Patent ID: 6086837
Filing Date: 2000-07-11
Classification: C01B

Abstract:
A method for preparing a tetradecahydroundecaborate ion comprising contacting in an inert, non-aqueous solvent medium and at a temperature of from about 85.degree. C. to about 135.degree. C.:(a) a tetrahydroborate having the formulaMBH.sub.4wherein M represents an ion selected from the group consisting of sodium, potassium, lithium, cesium, rubidium, and lower alkyl ammonium;(b) an alkyl halide of the formulaRXwherein R represents an alkyl group of from 1 to about 10 carbon atoms and X represents chloride, bromide, or iodide; and(c) a catalyst selected from the group consisting of iodine, alkali metal iodides, ammonium iodide, bromine, alkali metal bromides, ammonium bromide, and mixtures thereof;with the proviso that an additional amount of said catalyst is added to said inert, non-aqueous solvent medium over and above any of said catalyst that is formed in situ during said contacting process.