Basf Se Corporation

Basf Aktiengesellschaft

Joerg Heilek

Klaus Joachim Mueller-Engel

Ulrich Hammon

Dieter Baumann

Volker Schliephake

Bernd Eck

Martin Dieterle

Till Blum

Thomas Walter

Wolfgang Schneider

Sylke Haremza

Klaus Joachim Müller-Engel

Matthias Maase

Armin Diefenbacher

Christoph Adami

Jordan Keith Lampert

Kirill Bramnik

Ulrich Jaeger

Hermann Ascherl

Thorsten Friese

Steffen Rissel

Peter Zurowski

Benedikt Kalo

Imke Britta Mueller

Gerhard Bertlein

Wolfgang Gunkel

Dirk Litters

Rainer Askani

Karl Heinz Schall

Stefan Pichlmair

A process for making a mixed metal oxide, may involve: (a) providing a hydroxide or oxyhydroxide of TM with an average particle diameter (D50) in the range of from 0.1 &#x3bc;m to 5 mm; (b) subjecting the hydroxide or oxyhydroxide of TM to a stream of gas with a temperature in the range of from 150 to 2000&#xb0; C., wherein TM contains nickel and at least one further transition metal selected from cobalt and manganese.

Process for making a mixed metal oxide

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A process for transporting a liquid monomer phase which has been withdrawn from a storage vessel and comprises methacrylic monomers to an extent of &#x2267;90% by weight, in a tank truck or in a tanker ship, in which the liquid monomer phase is subjected to a separating operation on the route from the storage vessel into the tank of a tank truck or of a tanker ship in order to separate polymer of the monomer present in dissolved form in the liquid monomer phase.

Process for transporting in the tank of a tank truck or tanker ship a liquid monomer phase withdrawn from a storage vessel

A process for starting up a separating process for purifying removal of acrylic acid crystals from a suspension S of crystals thereof in mother liquor with a hydraulic wash column which has a crystal melt circuit including crystal melt space, and a process space and a distributor space which are separated by an end with passages connecting the two spaces, in which the crystal bed is formed for the first time by first filling the crystal melt circuit and, at least partly, the process space with an acrylic acid-comprising startup liquid whose acrylic acid crystal formation temperature is less than or equal to the temperature of the suspension S increased by 15&#xb0; C., and then continuing the filling of the wash column with the suspension S and optionally with control liquor until the difference between the pressure in the crystal melt space and the pressure in the distributor space falls suddenly, the arithmetic mean of the total waste liquor flow flowing through the filters of the filter tubes of the wash column until this time, based on the area of all filters, being not more than 80 m/(m&#xb7;h).

Process for starting up a separating process for purifying removal of acrylic acid crystals from a suspension S of crystals thereof in mother liquor

A process for separating acrylic acid present as a main product and glyoxal present as a by-product in a product gas mixture of a partial gas phase oxidation of a Cprecursor compound, in which a liquid phase P is obtained, which consists of acrylic acid to an extent of at least 70% of its weight and, based on the molar amount of acrylic acid present therein, comprises at least 200 molar ppm of glyoxal, in which the glyoxal is separated from the acrylic acid in the liquid phase P by crystallization.

Process for separating acrylic acid present as a main constituent and glyoxal present as a by-product in a product gas mixture of a partial heterogeneously catalyzed gas phase oxidation of a C3 precursor compound of acrylic acid

A process for heterogeneously catalyzed partial gas phase oxidation of propylene to acrylic acid, in which the starting reaction gas mixture comprises cyclopropane as an impurity and the acrylic acid, after conversion from the product gas mixture into the condensed phase, is removed with the aid of a crystallative removal.

