Basf Aktiengesellschaft

Waldemar Koehler

Franz Merger

Peter Horn

Friedrich Towae

Rolf Schneider

Fritz Brunnmueller

Eckhard Hetzel

Hans Hellbach

Ludwig Vogel

Gunther Isbarn

Berthold Mueller

Karlheinz Stecher

Bernd Blumenberg

Rolf Bittler

Ubbo V Oehsen

A process for the thermolytic cleavage of formamide to give hydrocyanic acid and water over alumina or alumina/silica moldings subjected to final sintering or over high temperature corrosion-resistant stainless steel packings in the presence of atmospheric oxygen possesses, in particular, high HCN selectively and a high formamide conversion.

Cleavage of formamide to give hydrocyanic acid and water

Hexamethylene diisocyanate and/or isomeric alkylene diisocyanates having 6 carbon atoms in the alkylene radical, preferably 2-methylpentamethylene 1,5-diisocyanate and/or 2-ethyltetramethylene 1,4-diisocyanate are prepared without the use of phosgene in a multiple-step process by means of

Multiple-step process for the preparation of hexamethylene

A process for separating toluene diisocyanate and/or higher boiling solvents from distillation residues obtained from the phosgenation of toluene diamine in the presence of solvents wherein the separation takes place in a fluidized bed at temperatures of 140.degree. C. to 280.degree. C.

Separating toluene diisocyanate and/or higher boiling solvents from

A process for the continuous manufacture of organic monoisocyanates, diisocyanates and/or polyisocyanates from the corresponding organic amines and phosgene in the presence of inert organic solvents, with recycling of the reaction mixture, wherein the streams of liquid, consisting of the recycle stream and the amine feed solution, are fed to the reaction mixture at a rate such that an energy dissipation density of from 5 to 1,000 kJoule per m.sup.3 of recycled reaction mixture plus amine feed solution is generated in the mixing and reaction zone.

Continuous manufacture of organic isocyanates

Growing community of inventors

Frankenthal, Germany

Waldemar Koehler