Basf Aktiengesellschaft

Gerd Bohner

Gerd Kaibel

Rolf-Hartmuth Fischer

Ulrich Steinbrenner

Christoph Sigwart

Martin Haubner

Klaus Kindler

Melanie Pahl

Michael Hesse

Ekkehard Schwab

Hartmut Hibst

Andreas Tenten

Gerhard Cox

Herbert Vogel

Thomas Narbeshuber

Gerd Linden

Herbert Exner

Christian Tragut

Thomas Domschke

A process for recovering crude 1,3-butadiene from a Cfraction by extractive distillation using a selective solvent in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column to form a first subregion (A), a second subregion (B) and a lower common column region (C) and which is preceded by an extractive scrubbing column (K) is proposed.

[object Object]

A process for obtaining pure 1,3-butadiene from crude 1,3-butadiene by distillation is carried out in a dividing wall column in which a dividing wall is located in the longitudinal direction of the column to form an upper common column region, a lower common column region, a feed section and an offtake section.

Method and device for obtaining 1,3 pure butadiene from 1,3 raw butadiene by distillation

The invention relates to a catalyst which contains a catalytically active quantity of at least one oxygen-containing molybdenum and/or wolfram compound on an oxidic support material and which has been calcinated at temperatures of 400 to 900&#xb0; C. after the precursor compound of the catalytically active compounds have been applied to the support material or to a support material precursor. The transport pores for this catalyst each have a diameter of &#x3e;25 nm and a volume of at least 50 mm/g. The catalyst contains x &#x3bc;mol (wolfram and/or molybdenum)/mmolybdenum and/or wolfram, with 10.1&#x3c;x&#x3c;20.9 in relation to the finished catalyst, with the oxidic support material having a BET surface area of 135 to 220 m/g. Catalysts of this type are characterized by an acidity of at least 70 &#x3bc;mol/g at pKs&#x3c;&#x2212;3 in the dry state and are therfore very active. The invention also relates to a method for producing a catalyst of this type and to the preferred use thereof.

Catalyst and method for producing polytetrahydrofurane

Method for the single-step production of polytetrahydrofuran and tetrahydrofuran copolymers

Methacrolein is removed from a gaseous mixture by absorption by means of an aqueous solution which contains from 60 to 90% by weight of methacrylic acid.

Removal of methacrolein from a gaseous mixture

Growing community of inventors

Malsch, Germany

Gerd Bohner