Liquid-Liquid Extraction in HYSYS: Introduction: In this tutorial, you will be walked through a simple liquid-liquid extraction process in HYSYS. A liquid stream containing ! mol mol percent water and "! mol percent acetone entering at #$ %, & atm, and 'lowing at a rate o' & kgmol(s will be extracted with a pure pu re )I*+ stream at the same exact conditions as the 'eed.
Initial Setup: &. Star Star Sta Start rt a new new case case in in HYSY HYSYS S #. Select Acetone Acetone at ater er and )I*+ )I*+ 'or 'or the the components. components. . se se the the /01 /012 3lui 3luid d 4acka 4ackage. ge. ". 3or 2iquid-2iqu 2iquid-2iquid id 5xtraction 5xtraction cases, cases, the binary binary coe''icien coe''icients ts o' the components components ha6e to be checked. I' some o' the coe''icients are not speci'ied speci'ied by HYSYS, a 'atal error will occur, and the process can not be simulated. 1o check the *inary %oe''icients, simply click the 7*inary %oe''s8 tab.
$. Some o' the the coe''icient coe''icientss are not speci'i speci'ied, ed, since some some o' the the tabs are le't le't blank. blank. 1here are a number o' ways ways to 'ix this. 3irst the coe''icients coe''icients can either be looked up or experimentally determined, and then entered straight straight into the appropriate appropriate box. 9r, HYSYS can estimate the unknown coe''icients using equilibrium relationships. relationships. 1o do that select either 7/I3A% 7/I3A% :258 or 7/I3A% 2258 and then clicking on the tab 7nknowns 9nly8. In 2iquid-2iquid 5xtraction 5xtraction processes, /I3A% /I3A% 225 is the appropriate estimation to use. %lose the *inary %oe''icient %oe''icient window, and enter the simulation en6ironment.
Setting up the Liquid-Liquid Extraction Process: /ow that the components and 'luids packages are selected, HYSYS is now ready to start simulating the 2iquid-2iquid 5xtraction process. &. Since this is a simple 2iquid-2iquid 5xtraction case, " process streams are needed; the 'eed, the sol6ent, the extracted product and the bottoms.
#. 0ename the streams to 3eed, Sol6ent, 5xtracted 4roduct, and 7*ottoms8. . /ow that the process streams are in place and named, place a 2iquid-2iquid 5xtraction column. %lick on the 2iquid-2iquid 5xtraction column button in the Simulation 1oolbar, and then place it on the simulation window.
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$. Speci'y a constant pressure o' &!&. k4a by typing it in to the pressure columns.
. 3inally, HYSYS prompts 'or optional temperature estimates 'or the top and bottom stages. 1hese estimates can be ignored and HYSYS will calculate them when the simulation is run. %lick 78 to complete the 2iquid-2iquid 5xtractor Input 5xpert.
?. %licking done brings up a window displaying all o' the data and options o' the 2iquid-2iquid 5xtractor.
B. 1o remo6e the extra trays, click on 7n C 8 tab under 7/um o' Stages8 on the drawing o' the column, and simply enter in ".
Specification of the Feed and Solvent Streas: A'ter completing the steps abo6e, the 2iquid-2iquid 5xtraction column should be 'ully speci'ied 'or most simple extraction cases. 1o complete and run the simulation, the 'eed and sol6ent streams need to be speci'ied. &.
#. 1he sol6ent stream contains pure )I*+ entering at #$ %, &!& k4a and 'lowing at & kg-mol(sec
!unning the Siulation "ith a Liquid-Liquid Extractor: /ow the 2iquid-2iquid 5xtraction column, and the 'eed and sol6ent streams are properly speci'ied and the simulation is ready to run. &. %lick the green light 'or unknowns.
in the upper toolbar to get HYSYS to start acti6ely sol6ing
#. hene6er a 2iquid-2iquid 5xtraction column is present in a simulation, it must be started separately.
. I' the simulation is success'ul, the workbook should look like thisD
