公开(公告)号：US10703704B2

公开(公告)日：2020-07-07

申请号：US15521785

申请日：2015-10-02

Applicant: ROHM AND HAAS COMPANY ,  DOW GLOBAL TECHNOLOGIES LLC

Inventor： Zubin B. Kuvadia ,  Kirk W. Limbach ,  Dmitri A. Kraptchetov ,  Mark A. Silvano

IPC: C07C67/54 ,  C07C67/39 ,  B01D3/14 ,  C07C67/42

Abstract: A process for continuously removing water in situ from an oxidative esterification reaction is provided. The process includes (a) conducting a first oxidative esterification reaction in a first reactor or reaction zone, wherein the total number of reactors or reaction zones is n and n is at least 2; (b) removing a crude product stream from the first reactor or reaction zone; (c) introducing the crude product stream to a distillation column to generate a column overheads stream and a column bottoms stream; (d) passing a portion of the columns bottoms stream to the product recovery zone; and (e) passing a portion of the column overheads stream to a subsequent reactor or reaction zone. Steps (a)-(e) can be repeated.

公开(公告)号：US20170240500A1

公开(公告)日：2017-08-24

申请号：US15521762

申请日：2015-10-02

Applicant: Dow Global Technologies LLC ,  ROHM AND HAAS COMPANY

Inventor： Zubin B. Kuvadia ,  Kirk W. Limbach ,  Dmitri A. Kraptchetov ,  Mark A. Silvano

IPC: C07C67/54 ,  C02F1/00 ,  C02F1/04 ,  C07C67/40 ,  B01D3/42

CPC classification number: C07C67/54 ,  B01D3/4205 ,  C02F1/008 ,  C02F1/04 ,  C02F2103/38 ,  C07C67/39 ,  C07C67/40 ,  C07C69/54

Abstract: A process for removing water from an oxidative esterification reactor includes (a) conducting an oxidative esterification reaction in a reactor; (b) removing a crude product stream from the reactor; (c) passing a first portion of the crude product stream directly to a product recovery zone; (d) introducing a second portion of the crude product stream to a distillation column to generate a column overheads stream and a column bottoms stream; (e) passing at least a portion of the columns bottoms stream to the product recovery zone; and (f) recycling a recycle stream comprising at least a portion of the overheads stream to the reactor; wherein the recycle stream contains less than 1 weight percent (wt %) water based on the total weight of the recycle stream, wherein the weight ratio of the first portion to the second portion is at least 1:10, and wherein the amount of the recycle stream recycled to the reactor is such that the reactor contains less than or equal to 2.5 wt % water, based on the weight of the reactor contents.

公开(公告)号：US20170226043A1

公开(公告)日：2017-08-10

申请号：US15521750

申请日：2015-10-07

Applicant: Rohm and Haas Company

Inventor： Kirk W. Limbach ,  Dmitri A. Kraptchetov ,  Christopher D. Frick

IPC: C07C67/44

CPC classification number: C07C67/44 ,  C07C67/39 ,  C07C69/54

Abstract: A process for the preparation of MMA via oxidative esterification in the presence of a catalyst comprising palladium, bismuth, and antimony.

公开(公告)号：US20160168072A1

公开(公告)日：2016-06-16

申请号：US14905164

申请日：2014-07-29

Applicant: ROHM AND HAAS COMPANY

Inventor： Kirk K. Limbach ,  Dmitri A. Kraptchetov ,  Christopher D. Frick

IPC: C07C67/39 ,  B01J27/057

CPC classification number: C07C67/39 ,  B01J21/04 ,  B01J23/002 ,  B01J23/6447 ,  B01J27/0576 ,  B01J37/031 ,  B01J37/038 ,  B01J37/16 ,  B01J2523/00 ,  C07C69/54 ,  B01J2523/31 ,  B01J2523/54 ,  B01J2523/64 ,  B01J2523/824

Abstract: A process for producing methyl methacrylate, the process comprising contacting reactants comprising methacrolein, methanol and an oxygen-containing gas, under reaction conditions in the presence of a solid catalyst comprising palladium, bismuth and tellurium, wherein the solid catalyst further comprises a support selected from at least one member of the group consisting of silica, and alumina, with the proviso that the process produces less than 1 mole methyl formate per mole of methyl methacrylate.

Abstract translation: 一种生产甲基丙烯酸甲酯的方法，该方法包括在包含钯，铋和碲的固体催化剂的存在下，在反应条件下使包含甲基丙烯醛，甲醇和含氧气体的反应物接触，其中所述固体催化剂还包含选自 由二氧化硅和氧化铝组成的组中的至少一个成员，条件是该方法每摩尔甲基丙烯酸甲酯产生少于1摩尔甲酸甲酯。