公开(公告)号：US20230192600A1

公开(公告)日：2023-06-22

申请号：US18068645

申请日：2022-12-20

Applicant: Ascend Performance Materials Operations LLC

Inventor： Pascal Bolomey ,  Kyle Kissell ,  Basil Michaels ,  Nick Sparkman ,  Zhensheng Ding

IPC: C07C253/34

CPC classification number: C07C253/34

Abstract: A process for producing acetonitrile, the process comprising dehydrating a feedstock stream comprising acetonitrile, acrylonitrile, allyl alcohol, and water (and optionally methanol) in a dehydration (first) column to yield a dehydrated acetonitrile stream comprising acetonitrile and acrylonitrile, less than 1 wt % allyl alcohol, and less than 50 wt % water, and optionally hydrogen cyanide; distilling the dehydrated acetonitrile stream in a lights (second) column to yield a distillate stream comprising lights, and a bottoms stream comprising acetonitrile, acrylonitrile, water, and optionally hydrogen cyanide and acrylonitrile; extracting the distillation bottoms stream in an extraction (third) column to yield a raffinate stream comprising acetonitrile and less than 200 ppm acrylonitrile and an extract stream comprising water and acrylonitrile; purifying the raffinate stream to yield a product acetonitrile stream.