| 摘要 |
A reaction medium (2), capable of expansive foaming, is treated by liquid jet entrainment of gas by a nozzle positioned below the top of the treatment vessel (1). A reaction medium (2), capable of expansive foaming and comprising one or more liquid phases and an introduced gas phase, is treated by (a) using a liquid jet (16), delivered by an overhead nozzle (15), to entrain gas from above the reaction medium and around the nozzle into the reaction medium; (b) preventing any possible gas introduction other than by the jet at least when expansive foaming occurs in the treatment vessel (1); and (c) restricting the height of foam formed above the reaction medium by positioning the nozzle at a height (HB) less than that (HR) of the side walls of the vessel. An Independent claim is also included for an installation for carrying out the above process, comprising one or more liquid jet nozzles (2) positioned above the surface of the liquid phase(s) of a reaction medium (2) at a height (HB) less than that (HR) of the side walls of the vessel (1) containing the reaction medium (2) so that any expansive foam does not pass beyond the nozzle(s) and does not overflow from the vessel. Preferred Features: Gas is introduced into the liquid phase(s) only by the liquid jet which consists of liquid phase which is continuously circulated under pressure from the reaction medium (2) and which is especially reaction medium withdrawn from the vessel bottom (3). The vessel has cylindrical side walls (4) and a frustoconical bottom (3), the liquid jet (16) being inclined at a horizontal angle of 15-75 (especially 30) deg with respect to the diametral plane of the vessel and at a vertical angle of 10-30 (especially 20) deg .
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