Title:
IMPROVED METHOD FOR CONVERTING METHANOL TO ALKYL ETHER
Document Type and Number:
Japanese Patent JPS6366288
Kind Code:
A
Abstract:
A multistage process for producing ethers from lower aliphatic oxygenate feedstock, such as methanol. Feedstock is catalytically converted in a primary catalyst stage at elevated temperature in contact with zeolite catalyst to predominantly C2-C5 lower olefins comprising isobutylene and isoamylene, by-product water and a minor amount of C6+ hydrocarbons, followed by fractionation of the C2-C5 olefins to recover a C2-C3-rich recycle stream for further catalytic conversion in the primary stage. C4-C5 olefins are passed to a second catalytic etherification stage for reaction of isoalkenes with methanol to produce methyl tertiary-butyl ether and methyl isoamylether. The second stage effluent may be fractionated to recover an ether product, C5+ hydrocarbon liquid product, and unreacted butenes. Advantageously, the unreacted butenes are further reacted wtih isoparaffin in a third catalytic stage under acid catalysis alkylation conditions, and fractionated to recover C6+ alkylate liquid, liquid hydrocarbon product. The ethers may be blended with at least one C6+ hydrocarbon to produce high octane gasoline.
Inventors:
SAMIYUERU AREN TABAKU
FUREDERITSUKU JIYON KURAMUBETS
AMOSU ANDORIYUU ABUIDAN
FUREDERITSUKU JIYON KURAMUBETS
AMOSU ANDORIYUU ABUIDAN
Application Number:
JP17737087A
Publication Date:
March 24, 1988
Filing Date:
July 17, 1987
Export Citation:
Assignee:
MOBIL OIL CORP
International Classes:
C07C1/00; C07C1/20; C07C9/16; C07C41/06; C07C67/00; C10G3/00; C10L1/02; (IPC1-7): B01J29/28; C07C1/20; C10G3/00
Attorney, Agent or Firm:
Soga Doteru