الفهرس 
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Abstract
In this work the preparation of sodium tripolyphosphate was studied at a high yield from mono and disodium phosphate. The molar ratios of mono to disodium phosphate were ls2 and 1:1.66 respectively ,
The following variables were studied
t
1- Temperature
2- Time
3- Presence of ammonium nitrate
It was found that at molar ratio ls2 and in the absence of ammonium nitrate the maximum conversion was 84.57 at time 60 minutes and temperature 450 oc
At molar ratio 1:1.66, the product after heatine, could not be analysed because the aqueaus solution of the product gave turbid solution due to the presence of undissolved compound (Maddrell’s Salts ).
In the presence of ammonium nitrate and at molar ratio ls2 the maximum % conversion was 94.66 at time 120 minutes, 3800C, and 4.45 weight % ammonium nitrate
At molar ratio 1s1.66 higher temperature, and when suitable amounts of ammonium nitrate was added, the undissolved compounds
di,
In general the Vo’ conversion at molar ratio 1s166 was less than thelio’ conversion at molar ratio 1s2 .
The maximum percent of sodium tripolyphophate in the
product was 94.66 while it was 53110 in a sample of The Egyption, St4rck,~Cast&- D e ter
gent Compaq