﻿Manchester Memoirs, Vol. xlix. (1904), No. %. 



II. Note on the Electrolytic Preparation of Titanous 

 Sulphate. 



By W. H. Evans, B.Sc. 



(Co?nfnu?iicated by Mr. jR. S. Button, M.Sc.) 

 Received and read November 1st, 1904. 



Despite the important applications of the titanous 

 salts during the last few years, and the fact that they are 

 now prepared technically by electrolysis/" no data have 

 been published to show the influence upon the yield of 

 varying the conditions of working. It seemed, therefore, 

 of some interest to investigate the effect of the current 

 density, concentration of solution and temperature at 

 which the electrolysis is carried out, upon the course of 

 this electrolytic reduction. Up to the present only tita- 

 nium sulphate has been dealt with. 



In the earlier work the solutions were electrolysed in 

 a beaker, with a porous pot to separate the anode from 

 cathode chambers, but it was soon found that the solution 

 of titanous sulphate, despite the very powerful reducing 

 properties of this compound, is quite stable, and that very 

 good yields could be obtained without the use of any 

 diaphragm. Provided the current density at the anode is 

 kept fairly high, the oxygen is evolved without effecting 

 any marked oxidation of the titanous salt. This, of course, 

 considerably simplifies the preparation, and in all the later 

 work the electrolysis was carried out in a beaker or vat in 

 which the electrodes were suspended at some distance 



* Howard Spence and P. Spence and Sons Brit. Patents, Nos. 18,108, and 

 16,238 of 1902. 



December 1st, 1904. 



