GB355018A - An improved process for the separation of para-toluidine from mixtures of ortho-toluidine and para-toluidine - Google Patents
An improved process for the separation of para-toluidine from mixtures of ortho-toluidine and para-toluidineInfo
- Publication number
- GB355018A GB355018A GB2409330A GB2409330A GB355018A GB 355018 A GB355018 A GB 355018A GB 2409330 A GB2409330 A GB 2409330A GB 2409330 A GB2409330 A GB 2409330A GB 355018 A GB355018 A GB 355018A
- Authority
- GB
- United Kingdom
- Prior art keywords
- toluidine
- para
- sulphur dioxide
- residue
- mixtures
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
By the treatment of mixtures of o- and p-toluidine with a limited quantity of sulphur dioxide, preferably in the presence of a little water, a solid compound of p-toluidine and sulphur dioxide, with or without water, is formed and is separated from the residual liquor by filtration and pressing. The solid compound is decomposed by moderate heating preferably under reduced pressure giving practically pure p-toluidine. The residue after the separation of the solid p-toluidine compound is similar in composition to the commercial o-toluidine but also contains a little sulphur dioxide and may be worked up by distillation preferably under reduced pressure or by washing with alkali to give pure o-toluidine the residue may be mixed with sulphuric acid and steam distilled or to give the hydrochloride the residue may be treated with hydrochloric acid; in both these processes the liberated sulphur dioxide should be collected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2409330A GB355018A (en) | 1930-08-12 | 1930-08-12 | An improved process for the separation of para-toluidine from mixtures of ortho-toluidine and para-toluidine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2409330A GB355018A (en) | 1930-08-12 | 1930-08-12 | An improved process for the separation of para-toluidine from mixtures of ortho-toluidine and para-toluidine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB355018A true GB355018A (en) | 1931-08-20 |
Family
ID=10206257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2409330A Expired GB355018A (en) | 1930-08-12 | 1930-08-12 | An improved process for the separation of para-toluidine from mixtures of ortho-toluidine and para-toluidine |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB355018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4174351A (en) * | 1978-08-28 | 1979-11-13 | Uop Inc. | Separation of dissimilar amines |
-
1930
- 1930-08-12 GB GB2409330A patent/GB355018A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4174351A (en) * | 1978-08-28 | 1979-11-13 | Uop Inc. | Separation of dissimilar amines |
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