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according acetic acid value added alkali amount apparatus aqueous asphalt benzol boiling bromine c.c. of oil c.c. of water calculated candle carbon cent alcohol ceresine Chem chloride color condenser cooling crude oil cylinder oils detected determined dissolved distillation drop Engler degrees esters evaporated extracted fatty acids fatty oils filter filtrate flash point flask fractions gives glass glycerine grams of oil hydrocarbons hydrochloric acid ignition insoluble iodine value kerosene layer liquid lubricating oils Marcusson material melting point method mineral oils mixture molecular weight naphtha natural asphalt neutral obtained odor oils containing oleic acid olein oxidation oxygen paraffin Pensky petroleum ether pitch potassium precipitate present rape oil residue resinous rosin oil salts sample saponification value separated shaken soap sodium hydroxide solid soluble solution solvent specific gravity steam stearic acid substances sulphuric acid tion titrated turpentine unsaponifiable unsaturated vaseline vessel volatile washed water bath