Evonik Degussa Gmbh

Uhde Gmbh

Evonik Oxeno Gmbh & Co. Kg

Evonik Operations Gmbh

Carsten Gehlen

Michael Grass

Meinhard Schwefer

Florian Boeck

Benjamin Woldt

Joachim Motz

Imke Schulz

Florian Sebastian Boeck

The invention provides multilayer surface coverings each having a layer obtained from a filler-containing PVC plastisol and obtained from a filler-free PVC plastisol, each of which comprises a plasticizer composition comprising bis(2-ethylhexyl) cyclohexane-1,4-dicarboxylate. Such surface coverings may be used as floor coverings or as imitation leather.

Use of bis(2-ethylhexyl) cyclohexane-1,4-dicarboxylate as plasticizer in surface coverings

Ester mixtures comprising the esters A(COOR)(COOR), A(COOR)(COOR), A(COOR)(COOR)and A(COOR)(COOR), can be produced in a targeted way by processes in which acids A(COOH)or derivatives thereof are reacted with an amount (m+s) of ROH and an amount mof ROH, the reaction mixture being heated at boiling, the alcohol ROH having a lower boiling point than the alcohol ROH, A being an aromatic, alicyclic or aliphatic radical, x being 1 or 2, and Rand Rindependently of one another being substituted or unsubstituted aryl radicals or linear or branched, substituted or unsubstituted alkyl radicals having 3 to 20 carbon atoms, mand mcorresponding to the mole equivalents of the alcohol radicals ORand ORto be introduced into A(COOH)or derivatives thereof, and sbeing greater than 0.

Production of ester mixtures

A method of reducing the NO content in gases is described. A selected zeolite catalyst is used in the method. This catalyst is present in the H form and/or contains exchanged iron and is characterized by the presence of nonlattice aluminum in addition to the lattice aluminum in a molar ratio of from 1:2 to 20:1. The method can be used in nitric acid production for reducing the NO content of process gases or offgases.

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Marl, Germany

Carsten Gehlen