TAYABAS PETROLEUM. 



One hundred cubic centimeters of the refined oil measured at 15° were 

 distilled bv Engler's method with the following- results : 



Initial boiling point, 80° 

 First fraction, 80° to 150° 

 Second fraction, 150° to 300° 

 Third fraction, 300° to 350° 

 Residue above 350° by difference 



Total 



Per cent by volume, Specific gravity 



cubic centimeters. 



at 



40 



0.746 



45 



0.805 



7 





8 









100 



Paraffine was determined by Holde's method 5 on the residue remaining from 

 the distillation of the crude oil to the temperature of 250°, it being shown 

 previously that no solid hydrocarbons were carried over at this temperature. 

 The residue from 100 cubic centimeters of oil was transferred to an Erlenmeyer 

 flask, diluted with an equal volume of ether and absolute alcohol (1 to 1 by 

 volume), the solution cooled to — 20° and filtered with suction through a double 

 filter also cooled to — 20°. The precipitated paraffine was washed with cold ether- 

 alcohol mixture until free from oil and almost pure white in color. It was then 

 dissolved from the filter with hot benzene and evaporated to constant weight at 

 100°. The amount found was 6.775 grams or 8.1 per cent, calculated upon the 

 weight of 100 cubic centimeters of the oil at 15°. 



Asphalt was determined by Holde's method, which consists in shaking 1 cubic 

 centimeter of residue with 40 cubic centimeters of light petroleum; after 

 forty-eight hours standing, the precipitated asphalt is filtered and weighed. 

 The gasoline for this determination was Kahlbaum's ligroi'n, purified with 

 sulphuric acid and distilled over sodium, using the fraction boiling between 65° 

 and 95°. The amount of asphalt found was' 0.08 per cent. 



SUMMARY. 



1. Tayabas oil is characterized by its comparatively high proportion 

 of volatile hydrocarbons, by having a paraffine base and by being sulphur 

 free. In these respects it resembles Pennsylvania petroleum. 



2. It contains a greater proportion of volatile constituents boiling 

 under 150° than most crude petroleums, and herein lies its greatest local 

 value. 



3. It "contains 30 per cent of unsaturated hydrocarbons, which are 

 removed by the acid refining process, again resembing Pennsylvania pe- 

 troleum, which, according to Bugler, 7 contains 28 per cent by volume 

 soluble in sulphuric acid. 



4. It is essentially a paraffine petroleum, which, according to Peck- 

 man, 8 is the best kind of oil for fuel, illumination or lubrication. 



5. The crude petroleum examined was fresh seepage oil pumped from 

 a 40-meter well, and is therefore' considered representative of the oil 

 from the oil-bearing strata of its source. 



= Untersuch. d. Mineralole u. Fette. Berlin, 2nd ed. (1905), 21. 



6 Loc cit. 



7 Ber d. deutch. Chem Ges., Berlin (1895), 28, 2501. 

 'Journ, Soc. Chem. Tnd. London (1900), 19, 1001. 



