Feedstock preparation and conversion of oxygenates to olefins

Patent · Tue Oct 11 00:00:00 EDT 1988

OSTI ID:6632379

Harandi, M N; Owen, H; Smyth, S C

This patent describes a continuous process for converting crude methanol to olefinic hydrocarbons in a catalytic reaction zone with a crystalline acid zeolite catalyst at elevated temperature comprising the steps of: (a) contacting a crude methanol feedstock containing a minor amount of water with a liquid hydrocarbon extraction stream rich in propane and lighter hydrocarbons under extraction conditions favorable to selective extraction of the methanol, thereby providing an extract liquid stream rich in methanol and an aqueous raffinate stream lean in methanol; (b) charging the extracted methanol substantially free of water to the catalytic reaction zone under process conditions for converting methanol to predominantly C/sub 2/-C/sub 5/ olefinic hydrocarbons; (c) cooling reaction effluent to recover aqueous liquid byproduct, gas rich in C/sub 3//sup -/ hydrocarbons, and product comprising C/sub 4//sup +/ hydrocarbons; and (d) condensing and recycling at least a portion of the C/sub 3-/ liquid phase to step (a) for use as propane-rich extraction liquid.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4777321
• OSTI ID: 6632379
• Resource Relation: Patent File Date: Filed date 29 Apr 1987
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
ALKENES
PRODUCTION
METHANOL
CATALYSIS
ZEOLITES
CHEMICAL COMPOSITION
ACIDIFICATION
CATALYSTS
CHEMICAL PREPARATION
EVAPORATION
EXTRACTION
HYDROCARBONS
ORGANIC OXYGEN COMPOUNDS
PROPANE
ALCOHOLS
ALKANES
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
PHASE TRANSFORMATIONS
SEPARATION PROCESSES
SYNTHESIS
020400* - Petroleum- Processing