English to German Tech/Engineering Cosmetics, Beauty Biotechnology

This is a term that appears in a technical text translated from Spanish into English, which nows needs to be translated into German.
Subject: processing of Aloe Vera into gel, etc.
I have an idea it means "Austeibung des Filtrats". But I don't like the term "Austreibung". Could one say "Entfernung"? The material is in barrels, is heated, mixed and then the "expulsion" takes place..
Thanks.