Calcium oxalate scale is a common problem encountered in the bleaching sequence in pulp
and paper manufacture, alcohol production and sugar evaporators. Downtime due to cleaning
of the hard deposit is expensive and leads to loss of production.
This study compares the activity of two maleic acid type polymers with two
phosphinocarboxylic acids and a phosphonocarboxylic acid over a range of calcium oxalate
saturation indices.
Keywords: Calcium oxalate, scale inhibitor, jar test, water chemistry, maleic acid, polymer,
phosphinocarboxylic acid, phosphonocarboxylic acid.