GB527030A - A process for the extraction of mixtures of isomeric organic compounds - Google Patents
A process for the extraction of mixtures of isomeric organic compoundsInfo
- Publication number
- GB527030A GB527030A GB971139A GB971139A GB527030A GB 527030 A GB527030 A GB 527030A GB 971139 A GB971139 A GB 971139A GB 971139 A GB971139 A GB 971139A GB 527030 A GB527030 A GB 527030A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isomers
- mixture
- solvents
- extraction
- nitrophenol
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
- C07C201/16—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/07—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms
- C07C205/11—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to carbon atoms of six-membered aromatic rings
- C07C205/12—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to carbon atoms of six-membered aromatic rings the six-membered aromatic ring or a condensed ring system containing that ring being substituted by halogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/13—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups
- C07C205/20—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups having nitro groups and hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C07C205/21—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups having nitro groups and hydroxy groups bound to carbon atoms of six-membered aromatic rings having nitro groups and hydroxy groups bound to carbon atoms of the same non-condensed six-membered aromatic ring
- C07C205/22—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups having nitro groups and hydroxy groups bound to carbon atoms of six-membered aromatic rings having nitro groups and hydroxy groups bound to carbon atoms of the same non-condensed six-membered aromatic ring having one nitro groups bound to the ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/34—Separation; Purification; Stabilisation; Use of additives
- C07C41/38—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/48—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
527,030. Separating mixtures of isomers. FIFE, J. G. (Naamlooze Vennootschap de Bataafsche Petroleum Maatschappij). March 28, 1939, No. 9711. Drawings to Provisional Specification. [Class 2 (iii)] Mixtures of isomeric organic compounds whose isomerism is due to a difference in the position of the polar groups present are separated by extraction with two solvents, preferably moving in countercurrent, which have such a difference in polarity that two liquid phases are formed. The extraction apparatus may comprise alternate mixing and settling zones or centrifugal separators, the solvents being introduced at spaced points and the mixture of isomers preferably introduced at an intermediate point. The temperature in the extraction zone may be regulated, by means of heat-exchange coils, to give either a uniform temperature or a temperature gradient. When the dissolving capacity of one solvent is much greater than that of the other, it may be necessary to reduce the solvent power of one solvent or increase that of the other by using a mixture of solvents in place of one or both of the solvents, the mixture being chosen according to various considerations discussed in the Specification. If the mixture contains more than two isomers, it is possible to separate a single isomer from a combination of isomers, according to the conditions employed. When the initial mixture contains the isomers to be separated and a third component which is a solvent for at least one of the isomers, the third component may serve as one of the solvents and it is necessary to add only one solvent for the extraction. As mixtures of isomers are specified o- and p-chlornitrobenzene, o- and p-nitrophenol, o- and p-vanillin, o- and p-hydroxybenzaldehyde, o- and p-xylene, o- and p-cetylbenzenesulphonic acid, and primary and secondary butyl alcohol; also mixtures of methylpropylketone and diethylketone, methylsuccinic acid and glutaric acid, and of resorcinol, pyrocatechol and hydroquinone. Examples of polar solvents that may be used are water, methanol, ethanol, benzyl alcohol, furfural, nitrobenzene, propionitrile, phenol, cresol, aniline, the lower fatty acids, e.g. acetic acid and the lower ketones, e.g. methylethylketone. Non-polar or less polar solvents mentioned are pentane, gasoline, benzene, kerosene, gas oil, lubricating oil, ether, trichlorethylene and carbon tetrachloride. The examples describe the isolation of p-vanillin from a crude vanillin mixture, and the separation of o- and p-nitrophenol, o- and p-dihydroxybenzene, o- and p-hydroxybenzaldehyde, o- and p-methoxyphenol, o- and p-ethoxyaniline, and of propane -1:1- and -1 : 3-dicarboxylic acid. In a typical example, a mixture of equal parts of o- and p-nitrophenol are introduced into the middle of an extraction system of 7 stages, each consisting of a mixing and settling space. At stage 1 is introduced 50 per cent. aqueous ethanol and at stage 7 a mixture of equal parts by volume of gasoline and benzene. From the alcohol phase leaving at stage 7 p-nitrophenol is obtained by distillation, whilst the gasoline phase withdrawn at stage 1 yields o-nitrophenol. Specifications 355,294, 417,617, [Group III], and 452,427 are referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US264034A US2245945A (en) | 1938-03-30 | 1939-03-24 | Extraction of mixtures of isomeric organic compounds |
GB971139A GB527030A (en) | 1939-03-28 | 1939-03-28 | A process for the extraction of mixtures of isomeric organic compounds |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB971139A GB527030A (en) | 1939-03-28 | 1939-03-28 | A process for the extraction of mixtures of isomeric organic compounds |
Publications (1)
Publication Number | Publication Date |
---|---|
GB527030A true GB527030A (en) | 1940-10-01 |
Family
ID=9877299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB971139A Expired GB527030A (en) | 1938-03-30 | 1939-03-28 | A process for the extraction of mixtures of isomeric organic compounds |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB527030A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2223959A (en) * | 1988-09-12 | 1990-04-25 | First Chemical Corp | Recovering nitrophenolic by-products. |
-
1939
- 1939-03-28 GB GB971139A patent/GB527030A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2223959A (en) * | 1988-09-12 | 1990-04-25 | First Chemical Corp | Recovering nitrophenolic by-products. |
GB2223959B (en) * | 1988-09-12 | 1992-05-13 | First Chemical Corp | Treatment of nitrophenolic by-products |
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