Basf Aktiengesellschaft

Basf Se Corporation

Ulrich Hammon

Franz Merger

Matthias Weismantel

Rüdiger Funk

Klaus Joachim Mueller-Engel

Volker Schliephake

Thomas Walter

Joerg Heilek

Andreas Tenten

Juergen Schroeder

Dieter Baumann

Klaus Joachim Müller-Engel

Cornelia Katharina Dobner

Holger Herbst

Hans-Peter Neumann

Gerhard Nestler

Martin Dieterle

Christian Walsdorff

Bernd Eck

Heiko Arnold

Klaus Harth

Jochen Petzoldt

Signe Unverricht

Joachim Thiel

Ulrich Cremer

Ulrike Wegerle

Andreas Raichle

Armin Diefenbacher

Peter Zehner

Matthias Schwarzmann

Sylke Haremza

Frank Rosowski

Holger Borchert

Wilhelm Ruppel

Jürgen Schröder

Richard Krabetz

Gerd Duembgen

Andrey Karpov

Jörg Heilek

Wolfgang Hoelderich

Gerhard Olbert

Norbert Herfert

Georg Sieder

Claus Hechler

Wilfried Heide

Josef Macht

Ulrich Rauh

Ulrich Jaeger

Cathrin Alexandra Welker-Nieuwoudt

Volker Diehl

Fritz Thiessen

Steffen Rissel

Armin Schraut

Till Blum

Frank Huetten

Markus Ottenbacher

Michael Blechschmitt

Friedrich-Georg Martin

Herbert Vogel

Thorsten Friese

Karl-Heinz Boehning

Peter Weidlich

Peter Zurowski

Klaus Herzog

Wolfgang Schneider

Peter Schlemmer

Bernd Gerber

Wolfgang Pies

Jerry Darlington

Helmut Jansen

Bernd Heida

Peter Reuter

Hans Martan

Roland Krokoszinski

Albrecht Dams

Nicole Janssen

Daniel Pfeiffer

Björn Kaibel

Gerhard Laqua

Ludwig Wambach

Michael Kotter

Raimund Felder

Tim Blaschke

Franz Corr

Knut Eger

Lukas Schulz

Christian Raith

Kazuhiko Amakawa

Imke Britta Mueller

Walter Doerflinger

Hans-Juergen Bassler

Christian Rein

Stefan Lipp

Kevin Scott Todd

Ernst Lang

Rolf-Dieter Becher

Lothar Riekert

Ulrich Jäger

Renate Wuestefeld

Renate Wüstefeld

The present invention related to a column for the thermal treatment of a mixture of compounds having a tendency to polymerization, as well as a thermal separating process using the column. The column includes a mass transfer tray having a rising tube with an inlet opening below the tray and an outlet opening above the tray. The rising tube further includes a lateral opening above and close to the upper surface of the mass transfer tray. The rising tube forms a fountain spray of atomized liquid from the mixture of compounds above the tray that enter the rising tube through the lateral opening. The fountain is sprayed to a spot of the inner surface of the column where polymerization is likely to occur.

Column for thermal treatment of a mixture of compounds having a tendency to polymerization

Process for inhibiting the undesired free-radical polymerization of acrylic acid present in a liquid phase P, wherein the acrylic acid content of P is at least 10% by weight, the liquid phase P comprises in the range from 25 to 1000 ppmw of glyoxal based on the weight of the acrylic acid present in P and the liquid phase P is admixed with furfural in an amount that results in a furfural content in the range from 25 to 1000 ppmw based on the weight of the acrylic acid present in P. Liquid phase P, wherein the acrylic acid content of P is at least 10% by weight and the liquid phase P comprises in the range from 25 to 1000 ppmw of glyoxal and in the range from 25 to 1000 ppmw of furfural in each case based on the weight of the acrylic acid present in P.

Method for inhibiting unwanted radical polymerisation of acrylic acid present in a liquid phase P

Multimetal oxide composition comprising Mo, Bi, Fe, Cu and one or more than one of the elements Co and Ni and use thereof.

Multimetal oxide compositions comprising Mo, Bi, Fe and Cu

The present invention relates to a column () for thermal treatment of fluid mixtures, having a cylindrical, vertically aligned column body () which forms a column cavity (), having a sequence of vertically spaced-apart dual-flow mass transfer trays () which are mounted in the column cavity () and which have orifices for passage of liquid and gas in countercurrent, and having at least one gas entry orifice () disposed below the lowermost of the sequence of dual-flow mass transfer trays (). It is a characteristic feature of the column of the invention that a gas distribution tray () which is disposed between the lowermost of the sequence of dual-flow mass transfer trays () and the gas entry orifice () has orifices () for vertical passage of gas which can be introduced into the column cavity () via the gas entry orifice (), the orifices () being formed so as to bring about equal gas distribution over the column cross section. The invention further relates to a process for thermal treatment of fluid mixtures in such a column ().

Column for thermal treatment of fluid mixtures

The present invention relates to a chimney tray () for a column () for thermal treatment of fluid mixtures, comprising a collecting tray () and at least two chimneys (--) spaced apart horizontally in the collecting tray (), where each chimney (--) forms a vertically aligned chimney body (--) which forms a passage orifice (--) through the collecting tray (), and has a cover unit (--) arranged spaced apart from the chimney body (--), and where the cover unit (--) covers the respective passage orifices (--) in the vertical direction. The chimney tray () of the invention is characterized by a screen () which extends around the chimney body (-) of a first chimney (-), with the lower annular edge () of the screen () below the upper edge () of the chimney body (-) of the first chimney (-) and the upper annular edge () of the screen () above the lower outer edge () of the cover unit (-) of the first chimney (-) or adjoining the lower outer edge () of the cover unit (-) of the first chimney (-).

Chimney tray for a column for thermal treatment of fluid mixtures

The present invention relates to a column () for thermal treatment of fluid mixtures, having a cylindrical, vertical column body () which forms a column cavity (), a plurality of trays () mounted with vertical spacing in the column cavity (), and a support construction () which supports at least one of the trays () in vertical direction. It is a characteristic feature of the inventive column () that the support construction () has a plurality of orifices () which allow horizontal mass transfer through the support construction (). The invention further relates to a tray device for such a column and to a thermal separation process between at least one gas ascending within such a column () and at least one liquid descending within the column ().

A plant () for recovering acrylic acid, which includes: a absorption column (); a dissociation column (); a first line () connected to the dissociation column (); a second line () connecting the absorption column () and the dissociation column (); a third line () feeding a substream of the mother acid obtained in the crystallization into the dissociation column (); a fourth line () connecting the crystallization apparatus and the absorption column (); and a fifth line () connecting the dissociation column () and the absorption column ().

Process and plant for recovering acrylic acid

A reactor system () having a reactor, at least one cooler () connected to the reactor (), at least one pump () for circulating at least some of a liquid heat-transfer medium (), wherein the pump () is connected to the reactor () and/or the at least one cooler (), and a container () for collecting the liquid heat-transfer medium () is provided. The container () is connected to the reactor () and/or the at least one cooler () and is disposed substantially below the reactor () and/or the at least one cooler (). Also provided are exothermic reactions which are conducted in the reactor system.

Reactor system and use thereof

The invention relates to a crossflow tray for a mass transfer column () in which a gas is conducted in countercurrent to a liquid, the crossflow tray () having passage orifices () for the gas and at least two downcomers (), the downcomers () projecting beyond the top surface of the crossflow tray () and a collecting cup () being disposed beneath each downcomer (). The downcomer () projects into the collecting cup (), the minimum horizontal cross-sectional area of the collecting cup () is 1.2 to 4 times greater than the horizontal cross-sectional area of the downcomer () at the outlet, and the collecting cup () has a circumferential wall () having an overflow (). The invention further relates to a mass transfer column comprising the crossflow trays and to a use of the mass transfer column.

Crossflow tray for a mass transfer column, mass transfer column and use of the mass transfer column

The present invention relates to an apparatus () for separation of a target product from a liquid phase P comprising the target product, comprising The present invention further relates to a process for removing a target product from a liquid phase P comprising the target product.

Apparatus and process for separating a target product from a liquid phase comprising the target product

A system () and method for operating a liquid gas evaporator (), comprising an evaporator (), a trough () carrying the evaporator (), a housing () which surrounds the evaporator () on three sides, at least one detector () for sensing liquid gas arranged in the trough (), a line () for the distribution of vapor D on the fourth, non-housed side of the evaporator () arranged at the margin of the trough () which is not closed off by the housing (), a feed (), connected to the line (), and a regulating valve () provided on the feed () and connected to the detector () and at least one shut-off valve ().

System and method for operating a liquid gas evaporator

The present invention relates to a process for treating secondary components obtained in acrolein and/or (meth)acrylic acid production, comprising the steps of: The present invention further relates to a plant () for treating the secondary components obtained in acrolein and/or (meth)acrylic acid production.

Process and plant for treatment of secondary components obtained in acrolein and/or (meth)acrylic acid production

The present disclosure includes a column () having a cylindrical, vertical column body () forming a column cavity (), and a mass transfer tray () disposed in the column cavity () and forming a collecting area (). The column () is characterized by a circulation device () having at least one drain orifice () formed in the column body () above the collecting area (), a circulation line () in fluid connection with the drain orifice () and at least one recycling orifice (-to-) which is in fluid connection with the circulation line () and is formed in the column body () above the collecting area (). Also disclosed herein is a thermal separating process in which a gas ascends within a column () of the present disclosure, and a liquid descends within the column (), said gas and/or liquid containing (meth)acrylic monomers.

Column for thermal treatment of a fluid

The invention relates to an oxidation catalyst comprising at least one inorganic, oxidic or ceramic, shaped support body having a BET surface area of less than 0.5 m/g, based on the support, which is at least partly coated with a catalytically active multielement oxide, the catalyst being precious metal-free and the shaped support body having the form of a saddle whose saddle surface is curved oppositely in the two principal directions, to a process for producing it, to its use in various catalytic gas phase oxidations, and to corresponding processes for catalytic gas phase oxidation.

Oxidation catalyst with saddle-shaped support body

A heat exchanger () contains: a bundle of at least two heat exchanger tubes (), a heat exchanger housing () surrounding the bundle of heat exchanger tubes (), wherein a liquid heat-transfer medium () is passed around the bundle of heat exchanger tubes () in the heat exchanger housing (), a heat exchanger cap () sealing the top of the heat exchanger housing (), a heat exchanger bottom () sealing the bottom of the heat exchanger housing (), a feed point () for the heat-transfer medium (), an outlet () for the heat-transfer medium (), an emergency relief port () disposed in proximity to the heat exchanger cap (). The heat exchanger () contains a safety device () disposed in proximity to the heat exchanger bottom ().

Heat exchanger, reactor arrangement comprising this heat exchanger and method for controlling the temperature of a reactor

Growing community of inventors

Mannheim, Germany

Ulrich Hammon