Basf Se Corporation

Basf Aktiengesellschaft

Dieter Stützer

Jochem Henkelmann

Ekkehard Schwab

Eckhard Stroefer

Peter Zehner

Otto Machhammer

Stephan Andreas Schunk

Goetz-Peter Schindler

Peter Pfab

Stefan Bitterlich

Stephan Deuerlein

Bernd Sachweh

Ralf Schulz

Martin Sesing

Andreas Wölfert

Regina Benfer

Christian Schneider

Martin Karches

Olga Schubert

Lothar Seidemann

Dirk Klingler

Julia Leschinski

Roman Prochazka

Michael Nilles

Thomas Grassler

Mario Emmeluth

Carsten Knösche

Stefan Berg

Frank Kleine Jäger

Jörn Müller

Dirk Groβschmidt

Stefan Hannemann

Emmanouil Pantouflas

Markus LINSENBÜHLER

The present invention relates to a process for preparing polyisocyanates from natural raw material sources, in which a composition comprising low molecular weight aromatics which comprise at least one hydroxy group or at least one alkoxy group per molecule (oxyaromatics) is produced from a biomass material, these oxyaromatics are converted into the corresponding aromatic amines and, optionally after condensation with formaldehyde, reacted further with phosgene to give compounds comprising isocyanate groups.

Process for preparing polyisocyanates from biomass

The invention relates to a method of production of catalyst particles, comprising platinum and tin and also at least one further element, selected from lanthanum and cesium, on zirconium dioxide as support, comprising the steps: preparation of one or more solutions containing precursor compounds of Pt, Sn and at least one further element of La or Cs and also ZrO, converting the solution(s) to an aerosol, bringing the aerosol into a directly or indirectly heated pyrolysis zone, carrying out pyrolysis, and separation of the particles formed from the pyrolysis gas. Suitable precursor compounds comprise zirconium(IV) acetylacetonate, lanthanum(II) acetylacetonate and cesium acetate, hexamethyldisiloxane, tin 2-ethylhexanoate, platinum acetylacetonate, zirconium(IV) propylate in n-propanol and lanthanum(II) acetylacetonate. The invention also relates to the catalyst particles obtainable using the method according to the invention, and to the use thereof as dehydrogenation catalysts.

Catalyst from flame-spray pyrolysis and catalyst for autothermal propane dehydrogenation

A reactor () of high cylindrical construction for continuously carrying out gas-liquid, liquid-liquid or gas-liquid-solid reactions, provided with a downward-directed jet nozzle () via which the starting materials and the reaction mixture are fed in and which is located in the upper region of the reactor, and provided with an offtake (), preferably in the lower region of the reactor, via which the reaction mixture is conveyed via an external circuit back to the jet nozzle () by means of a pump (P), wherein a guide tube () which extends essentially over the total length of the reactor () with the exception of the reactor ends and has a cross-sectional area in the range from one tenth to one half of the cross-sectional area of the reactor () is located concentrically in the reactor (), and the jet nozzle () is located above the upper end of the guide tube (), preferably at a distance of from one eighth of the guide tube diameter to one guide tube diameter, or projects into the guide tube () to a depth up to a plurality of guide tube diameters is proposed. A heat exchanger, in particular a heat exchanger having heat exchange tubes (), preferably running parallel to the guide tube, welded in between plates (), is integrated into the annular space.

Reactor for carrying out gas-liquid, liquid, liquid-liquid or gas-liquid-solid chemical reactions

Growing community of inventors

Dudenhofen, Germany

Dieter Stützer