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US 5,797,988 AGranted
Process for producing briquetted and pressed granular material and use thereof
AssigneeBayer Aktiengesellschaft
InventorsGunter Linde, Olaf Schmidt-Park, Manfred Eitel, Lothar Steiling
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Abstract
The present invention relates to a process for producing briquetted and pressed granular material and the use thereof for coloring building materials, such as concrete, and organic media, such as paint systems, plastics and colored pastes.
Claims19
A process for producing briquetted and pressed granular material from carbon blacks and auxiliary substances comprising the steps of
- a) mixing one or more inorganic carbon blacks with one or more auxiliary substances promoting processability,
- b) subjecting this mixture to a pressing or briquetting step to produce a pressed or briquetted product,
- c) comminuting the pressed or briquetted product to produce a comminuted product,
- d) dividing the comminuted product into two or more fractions,
- e) removing a first fraction of particles having at least 85% of the particles at least 80 .mu.m as product and transferring the other fraction or fractions out of the process.
2 more elements
Dependencies are inferred from the claim text.