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US 4,045,502 AGranted
Process for producing high purity para-chlorobenzotrifluoride
AssigneeOlin Corporation
InventorsSudhir K. Bhutani, Willard A. Nichols
Life of this patent
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Abstract
An improvement in the process for making para-chlorobenzotrifluoride by the fluorination of a mixture of the para- and meta- isomers of chlorobenzotrichloride wherein the fluorination reaction is stopped before the complete conversion of the para- and meta- isomers occurs so that the relative amount of meta- isomer of chlorobenzotrifluoride produced will be reduced.
Claims3
In a process for making para-chlorobenzotrifluoride wherein a mixture comprising meta- and para-chlorobenzotrichloride is reacted with hydrogen fluoride, the improvement which comprises
- terminating the fluorination reaction when no more than 99% by weight of said para-chlorobenzotrichloride has been converted to para-chlorobenzotrifluoride and no more than 50% by weight of said meta-chlorobenzotrichloride has been converted into meta-chlorobenzotrifluoride.
Dependencies are inferred from the claim text.