C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
71/30, 23/75
C01B 25/22 (2006.01) C05B 11/10 (2006.01)
Patent
CA 1214020
PRODUCTION OF FLUID FERTILIZER FROM PHOSPHORUS FURNACE WASTE STREAM ABSTRACT Processes and compositions of matter are disclosed for the production of liquid fertilizers wherein wastewater from a phosphorus smelting furnace is incorporated in liquid fertilizer processes. The wastewater replaces water evapo- rated and the wastewater dissolves fertilizer salts. A serious water pollution problem is avoided when wastewater is incor- porated in liquid fertilizers. The invention discloses a process for making orthophosphate suspension fertilizer wherein impure phosphoric acid is neutralized in the condensing system, water from the condensing system is bled off, and a suspending clay is added to produce orthophosphate suspension fertilizer. In this process, phosphorus sludge made at phosphorus furnaces is used to produce suspension fertilizer, and wastewater from phosphate smelting furnaces is recovered. New compositions of matter are disclosed. A process is disclosed for making phos- phoric acid with low impurities content wherein phosphorus sludge is burned to make impure orthophosphoric acid and the impure acid is recycled to an agglomerating step in a process for making elemental phosphorus. -1-
435552
James C. Barber And Associates Inc.
Kirby Eades Gale Baker
LandOfFree
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