Preparation of Ceramic Powders Using Supercritical Nonaqueous Solvents.

Preparation of Pharmaceutical Powders using Supercritical Fluid Technology

Water in nonaqueous solvents*

The possibility and usefulness of sinple liquid models is reported. The importance of van der Waals forces for liquid water and aqueous solutions is discussed and compared with the solubility of water in nonpolar solvents and as well as of nonpolar solvents in water. Both systems could be understood as equilibrium of few water monomers. The network of H-bonded water molecules seems to be less i...

Enzymatic catalysis in nonaqueous solvents.

Subtilisin and alpha-chymotrypsin vigorously act as catalysts in a variety of dry organic solvents. Enzymatic transesterifications in organic solvents follow Michaelis-Menten kinetics, and the values of V/Km roughly correlate with solvent's hydrophobicity. The amount of water required by chymotrypsin and subtilisin for catalysis in organic solvents is much less than needed to form a monolayer o...

Electrochemical Reduction of Titanium in Nonaqueous Solvents

Introduction Literature survey Experimental • • • • Environmental chamber Electrochemical test procedure Preparation of solutions Results and discussion Characterization tests Reduction of other metals Anodic dissolution of Ti • • • • Ti reduction in DMF Ti reduction in DMSO Ti reduction in other solvents Conclusions • References CONTENTS

Solubility enhancement in supercritical solvents

The enhancement of solubility of a solid in a supercritical solvent is interpreted with emphasis placed on binary mixtures of the second class. The selection of supercritical solvent ; the choice of temperature and pressure for supercritical fluid extractions; the characteristics of solubility curves between and in the vicinities of the upper critical and the lower critical end points; the effe...