Process for making granulated condensed phosphates

Details Process for making granulated condensed phosphates Process for making granulated condensed phosphates

C - Chemistry, Metallurgy

01

B

23/374, 23/64

C01B 25/38 (2006.01) C01B 25/39 (2006.01) C11D 3/06 (2006.01)

Patent

CA 1171635

ABSTRACT OF THE DISCLOSURE: The invention relates to a process for converting water-soluble, condensed phosphates of the following general formula (I) Image (I) in which M stands for sodium, potassium or Ammounium and n stands for a number between 4 and about 100, to granulate, wherein the pulverulent, water-soluble, condensed phosphate is thouroughly agitated and granulated in the presence fo water and of a phosphate salt other than the condensed phosphate. More specifically, the condensed phosphate of general formula (I) or a mixture of the phosphate with an anhydrous or partially hydrated alkali metal phosphate is thoroughly agitated and granulated in the presence of water and an ammonium polyphosphate of the following general formula (II) Image (II) in which n stands for an integral average value of 3 to 1000, m stands for a whole number of up to ? ? 2, and the m/n-ratio is between about 1.0 and 1.57.

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