Stabilized aqueous solutions of sodium borohydride

Details Stabilized aqueous solutions of sodium borohydride Stabilized aqueous solutions of sodium borohydride

1974-04-08

1976-01-20

Padgett, Benjamin R.

Compositions

Reductive bleachant, deoxidant, reductant, or generative

Sulfur containing reductant, bleachant, deoxidant, or...

8110, 162 83, 252105, 423286, 423515, C09K 300, D21C 304

Patent

active

039336760

ABSTRACT:
This invention relates to stabilized aqueous solutions of sodium borohydride containing soluble zinc in the form of sodium zincate. They may contain from about 35 to about 46.9 percent sodium hydroxide and from about 9.35 to about 12.9 percent sodium borohydride and 0.5 to 3 percent zinc which is preferentially added as zinc oxide and reacted with the sodium hydroxide present in the solution to form sodium zincate. These solutions may be used to react with sodium bisulfite to form solutions of sodium hydrosulfite in excellent yield. Such hydrosulfite solutions do not form trace amounts of hydrogen sulfide and do not darken or corrode copper based paper machine wires in contrast to hydrosulfite solutions which contain no soluble zinc.

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patent: 3669895 (1972-06-01), Shastri
patent: 3773679 (1973-11-01), Kise et al.
patent: 3804944 (1974-04-01), Kise et al.
Chemical Abstracts, Vol. 67, No. 65581t (1967).

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