Separation/purification of desflurane from hydrogen fluoride
AssigneeHalocarbon Products Corporation
InventorsPaul Mazzell, Barry Jones, Neville Pavri, Joel Swinson
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Abstract
An azeotrope comprising desflurane (CF3CFHOCF2H) and hydrogen fluoride (HF). The azeotrope can be prepared by fractionally distilling a crude mixture of desflurane and HF. Purer desflurane can be readily and easily separated from the azeotrope. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader quickly to ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the appended issued claims.
Claims26
An isolated and purified azeotrope comprising desflurane (CF3CFHOCF2H) and hydrogen fluoride.
A process for producing desflurane (CF3CFHOCF2H), said process comprising the following steps:
- a) conducting a reaction that produces a crude mixture comprising desflurane, unreacted isoflurane, HCl and hydrogen fluoride;
- b) fractionally distilling from said crude mixture HCl and, thereafter, an azeotrope comprising desflurane and hydrogen fluoride;
- and
- c) separating purer desflurane from said azeotrope.
Dependencies are inferred from the claim text.