Method of using catalysts for reforming or isomerizing hydrocarbons

Patent · Tue Jul 22 00:00:00 EDT 1980

OSTI ID:5076034

Engelhard, P; Legendre, M; Paris, G; Szabo, G

method for the reforming of hydrocarbon fractions whose sulfur content is under 10 ppm, and whose boiling temperature under atmospheric pressure is between 35 and 250/sup 0/C, comprising the use of a catalyst, in the presence of hydrogen, wherein said carrier is formed essentially of alumina, having between 0.1 and 3% of halogen present in a form combined with at least one other catalyst component, and further comprising on said carrier: (A) from 0.02 to 2% of at least one platinum-group metal ingredient, (B) from 0.02 to 2% of a tin ingredient, (C) from 0.01 to 5% of a silicon ingredient, said percentages being based on the total catalyst weight per elemental form of each ingredient, said catalyst having been prepared by a process comprising the following steps: calcining said alumina at between 300 and 700/sup 0/C, contacting said alumina with a silicon compound of the general formula: Z/sub 1/-SI(-Z/sub 2/)(-Z/sub 3/)-Z/sub 4/ where Z/sub 1/, Z/sub 2/, Z/sub 3/, and Z/sub 4/ are each a halogen atom or a hydrocarbon radical having from one to four carbon atoms, said contacting step being followed by calcination at between 300 and 700/sup 0/C; at least one impregnation of the alumina with at least one solution containing a compound of at least one element from the group consisting of the platinum-group metals and tin; said alumina being calcined after deposition of the platinum-group metals, at a temperature of less than 600/sup 0/C and, in the case of platinum at less than 550/sup 0/C, and/or subjected to a water wash, and, after deposition of the tin when tin is deposited first, calcined at between 400 and 700/sup 0/C and/or subjected to a water wash; and after the deposition of all metals, at least one calcination at a temperature of less than 550/sup 0/C, incorporating said halogen on said carrier during preparation of the carrier or deposition of said ingredients or both.

• Assignee: to Compagnie Francaise de Raffinage, France
• Patent Number(s): US 4213849
• OSTI ID: 5076034
• Resource Relation: Patent Priority Date: Priority date 5 Apr 1976, France
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
08 HYDROGEN
02 PETROLEUM
HYDROCARBONS
CATALYTIC REFORMING
PLATINUM METALS
CATALYTIC EFFECTS
SILICON
TIN
ALUMINIUM OXIDES
CALCINATION
HYDROGEN
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
METALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
REFORMER PROCESSES
SEMIMETALS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
360301* - Composite Materials- Preparation & Fabrication- (-1987)
080103 - Hydrogen- Production- Steam Reformer Processes
020400 - Petroleum- Processing