Method of isomerizing N-paraffins into isoparaffins

Details Method of isomerizing N-paraffins into isoparaffins Method of isomerizing N-paraffins into isoparaffins

1995-02-08

1998-06-09

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Saturated compound synthesis

By isomerization

585747, 585734, 502 20, 502227, C07C 513, B01J 2120, B01J 2713

Patent

active

057637326

ABSTRACT:
A method of isomerizing n-paraffins into isoparaffins in a cut of hydrocarbons with four carbon atoms or of hydrocarbons with five and/or six carbon atoms. The cut being processed enters at least one reactor containing a stationary catalyst bed. The charge travels over the bed. Either the rate of isomerization in the effluents or a parameter directly dependent thereon (such as the octane number) is preferably continuously measured. Some of the upstream catalyst, specifically between 1/3 and 2/3, is replaced with fresh catalyst once that rate has decreased 10 to 30% below a prescribed point. The charge is redirected through the reactor once the catalyst has been replaced.

REFERENCES:
patent: 3440300 (1969-04-01), Estes et al.
patent: 3791960 (1974-02-01), Davies et al.
patent: 4049739 (1977-09-01), Zabransky et al.
patent: 5523503 (1996-06-01), Funk et al.

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