Patent US4511747A successfully refreshed from Google Patents.
US4511747A
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Light olefin conversion to heavier hydrocarbons with sorption recovery of unreacted olefin vapor
Assignee: Mobil Oil AS
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Filing: 1984-02-01
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Granted: 1985-04-16
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Expires: 2004-02-01
Abstract
Abstract In the conversion of light olefins to heavier hydrocarbons, an improved recovery technique is provided for selectively removing unreacted light olefins from a catalytic reactor effluent. This system is useful in converting ethene-rich feedstocks to gasoline and/or distillate products, particularly in oligomerization processes employing shape selective siliceous catalysts such as ZSM-5 type zeolites. By recycling gasoline-range hydrocarbons as a sorbent liquid, unreacted C2+ components may be absorbed from reactor effluent vapor and returned for further contact with the catalyst.
Inventors
- 👤 Bernard S. Wright
- 👤 Chung H. Hsia
- 👤 Hartley Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:30
CPC Classifications
C; C10; C10G; C10G50/00; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/12; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
A continuous process for converting ethene-rich olefinic feedstock to heavier liquid hydrocarbons comprising the steps of combining the feedstock stream with a liquid hydrocarbon stream containing a major amount of gasoline range hydrocarbons including C 5 + olefins; contacting the combined feedstock-gasoline stream at elevated temperature and pressure in a reaction zone with the shape selective medium pore zeolite oligomerization catalyst to convert at least a portion of the olefinic components to heavier hydrocarbons; cooling oligomerization reaction effluent to condense at least a portion of said heavier hydrocarbons; separating the cooled and partially condensed effluent stream into an ethene-rich vapor stream and condensed liquid hydrocarbon stream; fractionating said condensed hydrocarbons to provide a gasoline stream, a distillate product stream and a light hydrocarbon vapor stream containing unreacted ethene; contacting the ethene-rich vapor from the separation step and the light hydrocarbon vapor stream under sorption pressure conditions with a cooled liquid portion of the gasoline hydrocarbon to sorb ethene into the liquid gasoline stream; and pressurizing and recycling the sorbed ethene and gasoline stream for combining with an ethene-rich feedstock.
Claim 2
Dependent Claim
179 words
A continuous process for converting ethene-rich olefinic feedstock to heavier liquid hydrocarbons comprising the steps of combining the feedstock stream with a liquid hydrocarbon stream containing a major amount of gasoline range hydrocarbons including C 5 + olefins; contacting the combined feedstock-gasoline stream at elevated temperature and pressure in a reaction zone with the shape selective medium pore zeolite oligomerization catalyst to convert at least a portion of the olefinic components to heavier hydrocarbons; cooling oligomerization reaction effluent to condense at least a portion of said heavier hydrocarbons; separating the cooled and partially condensed effluent stream into an ethene-rich vapor stream and condensed liquid hydrocarbon stream; fractionating said condensed hydrocarbons to provide a gasoline stream, a distillate product stream and a light hydrocarbon vapor stream containing unreacted ethene; contacting the ethene-rich vapor from the separation step and the light hydrocarbon vapor stream under sorption pressure conditions with a cooled liquid portion of the gasoline hydrocarbon to sorb ethene into the liquid gasoline stream; and pressurizing and recycling the sorbed ethene and gasoline stream for combining with an ethene-rich feedstock.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein gasoline is recycled at a molar ratio of gasoline to fresh feedstock olefin of at least 2:1.
Claim 4
Dependent Claim
14 words
The process of claim 1 wherein the reaction zone contains acid ZSM-5 type catalyst.
Claim 5
Dependent Claim
53 words
The process of claims 1, 2 or 3 wherein the combined feedstock gasoline stream is heated to a temperature of about 260° C. to 370° C. and contacted with the oligomerization catalyst at a pressure of about 5000 to 7000 kPa with a minimum olefin partial pressure at reactor inlet of 1200 kPa.
Claim 6
Dependent Claim
23 words
The process of claim 3 wherein the feedstock space velocity is about 0.5 LHSV, based on total olefins contacted with the oligomerization catalyst.
