GB927809A - Improvements in and relating to glycols - Google Patents
Improvements in and relating to glycolsInfo
- Publication number
- GB927809A GB927809A GB3848960A GB3848960A GB927809A GB 927809 A GB927809 A GB 927809A GB 3848960 A GB3848960 A GB 3848960A GB 3848960 A GB3848960 A GB 3848960A GB 927809 A GB927809 A GB 927809A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glycol
- inert
- vapour
- steam
- distillation
- 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
A substantially smell-free glycol is produced by a process comprising distilling the glycol in a distillation column throughout which an inert atmosphere is maintained by an inert vapour during the distillation of the glycol, the volatile impurities being carried overhead with the inert vapour and the glycol being recovered as a side-stream below. Suitable inert vapours are, for example, steam and nitrogen. When steam is used to provide the inert vapour it may be admitted into the boiler as water either with the crude glycol vapour or separately. When steam is used as the inert vapour the glycol product may contain a little water and this may be removed by treating the product with dehydrating agents or by a further distillation according to the invention using a dry inert gas. The process may be carried out batchwise or continuously and the boiler contents are preferably maintained in a slightly alkaline condition by the addition of an inorganic base, such as sodium hydroxide or an organic base, particularly an amine with antioxidant properties such as NN1-di-sec-butyl-p-phenylene diamine. Examples are given of the purification of propylene glycol, and dipropylene glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3848960A GB927809A (en) | 1960-11-09 | 1960-11-09 | Improvements in and relating to glycols |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3848960A GB927809A (en) | 1960-11-09 | 1960-11-09 | Improvements in and relating to glycols |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB927809A true GB927809A (en) | 1963-06-06 |
Family
ID=10403797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3848960A Expired GB927809A (en) | 1960-11-09 | 1960-11-09 | Improvements in and relating to glycols |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB927809A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3367847A (en) * | 1966-02-01 | 1968-02-06 | Du Pont | Purification of ethylene glycol containing salts of terephthalic acid by plural distiallation |
| US3489655A (en) * | 1967-12-26 | 1970-01-13 | Celanese Corp | Method of decreasing the odor of 1,3-butylene glycol |
| JPS49211A (en) * | 1972-04-20 | 1974-01-05 | ||
| FR2393783A1 (en) * | 1977-06-06 | 1979-01-05 | Halcon Res & Dev | PERFECTED PROCESS FOR RECOVERING ALKYLENE-GLYCOLS BY AZEOTROPIC DISTILLATION |
-
1960
- 1960-11-09 GB GB3848960A patent/GB927809A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3367847A (en) * | 1966-02-01 | 1968-02-06 | Du Pont | Purification of ethylene glycol containing salts of terephthalic acid by plural distiallation |
| US3489655A (en) * | 1967-12-26 | 1970-01-13 | Celanese Corp | Method of decreasing the odor of 1,3-butylene glycol |
| JPS49211A (en) * | 1972-04-20 | 1974-01-05 | ||
| FR2393783A1 (en) * | 1977-06-06 | 1979-01-05 | Halcon Res & Dev | PERFECTED PROCESS FOR RECOVERING ALKYLENE-GLYCOLS BY AZEOTROPIC DISTILLATION |
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