Conversion of methanol to olefins in a tubular reactor with light olefin co-feeding

Patent · Tue May 20 04:00:00 EDT 1986

OSTI ID:5470103

Sapre, A V

A process is described of converting a feed comprising at least one lower aliphatic alcohol having from 1 to 3 carbon atoms and/or corresponding ethers of such alcohols, alone or in admixture with water, into a predominantly olefinic hydrocarbon product comprising at least 50 wt. % olefins. The feed is contacted with a dehydration catalyst at elevated temperatures in a first reaction zone comprising a dehydration reactor to obtain a product comprising a mixture of water and at least one ether, and the product from the first reaction zone is thereafter contacted with a crystalline silicate zeolite in a second reaction zone at elevated temperatures and under exothermic reaction conditions to obtain the hydrocarbon products comprising olefins. The zeolite is a zeolite having a silica-to-alumina ratio of at least about 12, and a Constraint Index of about 1 to 12, and the second reaction zone comprising a tubular reactor wherein the crystalline silicate zeolite is confined within a plurality of adjacent elongated tubular reaction zones, the improvement comprising cofeeding with the feed about 0.5-3 % by weight of the feed a light olefin to the dehydration reactor to stabilize the conversion operation.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4590320
• OSTI ID: 5470103
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALCOHOLS
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTORS
DEHYDRATION
ELEMENTS
ETHERS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
METHANOL
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
QUANTITY RATIO
SILICA
SILICATES
SILICON COMPOUNDS
SILICON OXIDES
SYNTHESIS
TEMPERATURE EFFECTS
WATER
ZEOLITES