Bayer Aktiengesellschaft

Covestro Deutschland Ag

Bayer Technology Services Gmbh

Covestro Intellectual Property Gmbh & Co. Kg

Gerhard Ruffert

Friedhelm Steffens

Berthold Keggenhoff

Kaspar Hallenberger

Heinz-Ulrich Blank

Kai Verkerk

Jeffrey Bolton

Thomas Runowski

Ludwig Deibele

Bill Brady

Marc Seekamp

Marcus Grün

Jürgen Kern

Gunther Rauchschwalbe

Oliver Pfohl

One or more fluid streams are uniformly divided into two or more partial fluid streams in chemical apparatuses in a manner such that there is a reduced tendency to form deposits. Division of such stream(s) is achieved by using a distributor device that includes at least one plate having two or more openings which openings are rounded or chamfered on at least one side.

Method for dividing fluid streams

The present invention relates to a method for removing volatile compounds from sparingly volatile fluids by means of rectification using an auxiliary and also to separation methods and chemical reactions in which sparingly volatile fluids are used, the purification of which is effected by means of rectification and using an auxiliary.

Method for the distillative purification of slow-evaporating fluids

Process for the purification of toluenediisocyanate from a crude distillation feed which includes toluenediisocyanate, an organic solvent and less than 2% by weight phosgene by separating the crude distillation feed in a dividing-wall distillation column into at least four product fractions PP

Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column

Pure or substantially enriched 2,4- and 2,6-dinitrotoluene can be isolated from a mixture containing these isomers if such a mixture is distilled under a pressure of 0.5 to 20 mbar at a temperature of 80.degree. to 200.degree. C. with exclusion of reducing conditions.

Process for the isolation of pure dinitrotoluenes

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Leverkusen, Germany

Gerhard Ruffert