Basf Aktiengesellschaft

Basf Se Corporation

Otto Watzenberger

Alfred Hagemeyer

Hans-Michael Schneider

Hans-Josef Sterzel

Heiner Schelling

Bernd Leutner

Eckhard Str&ouml;fer

Axel Deimling

Klaus Kühling

Hendrik Schönfelder

Gabriele Unger

Ekkehard Schwab

Klaus Harth

Manfred Julius

Markus Weber

Andreas Keller

Frank Prechtl

Peter Pfab

Oliver Koch

Jochen Steiner

Joachim Pfeffinger

Eckhard Ströfer

Jae Hyung Hwang

David Agar

Volker Klock

Uwe Wegmann

Thomas Lautensack

Ralf Liebscher

Sandro Pagano

Jurgen Schweinzer

Albrecht Wilhelm Friederang

Hans J&ouml;rg Wilfinger

Peter Mauer

Ulrich Gräβle

Frank Hanus

The invention relates to a soft-magnetic powder coated with a silicon based coating, wherein the silicon based coating comprises at least one of the following fluorine containing compositions: The invention further relates to a process of coating the soft-magnetic powder, the use of such soft-magnetic powder and an electronic component including such soft-magnetic powder.

Temperature-stable soft-magnetic powder

Integrated process, in which pure carbonyl iron powder (CIP) is prepared by decomposition of pure iron pentacarbonyl (IPC) in a plant A, carbon monoxide (CO) liberated in the decomposition of the IPC is used in plant A for the preparation of further CIP from iron or is fed to an associated plant B for the preparation of synthesis gas or is fed to an associated plant C for the preparation of hydrocarbons from synthesis gas, and the CIP prepared in plant A is used as catalyst or catalyst component in an associated plant C for the preparation of hydrocarbons from synthesis gas from plant B.

Integrated method for producing carbonyl iron powder and hydrocarbons

Iron pentacarbonyl is prepared by reacting iron with carbon monoxide in suspension and in the presence of a mixture of alkali metal sulfide and sulfur as a catalyst.

Preparation of iron pentacarbonyl

Iron pentacarbonyl is prepared by reacting iron with carbon monoxide in suspension and in the presence of a polysulfide of the general formula RSR' as a catalyst, where R is an organic radical and x is a number from 2 to 8.

A process for working up hydroxylamine-containing solutions as obtained in particular in the electronics industry during the cleaning of electronic components is described. According to the invention, the hydroxylamine is stripped from the wastewater with steam. The products obtained are aqueous hydroxylamine and an aqueous solution of the amines. Both product streams can be purified in further process steps to give a saleable product.

Recycling hydroxylamine-containing stripper solutions

Hydroxylamine solutions stabilized using tri(4-(2,3-dihydroxyphenyl)-4-oxabutyl)amine, tri(4-(2,3-dihydroxyphenyl)-4-keto-3-azabutyl)amine or salts thereof, and methods of stabilizing hydroxylamine solutions using these compounds.

Stabilizing agent for hydroxylamine solutions

The present invention relates to a process for the preparation of high-purity, stabilized hydroxylamine solutions in which an aqueous hydroxylamine starting solution is treated with an anion exchanger which has been pre-loaded with a hydroxylamine stabilizer in order to remove anions.

Method for preparing highly stabilized hydroxylamine solutions

The present invention relates to a process for the preparation of an aqueous hydroxylamine solution which is essentially free of metal ions, wherein the hydroxylamine solution is subjected to at least one treatment with an acidic cation exchanger.

Method for producing aqueous hydroxylamine solutions which are substantially free of metal ions

Recuperative heat exchangers or regenerative heat exchangers are used for the thermal decomposition of N,O in N,O-containing gases. The process for the thermal decomposition of N,O in N,O-containing gases at from 800 to 1200&deg; C. comprises passing the N,O-containing gas through one or more recuperative heat exchangers or regenerative heat exchangers in such a way that when the gas to be reacted is passed through a charge of heat transfer material it is heated to a temperature in the range from 800 to 1200&deg; C. and the N,O present is decomposed thermally, and cooling the reacted gas by heat exchange so as to heat the charge of heat transfer material and the gas to be reacted.

Thermal decomposition of N2O

An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

Preparation of an aqueous solution of free hydroxylamine

A process for separating a fraction containing low and middle boilers from a mixture of low, middle and high boilers, which involves treating the mixture in a column with low-boiler vapor in the bottom, so that the middle-boiling component accumulates in the low-boiler vapor and can be obtained at the temperature level of the low-boiling component.

Process for separating medium boiling substances from a mixture of low, medium and high boiling substances

A layered catalyst support or carrier provides a core member for carrying out non-steady state heterogeneously catalyzed processes where reaction gases and their products come in contact with a conventional catalyst applied to the carrier. The support as a carrier is made up of a large number of individually shaped particulate bodies or monolithic packings to be loaded into a reactor and maintained as a fluidized bed or a fixed bed during the non-steady state reaction and the recovery of the products. The support or carrier may consist of glass, quartz, oxides, nitrides, aluminosilicates, magnesium silicates, metals and carbon or their mixtures. Each shaped particle or monolithic packing of this core support is then completely enclosed by depositing thereon a thin protective layer of a nitride, oxide, carbide or chloride of a metal, a non-metal or a mixture thereof, which exhibits a dense, pore-free microstructure and a nonpolar surface having a very low density of acid centers. This outer layer is applied to the core support by a plasma-assisted gas phase deposition. The catalytically active layer is then applied to this protective layer.

Catalyst beds for non-steady state processes

A process for breaking down hydroxylamine in aqueous solutions, especially wastewaters, by treatment with an oxidizing agent, which comprises using as said oxidizing agent an alkali metal hypohalite or alkaline earth metal hypohalite or peroxomonosulfuric or peroxodisulfuric acid or a salt thereof and carrying out the treatment with said oxidizing agent at a pH<8.

Breaking down hydroxylamine in aqueous solutions

Method for producing highly pure aqueous hydroxylamine solutions

A process for the oxidation and oxidative dehydrogenation of hydrocarbons, in particular ethylbenzene, to form corresponding oxidized or olefinically unsaturated compounds, in particular styrene, over an oxygen-conferring, oxygen-regenerable catalyst involving a working period, a time-displaced regenerating period and at least one intermediate rinsing period comprises effecting a partial regeneration during the working period by time-displaced addition of a substoichiometric amount of oxygen.

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Mannheim, Germany

Otto Watzenberger