Process for treating and recovering waste water from the fertili

Details Process for treating and recovering waste water from the fertili Process for treating and recovering waste water from the fertili

1975-07-23

1977-01-11

Hart, Charles N.

Chemistry: fertilizers

Processes and products

71 34, 210 33, 210 37R, B01D 1506

Patent

active

040024555

ABSTRACT:
Waste water from the manufacture of fertilizers with nitrogen and others is treated on ion-exchange resins. The resulting demineralized water is used as such. The ion-exchange resins are regenerated with highly concentrated nitric acid, in excess, with highly concentrated ammonia solution, respectively. The resulting mixed effluent, with the eluated salts and with the acid excess is recycled to the manufacture of the fertilizer, at an adequate stage, wherein they are recovered.

REFERENCES:
patent: 3144321 (1964-08-01), Butikofer
patent: 3199950 (1965-08-01), Austin
patent: 3475330 (1969-10-01), Gilles
patent: 3492092 (1970-01-01), Higgins
patent: 3579322 (1971-05-01), Higgins
patent: 3660283 (1972-05-01), Ryan
patent: 3775088 (1973-11-01), Higgins
Continuous Ion-Exchange of Process Water, Chemical Eng. Progress, June 1969, No. 6, pp. 59 and 60, Higgins.
Synthetic Ion-Exchangers, G. H. Osborn, 1961, Chapman and Hill, Ltd., p. 5.

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