Patent ID: 8629305
Filing Date: 2014-01-14
Classification: B01D,C07C

Abstract:
1. A process for recovering dichlorohydrin(s) from a mixture comprising dichlorohydrin(s), one or more compounds selected from ester(s) of chlorohydrin(s), monochlorohydrin(s), and multihydroxylated-aliphatic hydrocarbon compound(s) and/or ester(s) thereof; water; and optionally one or more substances comprising chlorinating agent(s), catalyst(s), ester(s) of catalyst(s), and/or heavy byproduct(s), wherein the process comprises: (a) providing a liquid phase mixture obtained from a hydrochlorination reaction comprising dichlorohydrin(s), one or more compounds selected from ester(s) of chlorohydrin(s), monochlorohydrin(s), and multihydroxylated-aliphatic hydrocarbon compound(s) and/or ester(s) thereof; water, wherein the water present in the mixture is water produced in the hydrochlorination reaction, water present in the starting materials for the hydrochlorination reaction, or water introduced as a stripping agent; an optionally one or more substances comprising chlorinating agent(s), catalyst(s), ester(s) of catalyst(s), and/or heavy byproduct(s); (b) distilling or fractionating the mixture of step (a) in one or more unit operations to separate a vapor phase comprising dichlorohydrin(s), water and other lower boiling components, from the mixture of step (a); (c) condensing the vapor phase fraction of step (b) to form a liquid aqueous phase and a liquid organic phase comprising dichlorohydrin(s); (d) separating the liquid aqueous phase of step (c) from the liquid organic phase of step (c); and (e) recycling at least some of the liquid aqueous phase of step (d) to step (b),