Octafluoropentaerythrityltetramine (octafluoro-peta) and process for its preparation

A method for manufacturing octafluoropentaerythrityltetramine (octafluoro-PETA), comprising:

• basifying pentaerythrityltetramine tetrahydrochloride in an aqueous solution with an aqueous alkali and treating with alkyl chloroformate for producing a tetraalkyl pentaerythrityltetracarbamate;
• extracting said compound into a nonaqueous solvent suitable for extraction from water and removing said solvent for providing a pure form of tetraalkyl pentaerythrityltetracarbamate;
• bubbling elemental fluorine and/or mixtures of fluorine with an inert gas through said tetraalkyl pentaerythrityltetracarbamate in a solvent suitable for direct fluorinations of protected amines until excess fluorine appears;
• and
• purifying the resultant octafluoropentaerythrityltetramine.

A method for manufacturing octafluoropentaerythrityltetramine (octafluoro-PETA), comprising:

• basifying pentaerythrityltetramine tetrahydrochloride in an aqueous solution with an aqueous alkali and treating with alkyl chloroformate for producing a tetraalkyl pentaerythrityltetracarbamate;
• extracting said compound into a nonaqueous solvent suitable for extraction from water and removing said solvent for providing a pure form of tetraalkyl pentaerythrityltetracarbamate;
• bubbling elemental fluorine and/or mixtures of fluorine with an inert gas through said tetraalkyl pentaerythrityltetracarbamate in a solvent suitable for direct fluorinations of protected amines until excess fluorine appears;
• and
• purifying the resultant octafluoropentaerythrityltetramine, wherein said N,N-dihaloamine explosive comprises octafluoropentaerythrityltetramine.

A method of producing a biocide, comprising:

• basifying pentaerythrityltetramine tetrahydrochloride in an aqueous solution with an aqueous alkali and treating with alkyl chloroformate for producing a tetraalkyl pentaerythrityltetracarbamate;
• extracting said compound into a nonaqueous solvent suitable for extraction from water and removing said solvent for providing a pure form of tetraalkyl pentaerythrityltetracarbamate;
• bubbling elemental fluorine and/or mixtures of fluorine with an inert gas through said tetraalkyl pentaerythrityltetracarbamate in a solvent suitable for direct fluorinations of protected amines until excess fluorine appears;
• and
• purifying the resultant octafluoropentaerythrityltetramine, wherein said N,N-dihaloamine explosive comprises octafluoropentaerythrityltetramine.