Abstract
The hydrolysis reactions of monoalkyl phosphate (MAP) and dialkyl phosphate (DAP) at high temperature were studied. The mono-anion of MAP was readily hydrolyzed at high temperature but the di-anion of MAP and anion of DAP to only a limited extent. The hydrolysis of sodium sesqui-n-octyl phosphate (SAP-08) at various degrees of neutralization (DN), a compound synthesized from the phosphorylation of octyl alcohol with phosphorus pentoxide, was studied in 48% aqueous solution at 145°C for 7 h. Under neutral conditions, the hydrolysis of SAP gave high purity dialkyl phosphate. The dianion of P, P'-dialkyl pyrophosphate (Py-1, 1) was found to be hardly hydrolyzed under neutral conditions while the pyrophosphate bond was readily so under acidic conditions.Extension to industrial production method of high purity DAP is also discussed.
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