GB512723A - Improvements in the recovery of phenolic substances from aqueous liquors - Google Patents
Improvements in the recovery of phenolic substances from aqueous liquorsInfo
- Publication number
- GB512723A GB512723A GB763538A GB763538A GB512723A GB 512723 A GB512723 A GB 512723A GB 763538 A GB763538 A GB 763538A GB 763538 A GB763538 A GB 763538A GB 512723 A GB512723 A GB 512723A
- Authority
- GB
- United Kingdom
- Prior art keywords
- butyl acetate
- aqueous
- recovery
- phenols
- separated
- 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
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
- C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
- C07C37/72—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by liquid-liquid treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
512,723. Recovery of phenols. SOUTH METROPOLITAN GAS CO., GARDNER, W. F., and STANIER, H. March 11, 1938, No. 7635. [Class 2 (iii)] Phenolic substances are recovered from aqueous liquors by extracting with a liquid alkyl ester of the general formula CnN2nO2 derived from a saturated fatty acid by esterification with a saturated monohydric alcohol. Esters referred to are propyl, butyl and amyl esters of acetic, propionic, butyric and valeric acids. In examples: (1) aqueous liquors from low' temperature carbonization processes, acidified with dilute H2SO4 to a pH of not more than 4.5, are fed through the towers 1, 2 and 3, which contain butyl acetate. Saturated solvent is drawn off from tower 1, fresh solvent being added to tower 3, and the butyl acetate and phenols are separated by distillation ; (2) aqueous condensates, formed in recovery of NH3 from liquors obtained in high temperature carbonization are treated as in example 1, the phenols being separated from butyl acetate by washing with caustic alkali solution, which is then acidified; (3) resoreinol is recovered from the aqueous solution of the products' of fusing the sodium salt of benzene-m-disulphonic acid .with caustic soda by extraction with butyl acetate as in example 1. Butyl acetate is separated from resorcinol by distillation and the latter purified by distillation under reduced pressure. Specification 328,388, [Class 2 (iii)], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB763538A GB512723A (en) | 1938-03-11 | 1938-03-11 | Improvements in the recovery of phenolic substances from aqueous liquors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB763538A GB512723A (en) | 1938-03-11 | 1938-03-11 | Improvements in the recovery of phenolic substances from aqueous liquors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB512723A true GB512723A (en) | 1939-09-25 |
Family
ID=9836888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB763538A Expired GB512723A (en) | 1938-03-11 | 1938-03-11 | Improvements in the recovery of phenolic substances from aqueous liquors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB512723A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0031530B1 (en) * | 1979-12-12 | 1984-03-21 | Mitsubishi Kasei Corporation | Process for producing pyrogallol |
| DE3816041A1 (en) * | 1988-05-10 | 1989-11-23 | Passavant Werke | Process for separating off organic compounds from water |
| CN116573990A (en) * | 2023-05-16 | 2023-08-11 | 石家庄绿田科技有限公司 | Method for recovering resorcinol from waste activated carbon generated in 2, 6-dihydroxybenzoic acid production |
-
1938
- 1938-03-11 GB GB763538A patent/GB512723A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0031530B1 (en) * | 1979-12-12 | 1984-03-21 | Mitsubishi Kasei Corporation | Process for producing pyrogallol |
| DE3816041A1 (en) * | 1988-05-10 | 1989-11-23 | Passavant Werke | Process for separating off organic compounds from water |
| CN116573990A (en) * | 2023-05-16 | 2023-08-11 | 石家庄绿田科技有限公司 | Method for recovering resorcinol from waste activated carbon generated in 2, 6-dihydroxybenzoic acid production |
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