Image restoration by the method of convex projections

A process for continuously producing epichlorohydrin which comprises reacting chlorine and allyl chloride in an aqueous medium, neutralizing and saponifying the resulting hydrochloric acid-acidified solution containing glycerol dichlorohydrin with an alkali to form a solution containing epichlorohydrin, and separating epichlorohydrin from the resulting solution; wherein (1) THE NEUTRALIZATION AND SAPONIFICATION ARE PERFORMED IN SEPARATELY PROVIDED NEUTRALIZATION AND SAPONIFICATION ZONES, (2) A SLURRY CONTAINING MAINLY CALCIUM CARBONATE AND CALCIUM HYDROXIDE IS SEPARATED FROM THE RESIDUAL SLURRY LEFT AFTER THE SEPARATION OF EPICHLOROHYDRIN, AND (3) THE NEUTRALIZATION AND SAPONIFICATION REACTIONS ARE CARRIED OUT WHILE RECYCLING THE SEPARATED SLURRY CONTAINING CALCIUM CARBONATE AND CALCIUM HYDROXIDE INTO THE NEUTRALIZATION ZONE.