Claims
- 1. A process for the dehydrocyclization of C.sub.6 -C.sub.8 hydrocarbons to aromatics comprising contacting the C.sub.6 -C.sub.8 hydrocarbons in a reaction zone at dehydrocyclization conditions with a catalyst comprising a platinum component, a non-acidic potassium form L-zeolite and an amorphous silica binder, where the catalyst is prepared by the steps of:
- (a) commingling the non-acidic potassium form L-zeolite with an amorphous silica powder;
- (b) adding an aqueous solution of potassium hydroxide to the L-zeolite and silica powder and mixing to form an extrudable dough;
- (c) extruding the dough to form extrudates that are non-acidic as a result of the incorporated potassium hydroxide;
- (d) calcining the extrudates at temperatures exceeding 260.degree. C. without prior washing or low-temperature drying of the extrudates or without subjecting the extrudates to any treatment that would neutralize or reduce the basicity of the extrudates or would result in a loss of potassium cations;
- (e) contacting the calcined extrudate with a solution comprising a platinum component and a potassium component; and,
- (f) subjecting the resultant extrudate of step (e) to an oxidation treatment and subsequently to a reduction treatment.
- 2. The process of claim 1 further characterized in that the C.sub.6 -C.sub.8 hydrocarbons are substantially paraffinic.
- 3. The process of claim 1 further characterized in that the dehydrocyclization conditions comprise a temperature of from about 350.degree. to about 650.degree. C., a reaction pressure of from about 101 to about 4137 kPa (ga), a liquid hourly space velocity of from 0.1 to about 10 hr.sup.-1, and a hydrogen to C.sub.6 -C.sub.8 hydrocarbon feed mole ratio from about 0.2 to about 10.
Parent Case Info
Divisional application of prior copending application Ser. No. 063,878, filed June 19, 1987, now U.S. Pat. No. 4,822,762.
US Referenced Citations (3)
Divisions (1)
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Number |
Date |
Country |
Parent |
63878 |
Jun 1987 |
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