Cleaning of filter surfaces
AssigneeRhone-Poulenc Chimie
InventorsGuy Nineuil, Louis Rivoirard
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Abstract
Encrusted filter surfaces that have been used for filtering wet process phosphoric acid slurries are effectively cleaned, e.g., of crystalline deposits, by washing same with a solution of fluosilic acid.
Claims15
A process for the cleaning of a filter surface that has been used for the filtration of a wet process phosphoric acid slurry, comprising washing said filter surface with a solution consisting essentially of fluosilicic acid, wherein said filter surface has been preliminarily mechanically stripped of the solid filter cake formed thereon the preliminarily stripped filter surface bearing encrusted deposits of crystalline solids which are removed by said solution.
The process as defined by claim 15, said metal screen having a filter cloth disposed thereon.
Dependencies are inferred from the claim text.