Pierre Fabre Medicament

Florence Marciacq

Bernard Freiss

Hubert Lochard

Christophe Joussot-Dubien

Jacques Fages

Martial Sauceau

Jean-Jacques Letourneau

Mathieu Soulayres

The invention relates to a method for preparing a soluble inclusion complex comprising one or several active substances which are hardly soluble in an aqueous medium and are included in one or several host molecules, using the following successive stages: (a) bringing one or several active substances into contact with one or several host molecules; (b) initiating a molecular diffusion stage by bringing a dense pressurized fluid into contact with the mixture obtained in (a) in a static mode in the presence of one or several diffusing agents; (c) recovering the active substance-host molecule molecular complex formed; (d) adding and mixing an interaction agent with the active substance-host molecule molecular complex; (e) recovering the soluble inclusion compound thus formed. The invention also relates to the soluble inclusion compound obtained by the method, particularly a piroxicam-cyclodextrin-arginine compound.

Inclusion complexes containing piroxicam, a cyclodextrin and arginine

The present invention relates to a continuous process of DHA enrichment of a solution of fatty acids or derivatives thereof comprising less than 50% of DHA relative to the total fatty acids of the solution or to derivatives thereof, wherein the process comprises the steps of (a) simultaneous countercurrent injection, into a fractionation column, of the flow of the solution of fatty acids or of derivatives thereof and of a flow of supercritical COat a temperature of less than or equal to 70&#xb0; C. and at a pressure of between 100&#xd7;10Pa and 160&#xd7;10Pa, wherein the level of supercritical COis between 30 and 70, and (b) recovery of the residue comprising at least 50% of DHA relative to the total fatty acids of the residue or to derivatives thereof, wherein the DHA yield is greater than or equal to 60%.

DHA enrichment process

The invention concerns a method for preparing compounds for interaction of an active substance hardly soluble in an aqueous medium with a porous support. The invention is characterized in that it comprises the following steps: (a) mixing the active substance generated by supercritical fluid and the specific amount of porous support; (b) carrying out a molecular diffusion step by contacting in static mode a supercritical fluid with the mixture obtained at step (a) for the time required to improve the dissolution in the aqueous medium of the mixture obtained at step (a); (c) washing the interactive compound obtained at step (b) with a supercritical fluid flow; (d) recuperating the particles of the interactive compound thus formed. The invention also concerns a compound obtainable by said method.

Method for preparing a compound of interaction of active substances with a porous support using supercritical fluid

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Brens, France

Florence Marciacq