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11 条记录 (耗时 0.018 秒)

    Method to increase the resistance of double metal cyanide catalysts to deactivation
    1.
    发明授权
    Method to increase the resistance of double metal cyanide catalysts to deactivation 审中-公开

    公开(公告)号：US10669368B2

    公开(公告)日：2020-06-02

    申请号：US13836114

    申请日：2013-03-15

    申请人： COVESTRO LLC

    发明人： Edward P. Browne ,  Jose Pazos

    IPC分类号： C08G65/12 ,  C08G18/48 ,  C08G65/26 ,  C08G65/08 ,  C08G101/00

    摘要： This invention relates to a semi-batch process for the production of polyoxyalkylene polyether polyols. These polyoxyalkylene polyether polyols have hydroxyl (OH) numbers of from 112 to 400. This process comprises establishing oxyalkylation condition in a reactor in the presence of a DMC catalyst, continuously introducing alkylene oxide and a suitable starter into the reactor, and recovering an oxyalkyated polyether polyol. The oxyalkylation initially occurs at a temperature that is sufficiently high enough to avoid or prevent deactivation of the DMC catalyst, or for from 2% to 50% of the total oxide feed amount, and the oxyalkylation is then continued at a lower temperature.

    Process for the production of low molecular weight polyoxyalkylene polyols
    2.
    发明授权
    Process for the production of low molecular weight polyoxyalkylene polyols 有权

    公开(公告)号：US09879114B2

    公开(公告)日：2018-01-30

    申请号：US14978079

    申请日：2015-12-22

    申请人： Covestro LLC

    发明人： Jack R. Reese ,  Phillip E. Bowles ,  Edward P. Browne

    IPC分类号： C08G65/10 ,  B01J37/26 ,  C08G65/26

    CPC分类号： C08G65/10 ,  B01J37/26 ,  C08G65/2663 ,  C08G65/2696

    摘要： This invention relates to a semi-batch process for producing low molecular weight polyoxyalkylene polyols. These polyoxyalkylene polyols are characterized by hydroxyl numbers of from 200 to 500. In accordance with the invention, the first alkylene oxide block used to activate the DMC catalyst comprises from 50% to 100% by weight of propylene oxide and from 0% to 50% by weight of ethylene oxide; and the second alkylene oxide block comprises from 50% to 100% by weight of propylene oxide and from 0% to 50% by weight of ethylene oxide. A continuously added starter is present. Optionally, a third alkylene oxide block can be added. The addition of the second alkylene oxide block and of the third alkylene oxide block when present is completed with a space time yield of greater than or equal to 250 kg/m3/hr.

    PROCESS FOR THE PRODUCTION OF LOW MOLECULAR WEIGHT POLYOXYALKYLENE POLYOLS
    3.
    发明申请
    PROCESS FOR THE PRODUCTION OF LOW MOLECULAR WEIGHT POLYOXYALKYLENE POLYOLS 有权

    公开(公告)号：US20170174834A1

    公开(公告)日：2017-06-22

    申请号：US14978079

    申请日：2015-12-22

    申请人： Covestro LLC

    发明人： Jack R. Reese ,  Phillip E. Bowles ,  Edward P. Browne

    IPC分类号： C08G65/10

    CPC分类号： C08G65/10 ,  B01J37/26 ,  C08G65/2663 ,  C08G65/2696

    摘要： This invention relates to a semi-batch process for producing low molecular weight polyoxyalkylene polyols. These polyoxyalkylene polyols are characterized by hydroxyl numbers of from 200 to 500. In accordance with the invention, the first alkylene oxide block used to activate the DMC catalyst comprises from 50% to 100% by weight of propylene oxide and from 0% to 50% by weight of ethylene oxide; and the second alkylene oxide block comprises from 50% to 100% by weight of propylene oxide and from 0% to 50% by weight of ethylene oxide. A continuously added starter is present. Optionally, a third alkylene oxide block can be added. The addition of the second alkylene oxide block and of the third alkylene oxide block when present is completed with a space time yield of greater than or equal to 250 kg/m3/hr.

    Processes for producing aromatic diamine-initiated polyether polyols
    5.
    发明授权
    Processes for producing aromatic diamine-initiated polyether polyols 有权

    公开(公告)号：US11629225B2

    公开(公告)日：2023-04-18

    申请号：US16883243

    申请日：2020-05-26

    申请人： Covestro LLC ,  Covestro Deutschland AG

    发明人： Jenna L. Caputo ,  Anthony R. Loveday ,  Edward P. Browne

    IPC分类号： C08G65/26 ,  C08G18/50

    摘要： Processes are described for producing an aromatic diamine-initiated polyether polyol having a measured OH number of 300 to 500 mg KOH/g and a viscosity at 25° C. of 5000 to 50,000 mPas. The processes include a first alkoxylation step in which an alkylene oxide consisting essentially of propylene oxide is reacted with a starter consisting essentially of aromatic diamine at a molar ratio of propylene oxide to aromatic diamine of 1.4:1 to 2.0:1 to form an alkoxylated product; and a second alkoxylation step in which an alkylene oxide consisting essentially of propylene oxide is reacted with the alkoxylated product, in the presence of an added catalyst, until the ratio of moles of propylene oxide added in the process to the moles of aromatic diamine added in the process is 4:1 to 9:1.

    PROCESSES FOR PRODUCING AROMATIC DIAMINE-INITIATED POLYETHER POLYOLS
    9.
    发明申请
    PROCESSES FOR PRODUCING AROMATIC DIAMINE-INITIATED POLYETHER POLYOLS 有权

    公开(公告)号：US20210371586A1

    公开(公告)日：2021-12-02

    申请号：US16883243

    申请日：2020-05-26

    申请人： Covestro LLC ,  Covestro Deutschland AG

    发明人： Jenna L. Caputo ,  Anthony R. Loveday ,  Edward P. Browne

    IPC分类号： C08G65/26 ,  C08G18/50

    摘要： Processes are described for producing an aromatic diamine-initiated polyether polyol having a measured OH number of 300 to 500 mg KOH/g and a viscosity at 25° C. of 5000 to 50,000 mPas. The processes include a first alkoxylation step in which an alkylene oxide consisting essentially of propylene oxide is reacted with a starter consisting essentially of aromatic diamine at a molar ratio of propylene oxide to aromatic diamine of 1.4:1 to 2.0:1 to form an alkoxylated product; and a second alkoxylation step in which an alkylene oxide consisting essentially of propylene oxide is reacted with the alkoxylated product, in the presence of an added catalyst, until the ratio of moles of propylene oxide added in the process to the moles of aromatic diamine added in the process is 4:1 to 9:1.