| 摘要 |
1,241,940. Preparation of solutions. BOEHRINGER MANNHEIM G.m.b.H. 20 Jan., 1970 [22 Jan., 1969], No. 2737/70. Heading B1C. In the continuous large-scale preparation of solutions of definite concentration from a soluble solid material and a solvent, measured amounts of the material in finely-divided form are introduced into a current of the solvent which is moving slowly downwardly at a definite flow rate, the solution being taken off continuously, at an increased flow rate, through a passage closed by a sieve. The solvent is pumped by a pump 9 from a reservoir 8 through a thermostatically controlled means 11 to a dissolving tube 1, the pump 9 being controlled by a level or flow-through velocity measurer 10, and the solid material is conveyed by a worm or oscillating device 16, controlled by a concentration measurement cell 13, from a container 17 to the tube 1. The solution is pumped by a pump 12 from the tube 1 through the sieve 19 to a storage tank 14. The tube 1 may have a plurality of constrictions provided with sieves, Figs. 2 and 3 (not shown). |
