Process for preparing peroxyborate agglomerates
AssigneePeroxid-Chemie GmbH
InventorsWerner Doetsch, Richard Roesler, Werner Zeiss, Rudolf Siegel
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Abstract
A process is described for preparing peroxyborate agglomerates having an active oxygen content of at least 14% by weight in which amorphous primary particles composed of peroxyborate prepared by a spray drying process are subjected to compacting pressing-agglomeration. Briquettes, compressed strips and tablets can be obtained which can be comminuted, if desired, to peroxyborate granules of desired particle size and bulk density. Advantageous, optionally colored, peroxyborate agglomerates, particularly peroxyborate granules are prepared. Preferred agglomerates and granules are composed of sodium peroxyborates.
Claims13
A process for preparing a peroxyborate agglomerate comprising the steps of:
- compacting amorphous, spray dried primary peroxyborate particles by dry pressing in a roller press to agglomerates in the form of smooth, fluted or textured pressed strips, said particles having an active oxygen content of at least 14% by weight and being selected from the group consisting of peroxyborate particles having a Na:B ratio of less than 1 and peroxyborate particles having an active oxygen content greater than 18% by weight;
- and
- subsequently comminuting said strips into smaller agglomerates in the form of granular amorphous material having a desired particle size and bulk density.
A peroxyborate agglomerate having an active oxygen content of at least 14% by weight produced by the process comprising the steps of compacting amorphous, spray dried primary peroxyborate particles by dry pressing in a roller press to agglomerates in the form of smooth, fluted or textured pressed strips, and subsequently comminuting said strips into smaller agglomerates in the form of granular amorphous material having a desired particle size and bulk density;
- wherein said agglomerate is in the form of granular amorphous material and said peroxyborate is sodium peroxyborate having an Na:B mole ratio of 0.33:1 to 0.67:1 and an active oxygen content of 14 to 25% by weight.
A peroxyborate agglomerate having an active oxygen content of at least 14% by weight produced by the process comprising the steps of compacting amorphous, spray dried primary peroxyborate particles by dry pressing in a roller press to agglomerates in the form of smooth, fluted or textured pressed strips, said particles having an active oxygen content of at least 14% by weight;
- and subsequently comminuting said strips into smaller agglomerates in the form of granular amorphous material having a desired particle size and bulk density;
- wherein said peroxyborate is sodium peroxyborate and said agglomerate is in the form of granular amorphous material having an Na:B molar ratio in the range from 0.45:1 to 0.65:1.
Dependencies are inferred from the claim text.