Patent ID: 9266849
Filing Date: 2016-02-23
CPC Classification: C07D

Claim Text:
1. A process for recovering a divinylarene dioxide from a crude feed stream comprising (i) lights from 0.1 wt % to 75 wt %; (ii) monoepoxide(s) from 1 wt % to 30 wt %; (iii) divinylarene dioxide from 10 wt % to 98 wt %; and (iv) heavies from 0.1 wt % to 5 wt %; the process comprising the steps of: (a) providing the continuous crude feed stream to a separator (b) separating/recovering the divinylarene dioxide product from the other compounds of the crude feed stream; wherein the separation step (b) is one distillation step or a combination of two or more distillation steps; or one evaporator step or a combination of two or more evaporation steps; and wherein the wall temperature of the distillation step or evaporation step is controlled at a temperature of less than 200° C.; wherein the residence time is less than 5 minutes; wherein the liquid phase turbulence as defined by Reynolds number is greater than 2000; wherein the liquid phase flux is greater than 240 lb/sq-ft/hr; wherein the heavies is less than 60 weight percent; and wherein the distillation and evaporation is operated at a reflux ratio between 0.01 and 20; and (c) recycling the other compounds recovered from the feed stream back into step (a); wherein the percent recovery of the divinylarene dioxide product recovered comprises greater than about 85 percent; and wherein the percent purity of the divinylarene dioxide product recovered comprises greater than about 85 percent.