Super-oxidized solid sodium perborate and processes for its manu

Details Super-oxidized solid sodium perborate and processes for its manu Super-oxidized solid sodium perborate and processes for its manu

1978-04-10

1980-01-29

Padgett, Benjamin R.

Bleaching and dyeing; fluid treatment and chemical modification

Bleaching

Chemical

252 99, 252186, 423281, C01b 1512, C11d 339, C11d 3395

Patent

active

041859600

ABSTRACT:
Superoxidized solid sodium perborate contains more than 17 wt.% active oxygen and less than 1.4 atoms hydrogen per active oxygen atom. The superoxidized solid sodium perborate in particle form is prepared by simultaneously introducing, into a fluidized bed dryer containing seeds of dimensions smaller than those of the perborate particles which are to be obtained, an aqueous solution containing hydrogen peroxide in concentrations above 30 wt.% and an aqueous solution containing sodium metaborate in such quantities that the molar ratio between the hydrogen peroxide and the sodium metaborate introduced into the fluidized bed is above 1.12. The water present in the aqueous solutions is evaporated by means of a fluidizing gas.

REFERENCES:
patent: 3598524 (1971-08-01), Reilly
patent: 3661510 (1972-05-01), Winkley
patent: 3832447 (1974-08-01), Dillenberg et al.
patent: 3985862 (1976-10-01), Knippschild et al.
patent: 4115519 (1978-09-01), Brichard et al.

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