US5120881A
Expired / Lapsed
US
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Removal of nitrogenous components of a hydrocarbon feedstream
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1990-03-30
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Granted: 1992-06-09
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Expires: 2010-03-30
Abstract
Abstract A catalytic reaction process which involves exposing a hydrocarbon feed including nitrogenous contaminants as well as dialkyl sulfides to a material capable of adsorbing the nitrogenous contaminants as well as dialkyl sulfides from the feed before introducing the stream substantially devoid of nitrogenous contaminants and dimethyl sulfide into a feed zone of a reactor; contacting the hydrocarbon stream with a catalyst material in the reaction zone; and catalytically reacting the hydrocarbon stream under conditions which favor forming a reaction product and inhibiting reaction of nitrogenous contaminants and dimethyl sulfide with the catalyst material.
Inventors
- 👤 Daniel D. Rosenfeld
- 👤 John D. Y. Ou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:13
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/34; C07C41/40; C07C41/42; C07C41/05; C07C41/06; C07B; C07B63/00; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
A method of producing an ether and treating a stream comprising nitrogen-containing substances, said process comprising: a) passing a stream comprising hydrocarbons and nitrogen-containing substances over a zeolite selected from the group consisting of zeolite X, zeolite Y, zeolite L, zeolite Beta, and Mordenite under conditions effective to permit said zeolite to adsorb said nitrogen-containing substances to result in a substantially purified stream comprising hydrocarbons which is substantially devoid of said nitrogen-containing substances, prior to b) supplying a feedstream comprising said substantially purified stream comprising hydrocarbons, olefins and alcohols to a reactor, and c) reacting said feedstream in the presence of an acid cation exchange resin catalyst under conditions which favor ether formation.
Claim 2
Independent Claim
113 words
A method of producing an ether and treating a stream comprising nitrogen-containing substances, said process comprising: a) passing a stream comprising hydrocarbons and nitrogen-containing substances over a zeolite selected from the group consisting of zeolite X, zeolite Y, zeolite L, zeolite Beta, and Mordenite under conditions effective to permit said zeolite to adsorb said nitrogen-containing substances to result in a substantially purified stream comprising hydrocarbons which is substantially devoid of said nitrogen-containing substances, prior to b) supplying a feedstream comprising said substantially purified stream comprising hydrocarbons, olefins and alcohols to a reactor, and c) reacting said feedstream in the presence of an acid cation exchange resin catalyst under conditions which favor ether formation.
Claim 3
Dependent Claim
38 words
The method as defined by claim 1, wherein said nitrogen-containing materials are selected from the group consisting of a nitrile, an amine, an amide, and ammonia and mixtures of two or more of nitriles, amines, amides, and ammonia.
Claim 4
Independent Claim
14 words
The method as defined by claims 2, wherein said nitrogen-containing materials is a nitrile.
Claim 5
Dependent Claim
13 words
The method as defined by claim 3, wherein said nitrile is an acetonitrile.
Claim 6
Dependent Claim
22 words
The method as defined by claim 2, wherein less than about 2000 ppm of said nitrogen-containing materials are present in said stream.
Claim 7
Dependent Claim
22 words
The method as defined by claim 5, wherein less than about 300 ppm of said nitrogen-containing materials are present in said stream.
Claim 8
Dependent Claim
30 words
The method as defined by claim 6, wherein said nitrogen-containing materials are present in said stream in an amount within the range of about 5 ppm to about 50 ppm.
Claim 9
Dependent Claim
14 words
The method as defined by claim 2, wherein said stream further comprises dialkyl sulfides.
Claim 10
Dependent Claim
30 words
The method as defined by claim 8, wherein said dialkyl sulfides are initially present in said hydrocarbon stream in an amount within the range of up to about 200 ppm.
Claim 11
Dependent Claim
28 words
The method as defined by claim 9, wherein said nitrogen-containing substances and said dialkyl-sulfides are present in a ratio within the range of about 1:1 to about 20:1.
Claim 12
Dependent Claim
14 words
The method as defined by claim 8, wherein said zeolite is a zeolite X.
Claim 13
Dependent Claim
15 words
The method as defined by claim 11, wherein said zeolite X is a sodium-X zeolite.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |