 
					
					
						CRUDE OILS					
				 
				
					
						 المؤلف:  
						sami matar & Lewis. F. Hatch
						 المؤلف:  
						sami matar & Lewis. F. Hatch					
					
						 المصدر:  
						Chemistry of PETROCHEMICAL PROCESSES
						 المصدر:  
						Chemistry of PETROCHEMICAL PROCESSES					
					
						 الجزء والصفحة:  
						2th  pp .11
						 الجزء والصفحة:  
						2th  pp .11					
					
					
						 23-11-2015
						23-11-2015
					
					
						 1369
						1369					
				 
				
				
				
				
				
				
				
				
				
			 
			
			
				
				CRUDE OILS
    Crude oil (petroleum) is a naturally occurring brown to black flammable liquid. Crude oils are principally found in oil reservoirs associated with sedimentary rocks beneath the earth’s surface. Although exactly how crude oils originated is not established, it is generally agreed that crude oils derived from marine animal and plant debris subjected to high temperatures and pressures. It is also suspected that the transformation may have been catalyzed by rock constituents. Regardless of their origins, all crude oils are mainly constituted of hydrocarbons mixed with variable amounts of sulfur, nitrogen, and oxygen compounds.
