On the Determination of Total Oxygen in Titanium Tetrachloride and Its Apparatus (Studies on the Determination of Total Oxygen in Titanium Tetrachloride—1st Report.)

Abstract

A method for determining total oxygen contained in titanium tetrachloride, one of the raw materials in Kroll process, has been studied in order to control the oxygen content which has a marked effect on the properties of the titanium metal. This paper contains the following results. (1) The chemical properties of titanium tetrachloride, the various types of oxygen-containing impurities in titanium tetrachloride, and also the applicability of the conventional methods for oxygen analysis to titanium tetrachloride have been studied. And it has been considered that all of the oxygen in the volatile parts of these impurities may be converted to carbon monoxide by the carbon-reduction-thermal decomposition method in argon-bromine atomosphere and determined gravimetrically as carbon dioxide, while oxygen in the non-volatile parts may be retained as titanium dioxide and calculated from the determined value of titanium in this titanium dioxide. (2) As the results of detailed preliminary work, a carbon-reduction—thermal decomposition apparatus for analysing the total oxygen in titanium tetrachloride by the proposed method was developed, in which a sampler devised to eliminate any contamination through out the operation from taking the sample to inserting it into the apparatus and a platinum-lined reaction tube that forms no blank due to packed carbon are used.