US3876706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing hydroxy aldehydes and keto-alcohols
Assignee: Individual
•
Filing: 1971-02-24
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Granted: 1975-04-08
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Expires: 1991-02-24
Abstract
Abstract A method of producing hydroxy aldehydes or keto-alcohols characterized in that aldehydes or ketones are reacted with formaldehyde with the use of a catalyst which is a kaolin calcined at a temperature of 500.degree.-700.degree.C, in the presence of a tertiary amine. The aforementioned kaolin may be promoted with magnesium or calcium hydroxides. The catalyst exhibits high activity over a prolonged period, viz. 3-5 years. The present method may be used in producing polyhydric alcohols used in the manufacture of polymeric materials.
Inventors
- 👤 Oleg Evgenievich Levanevsky
- 👤 Faina Alexandrovna Demina
- 👤 Alevtina Ivanovna Shirobokova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:46
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/75; B; B01; B01J; B01J21/00; B01J21/16; B01J23/00; B01J23/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A METHOD FOR PRODUCING AN HYDROXYALDEHYDE COMPRISING THE STEP OF CONDENSING AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ACETADEHYDE, PROPIONALDEHYDE, NBUTYRALDEHYDE, ISOBUTYRALDEHYDE, N-VALERAKDEHYDE AND ISOVALERALDEHYDE WITH FORMALDEHYDE IN THE PRESENCE OF A CATALYST, AND ETHANOL AS A SOLVET IF NECESSARY TO FORM A HOMOGENEOUS SOLUTION, AND AT A PH OF 9.5-10.0 MAINTAINED BY THE PRESENCE OF A TERTIARY AMINE WHOSE BOILING POINT IS LOWER THAN THAT OF THE CONDENSATION PRODUCT OBTAINED, SAID CATALYST COMPRISRING A KAOLIN CALCINED AT A TEMPERATURE OF 500*-700*C. AND THE MOLE RATIO OF ALDEHYDE TO FORMALDEHYDE BEING 1:3.
Claim 2
Independent Claim
93 words
A METHOD FOR PRODUCING AN HYDROXYALDEHYDE COMPRISING THE STEP OF CONDENSING AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ACETADEHYDE, PROPIONALDEHYDE, NBUTYRALDEHYDE, ISOBUTYRALDEHYDE, N-VALERAKDEHYDE AND ISOVALERALDEHYDE WITH FORMALDEHYDE IN THE PRESENCE OF A CATALYST, AND ETHANOL AS A SOLVET IF NECESSARY TO FORM A HOMOGENEOUS SOLUTION, AND AT A PH OF 9.5-10.0 MAINTAINED BY THE PRESENCE OF A TERTIARY AMINE WHOSE BOILING POINT IS LOWER THAN THAT OF THE CONDENSATION PRODUCT OBTAINED, SAID CATALYST COMPRISRING A KAOLIN CALCINED AT A TEMPERATURE OF 500*-700*C. AND THE MOLE RATIO OF ALDEHYDE TO FORMALDEHYDE BEING 1:3.
Claim 3
Dependent Claim
22 words
A method according to claim 1, wherein the process is carried out using kaolin promoted with a 0.05-0.1% aqueous suspension of magnesium
Claim 4
Dependent Claim
23 words
A method according to claim 1, wherein the process is carried out using kaolin promoted with a 0.05-0.1% aqueous suspension of calcium hydroxide.
Claim 5
Dependent Claim
34 words
A method according to claim 1, wherein the temperature at which the process is carried out is 5.degree.-10.degree.C lower than the boiling point of the lowest boiling component of the mixture at normal pressure.
Claim 6
Dependent Claim
12 words
A process according to claim 1 wherein the tertiary amine is triethylamine.
References Cited (Backward Citations)
US1896240A
Cited
US1878040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |