![]() Sterilization by ethylene oxide for the preservation of spices was patented in 1938 by the American chemist Lloyd Hall. Since 1940, almost all industrial production of ethylene oxide has relied on this process. Only in 1931 did French chemist Theodore Lefort develop a method of direct oxidation of ethylene in the presence of silver catalyst. Wurtz's 1859 synthesis long remained the only method of preparing ethylene oxide, despite numerous attempts, including by Wurtz himself, to produce ethylene oxide directly from ethylene. The heterocyclic triangular structure of ethylene oxide was proposed by 1868 or earlier. That it differed from other ethers - particularly by its propensity to engage in the addition reactions typical of unsaturated compounds - had long been a matter of debate. This misconception persisted until 1896 when Georg Bredig found that ethylene oxide is not an electrolyte. Wurtz mistakenly assumed that ethylene oxide has the properties of an organic base. Wurtz measured the boiling point of ethylene oxide as 13.5 ☌ (56.3 ☏), slightly higher than the present value, and discovered the ability of ethylene oxide to react with acids and salts of metals. 6.3.2 Chemistry and kinetics of the direct oxidation processĮthylene oxide was first reported in 1859 by the French chemist Charles-Adolphe Wurtz, who prepared it by treating 2-chloroethanol with potassium hydroxide:Ĭl–CH 2CH 2–OH + KOH → (CH 2CH 2)O + KCl + H 2O.6.2 Chlorohydrin process of production of ethylene oxide.5.2 Direct oxidation of ethylene by peroxy acids.5.1 Dehydrochlorination of ethylene and its derivatives. ![]() ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |