Process for cracking with silica-alumina

Patent · Tue Oct 14 04:00:00 EDT 1986

OSTI ID:5016556

Shyr, Y S; Johnson, M M

A process is described for cracking a hydrocarbon containing feed stream comprising the step of contacting the feed stream with a silica-alumina catalyst composition under such conditions as to produce hydrocarbon products having lower boiling ranges than the feed stream. The silica-alumina composition is prepared by a method comprising the steps of (A) mixing a first aqueous solution containing an aluminium salt and an ammonium salt of an acid having a pKa of less than 2 with a second aqueous solution containing an alkali metal silicate. The mol ratio of the alkali metal silicate to the aluminium salt is in the range of from about 2:1 to about 20:1 and the amount of the ammonium salt in the first solution is such that a coprecipitated silica-alumina hydrogel is formed after the mixing; (B) separating the coprecipitated silica-alumina hydrogel from the mixture of the two solutions; (C) calcining the hydrogel under such conditions as will result in the formation of an acidic silica-alumina.

• Assignee: Phillips Petroleum Co., Bartlesville, OK
• Patent Number(s): US 4617108
• OSTI ID: 5016556
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METAL COMPOUNDS
ALUMINIUM CHLORIDES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AQUEOUS SOLUTIONS
BOILING POINTS
CALCINATION
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CRACKING
DECOMPOSITION
DISPERSIONS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
MINERALS
MIXING
MIXTURES
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PYROLYSIS
QUANTITY RATIO
SILICA
SILICATES
SILICON COMPOUNDS
SILICON OXIDES
SOLUTIONS
SYNTHESIS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE