GB909216A - Separation process - Google Patents
Separation processInfo
- Publication number
- GB909216A GB909216A GB1771460A GB1771460A GB909216A GB 909216 A GB909216 A GB 909216A GB 1771460 A GB1771460 A GB 1771460A GB 1771460 A GB1771460 A GB 1771460A GB 909216 A GB909216 A GB 909216A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- acid
- alcohol
- trichlorobenzoic
- unesterified
- 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
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification
- C07C51/493—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification whereby carboxylic acid esters are formed
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
2 : 3 : 6-Trichlorobenzoic acid is separated from a mixture of polychlorobenzoic acids by treating the mixture with an alcohol under esterifying conditions and thereafter separating the unesterified 2 : 3 : 6-trichlorobenzoic acid from the mixture. The mixture may be heated with the alcohol e.g. methanol, ethanol, propanol, butanol, and beta-ethoxyethyl alcohol preferably in the proportions of at least 2 molecular proportions of alcohol for each molecular proportion of esterifiable acids in the mixture, with the addition of an acid esterification catalyst e.g. sulphuric or hydrochloric acid. The unesterified acid is separated from the esterification mixture by extraction with water in a base, e.g. sodium or potassium carbonate or sodium or potassium bicarbonate, or an organic base and thereafter the trichlorobenzoic acid is recovered as free acid by acidification of the aqueous phase from the extraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1771460A GB909216A (en) | 1960-05-19 | 1960-05-19 | Separation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1771460A GB909216A (en) | 1960-05-19 | 1960-05-19 | Separation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB909216A true GB909216A (en) | 1962-10-31 |
Family
ID=10099924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1771460A Expired GB909216A (en) | 1960-05-19 | 1960-05-19 | Separation process |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB909216A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249900A (en) * | 2011-05-16 | 2011-11-23 | 浙江师范大学 | Method for separation and purification of 2-adamantanecarboxylic acid and 1-adamantanecarboxylic acid |
-
1960
- 1960-05-19 GB GB1771460A patent/GB909216A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249900A (en) * | 2011-05-16 | 2011-11-23 | 浙江师范大学 | Method for separation and purification of 2-adamantanecarboxylic acid and 1-adamantanecarboxylic acid |
| CN102249900B (en) * | 2011-05-16 | 2013-09-18 | 浙江师范大学 | Method for separation and purification of 2-adamantanecarboxylic acid and 1-adamantanecarboxylic acid |
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