Solvay Fluor Und Derivate Gmbh

Solvay (societe Anonyme)

Solvay Sa

Solvay Fluor Gmbh

Solvay

Lothar Zipfel

Werner Kruecke

Karsten Boerner

Pierre Barthelemy

Pierre Dournel

Matthias Rieland

Thomas Born

Alf Schulz

Eckhard Hausmann

Karsten Börner

Werner Krücke

Thomas Benecke

Dierk-Ingolf Recke

A composition which comprises 1,1,1,3,3-pentafluorobutane-(HFC-365mfc) and 1,1,3,3-pentafluoropropane (HFC-245fa) in a weight ratio HFC-365mfc/HFC-245fa of from 60:40 to 75:25.

Hydrofluorocarbon compositions

A method for the production of polyurethane foams and of thermoplastic foams is described. As blowing agent, a composition is used, which contains or consists of pentafluorobutane, preferably pentafluorobutane (HFC-365mfc) and at least one further blowing agent selected from the group comprising; difluoromethane (HFC-32); difluoroethane, preferably 1,1-difluoroethane (HFC-152a); 1,1,2,2-tetrafluoroethane (HFC-134); 1,1,1,2-tetrafluoroethane (HFC-134a); hexafluoropropane, preferably 1,1,1,3,3,3-hexafluoropropane (HFC-236fa); 1,1,2,3,3,3-hexafluoropropane (HFC-236ea) and heptafluoropropane, preferably 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), low-boiling, optionally halogenated hydrocarbons and/or low-boiling, optionally halogenated ethers.

Production of polyurethane foams and of foamed thermoplastic synthetic resins

Sulfuryl fluoride (SO.sub.2 F.sub.2) frequently contains chlorine, sulfur dioxide and other acidic impurities owing to its production. Effective purification is possible if the sulfuryl fluoride is contacted with hydrogen peroxide or a precursor thereof, preferably in an aqueous solution. The purified product is suitable as a pesticidal agent, for example.

Purification of sulfuryl fluoride

Mixtures containing 1,1,1,3,3 pentafluorobutane

Process for the stabilization of compositions containing hydrofluoroalkanes by addition of at least one salt of at least one metal chosen from lithium and/or the alkaline-earth metals in a sufficient quantity to stabilize the hydrofluoroalkanes and stabilized compositions containing hydrofluoroalkanes.

Process for the stabilization of compositions containing

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Laatzen, Germany

Lothar Zipfel