Oxea Corporation

Oxea Bishop LLC

Oxga Gmbh

Mapei Spa

Oq Chemicals Corporation

Heinz Strutz

Guido D Frey

Kurt Schalapski

Thorsten Kreickmann

Matthias Eisenacher

Norman Nowotny

Tonia Weber

Leif Johnen

Jörg Arnold

Kristina Kockrick

Peter Heymanns

Donald K Raff

Dirk Bermann

Jens Theuerkauf

William E Slinkard

Horst Lange

Christoph Balzarek

Marcos L Schroeder

Fred Gaytan

Jens Kubitschke

Sebastian Geisel

Rainer Lukas

Horst Scholz

Arno Behr

Alexander Kaufmann

Oliver Borgmeier

Matthias Kramer

Jacco De Haas

Wolfgang Höfs

Thomas Müller

Gregor Meier

Elias Klemm

Heyko Jürgen Schultz

Rolf-Peter Schulz

Norman Nowotney

Tracy Kevin Hunt

Diana Utz

Claudia Liebold

Melanie Bothe

Thomas Hupperich

Tracy Kevin Hung

Daniel Kadzimirsz

Jan-Henry Rahe

Ruben Fernandez Diaz

Antonietta Schiro

Tito Zanetta

Michael J Stone

Olivier Borgmeier

Howard W Brooks

Andreas Johannes Vorholt

Sarah Fuchs

Markus Oswald

The present invention relates to the continuous production of 2-methylene alkanals in a tube reactor, wherein in the 2-position non-branched alkanals are reacted with formaldehyde under acid-base catalysis in the presence of secondary amines and carboxylic acids under laminar flow conditions.

Continuous production method for 2-methylene alkanals

The present invention relates to a process for simultaneously consecutive preparation of polyols by base-catalyzed reaction of at least two different mid-chain aldehydes with formaldehyde. The simultaneous consecutive mode of operation makes it possible to achieve high conversions and high selectivities for both aldehydes, with additional achievement of a distinct reduction in the amount of unreacted formaldehyde remaining. This leads to improved process economics, since the energy costs for workup of the formaldehyde stream are distinctly reduced.

Method for the combined production of polyols in the presence of an inorganic base

A process for preparing 2-methylbutyric acid having a reduced content of 3-methylbutyric acid from the secondary streams obtained in the preparation of pentanoic acids, includes generating a stream enriched with 2-methylbutanal and 3-methyl-butanal. The stream enriched with 2-methylbutanal and 3-methylbutanal of step is reacted with formaldehyde. The reaction with formaldehyde is followed by removal of the organic phase and selective hydrogenation in the presence of a hydrogenation catalyst with hydrogen at elevated temperature and elevated pressure and, after removal of the hydrogenation catalyst, treatment of the hydrogenation output obtained with an oxidizing agent.

Method for producing 2-methylbutyric acid having a reduced content of 3-methylbutyric acid from the secondary flows arising in the production of pentanoic acids

A process for obtaining product streams enriched with polyol esters from the secondary streams from polyol ester preparation, comprising

Method for obtaining polyol esters-enriched product streams from the side-streams in polyol ester production

Distillative process for obtaining ditrimethylolpropane from solutions includes separating ditrimethylolpropane from the solution in a first distillation unit into a first tops fraction comprising low-boiling compounds having a lower boiling point than ditrimethylolpropane and a first bottoms fraction; introducing the first bottoms fraction into a second distillation unit having at least 5 theoretical plates, said unit being configured as a thin-film evaporator with a column attachment and drawing off a second tops fraction comprising intermediate-boiling compounds having a lower boiling point than ditrimethylolpropane as well as withdrawing a second bottoms fraction from the second distillation unit and introducing the second bottoms fraction into a third distillation unit having at least 4 theoretical plates, said unit being configured as a thin-film evaporator with a column attachment, such that ditrimethylolpropane is obtained as a third tops fraction and high boilers are removed as a third bottoms fraction.

Method for recovering di-trimethylolpropane by distillation

Process for preparing isononylamines starting out from 2-ethylhexanol, characterized in that (a) 2-ethylhexanol is dehydrated in the presence of a catalyst to form octene; (b) the octene obtained in step a) is reacted with carbon monoxide and hydrogen in the presence of a transition metal compound of group VIII of the Periodic Table of the Elements to form isononanal; and (c) the isononanal obtained in step b) is converted into isononylamines.

Isononylamines from 2-ethylhexanol, processes for their preparation, and their use

A process for producing a mixture comprising tertiary isononanoic acids proceeding from 2-ethylhexanol is characterized in that 2-ethylhexanol is (a) reacted at a temperature of 0&#xb0; C. to 40&#xb0; C. with a mixture of concentrated formic acid and a concentrated Br&#xf8;nsted acid, wherein 2 to 10 mol of formic acid are used per mole of 2-ethylhexanol and the concentrated Br&#xf8;nsted acid is used in an amount that corresponds to 6 to 90 mol of protons per mole of 2-ethylhexanol. The resulting reaction mixture from step (a) is subsequently (b) brought into contact with water, and the mixture comprising tertiary isononanoic acids formed according to step b) is removed.

