Method of preparing storage-stable aqueous sodium peroxymonsulfa

Details Method of preparing storage-stable aqueous sodium peroxymonsulfa Method of preparing storage-stable aqueous sodium peroxymonsulfa

1991-06-28

1993-10-05

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C01B 1506, C01B 1508

Patent

active

052502805

ABSTRACT:
Previously known peroxymonosulfate solutions exhibit an unsatisfactory storage stability and/or can only be used with technical limitations. According to the invention, storage-stable, aqueous sodium peroxymonosulfate solutions can be prepared with a content of 5% to 50% by weight NaHSO.sub.5 in an economic manner by means of the partial neutralization of a solution containing sulfuric acid and Caro's acid if a such a solution containing H.sub.2 SO.sub.4 and H.sub.2 SO.sub.5 is added which contains less than 3 parts by weight hydrogen peroxide per 100 parts by weight Caro's acid and the partial neutralization is carried out up to an equivalent proportion of total SO.sub.3 to sodium ions in a range of 1 to 1 up to 1 to 1.3 and if the solution is diluted or concentrated as required.

REFERENCES:
patent: 2899272 (1959-08-01), Flach et al.
patent: 4049786 (1977-09-01), Chiang
patent: 4610865 (1986-09-01), Reh et al.

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