Hydroconversion of heavier n-paraffins with Pt/ZrO sub 2 /SO sub 4 sup 2 minus

Conference · Wed Aug 01 00:00:00 EDT 1990 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States)

OSTI ID:7037376

Wen, M Y; Kundurmutt, J; Tierney, J W; Wender, I ^[1]

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1. Univ. of Pittsburgh, PA (United States)

The development of effective solid acid catalysts has gained great interest in the refining and petrochemical industries for the last two decades, mainly due to the advantages of less corrosivity, fewer environmental problems, and easy separation from reaction mixtures of these solid acids. Recently, Pt/ZrO{sub 2}/SO{sub 4}{sup 2{minus}}, a solid superacid, was reported to be active for the hydroisomerization of n-pentane and desulfurized light naphtha at low temperatures. In a previous study, the same catalyst was also found effective for hydroisomerization and hydrocracking of n-heptane and n-hexadecane under mild reaction conditions, i.e., 130-170 C and 300 psig hydrogen pressure. Results indicated that the conversion to isobutane and n-butane was greater than expected, with more than 90% selectivity to isobutane. In addition, the multibranched-to-monobranched ratio of isohexadecanes was found to be greater than two. The preparation of a zirconium superacid from zirconium salts containing noncomplexing species, such as Cl{sup {minus}} and NO{sub 3}{sup {minus}}, has been established. However, the preparation of a similar catalyst from a zirconium salt containing SO{sub 4}{sup 2{minus}} has not been reported. The Pt/ZrO{sub 2}/SO{sub 4}{sup 2{minus}} showed high activity for hydroconversion of long chain n-paraffins; even the zirconium sulfate oxide heated to 650 C showed activity. In addition, catalyst activity was enhanced by further treatment with 1N-H{sub 2}SO{sub 4}. Isomerization of high molecular weight n-paraffins (waxes) for the production of premium engine oil (VI > 145) has been a constant interest in refining industries. Use of a solid superacid, such as Pt/ZrO{sub 2}SO{sub 4}{sup 2{minus}}, with hydride donor solvents may provide a new route for possible cheaper premium lubricant oils from waxes.

• OSTI ID: 7037376
• Report Number(s): CONF-900802-; CODEN: ACPCA
• Journal Information: American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States), Vol. 35:4; Conference: 200. American Chemical Society (ACS) national meeting, Washington, DC (United States), 26-31 Aug 1990; ISSN 0569-3799
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
ALKENES
ISOMERIZATION
PLATINUM
CATALYTIC EFFECTS
WAXES
ZIRCONIUM OXIDES
ZIRCONIUM SULFATES
CATALYSTS
CHEMICAL PREPARATION
HYDROGENATION
LUBRICATING OILS
MEDIUM PRESSURE
PENTANE
PETROLEUM
SYNTHESIS
TEMPERATURE RANGE 0400-1000 K
ALKANES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
LUBRICANTS
METALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PLATINUM METALS
SULFATES
SULFUR COMPOUNDS
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
400201* - Chemical & Physicochemical Properties
020500 - Petroleum- Products & By-Products