Abstract: An apparatus for feeding gas into a heated saline solution for pressure measurement or to pump this solution. The gas is introduced into the solution through a gas bubbling-in pipe having a gas outlet opening. The gas is heated prior to being introduced into the solution and is charged with moisture until the saturation of the gas comes close to or corresponds to the saturation conditions in the solution at the gas outlet opening. This minimizes clogging by crystallization at the feeder pipes carrying the measuring or purge gas.

Abstract: The invention relates to a sieve-plate column for liquid-liquid counterflow extraction of two phases which are of different weights and which are not soluble one in the other. A mixing arrangement is disposed between two sieve plates. In order to further increase cross-mixing of the phases and thus the material exchange thereof with a good rate of through-put, a static mixing element is arranged between each two sieve plates. Static mixing elements generally have, over their entire cross-section, a plurality of open channels which are arranged adjacent to each other and which extend inclinedly with respect to the direction of flow, the upper opening and the lower opening of each channel thereby being displaced radially relative to each other.