Basf Se Corporation

Basf Aktiengesellschaft

Wacker Chemie Ag

Other

Robert Baumann

Hermann Luyken

Tim Jungkamp

Michael Bartsch

Gerd Haderlein

Jens Scheidel

Wolfgang Siegel

Axel Franzke

Dagmar Pascale Kunsmann-Keitel

Andreas Leitner

Johann-Peter Melder

Michael Bock

Boris Buschhaus

Gordon Brasche

Alfred Oftring

Stephanie Jaegli

Randolf Hugo

Peter Pfab

Sebastian Ahrens

Peter Bassler

Eckhard Stroefer

Markus Christian Biel

Jörg Pastre

Tobias Aechtner

Jens Baldamus

Marco Altmayer

Miquel Angel Flores

Ferenc Molnar

Andreas Deckers

Rolf-Hartmuth Fischer

Torsten Mattke

Thomas Krug

Paul Klingelhoefer

Frank Rittig

Rocco Paciello

Armin Stamm

Götz-Peter Schindler

Thomas Heidenfelder

Marta Reinoso Garcia

Andreas Brodhagen

Gerhard Theis

Markus Hartmann

Joachim Pfeffinger

Hanns Wochner

Jakob Fischer

Wolfgang Ahlers

Veronika Wloka

Christian Miller

Radwan Abdallah

Jon S Speier

Michael Lorenz

Markus Jegelka

Petra Deckert

Barbara Becker

Wolfgang Staffel

Constanze Franzke

Julia Leschinski

Matthias Kloetzer

Peter Baβler

Dag Wiebelhaus

Geert Janssens

Marie Katrin Schroeter

Andreas Glass

Hans-Martin Polka

Dieter Vogt

Roderich Roettger

Matthias Klötzer

Thomas Greindl

Alison Hewat

Heinz Schafer

Miguel Angel Flores

Friedhelm Teich

Robert Hoelzl

Michael Weichselgartner

Process for preparation of a mixture of methyl glycine diacetic acid (MGDA) or its respective mono-, di-, trialkali metal salt or its respective mono-, di- or tri-ammonium salt or mixtures thereof, and glutamic acid diacetic acid (GLDA) or its respective mono-, di-, tri-, or tetra-alkali metal or mono-, di-, tri- or tetra-ammonium salt or mixtures thereof, wherein said process com-prises the steps of: (a) dissolution in water of (a1) alanine in its L- or D-enantiomeric form or its respective monoalkali metal salt or mixtures thereof, and (a2) glutamic acid as L- or D-enantiomer or its respective mono-, or dialkali metal or mixtures thereof, wherein the molar ratio of alanine to glutamic acid is in the range of from 1:9 to 9:1, (b) converting the mixture obtained in step (a) with formaldehyde and hydrocyanic acid or alkali metal cyanide to the corresponding dinitriles, (c) saponification of the dinitriles resulting from step (b).

Process for making mixtures of enantiomers of MGDA and GLDA

The invention provides a process for determining surface contamination of polycrystalline silicon, including the steps of: a) providing two polycrystalline silicon rods by deposition in a Siemens reactor; b) determining contaminants in the first of the two rods immediately after the deposition; c) conducting the second rod through one or more systems in which polycrystalline silicon rods are processed further to give rod pieces or polysilicon fragments, optionally cleaned, stored or packed; d) then determining contaminants in the second rod; wherein the difference in the contaminants determined in the first and second rods gives surface contamination of polycrystalline silicon resulting from systems and the system environment.

Process for determining surface contamination of polycrystalline silicon

The invention relates to polyphenyl polymethylene polyisocyanates having an NCO number of at least 29% comprising less than 2% by weight ureas, less than 8% by weight carbodiimides or uretonimines and less than 1000 ppm organic chlorine compounds. The polyphenyl polymethylene polyisocyanates can be prepared according to the invention by reacting The polyphenyl polymethylene polyisocyanates can further be prepared according to the invention, prior to the thermal cleavage, by removing compounds having free amino groups or urea groups present in the carbamate crude mixture from the carbamate crude mixture by filtration of the carbamate crude mixture comprising the polyphenyl polymethylene polycarbamates over a solid acidic adsorbent in the presence of an acid dissolved in the carbamate crude mixture.

Low by-product content polyphenylene polymethylene polyisocyanates

Process for manufacturing a crystalline alkali metal salt of the general formula (I) [R&#x2014;CH(COO)&#x2014;N(CH&#x2014;COO)]M(I) wherein Mis selected from alkali metal cations, same or different, Ris selected from C-C-alkyl and CHCHCOOM, comprising the step of (b) crystallizing said alkali metal salt from an aqueous solution containing in the range of from 5 to 30% by weight of alkali metal hydroxide, referring to said aqueous solution.

