%A"Bataafsche, N V" %A"de Brey, J H.C." %D1918 %I; %2 %J[] %K04 OIL SHALES AND TAR SANDS, 02 PETROLEUM, HYDROCARBONS, DISTILLATION, FRACTIONATION, GASES, HIGH TEMPERATURE, MEDIUM TEMPERATURE, OIL SHALES, PETROLEUM, PRESSURIZING, BITUMINOUS MATERIALS, CARBONACEOUS MATERIALS, ENERGY SOURCES, FLUIDS, FOSSIL FUELS, FUELS, ORGANIC COMPOUNDS, SEPARATION PROCESSES, 040403* - Oil Shales & Tar Sands- Refining, 020400 - Petroleum- Processing %PMedium: X; Size: Pages: v %TDistilling hydrocarbons %XHydrocarbons containing a very volatile constituent and less volatile constituents, such as casing-head gases, still gases from the distillation of crude petroleum and bituminous shale are separated into their constituents by rectification under pressure; a pressure of 20 atmospheres and limiting temperatures of 150/sup 0/C and 40/sup 0/C are mentioned as suitable. The mixture may be subjected to a preliminary treatment consisting in heating to a temperature below the maximum rectification temperature at a pressure greater than that proposed to be used in the rectification. %0Patent %NGB 123522; %1 %CUnited Kingdom %Rhttps://doi.org/ GB %GEnglish