METHOD OF DESUBLIMATION OF SOLID SUBSTANCES AND A DEVICE FOR ITS REALIZATION Russian patent published in 2004 - IPC

FIELD: chemical and pharmaceutical industries. SUBSTANCE: the invention presents a method of desublimation of solid substances and a device for its realization. The group of inventions is pertinent to desublimation engineering and may be used in chemical and a pharmaceutical industries for production of mixtures of the fine- and ultra-dispersed materials in small volumes of products. Technical result is production of the fine- and ultra-dispersed materials in small volumes of products. Desublimation of solid substances is realized by interaction of a cool gas-carrier with vapors of a desublimated product. At that the separate interaction of the gas-carrier is exercised with vapors of no less than two kinds of desublimated substances till achieving a condition of a supersaturation of vapor-gas mixtures in two desublimators. Then the mixtures are kept in the zone of desublimation till the required particle sizes are reached, and then streams of the gases - solid particles are fed in counter direction to each other and into a mixing chamber, in the lower part of which there are the slit type apertures with guide grooves, where a layer-by-layer mixing of the streams takes place. At that the layers of one stream are directed counter to the layers of another stream at the similar angles to the vertical because on one wall of the mixing chamber the guides are located at the similar angles to an axis of the device in the interval of their values of 30^o-75^o, and the layers of the second stream are directed at variable angles and for the purpose on the opposite wall of the mixing chamber the guides are located at the different angles with their increasing values varying from 30^o up to 75^o. After that the produced mixture is separated for the fine- and ultra-dispersed materials. EFFECT: the invention allows to produce the fine- and ultra-dispersed materials in small volumes of products. 2 cl, 3 dwg, 1 tbl