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.
