Petroleum refining gasoline isomerate

ZSM-5 is a Mobil-proprietary, shape-selective zeolite which is used commercially in synthetic fuels (methanol-to-gasoline), petrochemicals (xylene isomerization, toluene disproportionation, benzene alkylation) and in petroleum refining (lube and... 

Tn commercial petroleum refining, isomerization of light paraffins has been A applied for many years. Until recently the scope of the process was limited, however, and its main application was isomerization of butane as feed preparation for alkylation processes. Generally, except for a few specific cases, no commercial justification could be found for isomerization of pentane and hexane fractions since in most cases the quality requirements for motor gasoline could be met by alternative processing routes and by addition of various additives, such as lead tetraalkyls, to improve fuel burning characteristics. 

Isomerization, carbon-carbon bond scission (cracking), and carbon-carbon bond formation (alkylation) are among the most imp>ortant hydrocarbon conversion reactions catalyzed by acids. Zeolites are often used to carry out these reactions during the refining of petroleum. Some of the zeolites are particularly active to convert olefins and cycloparaffins to paraffins and aromatics to produce jet fuel and gasoline. 

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