Solvay Fluor Und Derivate Gmbh

Other

Solvay Sa

Solvay Fluor Gmbh

Thomas Schwarze

Heinz-Joachim Belt

Michael Pittroff

Johannes Eicher

Matthias Rieland

Sebastian Hasenstab-Riedel

Ercan Uenveren

Holger Pernice

Marc Lacroix

Oliviero Diana

Peter M Predikant

Stefan Mross

Christoph Sommer

Reiner Fischer

Pierre Barth&eacute;lemy

Daniel Clement Lauzon

Anja Pischtiak

A method for dielectrically insulating active electric parts A method for dielectrically insulating an active electric part wherein the electrical active part is arranged in a gas-tight housing comprising an insulating gas which contains or consists of a compound of formula (i) Rf1-(O)x-Rf2 wherein Rf1 and Rf2 are identical or different and designated fluorocarbon residues having a H/F ratio of equal to or less than 0.5 and x is 1, 2, or 3.

Method for dielectrically insulating active electric parts

Gas mixtures of SF and N which have been used as an insulating filler gas for underground cables can be separated by use of a membrane separation in order to recover the SF .

Isolation of SF6 from insulating gases in gas-insulated lines

A method for the recovery or separation of sulfur oxyfluorides from gas mixtures, in which the gas mixture passes through at least one adsorption stage or membrane stage containing or consisting of zeolites with a modulus >10. The sulfur oxyfluorides fixed to the adsorbent may be made available for use after desorption. The sulfur oxyfluorides enriched through the membrane can be re-used directly.

Method for recovering and/or separating sulfur oxyfluorides from gas mixtures

Gas mixtures of SF and N , which have been used, for example, as an insulating filler gas for underground cables, for insulating-gas window panes or as a filler gas for car tires and SF /air mixtures which have been used as a protective gas when casting magnesium can be separated if they are contacted with hydrophobic zeolites of a certain pore size as selective adsorption agent for sulfur hexafluoride. For a relatively high SF concentration, the mixture is preferably first subjected to a membrane separation process and the permeate is contacted with the adsorption agent. The invention also relates to an apparatus for carrying out the process. The process may also be used for separating SF from exhaust gases.

Separation of gases containing SF6

A method of avoiding generation of waste water while brazing components made of aluminium or an aluminium alloy using a flux, especially a flux composed of an aqueous suspension of potassium fluoroaluminate. Since used suspension is replaced with fresh suspension after a given period of time and the apparatus regularly have to be cleaned, waste water is produced which contains flux, e.g. potassium fluoroaluminate. In the past, such waste water has been discharged into the environment. It has now been discovered that such waste water can be recycled to the brazing process after separation of the flux. In this manner, the production of waste water can be largely avoided. Since surfactants are frequently used, and these are likewise recirculated, a corresponding saving in terms of surfactant is possible. Furthermore, the environment is protected correspondingly.

Aluminum brazing method which avoids waste water

Growing community of inventors

Ahlten, Germany

Thomas Schwarze