swinging plate column
of Extraction Columns CO 2-tank DV DV A 19 modifier raffinate feed extract 1 extract 2
of Extraction Columns
of Extraction Columns
Extract (aroma substances) Distillate (Alcohol) WINE High pressure extraction Distillation Alcohol reduced Wine Raffinate Alcohol free Raffinate
Distillate = Aroma + Ethanol Extract = Aroma WINE Vacuumdistillation High Pressure Extraction Alcohol reduced Wine Ethanol Raffinate
wine CO 2 + ethanol + aroma CO 2 + aroma Separator 1 Separator 2 High Pressure Extraction Column ethanol aroma CO 2 raffinate alcohol reduced wine
ethanol-concentration in raffinate [vol %] 10 9 8 7 6 5 4 3 2 1 0 PR... Phase Ratio [kgco 2 /kgfeed] 80 90 100 110 120 130 140 150 160 170 180 pressure [bar] PR = 5 no reflux PR = 7,5 no reflux PR = 15 no reflux PR = 30 no reflux PR = 30 with reflux
Further separation of fatty acids separation of tocopherols separation of fish oil esters fractionation of orange and citrus oil separation of aromas from whiskey and cognac