US3075015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for the recovery of phenols and carbonyl compounds from crude bisphenolic condensation products
Assignee: Bayer AG
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Filing: 1959-12-22
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Granted: 1963-01-22
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Expires: 1979-12-22
Abstract
No abstract record available.
Inventors
- 👤 Meyer Karl-Heinrich
- 👤 Schnell Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:13
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/85; C07C37/00; C07C37/50; C07C37/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR THE RECOVERY OF A PHENOL AND A CARBONYL COMPOUND FROM A CRUDE ALKALI-SOLUBLE BISPHENOLIC CONDENSATION PRODUCT OF (A) A PHENOL OF THE GROUP CONSISTING OF PHENOL AND METHYL-SUBSTITUTED HYDROXYBENZENES, AND (B) A CARBONYL COMPOUND OF THE GROUP CONSISTING OF FORMALDEHYDE, ACETALDEHYDE, BENZALDEHYDE, LOWER ALKANONES HAVING FEWER THAN SIX CARBON ATOMS, ACETOPHENONES, CYCLOHEXANONE, AND BENZOPHENONE, WHICH COMPRISES HEATING THE SAID CONDENSATION PRODUCT WHILE DISSOLVED IN AN AQUEOUS SOLUTION OF A BASE OF THE GROUP CONSISTING OF AMONIA AND ALKALI-METAL AND ALKALINEEARTH-METAL HYDROXIDES AND CARBONATES AT A PRESSURE BETWEEN ABOUT 5 AND ABOUT 150 ATMOSPHERES AND A TEMPERATURE BETWEEN ABOUT 150 AND 320*C., AND SUBSENQNENTLY SEPARATING AND RECOVERING THE PHENOL AND THE CARBONYL COMPOUND FROM THE RESULTING HYDROLYSIS PRODUCTS.
Claim 2
Dependent Claim
120 words
A PROCESS FOR THE RECOVERY OF A PHENOL AND A CARBONYL COMPOUND FROM A CRUDE ALKALI-SOLUBLE BISPHENOLIC CONDENSATION PRODUCT OF (A) A PHENOL OF THE GROUP CONSISTING OF PHENOL AND METHYL-SUBSTITUTED HYDROXYBENZENES, AND (B) A CARBONYL COMPOUND OF THE GROUP CONSISTING OF FORMALDEHYDE, ACETALDEHYDE, BENZALDEHYDE, LOWER ALKANONES HAVING FEWER THAN SIX CARBON ATOMS, ACETOPHENONES, CYCLOHEXANONE, AND BENZOPHENONE, WHICH COMPRISES HEATING THE SAID CONDENSATION PRODUCT WHILE DISSOLVED IN AN AQUEOUS SOLUTION OF A BASE OF THE GROUP CONSISTING OF AMONIA AND ALKALI-METAL AND ALKALINEEARTH-METAL HYDROXIDES AND CARBONATES AT A PRESSURE BETWEEN ABOUT 5 AND ABOUT 150 ATMOSPHERES AND A TEMPERATURE BETWEEN ABOUT 150 AND 320*C., AND SUBSENQNENTLY SEPARATING AND RECOVERING THE PHENOL AND THE CARBONYL COMPOUND FROM THE RESULTING HYDROLYSIS PRODUCTS.
References Cited (Backward Citations)
US2841622A
Cited
US2497503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |