Preparation of a free-flow, dry and storable composition comprises mixing a moist solid with pyroge

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The present invention relates to a process for preparing a free flowing, dry and storage-stable composition, comprising mixing a moist solid with fumed silica and at least one alkaline earth carbonate and/or at least one alkaline earth oxide. Also, the invention relates to a free flowing, dry and storage stable composition containing fumed silica, at least one alkaline earth carbonate and/or at least one alkaline earth oxide and at least one further solid.