US4418219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of methyl tertiary-butyl ether
Assignee: Microsoft Corp
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Filing: 1982-03-22
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Granted: 1983-11-29
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Expires: 2002-03-22
Abstract
Abstract Methyl tertiary-butyl ether (MTBE), a high-octane blending agent for motor fuels, is prepared in high yield by the process which comprises reacting isobutylene and methanol in the presence of a catalytically effective amount of at least one heterogeneous catalyst selected from the group consisting of boron phosphate, blue tungsten oxide and crystalline aluminosilicate zeolite having a silica to alumina mole ratio of at least about 12:1 and a constraint index of from 1 to about 12.
Inventors
- 👤 Ronnie M. Hanes
- 👤 Orville D. Prampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:55
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
51 words
A process for preparing methyl tertiary-butyl ether which comprises reacting isobutylene and methanol in the presence of a catalytically effective amount of at least one heterogeneous catalyst selected from the group consisting of boron phosphate and blue tungsten oxide at a temperature of from about 50° C. to about 400° C.
Claim 2
Dependent Claim
51 words
A process for preparing methyl tertiary-butyl ether which comprises reacting isobutylene and methanol in the presence of a catalytically effective amount of at least one heterogeneous catalyst selected from the group consisting of boron phosphate and blue tungsten oxide at a temperature of from about 50° C. to about 400° C.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the mole ratio of methanol to isobutylene is from about 0.1:1 to about 10:1.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the mole ratio of methanol to isobutylene is from about 0.5 to about 1:1.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein the mole ratio of boron to phosphorus in the boron phosphate is from about 0.4 to about 1.4.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein the mole ratio of boron to phosphorus in the boron phosphate is from about 0.5 to about 0.7.
Claim 7
Dependent Claim
22 words
The process of claim 1 wherein the catalyst composition comprises boron phosphate and/or blue tungsten oxide supported upon in inert inorganic carrier.
Claim 8
Dependent Claim
31 words
The process of claim 1 wherein the carrier is selected from the group consisting of zinc spinel, alumina, silica, magnesia, titania, silica-alumina, alumina-magnesia, zirconia, pumice, kieselguhr, a clay, bauxite and charcoal.
Claim 9
Dependent Claim
27 words
The process of claim 1 wherein the reaction of isobutylene and methanol is carried out at a temperature of from about 125° C. to about 200° C.
Claim 10
Dependent Claim
26 words
The process of claim 1 wherein the reaction of isobutylene and methanol is carried out at a pressure of from about atmospheric to about 1,500 psig.
Claim 11
Dependent Claim
27 words
The process of claim 1 wherein the reaction of isobutylene and methanol is carried out at a pressure of from about 25 psig to about 1,000 psig.
Claim 12
Dependent Claim
20 words
The process of claim 1 wherein the mole ratio of catalyst to isobutylene is from about 1:10 to about 1:10,000.
Claim 13
Dependent Claim
20 words
The process of claim 1 wherein the mole ratio of catalyst to isobutylene is from about 1:100 to about 1:500.
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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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |