Mineral oils: processes and products – Chemical conversion of hydrocarbons – Reforming
Patent
1982-09-29
1987-03-17
Davis, Curtis R.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Reforming
585419, C10G 3506, C07C 252
Patent
active
046505652
ABSTRACT:
A process is disclosed wherein a naphtha feed is contacted in a reaction vessel with a dehydrocyclization catalyst comprising a large-pore zeolite containing at least one Group VIII metal to produce an aromatics product and a gaseous stream, the aromatics product is separated from the gaseous stream and is passed through a molecular sieve which adsorbs paraffins present in the aromatics product, then the gaseous stream is used to strip the paraffins from the molecular sieve, and the gaseous stream and the paraffins are recycled to the reaction vessel. Preferably, the dehydrocyclization catalyst comprises a type L zeolite containing from 8% to 15% by weight barium and from 0.6% to 1.0% by weight platinum, wherein at least 80% of the crystals of the type L zeolite are larger than 1000 Angstroms, and an inorganic binder selected from the group consisting of silica, alumina, and aluminosilicates.
REFERENCES:
patent: 2958644 (1960-11-01), Kimberlin et al.
patent: 3397137 (1968-08-01), Pickert et al.
patent: 3783123 (1974-01-01), Young
patent: 4104320 (1978-08-01), Bernard et al.
patent: 4325808 (1982-04-01), Kim et al.
La Plante, "Economics of Combining n-Paraffin Separation with Isomerization & Distillation for Various Stocks in the C.sub.5 /C.sub.6 Range", presented at NPRA annual meeting, Mar. 21-23, 1971.
Jacobson Robert L.
Jossens Lawrence W.
Chevron Research Company
Davis Curtis R.
La Paglia S. R.
McGarrigle, Jr. P. L.
Schaal E. A.
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