Claim 7
Dependent Claim
173 words
A continuous process for converting light olefinic feedstock comprising C 2 + monolefinic by hydrocarbons to heavier hydrocarbons comprising the steps of combining said feedstock with a liquid hydrocarbon diluent stream containing a fraction of heavier hydrocarbons including C 5 + olefins; contacting the combined feedstock-diluent stream at elevated temperature and pressure in a reaction zone with the shape selective medium pore zeolite oligomerization catalyst to convert at least a portion of the olefinic components to heavier hydrocarbons; cooling oligomerization reaction effluent to condense at least a portion of said heavier hydrocarbons; separating the cooled and partially condensed effluent strem into a vapor stream comprising unreacted light olefin and condensed liquid hydrocarbon stream; fractionating said condensed liquid hydrocarbons to provide a recycle sorbent stream and at least one product hydrocarbon stream; contacting the vapor stream from the separation step and under sorption pressure conditions with cooled recycle sorbent to sorb said unreacted light olefin into the sorbent stream; and recycling the sorbent stream rich in olefin for further conversion with said olefinic feedstock.
Claim 8
Dependent Claim
173 words
A continuous process for converting light olefinic feedstock comprising C 2 + monolefinic by hydrocarbons to heavier hydrocarbons comprising the steps of combining said feedstock with a liquid hydrocarbon diluent stream containing a fraction of heavier hydrocarbons including C 5 + olefins; contacting the combined feedstock-diluent stream at elevated temperature and pressure in a reaction zone with the shape selective medium pore zeolite oligomerization catalyst to convert at least a portion of the olefinic components to heavier hydrocarbons; cooling oligomerization reaction effluent to condense at least a portion of said heavier hydrocarbons; separating the cooled and partially condensed effluent strem into a vapor stream comprising unreacted light olefin and condensed liquid hydrocarbon stream; fractionating said condensed liquid hydrocarbons to provide a recycle sorbent stream and at least one product hydrocarbon stream; contacting the vapor stream from the separation step and under sorption pressure conditions with cooled recycle sorbent to sorb said unreacted light olefin into the sorbent stream; and recycling the sorbent stream rich in olefin for further conversion with said olefinic feedstock.
Claim 9
Dependent Claim
55 words
The process of claim 6 wherein the combined feedstock gasoline stream is heated to a temperature of about 260° C. to 370° C. and contacted with the oligomerization catalyst comprising said ZSM-5 type zeolite at a pressure of about 5000 to 7000 kPa with a minimum olefin partial pressure at reactor inlet of 1200 kPa.
Claim 10
Dependent Claim
166 words
A continuous process for converting light olefinic feedstock comprising at least one monolefinic hydrocarbon to heavier hydrocarbons comprising the steps of combining said feedstock with a liquid hydrocarbon diluent stream containing heavier liquid hydrocarbons; contacting the combined feedstock-diluent stream at elevated temperature and pressure in a reaction zone with the shape selective medium pore zeolite oligomerization catalyst to convert at least a portion of the olefinic components to heavier hydrocarbons; cooling oligomerization reaction effluent to condense at least a portion of said heavier hydrocarbons; separating the cooled and partially condensed effluent stream into vapor stream and comprising unreacted light olefin and condensed liquid hydrocarbon stream; fractionating said condensed liquid hydrocarbons to provide a recycle sorbent stream and at least one product hydrocarbon stream; contacting the vapor stream from the separation step and under sorption pressure conditions with a cooled recycle sorbent to sorb said unreacted light olefin into the sorbent stream; and recycling the sorbent stream rich in olefin for further conversion with said olefinic feedstock.
Claim 11
Dependent Claim
166 words
A continuous process for converting light olefinic feedstock comprising at least one monolefinic hydrocarbon to heavier hydrocarbons comprising the steps of combining said feedstock with a liquid hydrocarbon diluent stream containing heavier liquid hydrocarbons; contacting the combined feedstock-diluent stream at elevated temperature and pressure in a reaction zone with the shape selective medium pore zeolite oligomerization catalyst to convert at least a portion of the olefinic components to heavier hydrocarbons; cooling oligomerization reaction effluent to condense at least a portion of said heavier hydrocarbons; separating the cooled and partially condensed effluent stream into vapor stream and comprising unreacted light olefin and condensed liquid hydrocarbon stream; fractionating said condensed liquid hydrocarbons to provide a recycle sorbent stream and at least one product hydrocarbon stream; contacting the vapor stream from the separation step and under sorption pressure conditions with a cooled recycle sorbent to sorb said unreacted light olefin into the sorbent stream; and recycling the sorbent stream rich in olefin for further conversion with said olefinic feedstock.
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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |