130 THE ROYAL SOCIETY OF CANADA 



Appendix II. 



Extraction Tests 



Preliminary Note By E. Stansfield, M.Sc, and 

 R. C. Cantelo, B.Sc. 



Some extraction tests have been made on lignite for the following 

 reasons: to make a comparison between Canadian and German 

 lignites, and to show how the various Canadian lignites differ amongst 

 themselves. Similar tests were also made on peat. This work is 

 still in progress. 



The results are summarized in the following table. 



Table VIII 



Extraction Tests on Shand Lignite and Alfred Peat 



Note. — The yields are expressed as percentages by weight of the dry material. 



The extracts from both lignite and peat in the Soxhiet apparatus 

 consisted of dark reddish-brown, resinous material. The autoclave 

 extracts consisted of black, tarry material. The lignite appeared 

 unchanged after treatment in the autoclave. The peat had become 

 much darker in colour and much smaller in volume, and showed an 

 unaccounted-for loss of 21% by weight; presumably this was due to 

 the formation of water and gas. 



German lignites have been recorded as showing over 10% soluble 

 in benzine in a Soxhiet extraction, whilst Fischer and Gludd^ obtained 

 25% benzene-extraction in an autoclave. Comparison with the above 

 results on Shand lignite show clearly why, although certain German 

 lignites can be briquetted without the addition of a binder. Souris 

 lignites cannot be so treated. 



iBer. 49 1460-8 (1916). 



