Aziende Colori Nazionali Affini Acna S.p.a.

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Ausimont

Antonino Condo

Sisto S Papa

Renzo Ferrario

Process for the manufacture of granular monohydrated sodium perborate, endowed with abrasion resistance, starting from the corresponding tetrahydrated perborate, characterized in that a carboxylic acid, containing from 1 to 3 C atoms, or an alkali metal salt thereof, is added to the tetrahydrated perborate, already present in the granular state, whereafter a dehydration of the tetrahydrated perborate is carried out.

Process for the manufacture of granular monohydrated sodium perborate

The sulfonated disazo dyestuff of the formula: ##STR1## is useful in dyeing cotton and other cellulosic fibers.

Water-soluble disazo dyestuff derived from 4,4-diaminobenzanilide

A water-soluble triazo dyestuff of the formula: ##STR1## The dyestuff, which is useful in dyeing cotton and other cellulosic fibers, is prepared by diazotizing 2-aminophenol-4-sulfonic acid, coupling the diazotized sulfonic acid with resorcinol, treating the reaction mixture with a copper complexing agent at 35.degree.-40.degree. C and a pH of 5-5.5, separately tetraazotizing 4,4'-diaminobenzanilide, coupling the tetraazotate with the previously formed reaction product to form a diazo-disazoic reaction product, and coupling the latter product with m-aminophenol to produce the desired dyestuff.

Water-soluble trisazosulfonated dyestuff derived from

Sulphonated azoic dyestuffs of the formula: ##SPC1## Are useful in dyeing cotton, other cellulosic fibers, natural and synthetic polyamide fibers and leather.

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Milan, Italy

Antonino Condo