Process for heterogeneously catalyzed partial gas phase oxidation of propylene to acrylic acid

A process for purifying removal of a chemical target compound from a suspension of crystals thereof in mother liquor in a wash column with forced transport of the crystal bed from the top downward, in which crystals are removed from the lower end of the crystal bed with a rotating removal device and melted, and a portion of the crystal melt is conducted back toward the crystal bed as wash melt, the removal device being secured with a drive shaft conducted into the wash column from the bottom through an inlet having a seal, said drive shaft being driven about its longitudinal axis by a drive unit for rotation and being mounted so as to be rotatable about its longitudinal axis in more than one bearing, such that the mounting in one of the bearings absorbs the downward force acting on the drive shaft, the mounting in two or more bearings absorbs forces acting radially outward from the drive shaft, and the mounting in one bearing is additionally capable of absorbing an upward force acting on the drive shaft.

Process for purifying removal of a chemical target compound from a suspension of crystals thereof in mother liquor

A process for operating a continuous removal of a target product X in the form of fine crystals of a liquid phase P comprising the target product X and constituents other than the target product X by cooling suspension crystallization in the secondary chamber of an indirect heat exchanger to which liquid phase P flows continuously with simultaneous continuous flow through the primary chamber of the indirect heat exchanger with a coolant, and continuous withdrawal of a crystal suspension S having a degree of crystallization Y from the secondary chamber in two operating states I and II, wherein the coolant temperature is lower, the mass flow of liquid phase P is greater and the molar proportion of the constituents other than the target product X in the liquid phase P in operating state II is greater than in operating state I.

Process for operating a continuous removal of a target product X in the form of fine crystals of the target product X

A process for purifying removal of acrylic acid, methacrylic acid, N-vinylpyrrolidone or p-xylene crystals from their suspension in mother liquor by means of a wash column with forced transport, whose shell of the process chamber is a metal wall, the wash column additionally being enveloped by a thermal insulation material having a water vapor barrier and a specific heat flow of &#x3e;0.1 W/mand &#x3c;10 W/mflowing into the process chamber through the metal wall of the wash column.

Process for purifying removal of acrylic acid, methacrylic acid N-vinylpyrrolidone or P-xylene crystals from their suspension in mother liquor

A process for storing a monomer phase which is liquid under the conditions of storage and comprises methacrylic monomers to an extent of &#x2267;95% by weight and has been obtained by condensation out of a gaseous phase or by melting a crystalline phase, in a storage vessel, in which polymer of the monomer present in dissolved form in the liquid monomer phase is removed therefrom on the route from its generation into the storage vessel, and also a process for withdrawing liquid monomer phase from the storage vessel in which polymer of the monomer present in dissolved form in the monomer phase is likewise removed.

Process for storing a monomer phase which is liquid under the conditions of storage

A method for the heterogeneously catalyzed partial direct oxidation of propane to acrylic acid in the gas phase, in which the reaction gas inlet mixture comprises cyclopropane as an impurity and the acrylic acid, after it has been converted from the product gas mixture into the liquid phase, is operated from the other constituents of the liquid phase with the aid of a separation by crystallization.

Method for the heterogeneously catalyzed partial direct oxidation of n-propane to acrylic acid

The present invention relates to a process for the preparation of solid acylphosphine oxides by converting an acylphosphine oxide which is in the form of a melt or in dispersed form into the solid state of aggregation with mechanical stress, shearing/internal agitation of the melt.

Method for producing acylphosphine oxide solids

An apparatus for separating crystals from their suspension in contaminated crystal melt with purification, in which a hydraulic wash column has distributor aids in a distributor space.

Device for performing the purifying separation of crystals out of their suspension in a contaminated crystal melt

A process for continuously removing a target product X in the form of fine crystals from a liquid phase P comprising the target product X and constituents other than the target product X by cooling suspension crystallization in an indirect heat transferer, in which the crystal suspension formed is conducted out of the heat transferer first into a mixed buffer tank and, from there, fed to an apparatus for separating the crystal suspension into crystals and liquid phase, and wherein external measures dissipade the oversaturation of the crystal suspension fed to the buffer vessel with target product X.

Process for operating a continuous removal of a target product X in the form of fine crystals

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.

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Bammental, Germany

Joerg Heilek