公开(公告)号：US20200216379A1

公开(公告)日：2020-07-09

申请号：US16724534

申请日：2019-12-23

Applicant: Monsanto Technology LLC

Inventor： John H. Ahn ,  Don Probst ,  Kam-To Wan ,  John Wang

IPC: C07C51/367 ,  C07C37/00 ,  C07C39/30 ,  C07C51/16 ,  C07C51/00

Abstract: Processes for producing 2,5-dichlorophenol and 3,6-dichloro-2-methoxybenzoic acid are described. Various processes for isomerizing 2,4-dichlorophenol over a zeolite catalyst to form 2,5-dichlorophenol are provided. Processes for preparing 2,5-dichlorophenol including hydroxylating 1,4-dichlorobenzene are also described. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.

公开(公告)号：US20180282258A1

公开(公告)日：2018-10-04

申请号：US15761986

申请日：2016-09-30

Applicant: Monsanto Technology LLC

Inventor： John H. Ahn ,  Kam-To Wan

IPC: C07C209/36 ,  C07C231/02 ,  B01J21/18 ,  B01J23/42

CPC classification number: C07C209/365 ,  B01J21/18 ,  B01J23/42 ,  B01J23/89 ,  B01J35/0013 ,  C07C37/045 ,  C07C231/02 ,  C07C245/20 ,  C07C211/52 ,  C07C39/30

Abstract: The present invention generally relates to processes for the catalytic hydrogenation of halonitroaromatics. In particular, the present invention includes processes for the catalytic hydrogenation of halonitroaromatics such as 2,5-dicloronitrobenzene to 2,5-dichloroaniline over a platinum-containing catalyst. The present invention also relates to processes for producing 3, 6-dichloro-2-methoxybenzoic acid.

公开(公告)号：US11820725B2

公开(公告)日：2023-11-21

申请号：US17545250

申请日：2021-12-08

Applicant: Monsanto Technology LLC

Inventor： John H. Ahn ,  Kam-To Wan

IPC: C07C245/20 ,  C07C209/36 ,  B01J21/18 ,  B01J23/42 ,  B01J23/89 ,  C07C37/045 ,  B01J35/00 ,  C07C231/02

CPC classification number: C07C209/365 ,  B01J21/18 ,  B01J23/42 ,  B01J23/89 ,  B01J35/0013 ,  C07C37/045 ,  C07C231/02 ,  C07C245/20 ,  C07C209/365 ,  C07C211/52 ,  C07C37/045 ,  C07C39/30

Abstract: The present invention generally relates to processes for the catalytic hydrogenation of halonitroaromatics. In particular, the present invention includes processes for the catalytic hydrogenation of halonitroaromatics such as 2,5-dicloronitrobenzene to 2,5-dichloroaniline over a platinum-containing catalyst. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.

公开(公告)号：US10550063B2

公开(公告)日：2020-02-04

申请号：US15516105

申请日：2015-10-02

Applicant: Monsanto Technology LLC

Inventor： Kam-To Wan ,  John H. Ahn ,  John Wang ,  Don Probst

IPC: C07C51/367 ,  C07C37/00 ,  C07C51/00

Abstract: Processes for producing 2,5-dichlorophenol and 3,6-dichloro-2-methoxybenzoic acid are described. Various processes for isomerizing 2,4-dichlorophenol over a zeolite catalyst to form 2,5-dichlorophenol are provided. Processes for preparing 2,5-dichlorophenol including hydroxylating 1,4-dichlorobenzene are also described. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.

公开(公告)号：US20160068555A1

公开(公告)日：2016-03-10

申请号：US14848501

申请日：2015-09-09

Applicant: Monsanto Technology LLC

Inventor： Kam-To Wan

IPC: C07F9/38 ,  B01J23/89 ,  B01J23/62 ,  B01J21/18

CPC classification number: C07F9/3813 ,  B01J21/18 ,  B01J23/42 ,  B01J23/626 ,  B01J23/70 ,  B01J23/74 ,  B01J23/745 ,  B01J23/75 ,  B01J23/8906 ,  B01J23/8913 ,  B01J23/8926

Abstract: Generally, the present invention relates to improvements in metal utilization in supported, metal-containing catalysts. For example, the present invention relates to methods for directing and/or controlling metal deposition onto surfaces of porous substrates. The present invention also relates to methods for preparing catalysts in which a first metal is deposited onto a support (e.g., a porous carbon support) to provide one or more regions of a first metal at the surface of the support, and a second metal is deposited at the surface of the one or more regions of the first metal. Generally, the electropositivity of the first metal (e.g., copper or iron) is greater than the electropositivity of the second metal (e.g., a noble metal such as platinum) and the second metal is deposited at the surface of the one or more regions of the first metal by displacement of the first metal. The present invention further relates to treated substrates, catalyst precursor structures and catalysts prepared by these methods. The invention further relates to use of catalysts prepared as detailed herein in catalytic oxidation reactions, such as oxidation of a substrate selected from the group consisting of N-(phosphonomethyl)iminodiacetic acid or a salt thereof, formaldehyde, and/or formic acid.

