Über den Trockenprozeß des Leinöls

Auto-oxidation.

“…It has long been recognized that organic peroxides, presumably of the moloxide type, are formed during the initial stages of the oxidation of oil films, but to produce a stable film, a further change of the peroxide is invariably necessary. Accordingly, the suggestion was made by Fahrion (256) and others (257) that interaction between the moloxides so formed and the unoxidized oil results in monoxides which may further polymerize, probably in accordance with the scheme proposed by Staudinger (166a). The alternative suggestion, that this reaction results in the production of 1, 4-dioxane ring systems, has been made by Marcusson (258) and by Eibner and Munzert (259).…”

Drying Oil Oxidation Mechanism, Film Formation, and Degradation - Enthalpy, Entropy, and Isobaric Heat Capacity at 100° to 1000° C. and 50 to 1400 Bars

“…In recent years the older theory (7,14,17) that the peroxidation mechanism is due to the formation of a peroxide ring who postulates that the autoxidation of drying oils proceeds by a radical chain mechanism which results in the formation of a hydroperoxide group (-OOH) at the -methylenic group adjacent to the double bond carbon atom.…”

“…There have been many postulations as to the nature of decomposition products that are formed after the initial stages of autoxidation such as the dehydration of peroxides to form ketone groups (18), formation of monoxide groups by loss of oxygen (8), rearrangement of cyclic peroxides to form ketones and hydroxyls (7,11), and the breakdown of the carbon chain to form aldehyde groups (18,20). Since all these mechanisms apparently were / O-O \ based on the belief that the cyclic peroxide Í__q_) is the X II H / dominant form of oxidation, they are more or less inconsistent with the later theory of Farmer.…”

“…Values for 75°to 150°C. (7) were assumed correct; those for 200°to 500°C. (4) and for 600°to 1000°C.…”

“…Note 2161, 1950. (8) Longwell, J. P., in "Selected Combustion Problems, Fundamentals and Aeronautical Applications," AGARD NATO Combustion Colloquium, Dec. [7][8][9][10][11]1953, pp. 508-10, Butterworth, London, 1954.…”