Patent ID: 8057678
Filing Date: 2011-11-15
Classification: B01D,C23C

Abstract:
1. A method for the regeneration of an electrolyte bath used for a metallization process without a current in a process vessel comprising: a) removing at least a partial flow of the electrolyte from the process vessel; b) regenerating said at least partial flow removed in step (a) said regenerating consisting of dialysis, wherein said dialysis excludes electrodialysis; c) adding metallization components to the at least partial flow; and d) returning the at least partial flow to the process vessel; whereby said dialysis excluding electrodialysis exchanges formate anions and sulfate anions released during the metallization process with hydroxide ions via an anion selective membrane through which said formate anions and sulfate anions pass from the partial flow of removed electrolyte to a counter solution and through which said hydroxide ions pass from said counter solution to the partial flow of removed electrolyte during said regeneration; whereby as said counter solution comprising a hydroxide ion source and recipient of said formate anions and sulfate anions for the regeneration, a solution is used which is selected from the group consisting of an alkali hydroxide-containing solution and an alkaline earth hydroxide-containing solution.