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US 2021/0292167 A1Published application
Process for the Stabilisation of Hydrosulphite
AssigneeESSECO S.r.l.
InventorAdelio Mazzola
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AssigneeESSECO S.r.l.
InventorAdelio Mazzola
Estimating the term…
A process for the production of hydrosulphite is described, which provides the mixing of said hydrosulphite with one or more acids chosen among 4-aminobenzoic acid, 4-hydroxybenzoic acid or 4-methylbenzoic acid and with an alkaline salt of oxalic acid. Optionally, a compound is added, chosen among one or more alkaline carbonates and one or more alkaline tripolyphosphates. Advantageously, the components added to hydrosulphite make up a percentage ranging between 0.1 and 20% by weight of the total hydrosulphite. A formulation is also described, containing sodium hydrosulphite and between 0.1 and 20% by weight of a mixture containing: one or more acids chosen among 4-aminobenzoic acid, 4-hydroxybenzoic acid or 4-methylbenzoic acid; an alkaline salt of oxalic acid and possibly one or more alkaline carbonates; one or more alkaline tripolyphosphates.
1) A process for the stabilisation of hydrosulphite, characterised in that it provides the mixing of said hydrosulphite with one or more acids, chosen among 4-aminobenzoic acid, 4-hydroxybenzoic acid or a 4-alkyl benzoic acid and with an ammonium, alkaline or alkaline-earth salt of oxalic acid.
14) A formulation, comprising:
Dependencies are inferred from the claim text.