Patent US3902870A successfully refreshed from Google Patents.
US3902870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of gasoline
Assignee: Mobil Oil AS
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Filing: 1974-05-30
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Granted: 1975-09-02
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Expires: 1994-05-30
Abstract
Abstract Reduction of bromine number of cracked gasolines by etherifying the iso-olefin content thereof with excess methanol followed by the addition of a small amount of water to extract the excess methanol remaining after the etherification. The water-methanol phase can be conventionally resolved and the fractions thereof recycled.
Inventors
- 👤 Louis D Rollmann
- 👤 John C Zahner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:15
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/02; C10L1/023; C07; C07C; C07C41/00; C07C41/01; C07C41/16; C07C41/34; C07C41/38; C10G; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
IN THE PROCESS OF IMPROVING THE QUALITY OF AN OLEFINIC GASOLINE BOILING RANGE FRACTION CONTAINING, C5+, GASOLINE BOILING RANGE, TERTIARY OLEFIN AND HAVING A BROMINE NUMBER OF AT LEAST ABOUT 40 BY CONTACTING SUCH WITH A STOCICHIOMETRIC EXCESS OF METHANOL, BASED ON TERTIARY OLEFIN, AT ABOUT 100* TO 300*F IN THE EFFECTIVE PRESENE OF AN ACID ETHERIFICATION CATALYST TO PRODUCE A PRODUCT, HAVING A BROMINE NUMBER AT LEAST 10% LOWER THAN THE BROMINE NUMBER OF THE OLEFINIC GASOLINE FEED, COMPRISING GASOLINE BOILING RANGE HYDROCARBONS, ETHERS AND FREE METHANOL, THE IMPROVEMENT, WHEREBY REMOVING SAID METHANOL FROM SAID PRODUCT, WHICH COMPRISES ADMIXING AID PRODUCT WITH ABOUT 2 TO 15% WATER, PARTITIONING SAID METHANOL INTO A WATER PHASE AND SAIDETHER INTO AN OIL PHASE, AND SEPARATING SAID WATER AND OIL PHASE.
Claim 2
Dependent Claim
128 words
IN THE PROCESS OF IMPROVING THE QUALITY OF AN OLEFINIC GASOLINE BOILING RANGE FRACTION CONTAINING, C5+, GASOLINE BOILING RANGE, TERTIARY OLEFIN AND HAVING A BROMINE NUMBER OF AT LEAST ABOUT 40 BY CONTACTING SUCH WITH A STOCICHIOMETRIC EXCESS OF METHANOL, BASED ON TERTIARY OLEFIN, AT ABOUT 100* TO 300*F IN THE EFFECTIVE PRESENE OF AN ACID ETHERIFICATION CATALYST TO PRODUCE A PRODUCT, HAVING A BROMINE NUMBER AT LEAST 10% LOWER THAN THE BROMINE NUMBER OF THE OLEFINIC GASOLINE FEED, COMPRISING GASOLINE BOILING RANGE HYDROCARBONS, ETHERS AND FREE METHANOL, THE IMPROVEMENT, WHEREBY REMOVING SAID METHANOL FROM SAID PRODUCT, WHICH COMPRISES ADMIXING AID PRODUCT WITH ABOUT 2 TO 15% WATER, PARTITIONING SAID METHANOL INTO A WATER PHASE AND SAIDETHER INTO AN OIL PHASE, AND SEPARATING SAID WATER AND OIL PHASE.
Claim 3
Dependent Claim
18 words
The improved process claimed in claim 1 wherein the etherification is carried out at about 150* to 220*F.
Claim 4
Dependent Claim
22 words
The improved process claimed in claim 1 wherein said stoichiometric excess of alcohol is up to about 500%, based on tertiary olefin.
Claim 5
Dependent Claim
20 words
The improved process claimed in claim 1 wherein said gasoline comprises pyrolysis gasoline, coker gasoline, cracked gasoline or mixtures thereof.
References Cited (Backward Citations)
US3846088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |