Bayer Materialscience Ag

Bayer Aktiengesellschaft

Jochen Mahrenholtz

Hans-Georg Pirkl

Jeffrey Bolton

Stefan Wershofen

Walter Meckel

Udo Wolf

Matthias Wintermantel

Heinz-Herbert Müller

Ulrich Wolf

Martin Schiffhauer

Sabine Pegel

Jun Wang

Martin Gerlach

Gerhard Then

Johannes Schweer

J&ouml;rg-Rainer Schmitz

Oliver Fleschentr&auml;ger

Erman Sevinc

Klaus-Michael Zeyen

Richard H Guhl

Andrea Wimschneider

Stefan Dresely

A production process such as an isocyanate production process, conducted with a production facility having (a) at least two incoming streams, b) at least one exit stream and c) at least one inner recycling stream is controlled by adjusting at least one incoming stream amount by means of regulating controls to control the exit stream concentration and/or amount.

Process for controlling a production process

The invention relates to a method for determining the isomer composition in an isocyanate isomer mixture, wherein a spectrum of the isomer mixture is recorded and the spectrum is entered into a chemometric calibration model.

Method and device for determining the isomer composition in isocyanate production processes

The present invention relates to a process for the production of MDI fractions containing 2,4'-MDI, and in which the 2,2&#x2032;-MDI component from the MDA production is largely removed from the isomer mixture. Highly reactive monomeric MDI products can be produced in this way. These MDI products are characterised in their processing by significantly reduced emissions of MDI monomers.

Process for the production of very pure 2,4'-methylenediphenyl diisocyanate

A self-cleaning separator is described for cohesive or adhesive solids from a fluidborne stream of solids on the basis of a cyclonelike separation. The separator consists at least of a cylindrical upper section ( ) having a separating chamber ( ), a product inlet ( ), a fluid outlet ( ), and of a conical lower section ( ) having a solids outlet ( ) adjoining below the lower section ( ), at least the side wall ( ) of the upper section ( ) being produced from an elastic material, in particular an elastomeric material.

Self-cleaning separator for cohesive or adhesive products

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Krefeld, Germany

Jochen Mahrenholtz