Bayer Aktiengesellschaft

Burkhard Lachmann

Hans Rudolph

Wolfgang Cohnen

Udo Birkenstock

Herbert Schmidt

Hans-Josef Buysch

Rudolf Merten

Hugo Vernaleken

Dieter Margotte

Alfred Pischtschan

Hans J Rosenkranz

Reinhard Langer

Ludwig Rottmaier

Harald Oertel

Aziz El-Sayed

Harald Medem

Manfred L Gallus

Franz-Ulrich Von Gehlen

Wolfgang Siebourg

Josef Metten

Process for producing aromatic amines by gaseous phase hydrogenation

Supported catalysts containing palladium on a support material are improved by added bases which remain on the material. These supported catalysts are useful for hydrogenating optionally substituted phenols to give the corresponding cyclohexanols as the predominant product.

Supported hydrogenation catalysts

Self-extinguishing thermoplastic polyamide moulding compositions containing barbituric acid and/or reaction products thereof as flameproofing agent.

Flameproof polyamide moulding compositions

A process for the hydrogenation of nitrobenzene to aniline is described wherein the nitrobenzene is contacted with hydrogen in the presence of a multi-component supported catalyst containing 1 to 20 grams of noble metal per liter of support and 1 to 20 grams per liter of support of one or more transition metal of the Groups IVa, Va, or VIa of the Periodic Table. The catalyst can contain 1 to 20 grams per liter of support of a further transition group element or of a member of the main group. The catalyst is one which has been prepared by a process involving pretreatment of the support with a base prior to impregnation with the catalytically active substances, followed by drying to a residual moisture content of less than 10 percent of the maximum absorbency of the support.

Process for the catalytic hydrogenation of nitrobenzene

Object of the invention are UV absorbents for numerous polymers which are distinguished by their comparative lack of self-color, high light absorption and good compatibility with the polymers as well as with other additives.

UV Light stabilized polycarbonate composition

Piperidine derivatives of formula ##STR1## can be prepared by reacting 4-amino-piperidine with for example enolic ethers. The compounds obtained may be used as stabilizers.

Piperidine derivatives as light stabilizers

Homopolymers and copolymers based on alkenoyloxybenzylidene-malonic esters of the formula ##SPC1## Where

Polymers and copolymers based on alkenoyl-oxybenzylidene-malonic esters

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Meerbusch, Germany

Burkhard Lachmann