Basf Se Corporation

Basf Aktiengesellschaft

Ulrich Cremer

Klaus Joachim Mueller-Engel

Andreas Raichle

Frank Rosowski

Jochen Petzoldt

Holger Borchert

Ulrich Hammon

Martin Dieterle

Catharina Horstmann

Volker Schliephake

Klaus Joachim Müller-Engel

Gerhard Cox

Hagen Wilmer

Rolf-Dieter Becher

Klaus Bott

Ulrike Wegerle

Cornelia Katharina Dobner

Hermann Petersen

Stefan Altwasser

Thorsten Friese

Gerhard Laqua

Sabine Huber

Tim Blaschke

Horst Strahberger

The invention relates to a crossflow tray for a mass transfer column () in which a gas is conducted in countercurrent to a liquid, the crossflow tray () having passage orifices () for the gas and at least two downcomers (), the downcomers () projecting beyond the top surface of the crossflow tray () and a collecting cup () being disposed beneath each downcomer (). The downcomer () projects into the collecting cup (), the minimum horizontal cross-sectional area of the collecting cup () is 1.2 to 4 times greater than the horizontal cross-sectional area of the downcomer () at the outlet, and the collecting cup () has a circumferential wall () having an overflow (). The invention further relates to a mass transfer column comprising the crossflow trays and to a use of the mass transfer column.

Crossflow tray for a mass transfer column, mass transfer column and use of the mass transfer column

A process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed, in which a heterogeneously catalyzed partial gas phase oxidation of an organic compound had been performed beforehand in a preceding fixed catalyst bed comprising Mo-comprising multielement oxide active compositions to form a steam-comprising product gas mixture, in which, before the recharge, solid deposit which had been deposited on the tube inner walls and comprises molybdenum oxide and/or molybdenum oxide hydrate is brushed away with the aid of a brush.

Process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed

A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry[BiWO][MoZZFeZZZO],in which a finely divided oxide BiWOwith the particle size dand, formed from element sources, a finely divided intimate mixture of stoichiometry MoZZFeZZZwith the particle size dare mixed in a ratio of a:1, this mixture is used to form shaped bodies and these are treated thermally, where (d)&#xb7;(d)&#xb7;(a)&#x2267;820. A shaped catalyst body obtained by the process. A catalyst obtained by grinding the shaped catalyst body. A process for heterogeneously catalyzing the partial gas phase oxidation of an alkane, alkanol, alkanal and/or an alkenal of 3 to 6 carbon atoms using the catalyst.

Process for producing geometric shaped catalyst bodies

A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry[BiWO][MoZZFeZZZO],in which a finely divided oxide BiWOwith the particle size dand, formed from element sources, a finely divided intimate mixture of stoichiometry MoZZFeZZZwith the particle size dare mixed in a ratio of a:1, this mixture is used to form shaped bodies and these are treated thermally, where (d)&#xb7;(d)&#xb7;(a)&#x2267;820.

A process for preparing shaped catalyst bodies whose active composition is a multielement oxide, in which a finely divided precursor mixture with addition of graphite having a specific particle size is shaped to the desired geometry and then treated thermally.

Process for preparing shaped catalyst bodies whose active composition is a multielement oxide

A process for charging a reactor with a fixed catalyst bed which comprises at least one annular shaped support catalyst body K, in which, before the charging, fragments formed in the preparation of the shaped catalyst bodies K are removed by screening.

Process for charging a reactor with a fixed catalyst bed which comprises at least annular shaped catalyst bodies K

A process for preparing a coated catalyst in which a finely divided mixture of a multielement oxide comprising the elements Mo and V and a molybdenum oxide or a molybdenum oxide former is applied to the surface of a support body as an active composition.

Process for preparing a catalyst consisting of a support body and a catalytically active composition applied on the surface of the support body

A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry[BiZO][BiMoFeZZZZZO],

A process for the long-term operation of a heterogeneously catalyzed partial gas phase oxidation of an organic starting compound, in which the reaction gas input mixture is partially oxidized over a fixed catalyst bed which is accommodated in two successive temperature zones A, B whose temperature is changed with increasing operating time such that the initially lower temperature increases and the difference between the two temperatures decreases.

Process for the long-term operation of a heterogeneously catalyzed partial gas phase oxidation of an organic starting compound

A process for preparing a multielement oxide composition comprising the element iron in oxidic form, in which the source of the elemental constituent of iron used is an aqueous iron nitrate solution whose preparation comprises the melting of a solid hydrate of iron nitrate.

Process for preparing a multielement oxide composition comprising the element iron in oxidic form

A process for starting-up a heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid or of methacrolein to methacrylic acid over a fixed catalyst bed disposed in a tube bundle reactor cooled by a heat exchange medium, wherein the temperature of the heat exchange medium is &#x2267;290&#xb0; C. and the temperature of that reactor plate surface which faces the reaction gas entry mixture and the temperature of the reaction gas entry mixture itself are &#x2266;285&#xb0; C.

Process for starting-up a heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid or of methacrolein to methacrylic acid

A process for introducing annular coated catalysts K into a reaction tube of a tube bundle reactor, in which adhering pairs of annular coated catalysts K formed in the preparation of the annular coated catalysts K, before the introduction thereof into the reaction tube, are removed at least partly from the annular coated catalysts K.

Process for introducing a portion withdrawn from at least one production charge of annular coated catalysts K into a reaction tube of a tube bundle reactor

The present invention relates to a process for charging a reactor with a catalyst, to the resulting charged reactors, and to the use thereof for carrying out catalytic gas phase reactions.

Growing community of inventors

Mannheim, Germany

Ulrich Cremer