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.

公开(公告)号：US20220251030A1

公开(公告)日：2022-08-11

申请号：US17668830

申请日：2022-02-10

Applicant: Ascend Performance Materials Operations LLC

Inventor： Kyle Kissell ,  Basil Michaels

IPC: C07C253/34 ,  B01D3/10

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.

公开(公告)号：US20220064108A1

公开(公告)日：2022-03-03

申请号：US17466882

申请日：2021-09-03

Applicant: Ascend Performance Materials Operations LLC

Inventor： Kyle Kissell ,  Basil Michaels

IPC: C07C253/34 ,  B01D3/14

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.

公开(公告)号：US20220073451A1

公开(公告)日：2022-03-10

申请号：US17466880

申请日：2021-09-03

Applicant: Ascend Performance Materials Operations LLC

Inventor： Kyle Kissell ,  Basil Michaels

IPC: C07C253/34

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.

公开(公告)号：US20210403414A1

公开(公告)日：2021-12-30

申请号：US17363841

申请日：2021-06-30

Applicant: Ascend Performance Materials Operations LLC

Inventor： Huayun Yu ,  Zhensheng Ding ,  Nick Sparkman ,  Thomas Peavy ,  Ernst Bezemer ,  Kyle Kissell

IPC: C07C227/26 ,  C07C253/10 ,  C07C253/30

Abstract: Reaction pathways and conditions for the production of nitrogen-containing chelators, such as a glycine derivative, are described herein. In particular, the present disclosure describes a process for the production of a nitrile intermediate by reacting a tetra-amino compound with an aldehyde and a hydrogen cyanide to form the nitrile intermediate. The nitrile intermediate may then be further processed to produce the chelators at a high yield and/or a high purity.

公开(公告)号：US11111209B2

公开(公告)日：2021-09-07

申请号：US16682167

申请日：2019-11-13

Applicant: Ascend Performance Materials Operations LLC

Inventor： Basil Michael ,  Carl Alexander Diaz ,  Billy Nelson ,  Kyle Kissell

IPC: C07C253/34

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.

公开(公告)号：US11814337B2

公开(公告)日：2023-11-14

申请号：US17466882

申请日：2021-09-03

Applicant: Ascend Performance Materials Operations LLC

Inventor： Kyle Kissell ,  Basil Michaels

IPC: C07C253/34 ,  B01D3/14

CPC classification number: C07C253/34 ,  B01D3/143

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.

公开(公告)号：US20230008538A1

公开(公告)日：2023-01-12

申请号：US17854591

申请日：2022-06-30

Applicant: Ascend Performance Materials Operations LLC

Inventor： Huayun Yu ,  Zhensheng Ding ,  Ernst Bezemer ,  Kyle Kissell

IPC: C07C209/48 ,  C07C253/22

Abstract: Reaction pathways and conditions for the production of nitrogen-containing chelators, such as a glycine derivative, with reduction of ammonia byproducts. In particular, the present disclosure describes a process for the production of a nitrile intermediate by reacting a tetra-amino compound or dinitrile compound with an aldehyde and a hydrogen cyanide to form the nitrile intermediate. The nitrile intermediate may then be further processed to produce chelators at a high yield and/or a high purity.

公开(公告)号：US20210403412A1

公开(公告)日：2021-12-30

申请号：US17363770

申请日：2021-06-30

Applicant: Ascend Performance Materials Operations LLC

Inventor： Zhensheng Ding ,  Kyle Kissell ,  Scott G. Moffatt ,  Huayun Yu

IPC: C07C227/26 ,  C07C253/30

Abstract: Reaction pathways and conditions for the production of nitrogen-containing chelators, such as a glycine derivative, are described herein. In particular, the present disclosure describes a process for the production of a nitrile intermediate at a high yield and/or purity. This process includes reacting a dinitrile compound with an aldehyde and a hydrogen cyanide to form the nitrile intermediate. The nitrile intermediate may then be further processed to produce the chelators at a high yield and/or a high purity.

公开(公告)号：US11976025B2

公开(公告)日：2024-05-07

申请号：US17466880

申请日：2021-09-03

Applicant: Ascend Performance Materials Operations LLC

Inventor： Kyle Kissell ,  Basil Michaels

IPC: C07C253/34 ,  B01D3/14

CPC classification number: C07C253/34

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.