Siemens Axiva Gmbh & Co. Kg

Cabot Corporation

Axiva Gmbh

Lonza Ag

Rainald Forbert

Dominique Roberge

Bertin Zimmermann

Johannes Hartel

Lothar Gail

Wilfried Schierholz

Thomas Diehl

Ekkehard Eigenherr

A process for recovering and purifying substituted benzenesulfonates, by neutralizing a mixture including at least one substituted benzenesulfonate, or at least one corresponding substituted benzenesulfonic acid, and sulfur trioxide, sulfuric acid and/or hydrogen chloride in free or bound form, in an aqueous phase using an alkali metal hydroxide, and purifying it in this aqueous phase, and by subsequently separating the substituted benzenesulfonate(s) from this aqueous phase. The mixture is comminuted into particles having a Sauter mean diameter in the range from 1 &mgr;m to 2 cm, either before or during introduction into this aqueous phase.

Recovery and purification of substituted benzenesulfonates

The invention relates to a method and a device for separating at least two physical areas ( ) and for reducing the transmission of air-borne particles between said physical areas so as to protect persons and/or products ( ) from said air-borne particles. The persons is located at least partly in the first physical area ( ) and the products ( ) in the second physical area ( ) and at least one flat jet ( ) of purified air is used to separate the two areas. The invention is characterized in that at least one low-turbulence displacement air stream ( ) of purified air is generated at least in the second physical area ( ) near the at least one air jet ( ) and said at least one displacement air stream is directed primarily in the same direction as the at least one air jet ( ).

Method and device for protecting persons and/or products from air-borne particles

The invention relates to an apparatus for preparing a rapidly solidifying mixture from a plurality of liquid components and subsequent atomization of the solidifying mixture. The apparatus comprises a mixing chamber ( ), a liquid distributor ( ) and N identical, droplet-forming nozzles ( ) connected to the liquid distributor. The liquids to be mixed can be fed separately to the mixing chamber and the mixing chamber has neither significant back-mixing in the areas in which reactions can occur, nor significant dead spaces in the flow in these areas. The liquid distributor ( ) is connected to the mixing chamber and divides the mixed stream coming from the mixing chamber equally over the nozzles ( ) without significant back-mixing or dead spaces in the flow, so that the flow properties of the partial streams and their residence time in the liquid distributor are identical.

Device for the mixing and subsequent atomizing of liquids

The present invention refers to a method for the sub-critical drying of lyogels to produce aerogels. The method for the sub-critical drying of lyogels to produce aerogels provides for the lyogel particles to be disposed as a fixed bed and for a drying gas to be passed through them.

Method for the sub-critical drying of lyogels to produce aerogels

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Flörsheim, Germany

Rainald Forbert