Basf Aktiengesellschaft

Basf Se Corporation

Basfaktiengesellschaft

Franz Corr

Gerhard Olbert

Sven Crone

Ulrich Hammon

Peter Reuter

Ludwig Wambach

A method is proposed for providing an oxygen-containing gas stream for the endothermic reaction of an initial stream comprising one or more hydrocarbons, having a predetermined oxygen concentration and a predetermined temperature, wherein a fluid fuel stream

Method for providing an oxygen-containing gas stream for the endothermic reaction of an initial stream comprising one or more hydrocarbons

A reactor for carrying out a reaction between two fluid starting materials over a catalyst bed with premixing of the fluid starting materials before introduction into the catalyst bed within a delay time of less than 150 ms in a mixing-in device, wherein the mixing-in device is made up of the following elements which are arranged essentially transverse to the inflow direction of the first fluid starting material stream:

Reactor for carrying out a reaction between two fluid starting materials over a catalyst bed with premixing of the fluid starting materials in a mixing-in device

A reactor for carrying out a continuous oxydehydrogenation of a feed gas stream of saturated hydrocarbons after premixing with an oxygen-comprising gas stream over a moving catalyst bed which is introduced in the longitudinal direction of their reactor between two concentric cylindrical holding devices so as to leave a central interior space and an intermediate space between the moving catalyst bed and the interior wall of the reactor to give a reaction gas mixture, wherein the reactor has two or more reactor sections which are separated from one another by disk-shaped deflection plates arranged alternately in the central interior space and divided in subregions by annular deflection plates arranged in the intermediate space between the moving catalyst bed and the interior wall of the reactor, in each case with a mixing-in device which is located upstream of the moving catalyst bed in the flow direction of the reaction gas mixture and comprises the following elements:

Reactor for carrying out a continuous oxydehydrogenation and process

A reactor including a bundle of catalyst tubes through which a reaction mixture is passed, and wherein a heat exchange medium is passed through a space surrounding the catalyst tubes and including ring lines at both reactor ends with jacket orifices for feeding in and removing the heat exchange medium by at least one pump. The heat exchange medium is fed to the upper ring line and is sucked in via the lower ring line by the at least one pump having at least one vertical pump shaft mounted and operated at its upper end. The at least one pump includes a diagonal rotor and a restrictor gap in the longitudinal direction of the at least one pump shaft, within the heat exchange medium, on the pressure side of the at least one pump for sealing and mounting the at least one pump shaft and reducing axial shear of the diagonal rotor.

Reactor having a heat exchange medium circulation

A multitube fixed bed reactor and the use of such a reactor for carrying out catalytic gas-phase reactions, in particular for carrying out exothermic and endothermic catalytic gas-phase reactions such as the preparation of phthalic anhydride (PA), acrylic acid, methacrylic acid (MAA), acrolein, maleic anhydride (MA), glyoxal, phosgene, hydrocyanic acid or vinyl formamide (VFA). In a relatively large multitube reactor in which a large amount of heat of reaction is generated owing to the numerous catalyst tubes () and has to be removed, it is proposed that the ratio of tube spacing t to external tube diameter dbe made dependent on the reactor diameter or on the external tube bundle diameter d. At an external diameter of the catalyst tube bundle () of more than 4 meters, a ratio of tube spacing d to external tube diameter dof at least 1.3 is preferred.

Multi-tube fixed-bed reactor, especially for catalytic gas phase reactions

The invention proposes a reactor ( ) having a contact tube bundle ( ) through whose space surrounding the contact tubes a heat-exchange medium circuit is passed, with ring lines ( ) at both ends of the reactor with jacket apertures ( ) for the supply and discharge of a heat-exchange medium by means of a pump via an external heat exchanger, where the heat-exchange medium is fed to the lower ring line ( ) and is discharged to the heat exchanger via the upper ring line ( ), and with baffle plates ( ) which leave a passage cross section alternately in the reactor center and at the reactor edge. The upper ( ) and lower ( ) ring lines are each divided into an inner ( ) and an outer ( ) ring line by a cylindrical partition wall ( ), and the heat-exchange medium is fed to the outer lower ring line ( ), via a region outside the reactor to the inner upper ring line ( ), via the jacket apertures ( ) of the latter to the region surrounding the contact tubes ( ), via the jacket apertures ( ) to the inner lower ring line ( ) and subsequently via a region outside the reactor to the outer upper ring line ( ).

Reactor comprising a contact tube bundle

In a reactor ( ) which has a bundle of catalyst tubes ( ) and in which a heat transfer medium is circulated through the space surrounding the catalyst tubes, with the ring lines ( ) at both ends of the reactor with openings ( ) through the wall for introduction or removal of a heat transfer medium by means of one or more pumps, where the heat transfer medium is introduced into the lower ring line ( ) and is returned via the upper ring line ( ) to the pump(s) and the heat transfer medium or a substream of the heat transfer medium may, if desired, be passed over one or more external heat exchangers, and with deflecting plates ( ) which alternately leave free an open cross section in the middle of the reactor and at the edge of the reactor, the lower ring line ( ) is divided by means of a horizontal dividing wall ( ) into two regions between which material can pass via preferably uniformly distributed openings ( ) having a regulatable open cross section.

Growing community of inventors

Ludwigshafen, Germany

Franz Corr