Przemysl Chemiczny, Vol.89, No.4, 282-285, 2010
Statistical analysis of results of studied on preparation of sodium tripolyphosphate of medium bulk density
Prepn. of Na tripolyphosphate (I) of low bulk d. by calcination of a mixt. of Na phosphates and H(2)O was assessed by using a quasi-optimum D Hartley exptl. design. The bulk d. of was 0.90-0.95 kg/L under optimum conditions (H(2)O/phosphates mass ratio 25/100, H(2)O temp. 15 degrees C, rubbing time 5 min, max. calcination temp. 350 degrees C or 550 degrees C.