through the gaseous escape pipe 12 the coldest nitrogen cools the last low carbon chain hydrocarbons left in the gaseous escape pipe 12 as the nitrogen gas warms it condenses the longer carbon chain hydrocarbons to where the longest as collected in the cold cracker 13 closest to the shaft 10 to separate the kerosene from the gasoline and petroleum ethers and fuel gases segment output pipes 14 draw the condensed hydrocarbons in sections of the pipe 12 these liquids pass through the trap 17 and go to storage shown in fig5 the final output of the gaseous escape pipe 12 is the nitrogen gas 3 left in the pipe which is dispersed being mixed with air by a fan 38 for safety and to prevent clouding of pure nitrogen 3 a tan 38 is employed to mix the nitrogen with the residual air so there is no opportunity for people or animals to develop nitrogen asphyxiation or nitrogen coma a reflex of the lungs when oxygen is not available and carbon dioxide cannot be exchanged in the lungs breathing stops but the heart keeps pumping and one loses consciousness there are about six minutes from when one is so stricken until he or she or an animal would die with these nitrogen employing methods one should be aware of the possibility of this condition and if finding a person down one should think first to apply artificial respiration with a good mix of.