B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 2/02 (2006.01)
Patent
CA 2391401
A method of preparing particles of a substance, for example selected from a flavour, fragrance, pigment, dye, biologically active compound or a plastics material, comprises contacting the substance or a formulation (which may include the substance in conjunction with a second solvent) with a first solvent which comprises a C1-C4 hydrofluorocarbon, especially tetrafluoroethane, and subjecting the resultant mixture to a separation process, for example, by allowing the mixture to be sprayed as a mist (14) from a high pressure environment in a first vessel (2) to a low pressure environment in a second vessel (8), thereby to cause separation of at least some of the substance from the first solvent and the formation of fine particles (20) of the substance.
L'invention concerne un procédé de préparation de particules d'une substance sélectionnée, par exemple, dans un arôme, une fragrance, un pigment, un colorant, un composé bioactif ou une matière plastique qui consiste à mettre en contact la substance ou une formulation (susceptible de renfermer la substance combinée à un second solvant) avec un premier solvant renfermant un hydrofluorocarbone C1-C4, notamment un tétrafluoroéthane, et à séparer le mélange obtenu, notamment par la pulvérisation du mélange sous forme d'embrun (14) provenant d'un environnement sous basse pression dans une seconde cuve (8). Ainsi, une partie au moins de la substance est séparée du premier solvant et de fines particules (20) de la substance se forment.
Advanced Phytonics Limited
Glaxo Group Limited
Sim & Mcburney
LandOfFree
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