Patent ID: 7196213

Claim:
A process for producing a phosphate, comprising the following steps 1, 2 and 3: step 1: the step of reacting an organic hydroxy compound represented by the following general formula (I) with at least one phosphorylating agent selected from the group consisting of orthophosphoric acid, phosphorus pentaoxide, and polyphosphoric acid: R 1 —O—(AO) n —H (I) wherein R 1 represents a straight or branched alkyl group or alkenyl group having 6 to 36 carbon atoms, AO represents an oxyalkylene group having 2 to 4 carbon atoms and n is a number of 0.1 to 100 on the average; step 2: the step of purifying the reaction product obtained in the step 1 until the content of the organic hydroxy compound that has not yet reacted becomes 2% or less by weight; and step 3: the step of adding water to the purified product obtained in the step 2 at such a ratio that the content of water in the final product is from 0.5 to 30% by weight.