الفهرس 
III.1.1.3 Raman spectra results:Only 14 pages are availabe for public view
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Abstract
This study aims to Improving the quality of superphosphate
fertilizer resulting from the use of low quality phosphate rock so
phosphate 22% was selected as a sample of study. After collecting the
sample from Abu Tarture (New Valley Governorate).and grinding it,
samples on study, were prepared without additives by mixing the
determined weight by sulfuric acid (acidulation) and then with chosed
additive by mixing the additive firstly with the grounded phosphate with
certainratio and before acidulation.
Potassium was choosen as an additive because of its highly
importance for the soil and plants even in its synthesized form as
potassium sulfate or in its natural form as Illite clay. Firstly super
phosphate is in normal prepared by mixing 100g grinded phosphate with
80g of sulfuric acid 71.17% (56 pumea) and this process is called
acidulation then after stirring and completely mixing letting the sample
to dry.
In case of potassium sulfate as an additive, samples were
prepared by taking small amounts of solid potassium sulfate (1-5g) and
completely dissolve it firstly in the sulfuric acid 71.17% (56 pumea)
before starting the acidulation step then mixing with the amount of
phosphate (100g).
In case of Illite clay as an additive, after collecting Illite clay
from Abu Tartour mine and grinding it (as well as phosphate rock),thin
mixing with weighted phosphate as a ratio by adding calculated weight
of Illite clay to the phosphate sample where the total weight after mixing
is 100g then adding the sulfuric acid ex.(60g phosphate