Process for making a crystalline alkali metal salt of a complexing agent, and crystalline complexing agent

The present invention relates to a process for preparing ethylenediamine (EDA), where the process comprises the steps a) to c). In step a), formaldehyde is reacted with hydrocyanic acid (HCN) to form formaldehyde cyanohydrin (FACH), where the hydrocyanic acid is completely free or largely free of sulfur dioxide (SO). The FACH prepared in this way is reacted with ammonia (NH) to form aminoacetonitrile (AAN) in step b), whereupon a hydrogenation of AAN in the presence of a catalyst to form EDA is carried out in step c).

[object Object]

A process for the continuous preparation of adiponitrile by hydrocyanation of 3-pentenenitrile is described, wherein

Method for continuous production of adiponitrile

The present invention relates to a process for purifying ethylenediamine (EDA) by distillation, wherein the process comprises the steps a) and b). In step a), a mixture (G1) comprising water, EDA and N-methylethylenediamine (N-MeEDA) is fed into a distillation apparatus (D1), and the major part of the water comprised in the mixture (G1) is separated off overhead at a pressure of greater than 4.8 bara. From the bottom of (D1), the water-enriched mixture (G2) is fed into a distillation apparatus (D2) in step b). At the top of (D2), the major part of the N-MeEDA is distilled off. The stream (S3) obtained from the bottom of (D2) comprises EDA, with the components water and N-MeEDA comprised in the mixture (G1) having been largely or completely removed. Further distillation steps can optionally be carried out in order to obtain pure EDA, for example when diethylenetriamine (DETA) is additionally comprised in the mixture (G1). If ammonia is additionally comprised in the mixture (G1), an ammonia removal is preferably additionally carried out before carrying out the step a) in the process of the invention.

Method for the distillative purification of EDA

A process is described for preparing 3-pentenenitrile, characterized by the following process steps:

Method for producing linear pentenenitrile

The invention provides polycrystalline silicon having concentrations of dopants of 1-10 ppta of boron, 1-20 ppta of phosphorus, 1-10 ppta of arsenic, 0.01-1 ppta of aluminum, and having a charge carrier lifetime of at least 2000 and at most 4500 &#x3bc;s.

Polycrystalline silicon

A process for preparing EDDN and/or EDMN by conversion of FA, HCN and EDA, the reaction being effected in the presence of water, and, after the conversion, water being depleted from the reaction mixture in a distillation column, which comprises performing the distillation in the presence of an organic solvent which has a boiling point between water and EDDN and/or EDMN at the distillation pressure existing in the column or which forms a low-boiling azeotrope with water.

Process for preparing EDDN and EDMN

The present invention relates to a process for preparing ether carboxylates.

Preparing ether carboxylates

A process for reacting formaldehyde cyanohydrin (FACH) with ethylenediamine (EDA) in a reactor with limited backmixing at a temperature in the range from 20 to 120&#xb0; C., wherein the residence time in the reactor is 300 seconds or less.

Process for preparing EDDN and/or EDMN by conversion of FACH and EDA

A process for coproducing di- and/or polyisocyanates and glycols, comprising process stages A, B, C and E for preparing glycols and process stages A, C, D, E, F and G for preparing di- and/or polyisocyanates, which comprises 

Process for coproducing di- and/or polyisocyanates and glycols

A process is disclosed for separating the output from the reaction of EDDN or EDMN with hydrogen in the presence of THF, a catalyst, TETA or DETA, water, and optionally organic compounds having higher and lower boiling points than TETA or DETA. Hydrogen is removed, and the output is supplied to a distillation column DK1 in which an azeotrope, optionally comprising organic compounds with a boiling point lower than TETA or DETA, is removed from the top. A product comprising TETA or DETA is removed from the bottom and passed into a distillation column DK2, removing THF. A stream comprising TETA or DETA passes from the bottom of DK2. The DK1 azeotrope is condensed. Phase separation is induced by the addition of an organic solvent essentially immiscible with water, and the mixture is separated. The organic phase is recycled into DK1 and the water phase is discharged.

Process for working up reaction outputs from the hydrogenation of EDDN or EDMN

A process for reacting ethylenediamine-formaldehyde adduct (EDFA) and/or ethylene-diamine-monoformaldehyde adduct (EDMFA) with hydrogen cyanide (HCN) in a reactor with limited backmixing at a temperature in the range from 20 to 120&#xb0; C., wherein the residence time in the reactor is 300 seconds or less.

Process for preparing EDDN and/or EDMN by reacting EDFA and/or EDMFA with HCN

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Mannheim, Germany

Robert Baumann