Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Helmut Alfs

Ferdinand List

Heinz Steiner

Erwin Vangermain

Hans S Keil, Deceased

Klaus Schulze

Georg Bohm

George Boehm

Werner Boexkes

Karl-Heinz Grunheit

Julius Klos

p-tert-octyl phenol is produced by reaction of phenol with diisobutene in the presence of an acidic ion exchanger and water, in a first stage, in a solid-bed reactor at temperatures of 110.degree.-140.degree. C. and under an excess pressure of up to 5 bar. The resultant dioctyl phenol formed as a by-product is alkylated in a second stage in a further solid-bed reactor with phenol in the presence of an acidic ion exchanger, and water at temperatures of 110.degree.-140.degree. C. and under an excess pressure of up to 5 bar to obtain additional p-tert-octyl phenol.

Process for the production of p-tert-octyl phenol by catalytic

A corrosion inhibited composition comprises an aqueous drilling, cutting, or polishing agent, an aqueous hydraulic fluid or an aqueous antifreeze compound; and an alkali metal salt, or an aliphatic amine salt of a mixture of 2- and 3-C.sub.6-12 -alkyladipic acids, the amount of this acid component being effective as a corrosion inhibitor.

Alkali metal or amine salts of a mixture of 2- and 3-alkyladipic acids

In a process for the manufacture of a p-alkylphenol by alkylating phenol with an olefin of 3 to 4 carbon atoms, at an elevated temperature, in the liquid phase, in two reaction zones in series and in the presence of a strongly acidic ion exchange resin as the catalyst, an improvement comprises:

Process for the manufacture of p-alkylphenols

Method and apparatus for the metered conveying of pulverulent solids with the aid of an eccentric screw pump. The pulverulent solids such as terephthalic acid (TPA) are mechanically or pneumatically loosened in the receiving chamber of the pump.

Method and apparatus for the metered conveying of pulverulent solids

An improved process for the continuous alkylation of phenol with olefins having 6 to 12 carbon atoms in the liquid phase and in the presence of strongly acid ion exchange resin catalysts mounted in a fixed bed. The phenol and olefins are passed in a first stage at temperatures from about 80.degree. to 120.degree. C. over an ion exchange resin catalyst having an exchange capacity of from 50 to 96 m Val per 100 ml of catalyst and then passed in a second stage at temperatures about 110.degree. to 130.degree. C. over another ion exchange resin catalyst having an exchange capacity of from 100 to 180 m Val per 100 ml of catalyst.

Process for continuous alkylation of phenol using ion exchange resins

An improvement in the liquid phase air oxidation process based upon a solvent system such as acetic acid and with a bromine activated heavy-metal catalyst system for preparing phthalic, isophthalic and terephthalic acids from their corresponding alkyl benzenes wherein the heavy metal is a soluble cobalt compound and sufficient excess of air is introduced so that the waste gas still contains an excess of oxygen.

Growing community of inventors

Marl, Germany

Helmut Alfs