GB639367A - Manufacture of halogenated amines - Google Patents
Manufacture of halogenated aminesInfo
- Publication number
- GB639367A GB639367A GB15161/48A GB1516148A GB639367A GB 639367 A GB639367 A GB 639367A GB 15161/48 A GB15161/48 A GB 15161/48A GB 1516148 A GB1516148 A GB 1516148A GB 639367 A GB639367 A GB 639367A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitraniline
- acid
- sulphonic acid
- sulphonating
- sulphuric
- 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
- 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
- C07C201/08—Preparation of nitro compounds by substitution of hydrogen atoms by nitro groups
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
2 : 6-Dichloro- and 2 : 6-dibromo-4-nitraniline are manufactured by chlorinating or brominating p-nitraniline-o-sulphonic acid in aqueous acid (e.g. sulphuric or hydrochloric acid) solution in two stages, the first at such low temperature (e.g. 0-10 DEG C.) that the p-nitraniline-o-sulphonic acid is converted substantially into 6-chloro- or 6 - bromo - 4 - nitraniline - 2 - sulphonic acid, and the second at sufficiently high temperature (e.g. 50-60 DEG C.) to effect the replacement of the sulpho group by chlorine or bromine. Detailed examples are given. p-Nitraniline-o-sulphonic acid is obtainable by sulphonating p-nitraniline with concentrated sulphuric acid (in which case the sulphonation mixture, after dilution with water, may be directly subjected to the halogenation process), or by sulphonating p-nitrochlorobenzene with oleum and treating the resulting 5-nitro-2-chlorobenzenesulphonic acid with concentrated ammonia solution.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US639367XA | 1947-06-07 | 1947-06-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB639367A true GB639367A (en) | 1950-06-28 |
Family
ID=22052473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15161/48A Expired GB639367A (en) | 1947-06-07 | 1948-06-04 | Manufacture of halogenated amines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB639367A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0161650A1 (en) * | 1984-05-18 | 1985-11-21 | Hoechst Aktiengesellschaft | Process for preparing 2,6-dichloro-4-nitro-aniline |
-
1948
- 1948-06-04 GB GB15161/48A patent/GB639367A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0161650A1 (en) * | 1984-05-18 | 1985-11-21 | Hoechst Aktiengesellschaft | Process for preparing 2,6-dichloro-4-nitro-aniline |
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