IG Farben

Rowley, Utah American Magnesium Co. 13.6 1977 modified IG Farben magnesium 9... 

Although first prepared about 1930 by scientists at the German chemical company of IG Farben the early products showed no properties meriting production on technical grounds. However, towards the end of the 1930s commercial production of the copolymer commenced in Germany as Buna S. (The term Buna arose from the fact that the early polymers of butadiene were made by sodium (Na) catalysed... 

Commercial interest in poly(vinyl chloride) was revealed in a number of patents independently filed in 1928 by the Carbide and Carbon Chemical Corporaration, Du Pont and IG Farben. In each case the patents dealt with vinyl chloride-vinyl acetate copolymers. This was because the homopolymer could only be processed in the melt state at temperatures where high decomposition rates occurred. In comparison the copolymers, which could be processed at much lower temperatures, were less affected by processing operations. 

The high thermal stability of the carbon-fluorine bond has led to considerable interest in fluorine-containing polymers as heat-resistant plastics and rubbers. The first patents, taken out by IG Farben in 1934, related to polychlorotri-fluoroethylene (PCTFE) (Figure 13.1 (a)), these materials being subsequently manufactured in Germany and the United States. PCTFE has been of limited application and it was the discovery of polytetrafluoroethylene (PTFE) (Figure... 

I German Patent, 677,071 French Patent, 796, 026 British Patent, 465, 520 (IG Farben)... 

Copolymers of vinylidene chloride with 5-50% acrylonitrile were investigated by IG Farben during World War II and found to be promising for cast films. Early patents by ICC and Dow indicated that the copolymers were rigid, transparent and with a high impact strength. 

In the so-called Dormagen process developed by IG Farben the cotton was first preheated with 30-40% of its own weight with glacial acetic acid for 1-2 hours. The pretreated material was then fed to the acetylisers, which consisted of horizontal bronze cylinders. For every 100 parts of pretreated cellulose there was added the following acetylating mixture, previously cooled to 15-20°C ... 

In 1929, Linsted obtained samples of this complex from ICI chemists (Scottish Dyes Ltd was now owned by ICI). ICI had developed two routes leading to the phthalocyanine iron complex. One method started from phthalic anhydride, iron, and ammonia, while the second pathway proceeded from phthalimide, iron sulfide, and ammonia. In 1933/34, elucidation of the phthalocyanine structure was credited to Linstead. The corresponding copper and nickel phthalocyanines had been prepared in the meantime. ICI introduced the first Copper Phthalocyanine Blue to the market as early as 1935, and the Ludwigshafen subsidiary of the IG Farben-industrie followed suit with a corresponding product. 

Figure 23—1.) Six years later, a German scientist at IG Farben-Industrie, Max Fischer, was attempting to synthesize lube oils from ethylene. He tried a catalyst of aluminum powder and titanium at low pressures and ended up with a solid, white, wax-like material—polyethylene again.

Note It has been claimed by the GerP 7340 25 of IG Farben-Industrie.CA 38,... 

Weiss-Salz (White Selt). A compd, (H2C N.-S03K)3, produced in 1944 by the IG Farben-industrie at Hochst am Main, as an intermediate in the manuf of Hexogen. The compd was shipped to the Nobel plant at Hamburg, where it was nitrated. The production of white salt was stopped as soon as the method of direct nitration of hexamethylenetetramine to Hexogen was improved to make it more economical Refs 1) R.E. Richardson et al, CIOS Rept 25-18 (1945), 28-29 2) B.T. Fedoroff et al,... 

The carboxylation of epoxides (Equation 7.13) has long been known (IG Farben, 1943) [12, 117, 118], and today is available on stream from several production plants. 

Office of Chief of Counsel for War Crimes, British Military Tribunal, Case against B. Tesch et al., here, the sworn statement of A. Zaun, Hamburg Oct. 24, 1945, Document No. NI-11 396 quoted according to U. Walendy, Auschwitz im IG-Farben-Prozefi, Verlag fur Volkstum und Zeitgeschichtsforschung, Vlotho 1981, p. 62. 

Udo Walendy, Auschwitz im IG-Farben-Prozefi, Verlag fur Volkstum und Zeitgeschichtsfor-schung, Vlotho 1981... 

It is possible that Hitler had in mind the new nerve gas. After all, in the same month the German chemical industry was ordered to put in hand plans to build the new factory at Dyhernfurth which was hoped to be capable of producing 1000 tons of tabun a month.9 A new company, Anorgana, was formed under the auspices of Otto Ambros of IG Farben,10 and through Anorgana, Ambros provided the chemists and... 

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