There are currently two types of dewaxing that are being used commercially. The first dewaxing process is called solvent dewaxing. Solvent dewaxing is a physical process that separates the wax by freezing or solvent transport. The other type of dewaxing, Catalytic dewaxing, is a chemical process, which is unlike the physical process used for solvent dewaxing. Catalytic dewaxing uses a chemical process to remove the wax through a reaction of long chain n-alkenes. First the solvent dewaxing process will be discussed. The solvent is cooled until the wax compound freeze to form crystals. The solvent with the frozen wax crystals is carried into a rotary filter where the wax crystals get caught in a filter cloth. The layer of wax on this cloth is then scrapped by a blade and carried away in a solvent stream. The solution then goes through a steam stripping process to recover the solvent. The chemical process of catalytic dewaxing is much different then the process of solvent dewaxing. This process uses a selective cracking processe to “crack” n-alkanes. This cracking process takes place in pores of a catalyst that has openings about 0.6nm in diameter. This keeps out the i-paraffins because of their larger size. Hydrogen is also introduced into this process to prevent coking on the catalyst. Hydrogen prevents disproportionation which in turn prevents coking. This process has a much higher yield then the solvent dewaxing as well as producing a lube base stock with a much lower pour point. The catalytic dewaxing has many advantages over the solvent dewaxing. The chemical process of catalytic dewaxing has a much lower capital investment then that of the physical process of solvent dewaxing. The cracking of n-paraffins that takes place in catalytic dewaxing produces a by product of distillate fuels such as gasoline. Overall catalytic dewaxing is a more advantageous process then solvent dewaxing.