Abstract: A process for preparing trioxane by converting methanol to formaldehyde by dehydrogenation at a temperature of 300 to 1000° C., in the presence of a catalyst, wherein the catalyst is generated physically separately from the reactor and at a temperature above the dehydrogenation temperature, and trimerizing the formaldehyde prepared in this way to give trioxane. Also described is a process for preparing polyoxymethylene and polyoxymethylene copolymers from the formaldehyde.

Abstract: In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000° C., the catalyst is generated spatially separately from the reactor and at a temperature above the dehydrogenation temperature.

Abstract: The invention relates to a method for producing formaldehyde from methanol by non-oxidative dehydrogenation, in a reactor, in the presence of a catalyst at a temperature between 300 and 1000° C. Said method is characterized in that the generation of the catalyst takes place spatially separate from the reactor and at a temperature greater than the dehydrogenation.

Abstract: In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000° C., a circulating gas stream comprising by-products of the dehydrogenation is passed through the reactor.

Abstract: Process for preparing propene oxide, in which a mixture of propene and oxygen or an oxygen-containing gas is reacted at a temperature in the range from 150 to 500° C., in the presence or absence of a catalyst, in a reactor, wherein all or part of the interior of the reactor is lined with inert materials. The inert material used is at least one of the materials of the following group: one or more noble metals of transition group VIII of the Periodic Table, in particular gold, titanium and tantalum, glass, enamel, quartz, ceramic and Teflon. The selectivity to propene oxide is >60%.

Abstract: A reactive dyestuff mixture contains at least one vinylsulphonylphthalocyanine dyestuff, at least one Ni fluoro-chloropyrimidenyl phthalocyanine dyestuff and/or one Ni chlorotriazinyl-phthalocyanine dyestuff.

Abstract: A phthalocyanine reactive dyestuff mixture having an improved dyeing levelness and combination properties comprises at least one phthalocyanine vinylsulphonyl reactive dyestuff 1, at least one phthalocyanine fluorochloropyrimidinyl reactive dyestuff 2 and/or a phthalocyanine monochlorotriazinyl reactive dyestuff 3.