公开(公告)号：US10232353B2

公开(公告)日：2019-03-19

申请号：US15543291

申请日：2015-12-29

Applicant: Alexander Lygin ,  Steffen Krill ,  Matthias Groemping ,  Andreas Tepperis

Inventor： Alexander Lygin ,  Steffen Krill ,  Matthias Groemping ,  Andreas Tepperis

IPC: B01J23/02 ,  B01J23/04 ,  B01J23/10 ,  B01J23/14 ,  B01J23/18 ,  B01J23/34 ,  B01J23/52 ,  B01J23/66 ,  B01J23/68 ,  B01J23/89 ,  B01J35/00 ,  B01J35/02 ,  B01J35/08 ,  B01J37/02 ,  B01J37/04 ,  C07C67/39 ,  C07C69/54

Abstract: Catalysts for oxidative esterification can be used, for example, for converting (meth)acrolein to methyl (meth)acrylate. The catalysts are especially notable for high mechanical and chemical stability even over very long time periods, including activity and/or selectivity relatively in continuous operation in media having even a small water content.

公开(公告)号：US09617199B2

公开(公告)日：2017-04-11

申请号：US15030775

申请日：2014-12-05

Applicant: Steffen Krill ,  Alexander Lygin ,  Torsten Balduf ,  Rudolf Burghardt ,  Andreas Tepperis ,  Matthias Groemping

Inventor： Steffen Krill ,  Alexander Lygin ,  Torsten Balduf ,  Rudolf Burghardt ,  Andreas Tepperis ,  Matthias Groemping

IPC: C07C67/39 ,  B01J23/02 ,  B01J23/89 ,  B01J35/00

CPC classification number: C07C67/39 ,  B01J23/02 ,  B01J23/892 ,  B01J35/0006 ,  B01J35/0013 ,  Y02P20/582 ,  C07C69/54

Abstract: The present invention relates to a process for preparing methyl methacrylate by a direct oxidative esterification of methacrolein with oxygen and methanol, which is conducted in the liquid phase at a pressure of 2 to 100 bar with a gold catalyst. According to the invention, the liquid phase is withdrawn continuously from the reactor and optionally enriched with oxygenous gas, the pH, after the withdrawal, is adjusted to a pH between 5 and 9 by means of addition of a basic solution and this liquid phase is conducted back into the reactor again to an extent of at least 50%.

公开(公告)号：US20180001307A1

公开(公告)日：2018-01-04

申请号：US15543291

申请日：2015-12-29

Applicant: Alexander LYGIN ,  Steffen KRILL ,  Matthias GROEMPING ,  Andreas TEPPERIS

Inventor： Alexander LYGIN ,  Steffen KRILL ,  Matthias GROEMPING ,  Andreas TEPPERIS

IPC: B01J23/52 ,  B01J37/04 ,  B01J37/02 ,  B01J35/08 ,  B01J23/02 ,  B01J35/02 ,  B01J23/34 ,  B01J23/18 ,  B01J23/14 ,  B01J23/10 ,  B01J23/04 ,  C07C67/39 ,  B01J35/00

CPC classification number: B01J23/52 ,  B01J23/02 ,  B01J23/04 ,  B01J23/10 ,  B01J23/14 ,  B01J23/18 ,  B01J23/34 ,  B01J23/66 ,  B01J23/681 ,  B01J23/688 ,  B01J23/8946 ,  B01J35/0006 ,  B01J35/0013 ,  B01J35/0033 ,  B01J35/006 ,  B01J35/008 ,  B01J35/026 ,  B01J35/08 ,  B01J37/0207 ,  B01J37/0213 ,  B01J37/0236 ,  B01J37/0244 ,  B01J37/04 ,  B01J2523/00 ,  C07C67/39 ,  B01J2523/22 ,  B01J2523/31 ,  B01J2523/41 ,  B01J2523/54 ,  B01J2523/3712 ,  B01J2523/48 ,  B01J2523/44 ,  B01J2523/36 ,  B01J2523/3706 ,  B01J2523/11 ,  C07C69/54

Abstract: Catalysts for oxidative esterification can be used, for example, fro converting (meth)acrolein to methyl (meth)acrylate. The catalysts are especially notable for high mechanical and chemical stability even over very long time periods, including activity and/or selectivity relatively in continuous operation in media having even a small water content.

公开(公告)号：US20160251301A1

公开(公告)日：2016-09-01

申请号：US15030775

申请日：2014-12-05

Applicant: Alexander LYGIN ,  Steffen KRILL ,  Torsten BALDUF ,  Rudolf BURGHARDT ,  Andreas TEPPERIS ,  Matthias GRÖMPING

Inventor： Steffen KRILL ,  Alexander LYGIN ,  Torsten BALDUF ,  Rudolf BURGHARDT ,  Andreas TEPPERIS ,  Matthias GROEMPING

IPC: C07C67/39 ,  B01J23/02 ,  B01J35/00 ,  B01J23/89

CPC classification number: C07C67/39 ,  B01J23/02 ,  B01J23/892 ,  B01J35/0006 ,  B01J35/0013 ,  Y02P20/582 ,  C07C69/54

Abstract: The present invention relates to a process for preparing methyl methacrylate by a direct oxidative esterification of methacrolein with oxygen and methanol, which is conducted in the liquid phase at a pressure of 2 to 100 bar with a gold catalyst. According to the invention, the liquid phase is withdrawn continuously from the reactor and optionally enriched with oxygenous gas, the pH, after the withdrawal, is adjusted to a pH between 5 and 9 by means of addition of a basic solution and this liquid phase is conducted back into the reactor again to an extent of at least 50%.

Abstract translation: 本发明涉及一种通过甲基丙烯醛与氧和甲醇直接氧化酯化制备甲基丙烯酸甲酯的方法，该方法是用金催化剂在2-100巴的压力下在液相中进行。 根据本发明，将液相从反应器连续取出并任选地富含氧气，通过加入碱性溶液将pH值在5至9之间通过加入碱性溶液调节到pH值，该液相为 再次进入反应器至少达到50％的程度。