Other

E.i. Dupont De Nemours and Company

Hoechst Aktiengesellschaft

Max-planck-gesellschaft Zur F&#xf6;rderung Der Wissenschaften E. V.

Michael Wohlers

Edward G Zey

George Kvakovszky

Thomas H Shockley

Michael A Hubbard

Helmut B Witteler

Uwe Dingerdissen

Larry F Charbonneau

Thomas Braun

Rainer Roesky

Robert Schlogl

Harald Werner

Jochen Rieth

Thilo Belz

Robert Schl&ouml;gl

Norbert Kohle

Willard C Brinegar

Werner Kind

A process for the formation of a purified anhydrosugar alcohol is disclosed, whereby the resultant purified anhydrosugar alcohol has a purity of at least 99.8% and is substantially colorless. The anhydrosugar alcohol is purified by distillation, recrystallization from methanol, ethanol or ethylene glycol, melt recrystallization, or a combination thereof. Preferably, the purification is by distillation followed by recrystallization from methanol, ethanol or ethylene glycol. A test for determining the purity of the anhydrosugar alcohol is disclosed, wherein the color of the anhydrosugar alcohol after annealing at a temperature of at least 260&deg; C. for at least four hours is examined. Alternatively, purity can be determined by examination of ultraviolet (UV) transmittance of the purified anhydrosugar alcohol at various wavelengths. The purified anhydrosugar alcohol may be incorporated into a polymer such as a polyester, which may in turn be used to form such articles of manufacturing as containers, optical disks, fibers, sheets and films.

Process and products of purification of anhydrosugar alcohols

A catalyst which consists of amorphous carbon with molecular planes that have curved surfaces and contain six-membered and non-six-membered carbon rings, optionally having at least one catalytically active, low-valency metal covalently bound thereto. Methods of producing the catalyst and applications thereof are included.

Method for the liquid-phase hydrogenation of organic materials

A process is described for continuous production of anhydrosugar alcohol by continuous introducing of sugar alcohols and/or monoanhydrosugar alcohols into a reaction vessel and dehydration in the presence of an acid catalyst and solvent in which the resultant reaction product is soluble. Water and the solvent having the dissolved reaction product are each cointinuously removed from the reaction vessel. The reaction product is separated from the removed solvent and the product is optionally purified to a purity of 99.0% the solvent is recycled in the reaction vessel.

Continuous process for the production of anhydrosugar alcohols

Metal-fullerene intercalation compounds, process for their preparation and use as catalysts Transition metal-fullerene intercalation compounds and a process for the preparation thereof by reaction of transition metal compounds with fullerenes or fullerene-containing carbon black with activation in a solvent.

Metal-fullerene intercalation compounds, process for their preparation

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Eschborn, Germany

Michael Wohlers