Two stage process for improving the catalyst life of zeolites in the synthesis of lower olefins from alcohols and their ether derivatives

Patent · Tue Jan 20 04:00:00 EST 1987

OSTI ID:6808605

Pieters, W J.M.; Okumura, Y

A process is described for converting an alcohol and/or ether feed as hereinafter defined to a hydrocarbon mixture rich in olefins which comprises contacting, under conversion conditions at a conversion reaction temperature of from about 300/sup 0/ to 350/sup 0/C., a feed comprising one or more monohydric alcohols having from about 1 to about 4 carbon atoms, ethers derived therefrom, or mixtures of the alcohols and ethers, with a modified crystalline metalosilicate shape selective acidic zeolite. The metalosilicate is selected from the group consisting of aluminum, gallium, and mixtures thereof, and the zeolite, prior to modification and in the absence of any coke deposited thereon, possesses: (a) the capability of catalyzing the alcohol and/or other conversion reaction; (b) a channel size and structure such as to permit (i) entry of the feed into the zeolite and diffusion to the active acid sites within the zeolite, and (ii) formation of olefin products within the zeolite and diffusion of the products out of the zeolite; and (c) hydrothermal stability at temperatures of at least about 290/sup 0/C. The modification of the zeolite is conducted in a manner sufficient to increase the catalyst life of the zeolite, relative to the absence of the modification when the zeolite is employed as a catalyst for the alcohol and/or ether conversion reaction.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ
• Patent Number(s): US 4638106
• OSTI ID: 6808605
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
CARBON
CATALYTIC EFFECTS
CHEMICAL PREPARATION
COKE
DIFFUSION
DISPERSIONS
ELEMENTS
ETHERS
GALLIUM COMPOUNDS
HEATING
HIGH TEMPERATURE
HYDROCARBONS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
QUANTITY RATIO
SERVICE LIFE
SILICATES
SILICON COMPOUNDS
STABILITY
SYNTHESIS
TEMPERATURE EFFECTS
ZEOLITES