Rutgerswerke Aktiengesellschaft

Rutgers Kureha Solvents Gmbh

Robert Zellerhoff

Peter Staglich

Ulrich Knips

Jan Zawadiak

Beata Orlinska

Zbigniew Stec

Jerzy Polaczek

Danuta Gilner

Hans Spengler

Rudolf Oberkobusch

Maximilian Zander

Wilhelm Holtmann

Bodo Friedrich

Zofia Machowska

Franz Kajetanczyk

Bernhard Charpey

Witold Tecza

The process for the production of hydroxy aromatic substances by means of catalytic oxidation of isoalkyl aromatic substance with oxygen, and decomposition of the hydroperoxide thus formed, is based on the concept that isoalkylaromatic substances are emulsified with an aqueous catalyst solution and brought to a temperature ranging from 50.degree. C. up to the boiling temperature of the emulsion; thereupon the oxygen is allowed to act for 2 to 20 hours and the hydroperoxide formed decomposed, in the presence of an inorganic acid as catalyst, into an hydroxyaromatic substance and a ketone.

Process for the production of hydroxy-aromatic substances

In a process for the catalytic oxidation of isoalkylaromatic hydrocarbons into ketones, alcohols and peroxides the isoalkyl- aromatic hydrocarbons in fluid phase at a temperature of 60 to 120.degree. C. are oxidized by oxygen in the presence of a catalyst of metal salt of different valency and alkylammonium salt or alkylphosphonium salt. Further there is claimed a catalyst for the oxidation of isoalkylaromatic hydrocarbons, containing a metal salt selected from copper salts, cobalt salts and manganese salts or their mixtures and an alkylammonium salt or alkylphosphonium salt in a ratio of metal salt to alkylammonium salt or alkylphosphonium salt of 0.5 to 50:1.

Process for the oxidation of isoalkylaromatic hydrocarbons, and catalyst

A process for the preparation of an aromatic hydrocarbon resin modified with aromatic carboxylic acids comprising suspending methane sulfonic acid and at least one aromatic carboxylic acid in an aliphatic solvent and slowly proportioning at least one unsaturated aromatic hydrocarbon into the suspension under polymerization conditions and their salts.

Novel process

In a process for selective crystallization of 2,6-dialkyl-naphthalene selected from the group consisting of methyl-n-propyl-naphthalene, methyl isopropyl-naphthalene, ethyl-isopropyl-napthalene, ethyl-n-butyl-naphthalene, di-n-propyl-naphthalene, diisopropyl-naphthalene, methyl-amyl-naphthalene, ethyl-amyl-naphthalene, propyl-amyl-naphthalene, di-n-butyl-naphthalene and diisobutyl-naphthalene from their isomer mixtures from a polar solvent solution, the improvement comprising effecting the crystallization with constant stirring at a temperature from 25.degree. to -30.degree. C. to obtain the 2,6-dialkyl-naphthalene at least 95% pure.

Recovery of 2,6-dialkyl-naphthalene isomers

A process for the preparation of modified pitches and low boiling aromatics and olefins is described. Waste plastic which consists of polymeric chains of olefins is subjected to a thermal treatment in the presence of high boiling aromatics. The modified pitches may be used for the production of carbon articles of high value.

Process for the production of modified pitches and low boiling aromatics

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Hamminkeln, Germany

Robert Zellerhoff