Water retrieval from aqueous mixture of organic phosphates
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United States of America Patent
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Dec 30, 1997
Grant Date -
N/A
app pub date -
Mar 27, 1995
filing date -
Mar 27, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process and apparatus for separating aryl phosphates and esters and hydrolysates thereof from water in an aqueous mixture thereof. A superposed layer of the mixture is decanted from a lower layer of the phosphates, esters and hydrolysates. The superposed layer is filtered with a filter having a pore size of between 1 micron and 25 microns to remove globules and solid particles. The effluent is then subjected to demineralization with an anion exchange resin to remove most of the hydrolysates. Thereafter a sorber composed of an organic polymeric material such as polypropylene removes any remaining phosphates and esters down to less than 250 ppb.
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