Basf Aktiengesellschaft

Basf Se Corporation

Linde Aktiengesellschaft

Regina Benfer

Peter Zehner

Götz-Peter Schindler

Andreas Brodhagen

Thorsten Johann

Jan Pablo Josch

Alexander Weck

Ulrich Steinbrenner

Markus Weber

Sven Crone

Mark Duda

Thomas Hill

Marcus Sigl

Thomas Narbeshuber

Ulrike Wenning

Heinz Boelt

Hendrik Reyneke

Christine Toegel

Ragavendra Prasad Balegedde Ramachandran

Sonja Giesa

Andreas Kramer

Toni Dockner

Gerhard Olbert

Christian Walsdorff

Alexander Panchenko

Maximilian Vicari

Grigorios Kolios

Anton Wellenhofer

Peter Pfab

Marco Bosch

Ralf Schulz

Mathias Haake

Klaus Breuer

Stefan Birnbach

Nils Bottke

J&ouml;rg Therre

Albena Kostova

Jarren Peters

Michael Nilles

Andreas Weiper-Idelmann

Philipp Grüne

Werner Weinle

Andreas Weickgenannt

Jan-Oliver Weidert

Juergen Stephan

Ralph Busch

J&uuml;rgen Mohr

Jürgen Stephan

Walter Bieg

Norbert Gutfrucht

Dieter Stützer

Hans-Georg G&ouml;bbel

Stefan Berg

Alireza Rezai

Andre Biegner

Sandra Kramp

Artur Kozicki

Soeren Zimdahl

Bernd Ruge

Jörn Müller

Jochen Götz

Gergor Bloch

Michael Schulik

J&uuml;rgen Schossig

Steffen Bütehorn

Gregor Bloch

Joerg Unger

Aristides Morillo

The invention relates to a process for producing butadiene from n-butenes which comprises the steps of:

Process for preparing 1,3-butadiene from n-butenes by oxidative dehydrogenation

A process for preparing trans-enriched MDACH, including: distilling an MDACH starting mixture in the presence of an auxiliary, which is an organic compound having a molar mass of 62 to 500 g/mol, a boiling point at least 5&#xb0; C. above the boiling point of cis,cis-2,6-diamino-1-methylcyclohexane, and 2 to 4 functional groups, each of which is independently an alcohol group or a primary, secondary or tertiary amino group. The MDACH starting mixture includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, based on the total amount of MDACH present in the MDACH starting mixture. The MDACH starting mixture includes both trans and cis isomers. Trans-enriched MDACH includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, where the proportion of trans isomers in the mixture is higher than the proportion of trans isomers in the MDACH starting mixture.

Method for producing cis- and trans-enriched MDACH

The invention relates to a process for preparing butadiene from n-butenes, comprising the steps of:

A process for the oxidative dehydrogenation of n-butenes to butadiene is disclosed herein, in which the formation of butadiene peroxides from butadiene in the work-up of the product gas mixture from the oxidative dehydrogenation is effectively prevented.

Process for the oxidative dehydrogenation of N-butenes to butadiene

The process for preparing butadiene from n-butane comprises the steps of

Process for preparing butadiene and/or butenes from n-butane

The invention relates to a process for workup of a stream () comprising butene and/or butadiene, butane, hydrogen and/or nitrogen and carbon dioxide, comprising:

Process for workup of a stream comprising butene and/or butadiene

In a process for the preparation of alkylaromatic compounds by reacting C-olefins, or alcohols from which C-olefins are formed under the reaction conditions, with an aromatic hydrocarbon in the presence of an alkylation catalyst, the reaction is carried out in a reactor cascade of at least two reactors, where each of the reactors comprises the alkylation catalyst, at least 80% of the aromatic hydrocarbon are fed into the first reactor of the reactor cascade, and at least 40% of the olefins are intermediately fed in after the first reactor.

Method for producing alkyl aromatic compounds

In a process for preparing alkylaryl compounds by reacting a C-monoolefin mixture with an aromatic hydrocarbon in the presence of an alkylation catalyst to form alkyl aromatic compounds and if appropriate subsequently sulfonating and neutralizing the resulting alkylaryl compounds, in the C-monoolefins, on average, more than 0% and up to 100% of methyl branches are present in the longest carbon chain and fewer than 50% of the methyl branches are in the 2-, 3- and 4-position, calculated starting from the chain ends of the longest carbon chain.

Method for producing alkylaryl compounds and alkylaryl sulphonates

The disclosure involves a process for the preparation of butadiene and 1-butene. The process includes at least a first catalytic dehydrogenation of n-butane to obtain a gas stream which is followed by at least a second oxidative dehydrogenation to form a second gas stream. The second gas stream is then subjected to distillation and isomeration steps to obtain butadiene and 1-butene.

Method for the production of butadiene and 1-butene

A process for preparing 1-butene, which includes nonoxidatively, catalytically dehydrogenating n-butane to obtain a product gas stream of n-butane, 1-butene, 2-butene, butadiene, hydrogen, and secondary constituents; removing hydrogen and the secondary constituents to obtain a Cproduct gas stream; separating the Cproduct stream into a recycle stream of n-butane and a stream of 1-butene, 2-butene and butadiene by extractive distillation, and recirculating the recycle stream to the dehydrogenation zone; introducing the 1 -butene, 2-butene and butadiene stream into a selective hydrogenation zone and selective hydrogenation of butadiene to 1-butene and/or 2-butene to obtain a stream of 1-butene and 2-butene; introducing the 1-butene and 2-butene stream, and a circulating stream of 1-butene and 2-butene into a distillation zone and isolation of a product stream; and introducing the 2-butene-containing stream into an isomerization zone to obtain a circulating stream of 1-butene and 2-butene, and recirculating the circulating stream to the distillation zone.

Method for producing 1-butene

The disclosure relates to a process for preparing butadiene. The process involves nonoxidatively catalytically dehydrogenating butane to obtain a product gas stream containing butane, 1-butene, 2-butene, butadiene, hydrogen and secondary constituents. The 1-butene and 2-butene of the product gas stream is then oxidatively dehydrogenated to give a second gas stream containing butane,2-butene, butadiene, hydrogen, steam and secondary constituents. Next, the butane,2-butene and butadiene are separated from the second gas stream and the butane and 2-butene are then separated from the butadiene product. The butane and 2-butene are then recycled into the nonoxidative catalytic dehydrogenating zone.

Preparation of butadiene

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

The present invention relates to a continuous process for the preparation of cinnamaldehyde or cinnamaldehyde derivatives by continuous reaction of benzaldehyde derivatives with alkanals in the presence of bases and optionally subsequent continuous hydrogenation in a circulation reactor in the presence of a suspension catalyst and hydrogen to give dihydrocinnamaldehyde derivatives.

Continuous method for production of cinnamaldehyde and dihydrocinnamaldehyde derivatives

A process for the continuous production of 1,3-dioxolan-2-ones such as ethylene carbonate or propylene carbonate by reacting a corresponding oxirane with carbon dioxide in the liquid phase in the presence of a catalyst comprises conducting the reaction in a two-part reactor in whose first part the reaction is taken with backmixing to a conversion of not less than 80% of the oxirane II and in whose second part the reaction is completed under nonbackmixing conditions, and passing the carbon dioxide in countercurrent to the oxirane II in the entire reactor.

Method for the continuous production of 1,3-dioxolan-2-ones

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Altrip, Germany

Regina Benfer