Urea-hydrogen peroxide-polyvinylpyrrolidone process

Details Urea-hydrogen peroxide-polyvinylpyrrolidone process Urea-hydrogen peroxide-polyvinylpyrrolidone process

1992-07-02

1993-04-27

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

423272, 423265, 524438, 25218629, C07D40314, C01B 1501

Patent

active

052063852

ABSTRACT:
Urea-hydrogen peroxide-polyvinylpyrrolidone (PVP) in the form of a free-flowing powder is stable against decomposition in water and alcohol solvents. The product is obtained by spraying an aqueous solution of urea-hydrogen peroxide onto a fluidized bed of PVP and drying; it contains about 5%-20% by weight H.sub.2 O.sub.2 and less than about 5% water. The urea-hydrogen peroxide solution is applied onto the fluidized PVP bed at a predetermined rate, suitably about 0.5-30 g of solution/minute/kg PVP in the bed, and, preferably, about 1-3 g/min/kg PVP.

REFERENCES:
patent: 4929272 (1990-07-01), Login et al.
patent: 5008093 (1991-04-01), Merianos

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