GB514693A - Improvements in and relating to the production of polyhydric alcohols - Google Patents
Improvements in and relating to the production of polyhydric alcoholsInfo
- Publication number
- GB514693A GB514693A GB1411638A GB1411638A GB514693A GB 514693 A GB514693 A GB 514693A GB 1411638 A GB1411638 A GB 1411638A GB 1411638 A GB1411638 A GB 1411638A GB 514693 A GB514693 A GB 514693A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrogenation
- formaldehyde
- polyhydric alcohols
- catalyst
- mixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/18—Polyhydroxylic acyclic alcohols
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
514,693. Polyhydric alcohols. HELLICAR, A. G., TAYLOR, A. W. C., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. May 11, 1938, No. 14116. [Class 2 (iii)] Polyhydric alcohols are prepared by the hydrogenation of an aqueous mixture containing hydroxy - aldehydes and hydroxy - ketones resulting from the condensation of formaldehyde in aqueous medium and containing residual formaldehyde by subjecting the mixture to the action of hydrogen in the presence of a hydrogenating catalyst and maintaining the pH of the reaction mixture (as measured at atmospheric pressure and a temperature of 20‹C.) within the limits 6.5-10 and preferably within the limits 7-9 by adding to the reaction mixture a substance or substances having an alkaline reaction. Suitable alkaline substances are potassium hydroxide, sodium hydroxide, calcium carbonate, magnesium oxide or magnesium carbonate or non-volatile organic nitrogen bases, e.g., triethylanine,ethanolamines or pyridine or the salts of a weak base with a strong acid, e.g., sodium formate, sodium acetate or disodium orthophosphate. Nickel is preferably used as the hydrogenation catalyst and the hydrogenation may be carried out under increased pressure at an elevated temperature. In the examples a solution prepared by the condensation of formaldehyde in aqueous medium according to the process described in Specification 513,708, is hydrogenated in the presence of magnesium oxide or sodium hydroxide and a nickel catalyst, on kieselguhr as a carrier.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1411638A GB514693A (en) | 1938-05-11 | 1938-05-11 | Improvements in and relating to the production of polyhydric alcohols |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1411638A GB514693A (en) | 1938-05-11 | 1938-05-11 | Improvements in and relating to the production of polyhydric alcohols |
Publications (1)
Publication Number | Publication Date |
---|---|
GB514693A true GB514693A (en) | 1939-11-15 |
Family
ID=10035284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1411638A Expired GB514693A (en) | 1938-05-11 | 1938-05-11 | Improvements in and relating to the production of polyhydric alcohols |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB514693A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2467451A (en) * | 1944-10-09 | 1949-04-19 | Celanese Corp | Manufacture of cyclic aliphatic dihydroxy compounds |
US2775622A (en) * | 1951-03-27 | 1956-12-25 | Heyden Chemical Corp | 2, 2-dimethylol-1, 5-dihydroxypentane and derivatives thereof |
US2989569A (en) * | 1955-02-04 | 1961-06-20 | Udic Sa | Conversion of wood sugars to polyols |
EP0007100A2 (en) * | 1978-07-19 | 1980-01-23 | Bayer Ag | Process for preparing low molecular weight polyhydroxylic compounds and their use |
US4258222A (en) * | 1978-07-19 | 1981-03-24 | Bayer Aktiengesellschaft | Process for the production of low molecular weight polyhydroxyl compounds |
-
1938
- 1938-05-11 GB GB1411638A patent/GB514693A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2467451A (en) * | 1944-10-09 | 1949-04-19 | Celanese Corp | Manufacture of cyclic aliphatic dihydroxy compounds |
US2775622A (en) * | 1951-03-27 | 1956-12-25 | Heyden Chemical Corp | 2, 2-dimethylol-1, 5-dihydroxypentane and derivatives thereof |
US2989569A (en) * | 1955-02-04 | 1961-06-20 | Udic Sa | Conversion of wood sugars to polyols |
EP0007100A2 (en) * | 1978-07-19 | 1980-01-23 | Bayer Ag | Process for preparing low molecular weight polyhydroxylic compounds and their use |
EP0007100A3 (en) * | 1978-07-19 | 1980-02-06 | Bayer Ag | Process for preparing low molecular weight polyhydroxylic compounds and their use |
US4258222A (en) * | 1978-07-19 | 1981-03-24 | Bayer Aktiengesellschaft | Process for the production of low molecular weight polyhydroxyl compounds |
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