US3764630A
Expired / Lapsed
US
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Alkylation process
Assignee: General Electric Co
•
Filing: 1970-07-22
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Granted: 1973-10-09
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Expires: 1990-07-22
Abstract
Abstract There is provided a process for selectively alkylating a phenolic compound in the orthoposition to the significant reduction of alkylation in the meta- and para-positions which comprises alkylating the phenolic compound with an alkanol in the presence of water and a molybdenum catalyst in admixture with magnesium oxide, in the vapor phase at a temperature of from 200* to 600*C.
Inventors
- 👤 Bernardus J Van Sorge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:38
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
16 words
A process as defined in claim 1 wherein said phenolic compound is of the general formula
Claim 2
Dependent Claim
12 words
A process as defined in claim 2 wherein each R is hydrogen.
Claim 3
Dependent Claim
27 words
A process as defined in claim 3 wherein the ratio of alkanol to phenolic compound is at least two moles of alkanol per mole of phenolic compound.
Claim 4
Dependent Claim
14 words
A process as defined in claim 1 wherein said catalytically-active compound is molybdenum oxide.
Claim 5
Dependent Claim
14 words
A process as defined in claim 1 wherein said catalytically-active compound is ammonium para-molybdate.
Claim 6
Dependent Claim
19 words
A process as defined in claim 1 wherein the alkanol is a (lower)alkanol of up to 6 carbon atoms.
Claim 7
Dependent Claim
12 words
A process as defined in claim 7 wherein said (lower)-alkanol is methanol.
Claim 8
Dependent Claim
49 words
A process wherein phenol is reacted with methanol in the presence of water and a catalytic amount of at least 2 percent by weight of ammonium para-molybdate in admixture with magnesium oxide, in the vapor phase, at a temperature of from about 200*C to about 490*C, to produce 2,6-xylenol.
Claim 9
Dependent Claim
25 words
A process as defined in claim 9 wherein the ratio of methanol to phenol is at least two moles of methanol per mole of phenol.
Claim 10
Dependent Claim
17 words
A process as defined in claim 10 wherein said temperature is from about 430* to about 450*C.
Claim 11
Dependent Claim
30 words
A process as defined in claim 11 wherein the water comprises from about 10 to about 75 percent by volume based on the combined volume of phenol, methanol and water.
Claim 12
Dependent Claim
26 words
A process as defined in claim 9 wherein the ammonium para-molybdate in admixture with magnesium oxide has been calcined before being contacted with phenol and methanol.
Claim 13
Dependent Claim
24 words
A process as defined in claim 13 wherein the calcined admixture contains from about 2 to about 10 percent by weight of molybdenum values.
Claim 14
Dependent Claim
13 words
A process for the ortho-alkylation of a phenolic compound of the general formula:
Claim 15
Dependent Claim
31 words
A process as defined in claim 15 wherein said mixTure of magnesium oxide and said catalytic compound has been calcined prior to being contacted with said phenolic compound and said alkanol.
References Cited (Backward Citations)
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |