US4238629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of a mixture of 2-and 4-hydroxybenzyl alcohol
Assignee: Bayer AG
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Filing: 1979-08-30
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Granted: 1980-12-09
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Expires: 1999-08-30
Abstract
Abstract Mixtures of 2- and 4-hydroxybenzyl alcohol with high contents of 4-hydroxybenzyl alcohol are obtained by a process comprising reacting phenol and paraformaldehyde in the presence of a strongly basic catalyst and a polyalkylene polyether.
Inventors
- 👤 Kurt Bauer
- 👤 Reiner Molleken
- 👤 Karlfried Wedemeyer
- 👤 Helmut Fiege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:43
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/115; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
In the known process for the preparation of a mixture of 2- and 4-hydroxybenzyl alcohol by reacting phenol and paraformaldehyde in the presence of strongly basic catalyst, the improvement comprising carrying out the reaction in the presence of a polyalkylene polyether having a molecular weight of 140 to 14,000, 0.05 to 10 g of polyalkylene polyether being used per mol of phenol.
Claim 2
Dependent Claim
62 words
In the known process for the preparation of a mixture of 2- and 4-hydroxybenzyl alcohol by reacting phenol and paraformaldehyde in the presence of strongly basic catalyst, the improvement comprising carrying out the reaction in the presence of a polyalkylene polyether having a molecular weight of 140 to 14,000, 0.05 to 10 g of polyalkylene polyether being used per mol of phenol.
Claim 3
Dependent Claim
24 words
The process according to claim 1, wherein the polyalkylene polyether is used in an amount of 0.1 to 5 g per mol of phenol.
Claim 4
Dependent Claim
22 words
The process according to claim 1, wherein the polyalkylene polyether is a polyalkylene glycol, a monoether or diether thereof and/or crown ether.
Claim 5
Dependent Claim
19 words
The process according to claim 1, wherein the polyalkylene polyether is a polyethylene glycol, a monoether or diether thereof.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |