GB719601A - Dehydrochlorination of polychlorocyclohexanes - Google Patents
Dehydrochlorination of polychlorocyclohexanesInfo
- Publication number
- GB719601A GB719601A GB25835/52A GB2583552A GB719601A GB 719601 A GB719601 A GB 719601A GB 25835/52 A GB25835/52 A GB 25835/52A GB 2583552 A GB2583552 A GB 2583552A GB 719601 A GB719601 A GB 719601A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anion exchange
- exchange resin
- hexachloride
- dehydrochlorination
- per cent
- 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
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/25—Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Polychlorocyclohexanes such as benzene hexachloride are dehydrochlorinated to give mixtures of isomeric polychlorobenzenes by contacting the polychlorocyclohexane at an elevated temperature, e.g. 180 DEG -350 DEG C. with an anion exchange resin. Preferably the reaction is carried out at 220 DEG -250 DEG C. in the presence of 0.01 per cent to 4 per cent of the resin. Many types of anion exchange resin are specified. Dehydrochlorination of benzene hexachloride according to the invention produces 1 : 2 : 4- and 1 : 2 : 3-trichlorobenzene. In an example benzene hexachloride is heated at 250-270 DEG C. in the presence of an "Amberlite" (Registered Trade Mark) anion exchange resin to give trichlorobenzenes; similarly dehydrochlorination of monochlorobenzene hexachloride and dichlorobenzene hexachloride gives tetrachlorobenzene and pentachlorobenzene respectively. A comparative experiment using powdered iron as a catalyst in place of an anion exchange resin is described.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US719601XA | 1952-01-30 | 1952-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB719601A true GB719601A (en) | 1954-12-01 |
Family
ID=22104680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB25835/52A Expired GB719601A (en) | 1952-01-30 | 1952-10-15 | Dehydrochlorination of polychlorocyclohexanes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB719601A (en) |
-
1952
- 1952-10-15 GB GB25835/52A patent/GB719601A/en not_active Expired
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