Methods for removing biuret from urea by ion exchange

Details Methods for removing biuret from urea by ion exchange Methods for removing biuret from urea by ion exchange

1983-12-30

1987-04-14

Warren, Charles F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C12608

Patent

active

046580590

ABSTRACT:
Methods are provided for removing biuret from biuret-containing aqueous urea solutions which methods involve contacting a quantity of a biuret-containing aqueous urea feed solution with the hydroxide ion form of an anion exchanger under conditions sufficient to remove at least a portion of the biuret from the feed solution, and regenerating the resulting biuret-containing anion exchanger, at least in part, by contact with a substantially non-alkaline aqueous regenerant under conditions sufficient to remove at least a portion of the biuret from the anion exchanger. After completion of the described contacting with the substantially non-alkaline aqueous regenerant, the anion exchanger can optionally be further regenerated by contact with an aqueous solution of a strong base to remove additional quantities of biuret and/or other anion exchanger contaminants such as alkaline earth metal and carbonate ions and/or compounds. Methods are also provided in which one or more of the aqueous process streams which contact the anion exchanger have been treated (or comprise aqueous media which have been treated) to reduce the concentration of alkaline earth metal compounds and/or carbonate in such aqueous process streams.

REFERENCES:
patent: 3150177 (1964-09-01), Kluge
patent: 3184508 (1965-05-01), Kaasenbrood
patent: 3846298 (1974-11-01), Plura et al.
patent: 3903158 (1975-09-01), Fuentes et al.
patent: 4345099 (1982-08-01), Young et al.
Redemann et al., Ind. and Eng. Chem, vol. 50, No. 4, (1958), pp. 633-636.
"Determination of Biuret in Urea by Ion Exchange Resing," Soil and Plant Food, vol. 3, No. 3, Jan. 1958, pp. 142-144, Takahashi and Yoshida.
"Determination of Biuret in Urea and Mixed Fertilizers" Analytica Chemica Acta., vol. 41, (1968), pp. 113-120, Geurts, Steele and Brinkman.
Rohm and Haas Product Bulletin "Amberlite" IRA-400, Bulletin IE-16-56, revised Apr. 1956.

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