Process for producing halogen-containing phosphate ester
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United States of America Patent
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Apr 3, 2001
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N/A
app pub date -
Jan 5, 2000
filing date -
Jul 27, 1998
priority date (Note) -
Expired
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Abstract
A process for producing a halogen-containing phosphate ester includes the steps of: (i) reacting a phosphorus halide selected from the group consisting of phosphorus oxyhalides and phosphorus pentahalides with a halogen-containing hydroxy compound to obtain a reaction mixture including a halogen-containing phosphate ester, (ii) purifying the halogen-containing phosphate ester by adding an aqueous medium selected from the group consisting of water, neutral aqueous solutions, acidic aqueous solutions and basic aqueous solutions to the reaction mixture to crystallize the halogen-containing phosphate ester, and (iii) distilling waste water from the purification step.
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