Basf Aktiengesellschaft

Basf Se Corporation

Basfaktiengesellschaft

Basf Akteingesellschaft

Joachim Thiel

Juergen Schroeder

Volker Schliephake

Bernd Eck

Ulrich Hammon

Otto Machhammer

Theo Proll

Bernd Gerber

Klaus Br&ouml;llos

Markus Weber

Jürgen Schröder

Bernd Sachweh

Eckhard Ströfer

Albrecht Dams

Bernd Rumpf

Volker Diehl

Karl-Heinz Wostbrock

Steffen Kerth

Heinz Krüger

Klaus Joachim Mueller-Engel

Gerhard Nestler

Eckhard Stroefer

Claus Hechler

Klaus Joachim Müller-Engel

Michael Schulz

Dieter Baumann

Maximilian Vicari

Helmut Jansen

J&uuml;rgen Schr&ouml;der

Heinz Auer

Christoph Adami

Hans Martan

Markus Siegert

Jörg Heilek

Neven Lang

Karl Fischer

Hans Hammer

Björn Kaibel

J&ouml;rg Heilek

Hugues Vandenmersch

Ulrich Jäger

Jochen Kellenbenz

Erik Bastiaensen

Jürgen Dahlhaus

Julia Kirschbaum

A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by

Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification

A process for rectificatively separating at least one (meth)acrylic monomer-containing fluid by feeding the fluid into a rectification column containing at least one sieve tray without a runoff segment, wherein

Method for the rectifying separation of fluids containing (meth)acryl monomers

A thermal separating process for removing a stream containing enriched (meth)acrylic monomers from a mixture containing (meth)acrylic monomers, in which the liquid phases retained in the separating space at high temperature and high (meth)acrylic monomer content are minimized.

Thermal separating process for removing at least one stream containing enriched (meth) acrylic monomers

A process for rectificatively separating fluids including (meth)acrylic monomers in a rectification column by directly cooling the vapor including (meth)acrylic monomers rising to the top of the rectification column to form top condensate including (meth)acrylic monomers, the condensation space at the top of the column being separated from the region of the rectification column containing the separating internals only by at least one chimney tray from which the top condensate formed is removed from the rectification column, which includes effecting the direct cooling of the vapor in the condensation space in at least two spray zones which are spatially successive and are flowed through by vapor by spraying supercooled top condensate including added polymerization inhibitor, and the temperature of the sprayed supercooled top condensate becoming lower from spray zone to spray zone in the flown direction of the vapor.

Rectificative separation of fluids comprising (meth) acrylic monomers

A column for the thermal treatment of mixtures which contain one or more polymerizable compounds is proposed, which column has dual-flow trays with openings whose diameter is constant within a dual-flow tray, the dual-flow trays having openings of decreasing diameter with increasing distance from the feed of the mixture to be treated.

Column comprising dual flow plates

A process for cleaning apparatus in which (meth)acrylic acid-containing organic solvents have been treated and/or generated and contain fouling and/or polymer and residues of organic solvent, in which the apparatus contents are subjected to a steam distillation in the apparatus.

Cleaning of apparatus in which meth(acrylic) acid-containing organic solvents have been treated and/or generated

In a thermal separating process between at least one gaseous and at least one liquid stream, of which at least one comprises (meth)acrylic monomers, in a separating column containing sieve trays as separating internals, at least some of the sieve trays are operated above an entrainment fraction of 10% by weight.

Thermal separating process between at least one gaseous and at least one liquid stream, of which at least one comprises (meth)acrylic monomers

A hydraulically sealed crossflow mass transfer tray, separating columns which contain the hydraulically sealed crossflow mass transfer tray and the use of such separating columns for thermal separating processes.

Hydraulically sealed crossflow mass transfer tray

A process for the continuous recovery of (meth)acrylic acid from the reaction gas of a catalytic gas-phase oxidation comprising the following process stages is proposed:

Method for the continuous extraction of (meth)acrylic acid

The invention relates to a method for producing a highly pure, aqueous hydroxylamine solution by distilling an aqueous solution, devoid of salt, of a hydroxyl ammonium salt in a plate column comprising at least two mechanical plates. Said method is characterised in that packing bodies are arranged between at least two plates of the plate column over the cross-section of said column.

Method for producing an aqueous hydroxylamine solution devoid of salt

A process for preparing a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of a hydroxylammonium salt and a base in a tray column having at least two mechanical trays, wherein random or structured packings are located above at least one tray of the tray column over the cross section of the column.

Method for the production of a salt-free aqueous hydroxylamine solution

In a process for preparing acrylic acid, an acrylic acid-containing product gas mixture obtained by catalytic gas phase partial oxidation of a Cprecursor of acrylic acid, after direct cooling with a quench liquid, is fractionally condensed in a separating column provided with internals, rising into itself with sidestream takeoff of crude acrylic acid, and the acrylic acid oligomers which form are dissociated and the resulting dissociation gas is subjected to a countercurrent rectification before it is recycled.

Preparation of acrylic acid

A description is given of a process for preparing methyl formate by reacting excess methanol with carbon monoxide under superatmospheric pressure and at elevated temperature in the presence of alkali metal methoxide or alkaline earth metal methoxide as catalyst in a pressure-rated reactor, in which the use of at least two reactor elements, preferably operated in countercurrent, at about 100&#xb0; C. and a pressure of about 100 bar in combination with a solids-free desalting of the reaction product makes possible very economical, largely trouble-free production of methyl formate in any desired quality and with a very good production capacity. Furthermore, the process for solids-free desalting and apparatuses for carrying out this process are described.

Method for the continuous production of methyl formate

In a process for the fractional condensation of an acrylic acid-containing product gas mixture of a gas-phase partial oxidation of C precursors of acrylic acid with molecular oxygen under heterogeneous catalysis, the separation column used contains both dual-flow trays and hydraulically sealed cross-flow trays as baffles having separation activity.

Fractional condensation of a product gas mixture containing acrylic acid

A process for the fractional condensation of a gas mixture which, in addition to acrylic acid or methacrylic acid, also contains at least one further condensable component and additionally a high proportion of one or more noncondensable components, wherein the gas mixture is passed through a column having separatory internals and the condensable components are condensed by cooling.

Method for the fractional condensation of a hot gas mixture containing acrylic acid or methacrylic acid and having a high proportion of non-condensable constituents

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Neustadt, Germany

Joachim Thiel