GB589465A - Improvements in or relating to the production of aryl derivaties of trichloroethane - Google Patents
Improvements in or relating to the production of aryl derivaties of trichloroethaneInfo
- Publication number
- GB589465A GB589465A GB7101/45A GB710145A GB589465A GB 589465 A GB589465 A GB 589465A GB 7101/45 A GB7101/45 A GB 7101/45A GB 710145 A GB710145 A GB 710145A GB 589465 A GB589465 A GB 589465A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chloral
- compound
- sulphuric acid
- reaction
- aryl
- 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
- C07C17/26—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton
- C07C17/263—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions
- C07C17/2637—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions between a compound containing only oxygen and possibly halogen as hetero-atoms and a halogenated hydrocarbon
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/26—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton
- C07C17/263—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Trichloromethyldiarylmethanes are prepared by the condensation of chloral or a compound yielding chloral in the presence of sulphuric acid and an aryl compound of the benzene series having replacable nuclear hydrogen characterised in that a liquid mixture of the chloral or chloral yielding compound and the aryl compound is emulsified in sulphuric acid of strength of at least 95 per cent and not more than 98 per cent, and that the strength of the acid is maintained within this range throughout the reaction by the addition of sulphur trioxide or oleum. It is preferred to cool the reaction mixture to prevent excessive sulphonation of chlorbenzene. The product may be recovered in any suitable manner such as that described in Specification 589,466. It is particularly preferred to exclude the formation of solids in the course of the reaction and to avoid this, solvents such as lower aliphatic or aromatic hydrocarbons and chlorinated hydrocarbon solvents are added. In examples, chloral and chlorobenzene are reacted in the presence of sulphuric acid of strengths within the range indicated above.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US589465XA | 1944-03-21 | 1944-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB589465A true GB589465A (en) | 1947-06-20 |
Family
ID=22019877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7101/45A Expired GB589465A (en) | 1944-03-21 | 1945-03-21 | Improvements in or relating to the production of aryl derivaties of trichloroethane |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB589465A (en) |
-
1945
- 1945-03-21 GB GB7101/45A patent/GB589465A/en not_active Expired
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