Abstract: A process is disclosed for purifying gases and liquids and/or for recovering particles contained or substances dissolved therein or for implementing other technological process procedures. Technological process procedures take place in exchangeable, mobile, individual vessels (1,2,3,4) chargeable with active known substances (for instance ion exchange resins) and/or provided with technological process assemblies (for instance mechanical filters), the vessels being mutually connected and forming a reaction column (7). The vessels (1,2,3,4) filled with the same or with different substances are passed by one medium or by several separate media partial streams (X,Y). In the case of several partial streams, the media partial streams (X,Y) always pass part of the vessels (1,2,3,4) or, after mixing, the resulting media mixture (X+Y) passes the other part of the vessels (1,2,3,4).

Abstract: This invention relates to equipment for rendering visible a specific metal charge of an ion exchanger comprising transparent viewing means, permeable container means behind said viewing means, and a mixture of chargeable resin particles and inert particles in said container means, said inert particles being lighter in weight than said resin particles when the latter are charged with metal ions. The invention also relates to a process for rendering visible a specific metal charge of an ion exchanger.