GB783454A - Improvements in or relating to process of extracting sodium vanillinate - Google Patents
Improvements in or relating to process of extracting sodium vanillinateInfo
- Publication number
- GB783454A GB783454A GB739655A GB739655A GB783454A GB 783454 A GB783454 A GB 783454A GB 739655 A GB739655 A GB 739655A GB 739655 A GB739655 A GB 739655A GB 783454 A GB783454 A GB 783454A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vanillinate
- per cent
- liquor
- sodium
- propanol
- 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
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/80—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A process for extracting sodium vanillinate from an aqueous liquor containing the same, together with other dissolved solids, using a propanol as the liquor-immiscible preferential solvent for the sodium vanillinate, comprises mixing the aqueous liquor with an aqueous propanol in such proportions as to form a two-phase extraction system in which the raffinate has a solids content of 20 to 40 per cent by weight and propanol (100 per cent basis) is present in an amount equal to at least 30 per cent of the combined weight of the extract and the raffinate. Autoclaved liquors, the aqueous alkaline sodium vanillinate-containing liquors obtained from the oxidative treatment in an autoclave of crude lignin-containing liquors, e.g. waste sulphite liquor, may be employed as starting materials. The process may be carried out in a series of batchwise stages or continuously in countercurrent processes. In examples: a crude sodium vanillinate obtained by autoclaving waste sulphite liquor, to which caustic soda has been added, under oxidizing conditions, is concentrated and treated with 80 per cent propanol to extract 78 per cent of the sodium vanillinate contained in the autoclaved liquor (1) whilst a similar process is carried out in a countercurrent, five stage, batchwise system using 78 per cent isopropanol (2). Specification 490,646, [Group IV], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB739655A GB783454A (en) | 1955-03-14 | 1955-03-14 | Improvements in or relating to process of extracting sodium vanillinate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB739655A GB783454A (en) | 1955-03-14 | 1955-03-14 | Improvements in or relating to process of extracting sodium vanillinate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB783454A true GB783454A (en) | 1957-09-25 |
Family
ID=9832308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB739655A Expired GB783454A (en) | 1955-03-14 | 1955-03-14 | Improvements in or relating to process of extracting sodium vanillinate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB783454A (en) |
-
1955
- 1955-03-14 GB GB739655A patent/GB783454A/en not_active Expired
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