Abstract: The present invention relates to a process for the application of a liquid to a finely milled solid, which process is characterized in that the liquid to be applied to the finely milled solid is introduced into the milling zone of a fine milling apparatus during the milling operation or simultaneously with the introduction of the material for milling, and the fine milling is carried out in the presence of the finely divided liquid, and to a device for carrying out this process.

Abstract: A device for continuously purifying the waste gases from a vacuum unit using a gas permeation membrane. Reduced equipment and operating costs are achieved with good separation performance, by using a single pump to both remove the waste gas stream from the vacuum unit and to create a pressure difference across the gas permeation membrane. The vacuum pump is disposed downstream from the vacuum unit and upstream from the gas permeation meambrane. In addition to being connected to the vacuum unit, the suction side of the vacuum pump is also connected to the permeate side of the gas permeation membrane.