| 摘要 |
1,192,401. Quaternary ammonium hydroxides and alkoxides. NUCLEAR-CHICAGO CORP. 10 April, 1967 [11 April, 1966], No. 16274/67. Heading C2C. [Also in Division G1] Solutions containing the novel compounds of the formula R 1 R 2 XMeN+OY- where R 1 and R 2 are C 4-18 alkyl, X is methyl or benzyl and Y is hydrogen or C 1-7 alkyl and in which the total quaternary ammonium cation concentration is at least 0À17 molar are obtained (a) by dissolving the corresponding quaternary ammonium salt, e.g. a halide, in one or more primary liquid scintillation solvent, removing all dissolved gaseous oxygen and contacting the resultant solution with an anion-exchange hydroxide resin while excluding gaseous oxygen, (b) by reacting the corresponding quaternary ammonium halide with silver oxide, (c) by reacting the corresponding quaternary ammonium halide with a source of alkoxide ions, (d) by reacting the corresponding quaternary ammonium halide with alcoholic potassium hydroxide, or (e) by reacting the corresponding quaternary ammonium methyl sulphate with sulphuric acid and then with barium hydroxide. Suitable scintillation solvents include benzene, toluene, xylene, p-dioxan, 1,2-dimethoxyethane, 1,2,4-trimethylbenzene, mesitylene, 1- methylnaphthalene, anisole, monoisopropyldiphenyl and n-hexane. |
