Extraction with Supercritical Fluids: Extraction of Liquid Mixtures
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1 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: Fax:
2 Extraction of Liquid Mixtures Advantages compared to Solid Materials continuous process fractionation of products no dead times higher throughput
3 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
4 Extraction of Liquid Mixtures Single Stage Extraction SCF 1 G 1 Feed E 1 S 1 EX 1 R 1
5 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
6 Extraction of Liquid Mixtures Multi-Stage Cross-Flow Extraction adjustment of pressure temperature solvent to feed ratio for each step accurate fractionation of substances
7 Extraction of Liquid Mixtures Multi-Stage Counter-Current Extraction Feed SCF Extract Gas (low P) Raffinate
8 Extraction of Liquid Mixtures Multi-Stage Counter-Current Extraction Liquefied Extraction Gas Reflux Enriching Section Feed Extract SCF Stripping Section Gas (low P) Raffinate
9 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
10 of Extraction Columns Columns without internals SCF + Extract Spray column Feed SCF Raffinate
11 Plate Columns of Extraction Columns phase contact plate with openings liquid supercritical fluid
12 Packed Columns of Extraction Columns different kind of internals
13 of Extraction Columns Packed Columns different kind of internals structured packings
14 of Extraction Columns Columns with Energy Input pulsating sieve plate column
15 of Extraction Columns Columns with Energy Input pulsating sieve plate column pulsating column with internals
16 of Extraction Columns Columns with Energy Input pulsating sieve plate column pulsating column with internals swinging plate column
17 of Extraction Columns CO 2-tank DV DV A 19 modifier raffinate feed extract 1 extract 2
18 of Extraction Columns
19 of Extraction Columns
20 Extract (aroma substances) Distillate (Alcohol) WINE High pressure extraction Distillation Alcohol reduced Wine Raffinate Alcohol free Raffinate
21 Distillate = Aroma + Ethanol Extract = Aroma WINE Vacuumdistillation High Pressure Extraction Alcohol reduced Wine Ethanol Raffinate
22 wine CO 2 + ethanol + aroma CO 2 + aroma Separator 1 Separator 2 High Pressure Extraction Column ethanol aroma CO 2 raffinate alcohol reduced wine
23 ethanol-concentration in raffinate [vol %] PR... Phase Ratio [kgco 2 /kgfeed] pressure [bar] PR = 5 no reflux PR = 7,5 no reflux PR = 15 no reflux PR = 30 no reflux PR = 30 with reflux
24 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
Extraction. Liquid Liquid Extraction Solid Liquid Extraction High Pressure Extraction. Lecturer: Thomas Gamse ao.univ.prof.dipl.-ing.dr.techn.
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