Liquid-Liquid Extraction (LLE)

0.0(0)
studied byStudied by 0 people
GameKnowt Play
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/11

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

12 Terms

1
New cards

Mixer-settler inputs

Feed

Solvent

2
New cards

Mixer-settler outputs

Raffinate

Extract

3
New cards

Mass flow rates F, S, R and E are typically

Solute free

4
New cards

Raffinate

Carrier liquid after solute removal

F = R for a solute free basis

5
New cards

Extract

Solvent after absorbing solute

E = S for solute free basis

6
New cards

When is LLE used? (5)

Both components close to boiling

Components heat sensitive or flammable

Mixture forms azeotrope

Solution is dilute

One or both species involatile

7
New cards

Operating line slope for single stage unit

-F/S

8
New cards

Co-current cascade

Least efficient

Equilibrium reached after 1 stage, no further separation

9
New cards

Cross-current cascade

Each unit uses fresh feed of solvent S, split into N streams

Feed / raffinate on x-axis (‘crosses’ the fresh streams)

10
New cards

Cross-current operating line

Perform balance around nth unit

Slope -NF/S

11
New cards

Counter-current cascade

Most effective, similar to absorber + stripper

12
New cards

Counter-current cascade operating line

Balance nth unit

Slope +F/S