Multi-catalyst selection for chlorided reforming catalyst

Details Multi-catalyst selection for chlorided reforming catalyst Multi-catalyst selection for chlorided reforming catalyst

2004-12-17

2008-08-12

Griffin, Walter D. (Department: 1797)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

Reexamination Certificate

active

07410565

ABSTRACT:
The chloride retention of an alumina catalyst over the course of operation and regeneration can be controlled and stabilized by incorporating a small amount of a component selected from the group including phosphorus, boron, titanium, silicon, and zirconium. Steam treatments have been used to simulate commercial hydrothermal stability and a small amount of the stabilizer component has been discovered which balances chloride retention. Moreover, in a multi-catalyst hydrocarbon conversion process, such as the two-step reforming of naphtha, it has been discovered that proper selection of a catalyst having lower chloride retention in combination with another catalyst having higher chloride retention results in a process with increased yield and/or higher octane gasoline.

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