Abstract: The present invention relates to a method of preparing a pharmaceutical co-crystal composition, said method comprising the steps of: a. simultaneously contacting a supercritical or liquefied gas with solid particles of a pharmaceutically active component and with solid particles of a co-builder to form a co-crystallisation medium containing dissolved pharmaceutically active component and dissolved co-builder as well as solid particles of the pharmaceutically active component and solid particles of the co-builder; b. transforming the solid particles of the pharmaceutically active component and the solid particles of the co-builder into co-crystals of said pharmaceutically active component and said co-builder by keeping the supercritical or liquefied gas in a supercritical or liquid state until at least 80 wt. % of the pharmaceutically active component is incorporated in the crystal matrix of said co-crystals; and c.

Abstract: The invention is directed to a process for the production of sodium carbonate-anhydrate having a bulk density of at least 800 kg/m3, said process comprising: providing a suspension of solid sodium carbonate and/or solid sodium bicarbonate and/or solid double salts at least comprising one of sodium carbonate and sodium bicarbonate, in a mixture containing water and an organic, water miscible or partly water miscible solvent, which solvent influences the transition temperature below which sodium carbonate monohydrate is stable, whereby the type and the amount of solvent is selected in such way that the said transition temperature is below the boiling point of the said mixture of water and an organic, water miscible or partly water miscible solvent, in case sodium bicarbonate is present, converting the bicarbonate into carbonate, crystallising sodium carbonate anhydrate from said mixture at a temperature above the said transition temperature and below the said boiling point, and recovering the sodium carbona

Abstract: A process is presented in which anhydrous soda is crystallized and worked up to produce anhydrous soda crystals with a bulk density from 1300 to 1600 kg/m3. The process is characterized in that a solvent is used that allows the crystals to be formed and handled at atmospheric pressure in the presence of water without the monohydrate of soda being formed.