Production of sodium tripolyphosphate

Details Production of sodium tripolyphosphate Production of sodium tripolyphosphate

C - Chemistry, Metallurgy

01

B

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C01B 25/40 (2006.01) C01B 25/39 (2006.01)

Patent

CA 1115481

ABSTRACT OF THE DISCLOSURE The invention relates to a process for making sodium tripolyphos- phate from wet-processed phosphoric acids which contain organic impurities, are neutralized and concentrated to give an orthophosphate solution or sus- pension which is sprayed in a spray tower in contact with one or more oxidants. More particularly, sodium tripolyphosphate, which is suitable for use in detergent slurries and causes the temperature determined after 1 and 5 minutes, respectively, in the hydration test (RDH) to be increased by at least 7°C, is made; to this end, the wet-processed phosphoric acids are first admixed with the oxidants and then concentrated.

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