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    Method for producing 2-methoxyacetic acid
    4.
    发明授权
    Method for producing 2-methoxyacetic acid 有权

    公开(公告)号：US11104634B2

    公开(公告)日：2021-08-31

    申请号：US16311198

    申请日：2017-06-22

    申请人： BASF SE

    发明人： Nicolas Vautravers ,  Joaquim Henrique Teles ,  Werner Pottgiesser ,  Henning Althoefer

    IPC分类号： C07C51/00 ,  C07C51/235 ,  B01J21/18 ,  B01J23/42

    摘要： A method for producing 2-methoxyacetic acid by oxidizing 2-methoxyethanol in a reaction device using oxygen at a temperature of 20 to 100° C. and an oxygen partial pressure of 0.01 to 2 MPa in the presence of water and a heterogeneous catalyst containing platinum, in which the method is carried out semi-continuously or continuously, and 2-methoxyethanol is added to the reaction device in a temporally and/or spatially distributed manner such that temporally and spatially, the mass ratio of 2-methoxyethanol to 2-methoxyethanol plus water per volume element in the reaction device is constantly ≤0.80 of the mass ratio of the added 2-methoxyethanol to the added 2-methoxyethanol plus water.

    Process for recovering heavy metal ions
    6.
    发明授权
    Process for recovering heavy metal ions 有权

    公开(公告)号：US10723633B2

    公开(公告)日：2020-07-28

    申请号：US15392038

    申请日：2016-12-28

    申请人： BP Corporation North America Inc.

    发明人： Dominique Gemoets ,  Wim Verbeeck

    IPC分类号： C01G51/06 ,  C07C51/41 ,  C02F1/52 ,  C22B3/12 ,  C22B3/22 ,  C07C51/00 ,  C07C51/487 ,  C02F101/20 ,  C02F103/36

    摘要： A process is provided for recovering a heavy metal from a waste stream resulting from a process for producing aromatic carboxylic acid by liquid-phase oxidation of an aromatic feedstock compound in the presence of a heavy metal catalyst. The process comprises: (a) producing a carbonate salt precipitate of the heavy metal by adding a source of metal ions and carbonate or bicarbonate ions into the waste stream; (b) separating the precipitate from the waste stream; (c) washing the precipitate with an alkali solution having metal ions therein, wherein at least a portion of the metal ions in the alkali solution are the same as at least a portion of metal ions in the source of metal ions and carbonate or bicarbonate ions; and, (d) recovering the washed precipitate wherein the washed precipitate comprises the heavy metal ions. In one embodiment, the aromatic carboxylic acid comprises terephthalic acid.

    Processes for preparing 2,5-dichlorophenol
    8.
    发明授权
    Processes for preparing 2,5-dichlorophenol 有权

    公开(公告)号：US10550063B2

    公开(公告)日：2020-02-04

    申请号：US15516105

    申请日：2015-10-02

    申请人： Monsanto Technology LLC

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

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

    摘要： 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.

    IMPROVED SYNTHESIS OF LYSINE ACETYLSALICYLATE GLYCINE PARTICLES
    9.
    发明申请
    IMPROVED SYNTHESIS OF LYSINE ACETYLSALICYLATE GLYCINE PARTICLES 审中-公开

    公开(公告)号：US20190322610A1

    公开(公告)日：2019-10-24

    申请号：US16472726

    申请日：2017-12-22

    申请人： VENTALEON GMBH

    发明人： Karlheinz NOCKER ,  Ralf ZUHSE ,  Dmytro OSTROVSKYI

    IPC分类号： C07C51/00

    摘要： The invention relates to a method for the production of acetylsalicylic acid lysinate, optionally lysine acetylsalicylate.glycine, comprising the following steps: a) providing a solution of acetylsalicylic acid in ethanol; b) providing an aqueous solution of lysine; c) combining the solutions of step a) and b) to form a mixture; d) optionally stirring the mixture; e) adding acetone to the mixture; f) incubating the mixture, to allow the formation of a acetylsalicylic acid lysinate product; g) isolating the acetylsalicylic acid lysinate product; wherein acetylsalicylic acid is used in excess compared to lysine and wherein no seed crystals are added to the mixture; and optionally the following further steps: h) providing a recrystallized glycine; wherein the glycine has been recrystallized with the following steps: h1) dissolving glycine in water; h2) adding acetone to the glycine solution; h3) stirring the mixture until a precipitate is obtained; i) combining the recrystallized glycine of step h) with the acetylsalicylic acid lysinate product of step g) to obtain lysine acetylsalicylate.glycine (LASAG) particles.