Basf Aktiengesellschaft

Basf Se Corporation

Construction Research & Technology Gmbh

Fluitec Invest Ag

Andreas Brodhagen

Götz-Peter Schindler

Thomas Hill

Thorsten Johann

Markus Schubert

Frank Poplow

Eckhard Stroefer

Sven Crone

Mark Duda

Andreas Woelfert

Regina Benfer

Vinit Chilekar

Michael Hesse

Michael Röper

Filip Nevejans

Marcus Sigl

Martin Sohn

Hermann Luyken

Robert Baumann

Hartwig Voss

Gerd Haderlein

Michael Bartsch

Jens Scheidel

Oliver Bey

Tim Jungkamp

Gerhard Cox

Till Gerlach

Thomas Ostrowski

Ulrich Penzel

Wolfgang Mackenroth

Wolfgang Loth

Achim Loeffler

Christian Mueller

Hans-Juergen Pallasch

Andreas Wölfert

Juergen Stephan

Jürgen Stephan

Fatemeh Ahmadnian

Volker Boehm

Karl-Heinz Wassmer

Gerrit Waters

Hermann Graf

Mario Vierle

Dirk Meckelnburg

Steffen Oehlenschlaeger

Uwe Diehlmann

Christian Schwede

Gerd Konrad

Markus Maurer

Jelan Kuhn

Rene Leuthold

Alain Georg

Christoph Grossmann

Ronald Adelmann

Daniel Altenburger

Ann De Colvenaer

Martina Sinner-Lang

Jochen Pfeifer

Milind Joshi

Ulrich Kammel

Ralf Bohling

Fatemeh Admadnian

Achim Loffler

Günter Kaiser

Hartwig Voß

Michael Tribelhorn

Faissal-Ali El-Toufalli

Ralf BÖHLING

Ann De Colvanaer

Christoph GROßMANN

Volker Böhm

The present invention relates to a process for the continuous preparation of polymers in a polymerization apparatus, where the starting materials comprise at least one olefinically unsaturated polyether macromonomer and at least one olefinically unsaturated acid monomer and at least one free-radical initiator and the polymerization is carried out at temperatures in the range from &#x2212;20 to +120&#xb0; C., wherein the polymerization apparatus comprises at least one loop reactor which has at least one feed line for the starting materials and at least one outlet, where the loop reactor comprises at least one reaction zone which comprises internal cooling and mixing elements and which has a volume-based heat removal power of at least 10 kW/m&#xb7;K. Furthermore, the use of the polymer of the invention as dispersant for hydraulic binders is disclosed.

Continuous process for preparing copolymers

The invention relates to a process for working-up a reaction mixture () comprising polyetherol and dissolved alkali metal comprising catalyst, wherein at least alkali metal ions of the dissolved alkali metal comprising catalyst are partially or completely removed from the mixture by a membrane separation process, the process comprising following steps:

Process for working-up a reaction mixture comprising polyether polyol

A process for a continuous production of a polyetherol first involves reacting a catalyst () with an alcohol starter () or an alkoxylated precursor, to give a mixture comprising an alcoholate and water. Water is then removed from the mixture. The process further involves feeding the alcoholate into a bubble column and feeding an alkylene oxide into the bottom of a compartment of the bubble column, such that the alkylene oxide rises in the alcoholate. The alkylene oxide then reacts with the alcoholate or a secondary product from the reaction between the alcoholate and alkylene oxide, to give the polyetherol.

Process for a continuous production of polyetherols

The invention relates to a process for preparing polyisocyanates by reacting primary amines with phosgene, which comprises the steps

Method for producing polyisocyanates

The present invention relates to a process for the catalytic preparation of polyetherols, wherein the power input by means of at least one stirrer and/or by means of at least one pump, based on the reactor volume, is in the range from 0.001 to 8.2 kW/m.

Process for preparing polyether polyols

A C4-olefin mixture having a 1,3-butadiene content of from 100 to 500 ppm and a content of 1,2-dienes of less than 10 ppm is described. The present invention further provides a process for preparing this C4-olefin mixture and provides for its use in a metathesis reaction for preparing 2-pentene and/or 3-hexene.

Process for preparing a C4-olefin mixture by selective hydrogenation and metathesis process for using this stream

The present invention relates to a method for reducing residual volatiles from polymer compositions.

Deodorization of polymer compositions

The invention relates to a process for preparing polyisocyanates by reacting organic amines with phosgene, wherein the reaction is carried out in at least three stages, with the first stage being carried out in a mixing apparatus, the second stage in at least one residence apparatus and the third stage in at least one separation apparatus and the pressure in each successive stage being lower than that in the previous stage.

Method for the continuous production of isocyanates

The present invention provides a process for preparing a supported catalyst (catalyst C) having a support (support S) selected from among oxides, phosphates, silicates, carbides, borides and nitrides of main group elements and elements of transition groups VI and II and mixtures of the abovementioned compounds and an active component (activator A) comprising one or more compounds containing one or more elements of transition groups V, VI and VII customary for the catalysis of metathesis reactions.

Activated metathesis catalysts

A process is described for hydrocyanating 1,3-butadiene over at least one nickel(0) complex having phosphorus ligands as a catalyst, wherein the 1,3-butadiene is used in a mixture with n-butane and the mixture contains from 60 to 90% by volume of 1,3-butadiene and from 40 to 10% by volume of n-butane.

Method for the production of pentene nitriles from n-butane

A process for preparing 1-butene from 1-butane, which includes providing a n-butane-containing feed gas stream; introducing of the n-butane-containing feed gas stream into at least one dehydrogenation zone and nonoxidative catalytic dehydrogenation of n-butane; removing hydrogen, the low-boiling secondary constituents and optionally water vapor to give a Cproduct gas stream containing 10-80% by volume of n-butane, 5-40% by volume of 1-butene, 10-50% by volume of 2-butene, 0-40% by volume of butadiene and 0-10% by volume of further gas constituents; introducing the Cproduct gas stream containing 10-80% by volume of n-butane, 10-60% by volume of 1-butene, 15-60% by volume of 2-butene, 0-5% by volume of butadiene and 0-10% by volume of further gas constituents, into a selective hydrogenation zone and selective hydrogenation of butadiene to 1- and/or 2-butene to give stream consisting essentially of n-butane, 1-butene and 2-butene; and separating of the stream distillation into a desired product.

Process for preparing 1-butene

The disclosure involves a process for preparing butadiene from n-butane. In the process, n-butane is first dehydrogenated autothermally under nonoxidative conditions to form a gas stream. The gas stream is then oxidatively dehydrogenated to form a second gas stream. From the second gas stream, a third gas stream containing n-butane, 2-butene and butadiene is obtained. From the third gas stream, a butadiene/butaine product stream is obtained and remaining n-butane and 2-butene is recycled into the first dehydrogenation zone.

Method for the production of butadiene

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

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Dannstadt-Schauernheim, Germany

Andreas Brodhagen