摘要:
The invention concerns a method for encapsulating fine solid particles in the form of microcapsules. Said method is characterised in that it comprises steps which consist in forming a suspension of said particles in a liquid consisting of at least a coating agent in intimate contact with a fluid having a pressure lower than its critical pressure, so as to saturate said suspension, spraying said fluid-saturated suspension through expansion means, and collecting the microcapsules in the gas stream resulting from decompression.
摘要:
The invention concerns a method and an installation for setting in adsorbed state, on a porous support, compounds contained in a product comprising a first step which consists in extracting the compounds by contacting the product with at least a solvent at supercritical pressure to obtain a mixture of extracts and solvent. The method is characterised in that it comprises a second step which consists in eliminating the water contained in the mixture of extracts and solvent, adjusting the temperature and pressure conditions so as to obtain, a first phase consisting of solvent in gaseous state and a second phase consisting of a mixture of liquids formed of solvent and extracts of the products; causing said two phases to trickle through a porous support adapted to adsorb the extracts; vaporizing the solvent contained in the second phase.
摘要:
The invention concerns a method for capturing very fine particles present in a fluid flux in liquid, gaseous or supercritical state and a device therefor. The method is characterised in that it comprises steps which consist in: causing said flux to pass through a filtering element (13); stopping the emission of said flux; countercurrent clearing of the filtering material (31) with a carbon dioxide flow under pressure, so as to drive the particles deposited on the filtering material (31); countercurrent expanding of the flux, so as to trap the particles within a solid carbon dioxide snow-type mixture formed during its expansion.
摘要:
The invention concerns a device and a method for cleaning working parts, using a cleaning fluid, comprising a chamber (1) wherein is arranged a basket (7) containing the parts (27) to be cleaned, said basket (27) outer wall being spaced from the chamber (1) inner wall so as to provide between them a passage (9) for the cleaning fluid, the device further comprising intake means (25) for the cleaning fluid and means for extracting (15) it. Said device is characterised in that the chamber (1) base forms a ring-shaped chute (13) located beneath said passage (9), connected to the means extracting (15) the cleaning fluid, and inside which are arranged means for heating (17, 18) said fluid, and the intake means (25) are located in the chamber (1) upper part.
摘要:
On corrige les perturbations de compositions d'un extrait (EA), ou d'un raffinat (RB), dues au volume mort introduit par au moins une pompe (P) de recyclage d'un mélange liquide, supercritique ou gazeux dans une boucle fermée de tronçons de colonnes, ou dues à la dégradation de leur propriété de séparation chaque fois qu'un courant d'injection ou de soutirage passe d'une position antérieure à une position postérieure à chacun des volumes morts de la boucle ou à chacun des tronçons dont les proprétés de séparation sont dégradées. On augmente d'abord, d'une valeur appropriée, la durée de connexion dudit courant à la boucle, et ensuite lorsque le courant passe de la position postérieure au volume mort ou à la connexion du tronçon dégradé, à la position suivante, on diminue ladite durée de connexion, de telle façon que ladite durée reprenne la valeur qui aurait été appliquée si chacun des volumes morts avait été négligé ou les dégradations de propriétés de séparation avaient été négligées.
摘要:
The invention concerns a method and an installation for setting in adsorbed state, on a porous support, compounds contained in a product comprising a first step which consists in extracting the compounds by contacting the product with at least a solvent at supercritical pressure to obtain a mixture of extracts and solvent. The method is characterised in that it comprises a second step which consists in eliminating the water contained in the mixture of extracts and solvent, adjusting the temperature and pressure conditions so as to obtain, a first phase consisting of solvent in gaseous state and a second phase consisting of a mixture of liquids formed of solvent and extracts of the products; causing said two phases to trickle through a porous support adapted to adsorb the extracts; vaporizing the solvent contained in the second phase.
摘要:
The invention concerns a method for making very fine particles containing at least an active principle inserted in a host molecule and a device for implementing said method. The method is characterised in that it consists in forming a solution of the active principle in a first liquid solvent and of a product formed by the host molecules in a second liquid solvent, then in contacting the resulting solutions with a supercritical pressure fluid, so as to precipitate the host molecules which are dissolved therein.
摘要:
The invention concerns a method for collecting and encapsulating with a coating agent particles dispersed in a fluid at supercritical pressure and an installation for implementing said method. Said method is characterised in that it comprises steps which consist in: expanding said fluid at a pressure less than its critical pressure, so as to bring it to a gaseous state; causing said gas to trickle down in a liquid consisting of a solution substantially saturated with the coating agent in a solvent in which the particles are insoluble, so as to extract at least partially the solvent; and causing the coating agent to precipitate onto the particles thereby forming microcapsules.
摘要:
The invention concerns a method for capturing very fine particles present in a fluid flux in liquid, gaseous or supercritical state and a device therefor. The method is characterised in that it comprises steps which consist in: causing said flux to pass through a filtering element (13); stopping the emission of said flux; countercurrent clearing of the filtering material (31) with a carbon dioxide flow under pressure, so as to drive the particles deposited on the filtering material (31); countercurrent expanding of the flux, so as to trap the particles within a solid carbon dioxide snow-type mixture formed during its expansion.
摘要:
This invention concerns a procedure for processing paper documents, including books. The procedure's characterizing feature is that it comprises an initial stage in which the documents to be processed are exposed to the effects of a supercritical pressure fluid formed from a mixture of a gas with 1 % to 20 % mass of an alcohol. The invention also concerns a solvent and equipment for applying the procedure.