US4153810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of alkyl ethers
Assignee: Haarmann and Reimer GmbH
•
Filing: 1977-11-18
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Granted: 1979-05-08
•
Expires: 1997-11-18
Abstract
Abstract Process for the preparation of alkyl aryl ethers by reacting aromatic hydroxy compounds with aliphatic alcohols in the presence of strongly acidic cation exchangers based on synthetic resins using the aromatic hydroxy compound in excess of the aliphatic alcohol.
Inventors
- 👤 Rainer Neumann
- 👤 Hans-Helmut Schwarz
- 👤 Karl-Heinz Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:46
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/09
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
48 words
In the known process for the preparation of alkyl aryl ethers by reacting aromatic hydroxy compounds with aliphatic alcohols in the presence of strongly acidic cation exchangers based on synthetic resins the improvement comprising using at least 3 moles of aromatic hydroxy compound per mol of aliphatic alcohol.
Claim 2
Dependent Claim
48 words
In the known process for the preparation of alkyl aryl ethers by reacting aromatic hydroxy compounds with aliphatic alcohols in the presence of strongly acidic cation exchangers based on synthetic resins the improvement comprising using at least 3 moles of aromatic hydroxy compound per mol of aliphatic alcohol.
Claim 3
Dependent Claim
19 words
The process according to claim 1, wherein the molar ratio of aromatic hydroxy compound to aliphatic alcohol is 3-5:1.
Claim 4
Dependent Claim
29 words
The process according to claim 1, wherein a gel-type polystyrene sulphonic acid cross-linked with 2 to 4% by weight of divinyl benzene is used as strongly acidic cation exchanger.
Claim 5
Dependent Claim
20 words
The process according to claim 1, wherein the reactants consist essentially of the aromatic hydroxy compound and the aliphatic alcohol.
Claim 6
Dependent Claim
31 words
The process according to claim 1, wherein the aliphatic alcohol is selected from the group consisting of methanol, ethanol, propanol, butanol, isobutanol, pentanol, isopentanol, hexanol, isohexanol, heptanol, isoheptanol, octanol and isooctanol.
Claim 7
Dependent Claim
55 words
The process according to claim 5, wherein the reactants consist essentially of the aromatic hydroxy compound and the aliphatic alcohol, the molar ratio of aromatic hydroxy compound to aliphatic alcohol is 3-5:1, and a gel-type polystyrene sulphonic acid cross-linked with 2 to 4% by weight of divinyl benzene is used as strongly acidic cation exchanger.
References Cited (Backward Citations)
SU197613A1
Cited
US3584058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |