Basf Se Corporation

Basf Aktiengesellschaft

Thomas Walter

Ulrich Hammon

Frank Huetten

Markus Ottenbacher

Klaus Joachim Mueller-Engel

Joerg Heilek

Wolfgang Schneider

Volker Schliephake

Armin Diefenbacher

Jörg Heilek

Armin Schraut

Christian Raith

Michael Blechschmitt

Bernd Gerber

Rainer Askani

Bruno Seider

Frank HÜTTEN

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 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

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

A process for recovering acrylic acid, including: a) division of a heated mother acid stream in direction of an absorption a condensation column and a dissociation column; b) feeding of a heated mother acid substream as runback to the dissociation column; c) feeding-in of at least one stripping gas stream to the dissociation column; d) feeding-in of a secondary component stream comprising oligomeric acrylic acid from the absorption column to the dissociation column; e) dissociation of part of oligomeric acrylic acid in the dissociation column to give monomeric acrylic acid; f) removal of secondary components comprised in the secondary component stream in the dissociation column; g) discharge of monomeric acrylic acid as gas mixture with introduced circulating stripping gas stream from the dissociation column; and h) feeding-in of the gas mixture to the absorption column.

The present invention relates to a plant for performance of heterogeneously catalyzed gas phase reactions. The plant entails a reactor, at least one line leading into the reactor for introduction of reactants into the reactor, at least one first feed for providing at least one first reactant A, which leads into the line, at least one second feed for providing at least one second reactant B, which leads into the line, at least one third feed for providing a cycle gas G, which leads into the line, a temperature control unit which is disposed in the line upstream of the reactor and is for controlling the temperature of the first reactant A and/or second reactant B and/or cycle gas G prior to entry into the reactor and at least one outlet for products, by-products and/or unreacted reactants from the gas phase reaction.

Plant and process for performance of heterogeneously catalyzed gas phase reactions

The present invention describes a system () for recovering liquid or free-flowing chemicals in a chemical plant (), comprising

System and method for recovery of liquid or free-flowing chemicals

A thermal separation process between a gas ascending in a separating column and a liquid descending in the separating column, which comprise (meth)acrylic monomers, wherein the separating column comprises a sequence of crossflow mass transfer trays, the crossflow mass transfer trays of which have passage orifices for the ascending gas in crossflow direction both in front of and beyond a downcomer for the descending liquid, and such crossflow mass transfer trays and one such crossflow mass transfer tray in a sequence of crossflow mass transfer trays present in a separating column.

Thermal separation process

A process for operating a hydraulic wash column, in which the position of the buildup front in the wash column is positioned by means of the flow rates of control liquor conducted into the wash column and/or by means of the flow rate of the suspension conducted into the wash column, and the flow rate determination is with the aid of the pressure difference which exists in the column between points in the suspension zone disposed upstream of the buildup front and points in the zone projecting from the buildup front up to the end of the crystal bed.

Growing community of inventors

Hassloch, Germany

Thomas Walter