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US 4,046,804 AGranted
Process for preparing a novel benzylamine hydrate
AssigneeMerck & Co., Inc.
InventorsEdward M. Cohen, Earl R. Oberholtzer
Life of this patent
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Abstract
.alpha.,.alpha.-Dimethyl-4-(.alpha.,.alpha.,.beta.,.beta.-tetrafluorophenet hyl)benzylamine isethionate monohydrate and processes for its preparation are disclosed.
Claims3
A process for preparing .alpha.,.alpha.-dimethyl-4-(.alpha.,.alpha.,.beta.,.beta.-tetrafluorophene thyl)benzylamine isethionate monohydrate which comprises
- a. preparing an aqueous solution containing less than 10% by weight of .alpha.,.alpha.-dimethyl-4-(.alpha.,.alpha.,.beta.,.beta.-tetrafluorophene thyl)benzylamine isethionate,
- b. freezing said solution,
- c. thawing said frozen solution at a temperature of about 5.degree. C. and
- d. separating therefrom .alpha.,.alpha.-dimethyl-4-(.alpha.,.alpha.,.beta.,.beta.-tetrafluorophene thyl)benzylamine isethionate monohydrate which precipitates.
1 more element
Dependencies are inferred from the claim text.