Abstract: An agitator for agitating liquids in an agitator vessel for suspending solids and dispersing gas in a liquid, in particular in an absorber of a flue gas desulfurizing plant, includes an agitator vessel, an agitator shaft extending into the agitator vessel, and an agitating propeller mounted to the agitator shaft within the agitator vessel. The agitator shaft is hollow to define an interior space for conducting gas into the agitator vessel and injecting gas on the pressure side of the agitating propeller into the liquid.

Abstract: An auto-aspirating, rotational dispersion device for gases and liquids with a rotating hollow shaft employed for gas suction and gas channels communicating with said hollow shaft to openings in the gas channels that are positioned at intervals over the circumference of the device, at which openings the gas and liquid are mixed. The device is distinguished by the fact that the gas being dispersed flows in a manner separate from the liquid, from the hollow shaft through the gas channels and is mixed with the liquid outside of the device.

Abstract: A stirring element (10), especially a gasing stirring element for stirring liquids and introducing a gas, preferably air, to the liquids. The stirring element has a hub (12) for attachment to a stirring shaft and a support disk (14) joined to the hub (12), a plurality of stirring blades (16) being attached to a peripheral edge of the support disk (14). To achieve a low output power coefficient, each stirring blade (16) is made of a wedge-shape that is directed in the direction of rotary motion of the stirring element (10). Preferably, radially inner end sections (22, 24) of two sides (18, 20) of the stirring blade (16) are angled relative to sides (18, 20) outwardly with reference to the direction of rotary motion of the stirring element (10). The stirring element (10) simplifies gas feed and prevents clogs. By providing the support disk (14) with a conical shape having a ring of teeth (26) on its outer edge, a uniform distribution and good dispersion of the gas bubbles is obtainable.

Abstract: The present invention generally pertains to an agitating element for agitating low-to-medium-viscosity liquids. The agitating element comprises an inner main blade and an outer side blade, and the two blades are integrally constructed. The main blade is angled with respect to the rotation axis of the agitating element, while the side blade is angled with respect to the rotation plane of the agitating element. The agitating element according to the current invention enables high hydraulic efficiency especially in a vertical direction so as to accomplish thorough mixing of the material with a minimal energy input.

Abstract: This apparatus for gas-liquid reactions includes a vessel (1) which is gas-tight and capable of withstanding pressure, a rotatory agitator device (3) to provide for the gas-liquid contact and a heat exchanger device. This heat exchanger device is provided as an assembly of plates (4) positioned approximately vertically around the agitator device, in such a manner as to form an angle of 0 to 70.degree. with respect to the radius, in the direction of rotation of the agitator device, and a heat exchanger fluid circulates inside these plates.

Abstract: Phosgene is prepared from chlorine and carbon monoxide by plural stage catalytic interreaction wherein all of the chlorine requirement and at least some but less than all of the carbon monoxide requirement is introduced to a first stage reaction zone, with the remaining required carbon monoxide being introduced to downstream reaction zone(s) serially connected to said first stage reaction zone.