GB723592A - Process for producing meta-dichlorobenzene - Google Patents
Process for producing meta-dichlorobenzeneInfo
- Publication number
- GB723592A GB723592A GB20105/52A GB2010552A GB723592A GB 723592 A GB723592 A GB 723592A GB 20105/52 A GB20105/52 A GB 20105/52A GB 2010552 A GB2010552 A GB 2010552A GB 723592 A GB723592 A GB 723592A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dichlorobenzene
- weight
- dichlorobenzenes
- mixture
- aluminium chloride
- 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
- C07C17/35—Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or of halogen atoms in the reaction
- C07C17/358—Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or of halogen atoms in the reaction by isomerisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A process for producing meta-dichlorobenzene isomerically from o-dichlorobenzene, or p-dichlorobenzene or a mixture of dichlorobenzenes containing less than 55 per cent by weight of m-dichlorobenzene comprises heating such dichlorobenzene or mixture of dichlorobenzenes under substantially anhydrous conditions to a temperature above the respective normal boiling point and at a superatmospheric pressure in the presence of at least 1 part by weight of anhydrous aluminium chloride per 100 parts by weight of the dichlorobenzene or mixture of dichlorobenzenes. In a modified process water is present in an amount not in excess of 10 per cent by weight based on the weight of the anhydrous aluminium chloride. In examples: a mixture of o, m and p-dichlorobenzenes is obtained by heating o-dichlorobenzene containing minor amounts of the other isomers in a seated tube with aluminium chloride, adding water to hydrolyse the latter and steam distilling the product (1); p-dichlorobenzene is employed as starting material in a similar process (2); similar processes are carried out using various amounts of aluminium chloride (3) and various temperatures (4), whilst (4) is repeated using p-dichlorobenzene as starting material (5). For comparison other runs are carried out at lower temperatures. Specification 699,153 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US723592XA | 1951-10-04 | 1951-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB723592A true GB723592A (en) | 1955-02-09 |
Family
ID=22107073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20105/52A Expired GB723592A (en) | 1951-10-04 | 1952-08-11 | Process for producing meta-dichlorobenzene |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE513656A (en) |
| DE (1) | DE926185C (en) |
| FR (1) | FR1061506A (en) |
| GB (1) | GB723592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997045389A1 (en) * | 1996-05-28 | 1997-12-04 | Occidental Chemical Corporation | Method of making 1,2,4-trichlorobenzene |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2486068A1 (en) * | 1980-07-01 | 1982-01-08 | Rhone Poulenc Ind | Inter-conversion of poly:chlorobenzene cpds. - by contact with alkali metal base and complexing agent |
| FR2505817A1 (en) * | 1981-05-12 | 1982-11-19 | Rhone Poulenc Spec Chim | Inter-conversion of poly:chlorobenzene cpds. - by contact with alkali metal base and complexing agent |
| DE3160950D1 (en) * | 1980-07-01 | 1983-10-27 | Rhone Poulenc Spec Chim | Process for the isomerization and/or rearrangement of polychlorobenzenes |
-
0
- BE BE513656D patent/BE513656A/xx unknown
-
1952
- 1952-08-11 GB GB20105/52A patent/GB723592A/en not_active Expired
- 1952-08-12 DE DEU1804A patent/DE926185C/en not_active Expired
- 1952-08-19 FR FR1061506D patent/FR1061506A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997045389A1 (en) * | 1996-05-28 | 1997-12-04 | Occidental Chemical Corporation | Method of making 1,2,4-trichlorobenzene |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1061506A (en) | 1954-04-13 |
| BE513656A (en) | |
| DE926185C (en) | 1955-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB627773A (en) | Improvements in or relating to the production of organic fluorine compounds | |
| GB723592A (en) | Process for producing meta-dichlorobenzene | |
| GB1010352A (en) | Process for preparing halogenated hydrocarbons | |
| GB699153A (en) | Improvements in or relating to the manufacture of meta-dichlorobenzene | |
| GB952805A (en) | Process for the production of isocyanide dichloride derivatives | |
| US2343107A (en) | Preparation of butadiene | |
| GB893289A (en) | Preparation of tetrafluorothylene | |
| GB792542A (en) | Dichlorobenzene manufacture | |
| GB801408A (en) | Improvements in or relating to the preparation of fluorocarbon compounds | |
| US2957033A (en) | Production of carbon tetrachloride and perchlorethylene | |
| US2725406A (en) | Dehydrochlorination | |
| GB765527A (en) | New fluorinated anisoles and process for the manufacture thereof | |
| GB569097A (en) | Production of 2-chlorobutadiene-1:3 | |
| GB704304A (en) | Improvements in and relating to the preparation of phenyltrichlorosilane | |
| GB798027A (en) | Process for the production of dichlorbutenes | |
| SU130502A1 (en) | The method of obtaining anhydrous ethylene chlorohydrin | |
| GB580140A (en) | Improvements in or relating to the production of fluorinated organic compounds | |
| US2352782A (en) | Trimethylene chlorbromide | |
| GB388818A (en) | Process of producing chlorinated derivatives of benzene | |
| GB575756A (en) | Production of halo-fluoro derivatives of aliphatic hydrocarbons | |
| GB597993A (en) | Improvements in or relating to the production of beta-trichloroethane | |
| GB794948A (en) | Production of 1,2,3,4,7,7-hexachlorobicyclo(2.2.1)-2,5-heptadiene | |
| GB567289A (en) | Improvements in or relating to the production of trichloracetonitrile | |
| GB776113A (en) | Improvements in or relating to the production of beta-hydroxy-ethyl-hydrazine | |
| GB684117A (en) | Process for the hydrofluorination of halogenated ethylenes |