Covestro Deutschland Ag

Marc Seekamp

Stefan Wershofen

Friedhelm Steffens

Berthold Keggenhoff

Jens Krause

Christian Steffens

Jeffrey Bolton

Thomas Runowski

Gerhard Ruffert

Jörg Laue

Werner Kilian

Matthias Ruhland

Jürgen Kern

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 invention relates to a method for producing organic diisocyanates by reacting the corresponding diamines with phosgene in inert solvents. High-melting diamines from the series of 1,5-naphthalenediamine, tetralindiamine, 1,4-phenylenediamine, durenediamine, and o-tolidinediamine are used as diamines. According to the invention, a suspension of the diamines in inert solvents is produced, wherein dynamic mixing units, selected from dispersion disks and rotor-stator systems, are used, and the obtained suspension is phosgenated.

Method for producing diisocyanates by phosgenating diamine suspensions

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Kö'ln, Germany

Marc Seekamp