Recovery of L‐lysine from dilute water solutions by liquid pertraction

Abstract

Kinetics of liquid membrane (Pertraction) recovery of L-lysine from dilute aqueous solutions is studied in a tow-compartment glass cell. A 5% (vol) solution of the cation exchange carrier di(2-ethylhexyl)phosphoric acid in n-decane was used as intermediate, membrane liquid. The third stripping phase was 1/v hydrochloric acid. The reaction mechanism and stoichiometry were defined, and on the basis of the proposed mathematical model of the process and the experimental data obtained, the mass transfer coefficients were evaluated. It was found that overall transfer rate is controlled by the eddy diffusion of transported species in the donor and membrane liquids. The results proved the feasibility of the pertraction process for recovery and concentration of L-lysine from its dilute aqueous solutions.

Extraction of alcohol using emulsion liquid membrane consisting of paraffin oil as an organic phase and lecithin as a surfactant

“…A good number of papers are available in the literature regarding the extraction of carboxylic acids such as acetic, citric and lactic acids12–16 as well as amino acids such as troptophan, lysine, phenylalanine and glutamic acid17–19 using emulsion liquid membranes. A further advantage of liquid emulsion processes is the creation of very large surface area to volume ratios 20.…”

Modelling and Comparative Analysis of Different Methods of Liquid Membrane Separations

“…However, due to low throughput, this method is hardly applicable in large-scale separation processes, in particular, in hydrometallurgy. The conventional extraction-stripping process includes an extraction column and a stripping column; in the film pertraction, three phases flow as parallel films [ 1 , 2 , 3 ]. In the emulsion membrane extraction, two options are possible: (1) the aqueous stripping phase is encapsulated as microdroplets in large droplets of a liquid membrane moving in a continuous aqueous feed solution [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]; and (2) the aqueous feed phase is encapsulated as microdroplets in large droplets of the liquid membrane phase rising or falling in the continuous stripping phase.…”

Batch Extraction of Citric Acid with Liquid Surfactant Membranes

“…The extraction of amino acids has been investigated: Leodidis and Hatton [1,2] and Itoh et al [3] phenylalanine extraction; Boyadzhiev and Atanassova [4] l-lysine extraction; and Takeshima and Hirose [5] histamine extraction.…”