Saturated　vapor　pressures　of　Lyral　were　measured　in　the　temperature　range　of　391.85~416.35　K　by　static　method　in　a　Rose　still.　The　measured　Lyral　saturated　vapor　pressures　and　temperatures　were　correlated　by　Antoine　equation　lnP=A　B/(T+C),　and　the　constants　of　the　equation　were　determined　as　A=10.701,　B=558.048,　C=296.730.　The　average　deviations　between　the　Lyral　saturated　vapor　pressures　calculated　from　the　above　correlated　equation　and　experimental　data　are　less　than　1%,　this　indicates　that　the　correlated　values　of　Lyral　saturated　vapor　pressures　agree　well　with　the　measured　ones.　The　obtained　parameters　are　useful　for　the　design　and　operation　of　the　Lyral　rectifying　tower.