Method for converting oxygenates to olefins
AssigneeExxonMobil Chemical Patents Inc.
InventorsJames R. Lattner, Stephen N. Vaughn, Keith H. Kuechler, David C. Skouby, Hsiang-Ning Sun
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Abstract
The present invention provides a method for converting a feed containing oxygenates to olefins and comprises the following steps: providing a feed including an oxygenate; contacting the feed in a reactor apparatus with a catalyst including a molecular sieve, the contacting taking place under conditions effective to convert the oxygenate to a product including a light olefin, the conditions including a gas superficial velocity of at least two meters per second at least one point in the reaction zone; and recirculating a first portion of the catalyst to recontact the feed.
Claims70
A method for converting a feed including an oxygenate to a product including a light olefin, said method comprising:
- providing a feed including an oxygenate;
- contacting said feed in a reaction zone of a reactor apparatus with a catalyst including a molecular sieve, said contacting taking place under conditions effective to convert said oxygenate to a product including a light olefin, said conditions including a gas superficial velocity of at least two meters per second at at least one point in said reaction zone;
- and
- recirculating a first portion of said catalyst to recontact said feed.
A method for converting feed containing an oxygenate to a light olefin, said method comprising:
- (a) providing a reactor apparatus having an inlet zone, a reaction zone and a disengaging zone, said reaction zone being positioned between said inlet zone and said disengaging zone;
- (b) providing a feed including an oxygenate to said inlet zone;
- (c) contacting said feed in said reaction zone with a catalyst including a molecular sieve, said contacting taking place under conditions effective to convert said oxygenate to a product including a light olefin, said conditions including a gas superficial velocity off at least two meters per second at at least one point in said reaction zone;
- (d) separating said product from said catalyst in said disengaging zone;
- (e) recirculating a first portion of said catalyst from said disengaging zone to said inlet zone;
- and
- (f) repeating steps (b) to (e).
A method for converting a feed including an oxygenate to a product including a light olefin, said method comprising:
- providing a feed including an oxygenate;
- and
- contacting said feed in a reaction zone of a reactor apparatus with a catalyst including a non-zeolitic molecular sieve, said contacting taking place under conditions effective to convert said oxygenate to a product including a light olefin, said conditions including a gas superficial velocity of at least one meter per second at at least one point in said reaction zone.
The method of claim 49 wherein said gas superficial velocity is at least two meters per second at at least one point in said reaction zone.
Dependencies are inferred from the claim text.