Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Patent
1974-12-16
1976-08-10
Levine, Herbert
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
26068367, 26068368, C10G 3900
Patent
active
039740617
ABSTRACT:
An improved vapor phase catalytic isomerization of a hydrocarbon fraction containing C.sub.5 and C.sub.6 isomerizable hydrocarbons is obtained by subjecting the hydrocarbon fraction in the presence of gaseous hydrogen to a plural stage, such as a dual stage, catalytic isomerization operation preferably employing a chlorinated platinum-containing alumina catalyst wherein the hydrocarbon fraction undergoing isomerization is supplied sequentially and serially from the first stage through to the last stage of the plural stage isomerization operation and wherein the first stage of the plural stage isomerization operation is supplied with the hydrocarbon fraction at a temperature in the range about 300.degree.-305.degree.F. and recovered from the first stage at a temperature in the range about 310.degree.-335.degree.F. The last stage of the plural stage isomerization operation is supplied with the hydrocarbon fraction at a temperature in the range about 315.degree.-350.degree.F. and recovered from the last stage at a temperature in the range about 340.degree.-370.degree.F. In the plural stage isomerization operation the catalyst employed in the first stage is active and fresh whereas the catalyst employed in the last stage is relatively inactive or depleted.
REFERENCES:
patent: 3164642 (1965-01-01), Stringer et al.
patent: 3541181 (1970-11-01), Bercik et al.
patent: 3791960 (1974-02-01), Davies et al.
Darsa George J.
Levine Herbert
Ries C. G.
Texaco Inc.
Whaley T. H.
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