Method of obtaining preparations from unroasted coffee beans in which ground coffee is flooded with a mixture of alcohol and water, sulfuric acid is added, then heated to reflux, then cooled, filtered under reduced pressure, washed with a mixture of alcohol and water, the effluent is neutralized with sodium hydroxide and concentrated and then dried to give chlorogenic acid and caffeine, wherein the ground coffee is subjected to high temperature steam, then cooled and flooded with chloroform, then the chloroform is removed from the resultant mixture by filtration in vacuo and the ground grain is washed with chloroform and squeezed and then treated with steam at high temperature and flooded with a mixture of alcohol and water and sulfuric acid is added then, in a known manner, the resulting mixture is heated to reflux, cooled, filtered under reduced pressure, and the grounds are washed with a mixture of alcohol and water and the liquid is neutralized with calcium hydroxide the liquid is filtered, concentrated and dried to give chlorogenic acid and caffeine, and the resulting chloroform phase is concentrated and extracted and evaporated to give the green coffee oil and crystalline, white caffeine.
