EP0074069A1
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Process for preparing chlorotrifluoromethylbenzene
Assignee: Daikin Industries Ltd
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Filing: 1982-09-01
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Granted: —
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Expires: 2002-09-01
Abstract
Abstract Chlorotrifluoromethylbenzene is prepared with a good yield by reacting chlorotoluene, hydrogen fluoride and chlorine in a gaseous phase in the presence of a catalyst selected from the group consisting of a-aluminum fluoride, α-aluminum fluoride carrying one or more salts of iron, bismuth, tin and lead, and chromium (III) oxide or partially fluorinated chromium (III) oxide carrying alkali metal fluoride.
Inventors
- 👤 Yohnosuke Ohsaka
- 👤 Heikitsu Sonoyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 11:28
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/12; C; C07; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
56 words
A process for preparing chlorotrifluoromethylbenzene which comprises reacting chlorotoluene, hydrogen fluoride and chlorine in a gaseous phase in the presence of a catalyst selected from the group consisting of a-aluminum fluoride, a-aluminum fluoride carrying one or more salts of iron, bismuth, tin and lead, and chromium(III) oxide or partially fluorinated chromium(III) oxide carrying alkali metal fluoride.
Claim 2
Dependent Claim
56 words
A process for preparing chlorotrifluoromethylbenzene which comprises reacting chlorotoluene, hydrogen fluoride and chlorine in a gaseous phase in the presence of a catalyst selected from the group consisting of a-aluminum fluoride, a-aluminum fluoride carrying one or more salts of iron, bismuth, tin and lead, and chromium(III) oxide or partially fluorinated chromium(III) oxide carrying alkali metal fluoride.
Claim 3
Dependent Claim
12 words
The process according to claim 1, wherein the catalyst is a-aluminum fluoride.
Claim 4
Dependent Claim
23 words
The process according to claim 1, wherein the catalyst is a-aluminum fluoride carrying one or more salts of iron, bismuth, tin and lead.
Claim 5
Dependent Claim
48 words
The process according to claim 3, wherein the amount of the salt carried on 100 g of -aluminum fluoride is from 0.0005 to 0.05 mole in case of the salt of bismuth or from 0.001 to 0.1 mole in case of the salt of iron, tin or lead.
Claim 6
Dependent Claim
21 words
The process according to claim 1, wherein the catalyst is chromium(III) oxide or partially fluorinated chromium(III) oxide carrying alkali metal fluoride.
Claim 7
Dependent Claim
31 words
The process according to claim 5, wherein the amount of alkali metal fluoride carried on 100 g of chromium(III) oxide or partially fluorinated chromium(III) oxide is from 0.01 to 0.5 mole.
Claim 8
Dependent Claim
20 words
The process according to claim 1, wherein the reaction temperature is from 250 to 450°C, preferably from 350 to 450°C.
Claim 9
Dependent Claim
16 words
The process according to claim 1, wherein the reaction pressure is from 0.5 to 10 atm.
Claim 10
Dependent Claim
25 words
The process according to claim 1, wherein the molar ratio of hydrogen fluoride to chlorotoluene is from 3:1 to 20:1, preferably from 4:1 to 20:1.
Claim 11
Dependent Claim
24 words
The process according to claim 1, wherein the molar ratio of chlorine to chlorotoluene is from 3:1 to 20:1, preferably from 4:1 to 15:1.
References Cited (Backward Citations)
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