Hoechst Aktiengesellschaft

Ewald Preisegger

Hans-Matthias Deger

Thomas Muller

Walter Muller

Joachim Naumann

Wolfgang Scholten

Martin Schnauber

Rainer Henrici

A sterilant gas mixture is presented for cold-gas sterilization, which comprises alkene oxide and 1,1,1,2,3,3,3-heptafluoropropane. The sterilant gas mixture comprises from 12 to 22 mol % of ethylene oxide or propylene oxide and from 78 to 88 mol % of 1,1,1,2,3,3,3-heptafluoropropane.

Sterilant gas mixture comprising alkylene oxide and

The invention relates to a method for testing objects by thermal shock in a closed apparatus, comprising the following, preferably repeated steps:

Method and device for the thermal shock test

Filler for sensor systems of temperature-sensitive displacement pickups

In this process the organic solvents which are obtained in a liquid state in the drying phase are pumped away. The solvents present in the form of a solvent vapor/air mixture are partially condensed by cooling and the fractions of solvent still remaining in vapor form are adsorbed by active charcoal. These adsorbed solvents are recovered by setting up a saturation partial pressure of the solvent in the solvent vapor/air mixture of not more than 0.25 bar. The fractions of solvent adsorbed in the active charcoal are desorbed by means of a solvent vapor/air mixture of the same concentration as in the adsorption process and at temperatures of approx. 100.degree. to 150.degree. C.

Process for the recovery of solvents in the treatment of textiles

Growing community of inventors

Nauheim, Germany

Ewald Preisegger