Method for the production of mixtures containing tertiary isononanoic acids based on 2-ethylhexanol

A multistage tubular reaction system and method for preparing methylol derivatives of an aldehyde includes a tubular reaction system with a plurality of successive reactor stages comprising a plurality of jacketed reaction tubes provided with a cooling system adapted to control flow of a cooling medium through said jacketed reaction tubes. The cooling medium flow is controlled independently in different stages in response to temperature measurements in the reaction system to regulate temperature. In order to further reduce temperature spikes and byproduct generation, aldehyde is stepwise added to the production stream at a plurality of feed ports proximate to reaction tubes equipped with tube inserts to enhance mixing and heat transfer.

Manufacture of methylolalkanes with augmented heat transfer and improved temperature control

A batchwise process for aftertreatment of polyol esters prepared by reacting polyols of the general formula (II)H&#x2014;(&#x2014;O&#x2014;[&#x2014;CRR&#x2014;]&#x2014;)&#x2014;OH&#x2003;&#x2003;(II)in which Rand Rare each independently hydrogen, an alkyl radical having 1 to 5 carbon atoms, preferably methyl, ethyl or propyl, or a hydroxyalkyl radical having 1 to 5 carbon atoms, preferably the hydroxymethyl radical, m is an integer from 1 to 10, preferably 1 to 8 and especially 1, 2, 3 or 4, o is an integer from 2 to 15, preferably 2 to 8 and especially 2, 3, 4 or 5, with excess linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms and having a lower boiling point than the polyols used. The process is carried out in the presence of a Lewis acid and in the presence of an adsorbent, while removing the water formed, characterized in that the excess monocarboxylic acid is removed by distillation and water is added to the crude ester obtained at a temperature below the boiling point of water at the particular pressure and the crude ester with added water is aftertreated with avoidance of basic compounds, and the sparingly soluble conversion products and the adsorbent present in the esterification reaction are filtered off.

Method for post-treating polyol esters

A mixture useful as plasticizer comprises trimellitic esters and polyether polyol esters, characterized in that the mixture comprises from 1 to 99% by weight of trimellitic esters and 99 to 1% by weight of polyether polyol esters, wherein the polyether polyol esters can be derived from linear or branched, aliphatic monocarboxylic acids having 3 to 20 carbon atoms in the molecule.

Mixtures containing trimellitic acid ester and polyether polyol ester as plasticizers, use of the mixtures for producing polymer compounds and PVC   materials containing said mixtures

A process for preparing 2-methylbutanal from the secondary streams obtained in the preparation of mixtures of isomeric &#x3b1;,&#x3b2;-unsaturated decenals, characterized in that a) a mixture comprising linear butenes is reacted in the presence of transition metal compounds of group VIII of the Periodic Table of the Elements with carbon monoxide and hydrogen at elevated temperature and elevated pressure to give a pentanal mixture; b) the pentanal mixture obtained in step a) is converted in the presence of basic compounds to a mixture of isomeric &#x3b1;,&#x3b2;-unsaturated decenals; and c) the mixture obtained in step b) is separated into a stream enriched with unconverted 2-methylbutanal and a stream enriched with a mixture of isomeric &#x3b1;,&#x3b2;-unsaturated decenals; with the proviso that the stream which has been separated off in step c) and is enriched with unconverted 2-methylbutanal is reacted with formaldehyde.

Method for producing 2-methylbutanal from the secondary flows arising in the production of mixtures of isomeric alpha, beta-unsaturated decenals

A process for preparing isomeric hexanoic acids comprising 2-methylpentanoic acid from the secondary streams obtained in the preparation of pentanals, characterized in that a) a mixture comprising linear butenes is reacted to give a pentanal mixture; b) the mixture obtained in step a) is separated into a stream enriched with 2-methylbutanal and 3-methyl-butanal, and a stream enriched with n-pentanal; c) the stream enriched with 2-methylbutanal and 3-methylbutanal of step b) is reacted with formaldehyde; d) the reaction mixture obtained after step c) is selectively reacted to give a mixture comprising 2-methylbutanal and isomeric hexanals; e) the reaction mixture is separated into a stream enriched with 2-methylbutanal and a stream enriched with a mixture of isomeric hexanals; and f) the mixture of isomeric hexanals obtained in step e) is oxidized to a mixture of isomeric hexanoic acids comprising 2-methylpentanoic acid.

Method for producing isomeric hexanoic acids from the subsidiary flows arising during the production of pentanals

A Process for preparing carboxylic esters of a mixture of structurally branched C9 monocarboxylic acids proceeding from 2-ethylhexanol is characterized in that

Method for producing isononanoic acid esters, starting from 2-ethyl hexanol

Process for preparing isononanoic acid proceeding from 2-ethylhexanol, characterized in that (a) 2-ethylhexanol is dehydrated to octene in the presence of a catalyst; (b) the octene obtained in step a) is reacted in the presence of a transition metal compound of group VIII of the periodic table of the elements with carbon monoxide and hydrogen to give isononanal; and (c) the isononanal obtained in step b) is oxidized to isononanoic acid.

Method for producing isononanoic acids from 2-ethyl hexanol

A multistage tubular reaction system and method for preparing methylol derivatives of an aldehyde includes a tubular reaction system with a plurality of successive reactor stages provided with a formaldehyde containing feed stream. The system includes multiple feed ports for the staged addition of Cor higher condensible aldehyde and/or base to the formaldehyde containing stream at a plurality of successive feed points to provide a production stream, which is progressively provided with additional reactants as the production stream advances through the successive reaction stages. Advantages include better temperature control and reduced byproduct formation.

Manufacture of methylolalkanes

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Moers, Germany

Heinz Strutz