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US 6,586,010 B1Granted
Method for producing agglomerates comprising a core-shell structure
AssigneeBASF SE
InventorsWerner Bertleff, Ulrich Bröckel, Helmut Fricke, Hans-Peter Harz, Reiner Witt
Life of this patent
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Abstract
A process for producing agglomerates with a core/shell structure, in which i) initial agglomerates containing a first particulate solid are prepared; ii) a second particulate solid is agglomerated in the presence of the initial agglomerates with the addition of a binder liquid to give second stage agglomerates and, where appropriate, iii) an nth (n≧3) solid is agglomerated in the presence of the (n−1)th stage agglomerates with the addition of a binder liquid to give nth stage agglomerates.
Claims7
A process for producing agglomerates with a core/shell structure, in which
- i) initial agglomerates containing a first particulate solid are provided;
- ii) a second particulate solid is agglomerated in the presence of the initial agglomerates and, optionally,
- iii) an nth (n≧3) particulate solid is agglomerated in the presence of the (n−1)th stage agglomerates,
- wherein the agglomeration in step ii) and/or iii) takes place by
- a) dispersing the initial agglomerates and the second particulate solid or the (n−1)th stage agglomerates and the nth particulate solid, respectively, in a suspending liquid in which both the first particulate solid and the second particulate solid or the (n−1)th particulate solid and the nth particulate solid, respectively, are essentially insoluble the
- b) introducing into the suspending liquid, a binder liquid which is essentially immiscible with the suspending liquid, and
- c) drying the resulted agglomerates of step b) to obtain a core/shell structure.
4 more elements
Dependencies are inferred from the claim text.