Basf Se Corporation

Basf Aktiengesellschaft

Armin Ulonska

Thomas Heidemann

Arno Lange

Rocco Paciello

Peter Zehner

Jens Rudolph

Rainer Papp

Volker Wendel

Edgar Zeller

Roland Krokoszinski

Steffen Oehlenschläger

Arthur Höhn

Volker Uhrig

Bianca Stäck

Reimund Fattler

Rene Magnie

Steffen OEHLENSCHLÄGER

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

The present invention relates to a method of supplementing the catalyst in continuous hydroformylation during ongoing operation.

Method of supplementing the catalyst in continuous hydroformylation

The present invention relates to an isoalkane mixture, to a method for its preparation and to cosmetic or pharmaceutical compositions which comprise such a mixture.

Isoalkane mixture, its preparation and use

Olefins are oligomerized by bringing at least one Cto C-olefin into contact with a nickel-containing heterogeneous catalyst. The catalyst is conditioned before contact with the olefin by passing an inert gas flow over the same, until the inert gas flow has a water content of less than 1000 ppm. Selectivity for the production of higher oligomers, in particular trimers relative to the formation of dimers is increased by the pretreatment.

Oligomerisation of olefins

Process for preparing oligomers of alkenes having from 4 to 8 carbon atoms from a feed stream comprising such alkenes or hydrocarbon streams in which such alkenes are present over a nickel-containing, heterogeneous catalyst in n successive adiabatically operated reactors, where n is 2 or an integer greater than 2, at from 30 to 280&#xb0; C. and pressures of from 1 to 300 bar, where the feed stream has a temperature Twhen it enters the first reaction zone, experiences a temperature increase in each reaction zone and, if this temperature increase is more than T+20&#xb0; C., is brought to a temperature in the range T&#xb1;20&#xb0; C. before it enters a subsequent reaction zone, wherein the feed stream is divided and the feed substreams obtained in this way are fed to the 2 reactors, or if more than 2 reactors are used to at least 2 of the reactors, with addition of fresh feed in such a way that the temperature in one of the reactors is at most 20&#xb0; C. higher than that in each of the other reactors used.

Preparation of oligomers of alkenes having from 4 to 8 carbon atoms

A process for the preparation of aldehydes and/or alcohols or amines by reacting olefins in the liquid phase with carbon monoxide and hydrogen, a part of these gases being dispersed in the form of gas bubbles in the reaction liquid and another part being dissolved in the reaction liquid, in the presence or absence of a primary or secondary amine and in the presence of a cobalt carbonyl, rhodium carbonyl, palladium carbonyl or ruthenium carbonyl complex dissolved homogeneously in the reaction liquid and having a phosphorus-, arsenic-, antimony- or nitrogen-containing ligand, at elevated temperatures and at 1 to 100 bar, wherein the reaction is carried out in a vertically arranged, tubular reactor comprising a reactor body and at least one circulation line, a part of the reaction liquid is fed continuously via the circulation line to at least one nozzle which is mounted in the upper part of the reactor body and is coordinated with a guide member, open at the top and bottom and bounded by parallel walls, in the interior of the reactor and with a baffle present below the lower opening of the guide member, and a downward-directed liquid stream containing dispersed gas bubbles is produced by means of this nozzle in this guide member and, after leaving the guide member, is deflected into a stream flowing upward in the space between the wall of the guide member and the wall of the reactor body and is sucked into the guide member at the upper end of the guide member by the jet of the nozzle coordinated with the guide member.

Method for producing aldehydes and/or alcohols or amines

Growing community of inventors

Niederkirchen, Germany

Armin Ulonska