公开(公告)号：US11225454B2

公开(公告)日：2022-01-18

申请号：US16744323

申请日：2020-01-16

Applicant: Monsanto Technology LLC

Inventor： John H. Ahn ,  Kam-To Wan

IPC: C07C209/36 ,  B01J21/18 ,  B01J23/42 ,  B01J23/89 ,  C07C37/045 ,  B01J35/00 ,  C07C245/20 ,  C07C231/02

Abstract: The present invention generally relates to processes for the catalytic hydrogenation of halonitroaromatics. In particular, the present invention includes processes for the catalytic hydrogenation of halonitroaromatics such as 2,5-dicloronitrobenzene to 2,5-dichloroaniline over a platinum-containing catalyst. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.

公开(公告)号：US20220098141A1

公开(公告)日：2022-03-31

申请号：US17545250

申请日：2021-12-08

Applicant: Monsanto Technology LLC

Inventor： John H. Ahn ,  Kam-To Wan

IPC: C07C209/36 ,  B01J21/18 ,  B01J23/42 ,  B01J23/89 ,  C07C37/045 ,  B01J35/00 ,  C07C245/20 ,  C07C231/02

Abstract: The present invention generally relates to processes for the catalytic hydrogenation of halonitroaromatics. In particular, the present invention includes processes for the catalytic hydrogenation of halonitroaromatics such as 2,5-dicloronitrobenzene to 2,5-dichloroaniline over a platinum-containing catalyst. The present invention also relates to processes for producing 3,6-dichloro-2-methoxybenzoic acid.

公开(公告)号：US20210322967A1

公开(公告)日：2021-10-21

申请号：US17361357

申请日：2021-06-29

Applicant: Monsanto Technology LLC

Inventor： Kam-To Wan

IPC: B01J38/02 ,  B01J21/06 ,  B01J23/22 ,  B01J29/076 ,  B01J29/90 ,  B01J38/06 ,  B01J38/50 ,  C07C37/00 ,  C07C37/60 ,  F01N9/00 ,  B01J38/16 ,  B01J38/12 ,  B01J38/14 ,  B01D53/86 ,  C07C17/358

Abstract: Catalyst regeneration processes that include measures for controlling emissions generated during the regeneration are described. The present invention further relates to catalytic processes for producing various chlorinated aromatic compounds that include provisions for controlling emissions during catalyst regeneration.

公开(公告)号：US10343965B2

公开(公告)日：2019-07-09

申请号：US15578869

申请日：2016-05-31

Applicant: MONSANTO TECHNOLOGY LLC

Inventor： Kam-To Wan ,  Eduardo A. Casanova ,  John H. Ahn ,  Junqiu Yang

IPC: C02F1/20 ,  C02F1/26 ,  C02F1/66 ,  C07C37/72 ,  C07C37/74 ,  C07C37/84 ,  C07C39/30 ,  C07C51/09 ,  C07C51/15 ,  C07C65/05 ,  C07C65/21 ,  C07C67/31 ,  C07C69/92 ,  C02F101/34 ,  C02F101/36 ,  C07C51/347

Abstract: Various processes for the separation of a mixture containing dichlorophenols are described. In various aspects, the present invention relates to separation processes that produce an extract enriched in 2,4-dichlorophenol content and an extract enriched in 2,5-dichlorophenol content. The present invention further relates to various processes that integrate with these separation processes, such as a process for producing 3,6-dichloro-2-methoxybenzoic acid (dicamba) or salt or ester thereof or a process for producing 2,4-dichlorophenoxyacetic acid (2,4-D) or salt or ester thereof.

公开(公告)号：US09944667B2

公开(公告)日：2018-04-17

申请号：US14848501

申请日：2015-09-09

Applicant: Monsanto Technology LLC

Inventor： Kam-To Wan

IPC: B01J21/18 ,  B01J23/62 ,  B01J23/89 ,  C07F9/38 ,  B01J23/70 ,  B01J23/42 ,  B01J23/74 ,  B01J23/75 ,  B01J23/745

CPC classification number: C07F9/3813 ,  B01J21/18 ,  B01J23/42 ,  B01J23/626 ,  B01J23/70 ,  B01J23/74 ,  B01J23/745 ,  B01J23/75 ,  B01J23/8906 ,  B01J23/8913 ,  B01J23/8926

Abstract: Generally, the present invention relates to improvements in metal utilization in supported, metal-containing catalysts. For example, the present invention relates to methods for directing and/or controlling metal deposition onto surfaces of porous substrates. The present invention also relates to methods for preparing catalysts in which a first metal is deposited onto a support (e.g., a porous carbon support) to provide one or more regions of a first metal at the surface of the support, and a second metal is deposited at the surface of the one or more regions of the first metal. Generally, the electropositivity of the first metal (e.g., copper or iron) is greater than the electropositivity of the second metal (e.g., a noble metal such as platinum) and the second metal is deposited at the surface of the one or more regions of the first metal by displacement of the first metal. The present invention further relates to treated substrates, catalyst precursor structures and catalysts prepared by these methods. The invention further relates to use of catalysts prepared as detailed herein in catalytic oxidation reactions, such as oxidation of a substrate selected from the group consisting of N-(phosphonomethyl) iminodiacetic acid or a salt thereof, formaldehyde, and/or formic acid.