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Indmax fluid catalytic cracking for maximum olefins

The Indmax Fluid Catalytic Cracking (FCC) process is a breakthrough in FCC technology for converting heavy feeds, including residue, selectively to propylene and other light olefins (ethylene and butylenes). It combines Lummus Technology’s FCC process with the proprietary Indmax(1) catalyst formulation and process conditions developed by Indian Oil Corporation Limited’s Research and Development Center. Lummus Technology is responsible for the design and licensing of Indmax FCC units globally.

The Indmax FCC unit selectively produces propylene and other light olefins with very high feedstock conversion: up to 45% of the feed can be converted to light olefins, with propylene in LPG (i.e., the combined C3/C4 products) or ethylene in dry gas as high as 50%. It is designed for and operated at Indmax process conditions: riser reactor temperature from 560° to 600°C, catalyst-to-oil ratio from 12 to 20, and lower hydrocarbon partial pressure compared to conventional FCC operations. The Indmax catalyst is a multi-component, proprietary formulation that is specifically tailored for each facility depending on the feedstock and product objectives. It is highly metals-tolerant and produces low delta coke and dry gas – properties that are particularly important when processing residue to make light olefins.

Typically the Indmax FCC process uses only shortcontact- time riser cracking, but is inherently more flexible than a typical FCC unit because the product slate can be easily adjusted to maximize propylene, maximize gasoline, or produce combinations such as propylene plus ethylene or propylene plus gasoline. This process flexibility is a key variable in maximizing profitability in a given market scenario.

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Indmax fluid catalytic cracking for maximum olefins

The Indmax Fluid Catalytic Cracking (FCC) process is a breakthrough in FCC technology for converting heavy feeds, including residue, selectively to propylene and other light olefins (ethylene and butylenes). It combines Lummus Technology’s FCC process with the proprietary Indmax(1) catalyst formulation ...


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