| 摘要 |
1491252 Solid/liquid and liquid/liquid contact DYNAMIT NOBEL AG 1 Nov 1974 [3 Nov 1973] 47454/74 Headings B1F and B1Q A process for the exchange of material in heterogeneous systems, e.g. for liquid/liquid extraction, solid/liquid extraction or washing solid or solid suspension with a liquid, comprises supplying a flow of a first mass to an upper region of an exchange column and a flow of a second mass lighter than the first mass to a lower region of the exchange column to flow in countercurrent with said flow of a first mass, wherein (a) the first mass flow is deflected above a plate disposed within the column and extending over the axis of the column so that the mass flow enters into a vertical rotational motion and is mixed with a lighter mass flow passing through a first passage in the plane of the plate and located adjacent the inner periphery of the column and introduced into the rotational motion (b) a mass system forming as a result of the mixing is increased in concentration with respect to the first mass in a region above a second passage in the plane of the plate and located adjacent the inner periphery of the column and (c) after a sufficient pressure drop has been built up in the region of the second passage, the said mass system increased in concentration with respect to the first mass, flows through the second passage into a space below the plate to be deflected into another vertical rotational motion but in an opposite direction to the earlier rotational motion, and is mixed with mass flow supplied from below, in which process the interior of the column is free from moving constructional parts and the travel of the mass flows therethrough is the result of motion imparted thereto prior to entry coupled with effects of gravity and said deflection. The arrangement of baffles to cause the required flows may be as shown in Figs. 3 or 4a, the flow of heavy phase being indicated by double arrows L, and of light phase by arrows K. The process may be used for the separation of dimethyl terephthalate from a suspension using methanol, separating xylene and acetic acid using water, washing glass microspheres with water, and extracting soya beans with hexane. |
