Bayer Aktiengesellschaft

Laszlo Imre

Walter Horstmann

Reinhard Schomacker

Heinrich Nassenstein

Karl-Friedrich Wedemeyer

Judit Daun

Hans-Gerhard Leopold

Carbonyl compounds can be prepared by catalytic oxidation of olefins with oxygen or oxygen-containing gases in a microemulsion (ME) as reaction medium and catalyst support. The catalysts present in ME and used for this purpose are characterized by a content of 0.0001-10% by weight of a Pd compound and by a content of 0.0005-20% by weight of a subgroup metal compound or a quinone, based on the total weight of the catalysts present in the ME.

Process for preparing carbonyl compounds by catalysed oxidation of

A process for the preparation of 1,4-diazobicyclo-(2,2,2)-octane by contacting piperazine with a catalyst at an elevated temperature, the catalyst containing silicon dioxide.

Process for the preparation of 1,4-diazabicyclo-(2,2,2)-octane

In the gas phase reaction of methane and oxygen at elevated temperature to form formaldehyde, the improvement which comprises effecting the reaction in the presence of silicon dioxide as catalyst, the silicon dioxide having a large internal surface area. Other metal oxides may be mixed with the silicon dioxide.

Oxidizing methane to formaldehyde

In a process wherein a hydrocarbon containing a C-C-double bond is oxidatively split with both C atoms of the double bond being converted to carbonyl functions, the improvement which comprises contacting the hydrocarbon with an oxygen-containing gas at an elevated temperature in the presence of at least one oxide of an element of the V, VI or VII auxiliary group of the periodic system (Mendelejev) as catalyst. Preferred catalysts are vanadium, niobium, tantalum, chromium, molybdenum tungsten, uranium, manganese, technetium, or rhenium oxide in stages of oxidation ranging from the maximum to the free metal, preferably on a carrier. Preferred hydrocarbons are ethylene and cyclopentene. Carbonyl functions, e.g. aldehyde or acid, are formed at each carbon making up the double bond.

Growing community of inventors

Leverkusen, Germany

Laszlo Imre