Henkel Ag & Company, Kgaa

Ludger Buetfering

Hans-Willi Kling

Friedhelm Siepmann

Wolfgang Krey

Bernd Schenzle

Ibolya Bartik-Himmler

Werner Opitz

A method for the automatic monitoring and control of the content of surfactants of an aqueous process solution, wherein, under program control: a sample having a predetermined volume is taken from the aqueous process solution; the content of surfactants in the sample is determined utilizing measuring equipment capable of analyzing the sample; the results of the analysis are output by the system; the functional capacity of the measuring equipment is checked by determining the surfactant content of one or more standard solutions if the results of the analysis of the content of surfactants on two consecutive drawn samples differs by a preselected value; and corrective action is automatically taken if the check of the measuring equipment reveals any problems. Bath maintenance measures may be initiated automatically or by request from a remote location according to pre-determined criteria. The method reduces the number of staff for bath monitoring and bath maintenance and increases process safety.

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Cologne, Germany

Ludger Buetfering