GB641520A - Improvements in recovery of chlorobenzene - Google Patents
Improvements in recovery of chlorobenzeneInfo
- Publication number
- GB641520A GB641520A GB13238/48A GB1323848A GB641520A GB 641520 A GB641520 A GB 641520A GB 13238/48 A GB13238/48 A GB 13238/48A GB 1323848 A GB1323848 A GB 1323848A GB 641520 A GB641520 A GB 641520A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- mixture
- alkali metal
- water
- sulphuric acid
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/395—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to a chemical modification of at least one compound
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Chlorobenzene is obtained from an alkali metal salt of p-chlorobenzene-sulphonic acid by continuously boiling a mixture comprising an alkali metal salt of p-chlorobenzenesulphonic acid, sulphuric acid and water at a temperature below 240 DEG C., continuously removing vapours of water and chlorobenzene distilling from the boiling mixture, adding to said mixture during boiling an alkali metal salt of p-chlorobenzenesulphonic acid, adding sulphuric acid and water to the mixture in amount sufficient to maintain the boiling point of the mixture below 240 DEG C., the amount of sulphuric acid added being such that there forms below said mixture an inorganic layer comprising alkali metal acid sulphate, sulphuric acid and water, and withdrawing the aqueous inorganic layer so formed at a rate equal to that at which it is formed. The amount of sulphuric acid added is preferably such that the aqueous inorganic layer comprises 68-72 per cent of sodium acid sulphate, 23-27 per cent of sulphuric acid and 4-6 per cent of water. The alkali metal salt of p-chlorobenzenesulphonic acid used may be the crude product obtained as a by-product during the manufacture of 2,2-bis-(p-chlorophenyl)-1,1,1-trichloroethane. Specification 641,041 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA641520X | 1947-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB641520A true GB641520A (en) | 1950-08-16 |
Family
ID=4172039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13238/48A Expired GB641520A (en) | 1947-06-12 | 1948-05-14 | Improvements in recovery of chlorobenzene |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB641520A (en) |
-
1948
- 1948-05-14 GB GB13238/48A patent/GB641520A/en not_active Expired
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