At PCK, the EXTRACTOR K401 column in the AROSOLVAN system was to be cleaned during the revision. Large quantities of surfactants are used to clean the extractor in the 300,000 litre system. These are circulated through the system at high temperature for a considerable period of time. Caramba was involved in the planning one year before the revision was due to start and developed a more powerful cleaning agent together with the refiner within this period. Caramba anticipated a relevant potential for optimisation both in terms of the retention time of the cleaning solution and the cleaning result in the entire column.
During this period Caramba, in close cooperation with its own research and development department and PCK Raffinerie GmbH, developed a tailor-made cleaning agent specifically for use in the mixer-settler column. The MSK cleaner was added to the system in a volume of 30,000 litres. The system was additionally filled with water and ramped up to 80°C to clean it. The system was flushed by means of circulation over a period of 29 hours. Subsequently, the wash solution was drained and disposed of according to regulations.
Use of Caramba MSK Cleaner enabled complete removal of all deposits and residues in the extractor column within the calculated time frame. The revision work was completed in less time than anticipated and the performance and efficiency of the system were restored to the original status of when the system was first commissioned.