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A new high-pressure micronisation process for the gentle processing of high molecular mass gelatine
Reibe, Christian ; Knez, Željko ; Weidner, Eckhard
This article introduces a new high-pressure process for the gentle drying, micronisation and formulation of high molecular mass gelatine. Spray drying ofgelatine solutions is a well-established ...process for very low molecular weight gelatine, aqueous solutions containing low gelatine concentrations or gelatine solutions containing viscosity reducing additives. In the introduced process, supercritical CO2 was applied to micronised aqueous gelatine solutions and was then expanded from high pressure into a spraying chamber to remove the water content by extraction and evaporation under moderate conditions. The resulting product was analysed using common powder analysis methods. Aqueous gelatine solutions with a dry mass content of up to 50 wt.-percent with a molecular mass of 156,000 g mol-1 were pulverised and driedwith this process, with only limited degradation by hydrolysis during processing.
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