Patent US4933283A successfully refreshed from Google Patents.
US4933283A
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Process for converting cellulosic materials to hydrocarbon products
Assignee: Mobil Oil AS
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Filing: 1987-11-12
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Granted: 1990-06-12
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Expires: 2007-11-12
Abstract
Abstract Cellulosic materials are converted to hydrocarbons by hydrolyzing cellulosic materials to produce a mixture of fermentable sugars and unfermentable furfural, fermenting the mixture to obtain a fermented mixture containing fermented product and unfermented furfural and contacting the fermented mixture with a highly siliceous crystalline zeolite catalyst under conditions of temperature and pressure to convert the fermented mixture to a hydrocarbon-containing product. Preferably, an oxygenated organic compound such as methanol, ethanol or dimethylether is mixed with the fermented mixture prior to contact with the catalyst.
Inventors
- 👤 Nai Y. Chen
- 👤 Leonard R. Koenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:29
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/22; C07; C07C; C07C1/00; C07C1/20; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/65; C07C2529/70; Y; Y02; Y02E; Y02E50/00; Y02E50/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
137 words
A process for converting cellulosic materials to hydrocarbons which comprises (a), (b), (c), and (d) wherein (a) comprises hydrolyzing said cellulosic materials to form a mixture which comprises fermentable sugars and unfermentable furfural; wherein (b) comprises exposing said mixture to fermentation conditions to effect fermentation of said fermentable sugars and to produce a mixture containing a fermentation product admixed with said unfermentable furfural; wherein (c) comprises combining said fermentation product admixed with unfermentable furfural with methanol prior to (d); and wherein (d) comprises thereafter contacting the resulting mixture which contains fermentation product, unfermentable furfural and methanol and a highly siliceous crystalline zeolite catalyst having a silica to alumina mole ratio of at least 70 and a Constraint Index of 1 to 12 under conditions of temperature and pressure sufficient to convert said mixture to a hydrocarbon-containing product.
Claim 2
Dependent Claim
137 words
A process for converting cellulosic materials to hydrocarbons which comprises (a), (b), (c), and (d) wherein (a) comprises hydrolyzing said cellulosic materials to form a mixture which comprises fermentable sugars and unfermentable furfural; wherein (b) comprises exposing said mixture to fermentation conditions to effect fermentation of said fermentable sugars and to produce a mixture containing a fermentation product admixed with said unfermentable furfural; wherein (c) comprises combining said fermentation product admixed with unfermentable furfural with methanol prior to (d); and wherein (d) comprises thereafter contacting the resulting mixture which contains fermentation product, unfermentable furfural and methanol and a highly siliceous crystalline zeolite catalyst having a silica to alumina mole ratio of at least 70 and a Constraint Index of 1 to 12 under conditions of temperature and pressure sufficient to convert said mixture to a hydrocarbon-containing product.
Claim 3
Dependent Claim
17 words
A process of claim 1 wherein said contacting with said catalyst occurs in a fluidized bed reactor.
Claim 4
Dependent Claim
17 words
A process of claim 1 wherein said contacting with said catalyst occurs in a moving bed reactor.
Claim 5
Dependent Claim
26 words
A process of claim 1 wherein said highly siliceous crystalline zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
Claim 6
Dependent Claim
43 words
A process of claim 1 wherein said contacting with said catalyst is carried out at temperatures ranging from about 300° to 800° C., pressures ranging from about 1 to 100 Atm., and a weight hourly space velocity ranging from about 0.1 to 100.
Claim 7
Dependent Claim
12 words
A process of claim 1 wherein said catalyst is periodically oxidatively regenerated.
Claim 8
Dependent Claim
17 words
A process of claim 1 wherein said catalyst is periodically oxidatively regenerated every 1 to 30 minutes.
Claim 9
Dependent Claim
15 words
A process of claim 1 wherein said catalyst is periodically oxidatively regenerated every 10 minutes
Claim 10
Dependent Claim
23 words
A process of claim 1 wherein water is removed from the mixture resulting from fermentation prior to contacting said mixture with said catalyst.
Claim 11
Dependent Claim
12 words
A process of claim 1 wherein said hydrocarbon-containing product contains carbon monoxide.
Claim 12
Dependent Claim
13 words
A process of claim 1 wherein said highly siliceous crystalline zeolite is ZSM-5.
Claim 13
Dependent Claim
42 words
A process of claim 1 wherein said contacting with said catalyst is carried out at temperatures ranging from about 400° to 650° C., pressures ranging from about 1 to 20 Atm., and weight hourly space velocity ranging from about 0.9 to 5.
Claim 14
Dependent Claim
34 words
A process of claim 1 wherein said contacting with said catalyst is carried out a temperature of about 550° C., pressure of about 1 Atm., and a weight hourly space velocity of about 1.
Claim 15
Dependent Claim
42 words
A process of claim 11, wherein said contacting with said catalyst is carried out a temperatures ranging from about 400° to 650° C., pressures ranging from about 1 to 20 Atm., and weight hourly space velocity ranging from about 0.9 to 5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |