Dow Global Technolgoies LLC

Kristina Platkowski

Paul Aaron Gillis

Helge Braun

Jan Willem Verwijs

Joerg Schmidt

Harald Velten

Janet M Goss

Douglas D Merrick

Acicular mullite bodies are made in two-step firing process in which a green body is converted first to a fluorotopaz and then to acicular mullite. The bodies are contained within an enclosed region of the furnace. A flow of process gas is provided through the enclosed region during the fluorotopaz-forming step. The process gas is introduced into the enclosed region through multiple openings on at least one side of the enclosed region, and withdrawn through multiple openings on another side of the enclosed region. During the acicular mullite-forming step, a flow of purge gas is maintained in the exterior portion of the furnace. This purge gas may be removed by flowing it into the enclosed region of the furnace and out of the furnace from the enclosed region without re-entering the exterior portion for the furnace.

Method for making porous acicular mullite bodies

A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing elements. These droplets coalesce and at least partially phase separate as the mixture passes through the subsequent coalescing zone. The tubular reactor is particularly suitable for nitrating organic compounds while forming low levels of improperly nitrated by-products and low levels of nitrophenolics.

Tubular reactor having static mixing elements separated by coalescing zones

Process for conducting liquid/liquid multiphase reactions in a tubular reactor having static mixing elements separated by coalescing zones

Process for ring nitrating aromatic compounds in a tubular reactor having static mixing elements separated by coalescing zones

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Boehlitz-Ehrenberg, Germany

Kristina Platkowski