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US 6,319,288 B1Granted
Formamidinesulfinic-acid compositions
AssigneeDegussa AG
InventorsHarald Jakob, Bernd Hopf
Life of this patent
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Abstract
A blend is disclosed containing formamidinesulfinic acid, an scale-inhibiting agent that can be neutral or acidic, and/or finely divided silica having good flowability to be used for the purpose of reductive bleaching in the paper and textile industries, whereby, in particular, polcarboxylates and polyacrylic acids are employed having a content of about 10% of a polyamide in the form of a copolymer.
Claims11
A pulverulent or granulated formamidinesulfinic acid composition having improved flow and stability properties, comprising:
- formamidinesulfinic acid;
- a scale-inhibiting agent comprising at least one member selected from the group consisting of a polycarboxylate, a polyphosphoric acid, and citric acid or a soluble salt thereof;
- and
- finely divided silica.
1 more element
Dependencies are inferred from the claim text.