28 



Transactions. 



The oil was redistilled 

 Below 200° C. 

 200°-250° C. 

 250°-300° C. 

 300°-350° C. 

 Above 350° C. 

 Residue . . 

 Loss 



into the following fractions : — 



7-0 (naphtha). 

 11-5 ) 



14-0 



18-0 



41-0 



6-0 



2-5 



100-0 



burning-oils, 

 lubricating-oils. 



The distillate above 350° C. contained 14-2 per cent, of paraffin of 

 melting-point 58-5° C, equivalent to 22 lb. paraffin per ton of shale. 



If all the fractions were collected in the same vessel they would give once- 

 once-run shale-oil, 91-5 per cent, (equivalent to 34-75 gallons per ton of shale). 



The fuel values of this and of the crude oil were determined in the 

 calorimeter, together with a crude oil from the Orepuki Shale-works, year 

 1903, and crude Taranaki petroleum, received in 1906 (No. 562). The 

 sulphur was also estimated at the same time. The results were : — 



A good fuel-oil should not contain more than 0-5 per cent, of sulphur. 



The yield of ammonium sulphate, 8 lb. per ton of shale distilled, is 

 low. It would be increased if the distillation were conducted in the pre- 

 sence of superheated steam, as is usual in working practice ; but even if all 

 the nitrogen were recovered in this form it would not exceed 28-3 lb. per ton. 



The gas from the distillation had the following composition : — 

 Carbon dioxide . . . . . . 18-3 



Oxygen 



Carbon monoxide 



Methane 



Hydrogen 



Nitrogen 



1-0 

 14-3 



37-3 



22-3 



6-8 



100-0 

 were not determined, would be partly 



(Sulphur compounds, which 

 included in the carbon dioxide.) 



When purified from carbon dioxide the composition would be :— 



Oxygen . . . . . . . . 1-2 



Carbon monoxide (CO) . . . . 17-5 



Methane (CH J . . . . . . 45-7 



Hydrogen . . . . . . . . 27-3 



Nitrogen . . . . . . . . 8-3 



100-0 



