A procedure for the obtaining of the treo-9,10-dihydroxioctadecanodioico (floionico) acid and treo-9,10,18-trihidroxioctadecanoico (floionolico) acid from the cork. (Machine-translation by Google Translate, not legally binding)

摘要

Procedure for the obtaining of treo-9,10-dihydroxioctadecanodioico acid, i, and treo-9,10,18-trihidroxioctadecanoico acid, ii, from the cork. Cork is submitted to an alkaline methanolysis with alkaline metal and methanol in excess, during a period of time that will vary 4-6 hours, hot, or several days, in cold. The filtered liquid is evaporated to dryness and the dissolved waste in acetic acid is subjected to a trans-hydroxylation by adding oxygenated water and concentrated sulfuric acid, at a temperature of 40-45ºc during 3 to 5 hours. The solution is treated with hiding water, producing a precipitate when cooling which submits to a saponification by dispersion in water and addition of alkaline hydroxide heating up to reflux of 3 to 5 hours. It is filtered in hot to separate the unsolved solid and the filtrated by acidification with mineral acid precipit a crystalline mixture of the acids to obtain. (Machine-translation by Google Translate, not legally binding)