Union Rheinische Braunkohlen Kraftstoff Aktiengesellschaft

Rheinische Braunkohlenwerke Ag

Karl-Heinz Keim

Joachim Korff

Ewald Meisenburg

Max Fremery

Kurt Erdt

Wilfried Dolkemeyer

Heinrich Muller

Axel Giehr

Reinhard Kiauk

This invention relates to an improved process for the reprocessing of carbon containing wastes by pretreating the same thermally in the presence or absence of hydrogen, followed by hydrogenation of the pretreated material at elevated temperature and at least 200 bar hydrogen pressure.

Process for the reprocessing of carbon containing wastes

The instant invention relates to fuels based on methanol and/or ethanol which contain additionally mixtures of C.sub.4 -hydrocarbons with C.sub.5 /C.sub.6 - and/or C.sub.5 -C.sub.7 -hydrocarbons and/or gasoline.

Motor-fuels

The instant invention relates to a process for the conversion of meta/para-cresol mixtures by catalytically methylating the meta/para-cresol mixtures in their ortho-positions, separating the 2,3,6- and 2,4,6-trimethylphenols formed and converting subsequently the 2,4,6-trimethylphenol in the presence of iron oxide(s) or catalysts which contain iron oxide(s) and at least one additional oxide, to a mixture of methyl phenols, which is essentially free from meta-substituted methylphenols.

Process for the conversion of meta/para-cresol mixtures

This invention relates to a process for isomerization and transalkylation of alkylphenols and for phenol-derivatives in the presence of a catalyst comprising ironoxide (s) and at least one additional oxide and in the case of 2,4,6-trimethylphenol and 2,4-dimethylphenol as alkylphenol feed, of ironoxide (s) or of a catalyst comprising ironoxide (s) and at least one additional oxide.

Process for isomerization and transalkylation of alkylphenols

Process for the production of pumpable coal slurries

This invention relates to a process for reacting phenol, mono- and di-alkyl phenols having at least one free o-position with methanol and/or dimethyl ether in the gas phase to form o-substituted phenols in the presence of a catalyst of oxides of iron, chromium, silicon and at least one oxide of an alkaline-earth metal, lanthanum and manganese or in the presence of a catalyst of oxides of iron, chromium, a metal from the group comprising germanium, titanium, zirconium, tin, lead, and at least one oxide of an alkali metal, alkaline-earth metal, lanthanum and manganese.

Catalysts for the o-substitution of phenols

Improved process for the production of acetaldehyde and ethanol by reacting methanol with carbon monoxide and hydrogen in the presence of a catalyst system containing cobalt, elemental iodine or bromine as promotor and a polydentate phosphorus, arsenic, antimony or bismuth compound using one or more metals from the group comprising chromium, molybdenum, tungsten, uranium, titanium, vanadium, iron and nickel as co-catalyst.

Process for the production of acetaldehyde and ethanol

This invention relates to a process for the production of acetaldehyde and ethanol by reacting methanol with carbon monoxide and hydrogen at elevated temperature and pressure in the presence of a catalyst containing cobalt, biphosphine, biarsine or bistibine and hydrogen iodide and/or hydrogen bromide.

Process for the o-substitution of phenols

Isomerization of o-cresol to m-cresol by contact with a crystalline aluminosilicate zeolite of the ZSM-type, having a silica to alumina ratio greater than 5, at a temperature of about 350.degree. to 450.degree. C.

Growing community of inventors

Heimerzheim, Germany

Karl-Heinz Keim