Peroxides removal from isopropyl ether

Peroxides, removal from isoprene, 29,59 removal from isopropyl ether, 22,3 removal from o-tetrabne, 20, 95 Pexphthauc acid, mono-, 20, 70 Petroleum ether, 23,102, 104 Phenacyl chloride, 24, 25, 26 Phenanthrene, 28, 19 purification of, 28, 19 Phenanthrene-9-ai.dehvde, 28, S3 Phenanthrene, 9-bromo-, 28,19 9-Phenanthrenecarboniteile, 28, 7, 34... 

Oglialoro modification of, 708 Perkin triangle, 108, 218f Kon modification of, 109 Peroxides, detection of, in ether, 163 removal from diethyl ether, 163 removal from isopropyl alcohol, 886 Petroleum ether, purification of, 174 Phenacetin, 996, 997 1 10-Phenanthroline, 991, 992 p-Phenetidine, 997, 998 Phenetole, 665,670 Phenobarbitone, 1003,1004,1005 Phenol, 595, 613 Phenol aldehyde polymers, 1016 formation of, 1022 Phenolphthalein, 984, 985 action as indicator, 984 ... 

The commercial product usually contains appreciable quantities of peroxide this should be removed by treatment with an acidified solution of an iron(n) salt or with a solution of sodium sulphite (see under 15. Diethyl ether). The diisopropyl ether is then dried over anhydrous calcium chloride and distilled, the fraction b.p. 68.5 °C/760 mmHg being collected. Di-isopropyl ether should be stored in brown bottles away from the light. A small amount of hydroquinone (2 x 10 5 m) may be added as a peroxide inhibitor. 

A simple method for removing peroxides from high-quality ether samples without need for distillation apparatus or appreciable loss of ether consists of percolating the solvent through a column of Dowex-1 ion exchange resin. A column of alumina was used to remove peroxides and traces of water from ethyl ether, butyl ether, dioxane, and petroleum fractions and for removing peroxides from tetrahydrofuran, decahydronapthalene(decalm), 1,2,3,4-tetrahydro-naphalene (tetralin), cumene and isopropyl ether. 

A student working in a laboratory needed a chemical for an experiment. While looking for this chemical he came across a bottle of isopropyl ether. He remembered that isopropyl ether was well known for explosions from peroxide formations. As he looked at it, it appeared to be filled with large crystals and he knew that it should be a liquid, not a solid. He reported this to his professor who came to look at the bottle too. The professor ordered everyone out of the stockroom and called local emergency response officials who sent out the bomb squad. The bomb squad removed the bottle for controlled detonation in an open field. 

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