Hoogovens Groep B.v.

Hoogovens Ijmuiden B.v.

Bob De Mon

Eric Jan Stuart

Antonius I Van Hoorn

A method of removal of polycyclic aromatic hydrocarbons (PAH) by precoat vacuum filtration is characterized in that organic particles are present in the precoat which, when subjected to a specific precoat layer build-up test, have a layer thickness in the range 30-200 mm. The immersion depth of the drum during the filtering is more than 40% of the drum diameter. Improved filtering results. A method of testing a finely divided organic material in order to determine its suitability for precoat vacuum filtration is also disclosed.

Method of removal of polycyclic aromatic hydrocarbons from a liquid

Method for regenerating an electrolytic liquid for tinning purposes in which the electrolytic liquid is freed from ions of foreign metals introduced into it during the tinning action, characterized by the steps of (a) detinning of the electrolytic liquid through electrolysis and (b) releasing of the foreign metal ions by means of a cation exchanger.

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Alkmaar, Netherlands

Bob De Mon