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    Processes for preparing 4-methyl-5-nonanone and 4-methyl-5-nonanol
    4.
    发明授权
    Processes for preparing 4-methyl-5-nonanone and 4-methyl-5-nonanol 有权

    公开(公告)号：US10882806B2

    公开(公告)日：2021-01-05

    申请号：US16722138

    申请日：2019-12-20

    申请人： Shin-Etsu Chemical Co., Ltd.

    发明人： Yuki Miyake ,  Takeshi Kinsho ,  Ryo Komatsu

    IPC分类号： C07C29/143 ,  C07C17/16 ,  C07C51/56 ,  C07C45/45 ,  C07C51/487

    摘要： The present invention provides a process for preparing 4-methyl-5-nonanone of the following formula (3), the process comprising at least a step of subjecting pentanoic anhydride of the following formula (1) and a 2-pentyl nucleophilic reagent of the following general formula (2), in which M represents Li, MgZ1, or ZnZ1, wherein Z1 represents a halogen atom or a 2-pentyl group, to a nucleophilic substitution reaction to produce 4-methyl-5-nonanone (3), as well as a process for preparing 4-methyl-5-nonanol of the following formula (7), the process comprising at least steps of preparing 4-methyl-5-nonanone and subjecting the obtained 4-methyl-5-nonanone and a reducing agent to a reduction reaction to produce 4-methyl-5-nonanol (7).

    Method of purifying acetic acid
    5.
    发明授权
    Method of purifying acetic acid 有权

    公开(公告)号：US10793502B2

    公开(公告)日：2020-10-06

    申请号：US16468516

    申请日：2017-12-19

    申请人： SABIC GLOBAL TECHNOLOGIES B.V.

    发明人： Mohammed H. Al-Hazmi ,  Shahid Azam

    IPC分类号： C07C51/44 ,  C07C51/487

    摘要： Disclosed herein is a method of purifying acetic acid. The method comprises passing a feed stream comprising acetic acid through a distillation column; contacting the acetic acid with a permanganate oxidizing agent and hydrogen gas within the distillation column; withdrawing an acetic acid product from the distillation column; and withdrawing a gaseous product stream from a top portion of the distillation column, wherein the gaseous product stream comprises ethane, methane, carbon dioxide, oxygen, nitrogen, or a combination comprising at least one of the foregoing.

    A METHOD OF PRODUCING TEREPHTHALIC ACID
    7.
    发明申请
    A METHOD OF PRODUCING TEREPHTHALIC ACID 审中-公开

    公开(公告)号：US20180319732A1

    公开(公告)日：2018-11-08

    申请号：US15775874

    申请日：2016-11-14

    申请人： SABIC GLOBAL TECHNOLOGIES B.V.

    发明人： Nedumbamana Sankaran ,  Syed Azhar Hashmi ,  Vinodkumar Vasudevan

    IPC分类号： C07C51/487

    CPC分类号： C07C51/487 ,  C07C1/12 ,  C07C11/02

    摘要： A method of reducing the formation of an impurity in a terephthalic acid (TPA) production process includes: combining in a reactor, a catalyst, a mixture comprising the impurity and the TPA, and a compound comprising an active carbon atom; reacting the impurity with the compound in the presence of the catalyst by a condensation-dehydration reaction process comprising a nucleophilic addition of the active carbon atom of the compound to a carbonyl group of the impurity to form an intermediate followed by a dehydration reaction of the intermediate to form a product mixture comprising a water, the TPA, and an alkene; and recovering the product mixture from the reactor.

    PROCESS FOR REMOVING IMPURITIES FROM ACETIC ACID
    9.
    发明申请
    PROCESS FOR REMOVING IMPURITIES FROM ACETIC ACID 审中-公开

    公开(公告)号：US20180021692A1

    公开(公告)日：2018-01-25

    申请号：US15553761

    申请日：2016-02-23

    申请人： SABIC Global Technologies B.V.

    发明人： Roland Schmidt ,  Sebastiano Licciulli ,  Shahid Azam

    IPC分类号： B01D3/00 ,  C07C51/487 ,  C07C53/08 ,  B01D5/00

    摘要： A process of purifying acetic acid is provided. The process includes feeding a stream of acetic acid into a distillation column and distilling acetic acid in the presence of an oxidizing agent in the distillation column, to oxidize oxidizable impurities in the acetic acid, wherein the oxidizing agent is an oxidant capable of cleaving C═C bonds. The process further includes removing a distilled acetic acid stream from the distillation column. Further processes for purifying acetic acid and systems for purifying acetic acid are also provided.

    Processes for improving acetic acid yield by removing iron
    10.
    发明授权
    Processes for improving acetic acid yield by removing iron 有权

    公开(公告)号：US09688600B2

    公开(公告)日：2017-06-27

    申请号：US14941008

    申请日：2015-11-13

    申请人： CELANESE INTERNATIONAL CORPORATION

    发明人： Yaw-Hwa Liu ,  Mark O. Scates

    IPC分类号： C07C51/12 ,  C07C51/47 ,  C07C51/44 ,  B01J31/40 ,  C07C51/487

    CPC分类号： C07C51/12 ,  B01J31/4046 ,  C07C51/44 ,  C07C51/47 ,  C07C51/487 ,  C07C53/08

    摘要： In a process for improving a carbonylation process, iron is removed to maintain an effective Space Time Yield (STY) of the rhodium catalyst of at least 80% of the maximum STY. The process comprises carbonylating methanol in a reactor in a reaction medium comprising water, a rhodium catalyst, methyl iodide and a halide salt, separating a portion of the reaction medium in a flash vessel to form a less volatile stream and a vapor product stream comprising acetic acid, recycling a liquid stream to the reactor, wherein the liquid stream comprises a portion of the less volatile stream and wherein the liquid stream comprises iron, and removing a portion of the iron from the liquid stream to maintain an effective STY of the rhodium catalyst of at least 80% of the maximum STY.