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US 9,388,053 B2Granted
Anhydrous sodium carbonate having a low pore content
AssigneeMerck Patent GmbH
InventorsJens Klatyk, Hans-Kurt Peth, Thorsten Wedel, Guenter Moddelmog
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Abstract
The present invention relates to a highly pure, anhydrous sodium carbonate having a low pore content for use in pharmaceutical formulations and in the foods industry. Furthermore, a novel process for the preparation of this sodium carbonate is provided.
Claims28
Crystalline sodium carbonate, which crystalline sodium carbonate:
- is an anhydrous product,
- is a highly pure product shown by a sodium carbonate content of not less than 99.5% determined acidimetrically,
- consists of particles having a smooth surface structure and a low pore content shown by a BET pore volume of about 0.0013 cm3/g or less,
- has a drying loss after preparation of not more than 0.2% by weight, and
- has a BET surface area of less than 1 m2/g.
2 more elements
Dependencies are inferred from the claim text.