Abstract: An installation for preparing liquid and/or gaseous carbon dioxide is described, having a first container which is configured to store liquid carbon dioxide, wherein the first container is in fluid communication with a second container by at least a first pump, wherein said pump is configured for pumping carbon dioxide out of the first container via a first valve into the second container. A measuring apparatus is provided for measuring the mass of the second container, wherein the installation is configured such that the first valve is closed off so that no more carbon dioxide can be supplied to the second container when the mass of the second container measured by the measuring apparatus reaches or exceeds a predefined value. Methods for preparing liquid carbon dioxide are also provided for.

Abstract: A method for obtaining pure copper is provided wherein oxygen is blown onto a copper melt, in a melting furnace lined with refractory material, having a waste heat boiler set onto it, in order to oxidize contaminants contained in the melt and thereby remove them from the melt, and wherein a splash protection device through which water flows is provided above the copper melt, on the inside wall of the melting furnace, which prevents copper that splashes out of the copper melt from penetrating into the waste heat boiler. Boiling water is used for cooling the splash protection device, which water is under a pressure of more than 5 bar and is evaporated, at least in part, as it flows through the splash protection device.

Abstract: The invention relates to a process for the deposition of a material on a surface. The process utilizes the steps of providing a material to be deposited on the surface; providing a transport medium comprising liquid, subcritical carbon dioxide; combining the material and the transport medium to obtain a combination of the material and the transport medium; and delivering the combination to the surface.

Abstract: A method for obtaining pure copper is provided wherein oxygen is blown onto a copper melt, in a melting furnace lined with refractory material, having a waste heat boiler set onto it, in order to oxidize contaminants contained in the melt and thereby remove them from the melt, and wherein a splash protection device through which water flows is provided above the copper melt, on the inside wall of the melting furnace, which prevents copper that splashes out of the copper melt from penetrating into the waste heat boiler. Boiling water is used for cooling the splash protection device, which water is under a pressure of more than 5 bar and is evaporated, at least in part, as it flows through the splash protection device.

Abstract: A process for operating a jet pump with a driving nozzle from which a driving medium, especially steam, exits at supersonic speed, this driving medium mixing with a gaseous load medium. According to the invention, downstream of the outlet of the nozzle in the mixing region the circumferential length is increased by a cross-sectional shape of the driving jet diverging from the circle in order to eliminate the azimuthal symmetry of the vortex structure of the driving medium, wherein the respective cross-sectional surface corresponding to the principle of continuity beginning in the jet direction with a circular cross section in the supersonic portion of the jet corresponds to the circular cross-section surface of the driving medium in conventional supersonic nozzles.