countercurrent extraction

countercurrent extraction

[′kau̇nt·ər‚kər·ənt ‚ek′strak·shən]
(chemical engineering)
A liquid-liquid extraction process in which the solvent and the process stream in contact with each other flow in opposite directions. Also known as countercurrent separation.
References in periodicals archive ?
In the following step, the leach solution is fed to a solvent extraction process that includes two-stage countercurrent extraction with dibutyl carbitol (diethylene glycol dibutyl ether) and multi-stage countercurrent scrubbing with 1-3 molar hydrochloric acid.