Summary: Extraction
Summary: Extraction
New knowledge Triangle phase equilibrium diagram cross flow process mass balance in triangle diagram
New knowledge • Triangle phase equilibrium diagram • cross flow process • mass balance in triangle diagram
Old method theoretical stage model differential contact model minimum solvent/feed ratio engineering considerations Exercise 1 of week 9 Exercise of this week
Old method • theoretical stage model • differential contact model • minimum solvent/feed ratio • engineering considerations – Exercise 1 of week 9 – Exercise of this week
When to use extraction? Distillation is preferential When distillation is dificult(azeotropic or relative volatility is close to 1) When distillation is inefficient(eg 1% HAc water) When the component is heat sensitive(eg bioproduct, penicillin)
When to use extraction? • Distillation is preferential. • When distillation is difficult (azeotropic or relative volatility is close to 1) • When distillation is inefficient (eg 1% HAc water) • When the component is heat sensitive (eg bioproduct, penicillin)
Limitation of extraction AB should be miscible B and s should be immiscible or partially miscible Solvent should be regenerated either through distillation or other methods
Limitation of extraction • AB should be miscible; • B and S should be immiscible or partially miscible; • Solvent should be regenerated either through distillation or other methods