Patent ID: 8864950
Filing Date: 2014-10-21
Classification: B01D,C07C,Y02P

Abstract:
1. A process for producing an acrylate product, the process comprising the steps of: (a) providing a crude product stream comprising: acrylate product comprising from 5 wt % to 50 wt % acrylic acid; from 0.5 wt % to 50 wt % of at least one alkylenating agent comprising formaldehyde and/or precursors thereof; from 5 wt % to 50 wt % acetic acid; and from 1 wt % to 60 wt % water; (b) separating at least a portion of the crude product stream to form an alkylenating agent stream comprising at least 1 wt % alkylenating agent, and an intermediate acrylate product stream comprising acrylate product, and (c) separating the intermediate product stream to form a finished acrylate product stream comprising at least 85 wt % acrylic acid, wherein step (b) is performed in at least one column having an operating pressure ranging from 40 kPa to 80 kPa.