Aromatics production

Patent · Tue Aug 11 04:00:00 EDT 1987

OSTI ID:6069218

Chu, Y F; Chester, A W

A multistage process is described for converting lower aliphatic oxygenated hydrocarbon feedstock to hydrocarbon product rich in benzene, toluene and/or xylene which comprises: contacting the oxygenated hydrocarbons in a primary state with a medium pore shape selective acidic zeolite to an intermediate hydrocarbon product comprising predominantly aliphatic hydrocarbons; contacting at least a portion of the aliphatic hydrocarbons from the primary stage with a secondary stage catalyst comprising gallium-promoted medium pore shape selective zeolite characterized by a constraint index within the approximate range of 1 to 12 and a silica to alumina ratio of about 20 to 100:1, thereby producing benzene, toluene, xylene and C/sub 9//sup +/ aromatic hydrocarbons; fractionating to recover a C/sub 9//sup +/ aromatic-rich stream; and recycling the C/sub 9//sup +/ aromatic stream to the secondary stage for further reaction in contact with the metal-promoted catalyst.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4686312
• OSTI ID: 6069218
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKYLATED AROMATICS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
BENZENE
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FRACTIONATION
FUELS
GALLIUM
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
METALS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PETROLEUM
PROCESSING
QUANTITY RATIO
RECYCLING
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TOLUENE
ZEOLITES