Basf Aktiengesellschaft

Basf Se Corporation

Roland Krokoszinski

Wolfgang Richter

Rolf Müller

Detlef Kratz

Rainer Papp

Heinrich-Josef Blankertz

Bernhard Geissler

Rolf M&uuml;ller

Willi Schönmann

Karl-Heinz Walczuch

Ulrich Hammon

Alexander Weck

Harald Rust

Michael Röper

Sven Crone

Jens Rudolph

Heinz Engelbach

Wolfgang Franzischka

Martin Decker

Steffen Oehlenschläger

Armin Volker Grenacher

Till Blum

Armin Ulonska

Helmut Walz

Franz Borgel

Kevin Scott Todd

Siegmar Maassen

Michael Richard McAtee

Volker Helf

Oliver Ryll

Steffen OEHLENSCHLÄGER

Siegmar Maaßen

The present invention relates to a process for heat integration in the preparation of saturated C-C-alcohols, in which a hydrogenation feed comprising at least one C-C-aldehyde is hydrogenated in the presence of a hydrogen-comprising gas in a hydrogenation zone and a discharge is taken off from the hydrogenation zone and subjected to distillation in at least one distillation column to give a fraction enriched in saturated C-C-alcohols.

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The present invention relates to a process for the catalytic aldol condensation of aldehydes, in particular for preparing &#x3b1;,&#x3b2;-unsaturated aldehydes, in a multiphase reactor.

Process for the catalytic aldol condensation of aldehydes

A process for preparing oligomers by continuous oligomerization of butenes is described, wherein a) a feed stream 1) comprising 1-butene and 2-butene in a total concentration of from 10 to 70% by weight and from 10 to 60% by weight of isobutane is reacted until more than 60% by weight of the 1-butene comprised in the feed stream 1 but less than 50% by weight of the 2-butene comprised in feed stream 1 have been converted into oligomers. b) The oligomers obtained in a) are separated off and optionally passed to a further work-up and the remaining residual stream is fed to work-up by distillation. c) Isobutane is separated off by distillation from the residual stream, and d) the isobutane-depleted stream obtained after the work-up by distillation c) is reacted to form oligomers.

Process for preparing oligomers of butene

Process for the treatment of wastewater from an aldolization process which is contaminated with water-soluble and/or dispersed organic impurities by means of single-stage or multistage extraction with an organic liquid of the aldolization process wastewater which has been set to a pH of from 0 to 6, in which an organic liquid obtained by stripping of the acidified aldolization process wastewater or of the acidified and extracted aldolization process wastewater, condensation of the stripped compounds and phase separation of the condensate is used as extractant for the extraction of organic impurities from the acidified aldolization process wastewater and wastewater having a lower content of organic impurities than the aldolization process wastewater fed to the extraction is taken off from the stripping apparatus.

Process for the treatment of wastewater from aldolization processes

The invention relates to a hydroformylation process in which at least one olefin having from 2 to 6 carbon atoms is reacted continuously with carbon monoxide and hydrogen in the presence of a hydroformylation catalyst in a reaction zone in which a liquid phase is present and a stream S) is taken from the liquid phase, heat is removed from this stream and the stream is subsequently returned to the reaction zone without removal of a material component.

Method for the hydroformylation of olefins with 2 to 6 carbon atoms

Olefins having from 2 to 8 carbon atoms are hydroformylated in a process in which (i) an olefin-containing feed in which a proportion of a saturated hydrocarbon having from 2 to 8 carbon atoms is present and also carbon monoxide and hydrogen are fed into a reaction zone and reacted in the presence of a hydroformylation catalyst, (ii) a stream consisting essentially of unreacted olefin and saturated hydrocarbon is separated off from the output from the reaction zone, (iii) the stream is separated into an olefin-enriched fraction and an olefin-depleted fraction by rectification, and (iv) at least part of the olefin-enriched fraction is recirculated to the reaction zone.

Method for the hydroformylation of olefins comprising 2 to 8 carbon atoms

A process for preparing hydroformylation products of olefins having from 2 to 8 carbon atoms comprises The proposed coupling of the hydroformylation with, for example, a steam cracker allows complete hydroformylation of the olefins produced without olefin losses via the waste gas.

Method for producing hydroformylation products of olefins with 2 to 8 carbon atoms

A process for preparing hydroformylation products of propylene and for preparing acrylic acid and/or acrolein comprises a) feeding a propylene-containing feed in which from 2 to 40% by weight of propane is present and also carbon monoxide and hydrogen into a reaction zone and reacting this mixture in the presence of a hydroformylation catalyst to form hydroformylation products of propane, b) separating a stream consisting essentially of unreacted propylene and propane from the output from the reaction zone, and c) subjecting the stream consisting essentially of propylene and propane to a catalytic gas-phase oxidation in the presence of molecular oxygen to form acrylic acid and/or acrolein.

Method for producing propylene hydroformylation products and acrylic acid and/or acrolein

Essentially monounsaturated polyalkylenes having from 30 to 700 carbon atoms are continuously hydroformylated by a process in which i) a hydroformylation-active cobalt carbonyl catalyst is prepared from a catalyst precursor dissolved in an aqueous phase in the absence of the polyalkylenes, ii) the polyalkylenes are hydroformylated by means of synthesis gas in the presence of the cobalt carbonyl catalyst in a reaction zone, iii) the cobalt carbonyl catalyst is separated from the output from the reaction zone with at least partial reformation of the catalyst precursor and the catalyst precursor is recirculated to step i).

Method for the continuous hydroformylation of polyakenes having 30 to 700 carbon atoms

Disclosed is a method for the hydroformylation of olefins comprising 2 to 8 atoms, whereby a) an inflow containing olefins and a gas mixture containing hydrogen and carbon monoxide are fed into a reaction zone and reacted in the presence of a hydroformylation catalyst, b) the reaction product which is released from the raw hydroformylation product is redirected into the reaction zone during the extraction of a gaseous recovery flow. The inventive method is characterised in that c) the recovery flow is brought into intimate contact with a wash liquid in order to eliminate the unreacted olefins contained therein, the wash liquid being a vented hydroformylation product, and the olefin-charged wash liquid and the raw hydroformylation product are redirected for regeneration. Said inventive method enables unreacted olefins to be reclaimed to a large extent from the recovery flow.

Method for the hydroformylation of olefins comprising 2 to 8 carbons atoms

Method for processing a liquid hydroformylation discharge

Preparation of 1,3-diols

Process for recycling a liquid hydroformylation discharge

Aromatic nitriles, in particular phthalodinitriles, are prepared from an appropriately alkyl-substituted aromatic hydrocarbon by catalytic oxidation with oxygen or an oxygen-containing gas in the presence of ammonia at elevated temperatures in the vapor phase, in the presence of a catalyst which contains from 2 to 10% by weight of vanadium(V) oxide, from 1 to 10% by weight of antimony(III) oxide, from 0.02 to 2% by weight of an alkali metal oxide and alumina, by a process in which from 0.01 to 1.0% by weight of an alkaline earth metal, or of a compound of an alkaline earth metal, in particular barium or a barium compound, is added to the catalyst.

Preparation of aromatic nitriles

Growing community of inventors

Weisenheim a.Berg, Germany

Roland Krokoszinski