Production of urea fluorosilicate

Details Production of urea fluorosilicate Production of urea fluorosilicate

1987-10-26

1989-09-05

Terapane, John F.

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

Organic compounds

Amino nitrogen containing

C07C12701

Patent

active

H00006769

ABSTRACT:
A process for producing urea fluorosilicate, [(NH.sub.2).sub.2 CO].sub.4 .multidot.H.sub.2 SiF.sub.6, a composition eminently suitable for use as a fungicide in the prevention and control of wheat stem rust. The method involves mixing urea and fluorosilicic acid derived from by-product fluorine in a mole ratio of urea:fluorosilicate acid in the range from about 3.5:1 to about 4.5:1 and thereafter dewatering the resulting solution to produce a concentrated solution of urea fluorosilicate. Solid urea fluorosilicate is subsequently obtained by evaporation of the remaining water which is conveniently effected by introducing the resulting solution or melt to concentrator means, or alternatively into a heated, moving bed of preformed granular urea fluorosilicate.

REFERENCES:
patent: 4461913 (1984-07-01), Lewis et al.

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