Covestro Intellectual Property Gmbh & Co. Kg

Studiengesellschaft Kohle Mbh

Niklas Meine

Hartmut Nefzger

Torsten Hagen

Jan Heijl

Jens Langanke

Roberto Rinaldi

Erik Sluyts

Peter Nordmann

Ferdi Schüth

Natalie Bittner

Michael Baecker

Michael Schedler

Jakob Hilgert

Gernot JÄGER

Mats KÄLDSTRÖM

The invention relates to a method for producing a specific hydroxyl compound by decarboxylating a specific carboxylic acid compound or a salt of said carboxylic acid compound in the absence of a catalyst and to a method for producing a bisphenol.

Method for producing a hydroxy compound by decarboxylation in the absence of a catalyst

The invention relates to a process for preparing a specific hydroxy compound by means of decarboxylation of a specific carboxylic acid compound or a salt of said carboxylic acid compound, to a method for preparing a diaryl carbonate, a bisphenol or a polycarbonate, a diaryl carbonate or bisphenol, a polycarbonate, and to a method for adjusting the isotope ratio of C14 to C12 in a polymer. A specific solvent is used during decarboxylation.

Process for preparing a hydroxy compound by means of decarboxylation

The present invention relates to a method for obtaining a high yield of sugar alcohols containing five to six carbon atoms from cellulose-containing materials. In a first step the starting materials (for example microcrystalline cellulose, alpha-cellulose, wood and cellulose-containing residues, such as sugar cane bagasse or wood shavings) and an acid are brought into close contact with the substrates by a impregnation carried out in the liquid or gaseous phase. In addition, in a second step the starting materials impregnated with acid and preferably dried are brought into contact by the action of mechanical energy, such that the cellulose-containing materials are degraded into water-soluble products. Subsequently, in a third step, sugar alcohols having five to six carbon atoms are obtained in a high yield and in high selectivity from the water-soluble products in aqueous solution by hydrolytic hydrogenation by means of a metal-containing catalyst under hydrogen pressure.

Method for obtaining sugar alcohols having five to six carbon atoms

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Düsseldorf, Germany

Niklas Meine