Abstract: Provided herein are processes for the separation of acetonitrile from low-purity feedstock streams. The provided processes are particularly useful for isolating acetonitrile at high purity from chemical manufacturing waste streams that include methanol, water, and allyl alcohol.

Abstract: A process for producing acetonitrile, the process comprising: treating a feedstock stream comprising methanol, allyl alcohol, oxazole, acetonitrile, water, and hydrogen cyanide to remove hydrogen cyanide and produce an acetonitrile stream comprising less than 1 wt. % hydrogen cyanide. The process further comprises the step of distilling the acetonitrile stream in a first distillation column to produce a first distillate comprising oxazole and methanol; a first intermediate acetonitrile stream comprising acetonitrile and oxazole and less than 1 wt % allyl alcohol; a first bottoms stream comprising allyl alcohol and water. The process further comprises the step of purifying the first intermediate acetonitrile stream to produce an acetonitrile product stream and a recycle stream comprising allyl alcohol.

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.

Abstract: Provided herein are processes for the separation of acetonitrile from low-purity feedstock streams. The provided processes are particularly useful for isolating acetonitrile at high purity from chemical manufacturing waste streams that include methanol, water, and allyl alcohol.

Abstract: Provided herein are processes for the separation of acetonitrile from low-purity feedstock streams. The provided processes are particularly useful for isolating acetonitrile at high purity from chemical manufacturing waste streams that include methanol, water, and allyl alcohol.

Abstract: A process for producing acetonitrile, the process comprising: treating a feedstock stream comprising methanol, allyl alcohol, oxazole, acetonitrile, water, and hydrogen cyanide to remove hydrogen cyanide and produce an acetonitrile stream comprising less than 1 wt. % hydrogen cyanide. The process further comprises the step of distilling the acetonitrile stream in a first distillation column to produce a first distillate comprising oxazole and methanol; a first intermediate acetonitrile stream comprising acetonitrile and oxazole and less than 1 wt % allyl alcohol; a first bottoms stream comprising allyl alcohol and water. The process further comprises the step of purifying the first intermediate acetonitrile stream to produce an acetonitrile product stream and a recycle stream comprising allyl alcohol.

Abstract: A process for producing a high-purity acetonitrile product from a low-purity acetonitrile feedstock streams. In particular, the present disclosure relates to a process for producing a sales-grade, high purity acetonitrile by (a) distilling the feedstock stream in a to yield a crude acetonitrile stream, (b) treating the crude acetonitrile stream to produce an intermediate acetonitrile stream, (c) purifying the intermediate acetonitrile stream in a pressure swing distillation system to produce a recycle stream and an acetonitrile product stream, (d) recycling the recycle stream to the first distillation column, and (e) distilling the acetonitrile product stream to yield a purified acetonitrile product stream of at least 98 wt. % acetonitrile.

Abstract: A process for producing a high-purity acetonitrile product from a low-purity acetonitrile feedstock streams. In particular, the present disclosure relates to a process for producing a sales-grade, high purity acetonitrile by (a) distilling the feedstock stream in a to yield a crude acetonitrile stream, (b) treating the crude acetonitrile stream to produce an intermediate acetonitrile stream, (c) purifying the intermediate acetonitrile stream in a pressure swing distillation system to produce a recycle stream and an acetonitrile product stream, (d) recycling the recycle stream to the first distillation column, and (e) distilling the acetonitrile product stream to yield a purified acetonitrile product stream of at least 98 wt. % acetonitrile.

Abstract: Described herein are methods for removing an iodine stain from a surface. In one embodiment, the method comprises contacting an iodine-stained surface with ascorbic acid for a period of time sufficient to remove the iodine stain from the surface, thereby removing the iodine stain from the surface.

Abstract: Described herein are methods for removing an iodine stain from a surface. In one embodiment, the method comprises contacting an iodine-stained surface with ascorbic acid for a period of time sufficient to remove the iodine stain from the surface, thereby removing the iodine stain from the surface.