EP0590883A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Benzene removal from hydrocarbon streams
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1993-09-23
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Granted: —
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Expires: 2013-09-23
Abstract
Abstract A method for the separation of benzene from a hydrocarbon stream, such as a gasoline boiling range stream, which comprises contacting the hydrocarbon stream with an adsorbent capable of selectively adsorbing the benzene from the stream, hydrogenating the adsorbed benzene to cyclohexane, and desorbing the cyclohexane from the adsorbent. The hydrogenation of the benzene to cyclohexane facilitates the removal of the benzene from the adsorbent.
Inventors
- 👤 Richard James Bellows
- 👤 Gary Brice Mcvicker
- 👤 Joseph Ernest Baumgartner
- 👤 James Patrick Dennis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 11:45
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
25 words
A method of substantially removing adsorbed benzene from an adsorbent which comprises converting the adsorbed benzene to cyclohexane, and desorbing the cyclohexane from the adsorbent.
Claim 2
Dependent Claim
15 words
The method of claim 1 wherein the benzene is converted to cyclohexane by catalytic hydrogenation.
Claim 3
Dependent Claim
35 words
The method of claim 1 or 2, wherein the cyclohexane is desorbed using a hydrocarbon desorbent, which desorbent is preferably is an aromatic compound selected from benzene, toluene, xylene, ethyl benzene or a mixture thereof.
Claim 4
Independent Claim
52 words
A method for the substantial separation of benzene from a feed mixture comprising benzene and at least one other hydrocarbon, which method comprises contacting the feed mixture with an adsorbent capable of selectively adsorbing benzene from the feed mixture, converting the adsorbed benzene to cyclohexane, and desorbing the cyclohexane from the adsorbent.
Claim 5
Dependent Claim
36 words
The method of claim 4 wherein the adsorbent is a zeolite, preferably is a cationic exchanged L, X, Y, or mordenite zeolite, the cation being selected from alkali metals, alkaline earth metals and rare earth metals.
Claim 6
Dependent Claim
43 words
The method of claim 4 or 5 wherein the benzene is converted to cyclohexane by hydrogenation in the presence of a hydrogen activation catalyst, the catalyst being supported by the adsorbent either as the sole support material or admixed with another support material.
Claim 7
Dependent Claim
13 words
The method of claim 6 wherein the hydrogen activation catalyst is supported platinum.
Claim 8
Independent Claim
26 words
The method of any of claims 4 to 7 wherein the benzene adsorption, conversion to cyclohexane, and cyclohexane desorption are conducted in the same reactor vessel.
Claim 9
Independent Claim
16 words
The method of any of claims 4 to 8 wherein the desorbent is the feed mixture.
Claim 10
Dependent Claim
74 words
A continuous process for the substantial separation of benzene from a feed mixture comprising benzene and at least one other hydrocarbon, which process comprises: (i) contacting the feed mixture with an adsorbent capable of selectively adsorbing benzene from the feed mixture; (ii) converting the adsorbed benzene to cyclohexane; and (iii) desorbing the cyclohexane from the adsorbent using as desorbent the feed mixture, the benzene in the feed mixture displacing the cyclohexane from the adsorbent.
References Cited (Backward Citations)
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