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    Purifying crude furan 2,5-dicarboxylic acid by hydrogenation
    31.
    发明授权
    Purifying crude furan 2,5-dicarboxylic acid by hydrogenation 有权
    通过氢化纯化粗呋喃2,5-二羧酸

    公开(公告)号：US08969404B2

    公开(公告)日：2015-03-03

    申请号：US13758080

    申请日：2013-02-04

    Applicant: Eastman Chemical Company

    Inventor： Mesfin Ejerssa Janka ,  Charles Edwan Sumner, Jr. ,  Shane Kipley Kirk ,  Ashfaq Shahanawaz Shaikh ,  Kenny Randolph Parker

    IPC: A61K31/341 ,  C07D307/34 ,  C07D307/68

    CPC classification number: C07D307/68

    Abstract: A process for purifying a crude furan 2,5-dicarboxylic acid composition (cFDCA) by hydrogenation of a FDCA composition dissolved in a hydrogenation solvent such as water, and hydrogenating under mild conditions, such as at a temperature within a range of 130° C. to 225° C. by contacting the solvated FDCA composition with hydrogen in the presence of a hydrogenation catalyst under a hydrogen partial pressure within a range of 10 psi to 900 psi. A product FDCA composition is produced having a low amount of tetrahydrofuran dicarboxylic acid, a low b*, and a low amount of 5-formyl furan-2-carboxylic acid (FFCA).

    Abstract translation: 通过氢化溶解在氢化溶剂如水中的FDCA组合物，并在温和条件下（例如在130℃的温度范围内）氢化来纯化粗呋喃2,5-二羧酸组合物（cFDCA）的方法 通过在10psi至900psi的氢分压下，在氢化催化剂存在下使溶剂化的FDCA组合物与氢气接触。 制备具有少量四氢呋喃二羧酸，低b *和少量5-甲酰基呋喃-2-羧酸（FFCA）的产品FDCA组合物。

    OXIDATIVE PURIFICATION METHOD FOR PRODUCING PURIFIED DRY FURAN-2,5-DICARBOXYLIC ACID
    33.
    发明申请
    OXIDATIVE PURIFICATION METHOD FOR PRODUCING PURIFIED DRY FURAN-2,5-DICARBOXYLIC ACID 有权
    用于生产纯化的干呋喃-2,5-二羧酸的氧化纯化方法

    公开(公告)号：US20140142328A1

    公开(公告)日：2014-05-22

    申请号：US14084165

    申请日：2013-11-19

    Applicant: EASTMAN CHEMICAL COMPANY

    Inventor： Ashfaq Shaikh ,  Kenny R. Parker ,  Mesfin Ejerssa Janka ,  Lee R. Partin

    IPC: C07D307/68

    CPC classification number: C07D307/68

    Abstract: Disclosed is a process to produce a dry purified carboxylic acid product comprising furan-2,5-dicarboxylic acid (FDCA). The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising FDCA, removing impurities from a crude carboxylic acid slurry via oxidative purification in a low temperature post-oxidation zone to form a low impurity slurry stream. The low impurity slurry stream is further treated in a high temperature post oxidation zone to produce a secondary oxidation slurry stream which is routed to a crystallization zone to from a crystallized slurry stream.

    Abstract translation: 公开了一种生产包含呋喃-2,5-二羧酸（FDCA）的干燥纯化羧酸产物的方法。 该方法包括氧化包含至少一种可氧化化合物的进料流，以产生包含FDCA的粗羧酸浆料，通过在低温后氧化区域中氧化纯化从粗羧酸浆料中除去杂质以形成低杂质浆料流。 低杂质浆料流在高温后氧化区进一步处理，以产生二次氧化淤浆料流，该二次氧化浆料流从结晶料浆流送至结晶区。

    METHOD FOR PRODUCING PURIFIED DIALKYL-FURAN-2,5-DICARBOXYLATE
    38.
    发明申请
    METHOD FOR PRODUCING PURIFIED DIALKYL-FURAN-2,5-DICARBOXYLATE 审中-公开

    公开(公告)号：US20200331879A1

    公开(公告)日：2020-10-22

    申请号：US16914618

    申请日：2020-06-29

    Applicant: Eastman Chemical Company

    Inventor： Mesfin Ejerssa Janka

    IPC: C07D307/68 ,  C07D307/42 ,  B01D3/06 ,  C07B63/00 ,  C07B33/00 ,  C07B63/02 ,  B01D3/14 ,  B01D3/00

    Abstract: Disclosed is a purified dialkyl furan dicarboxylate (DAFD) vapor composition containing at least 99.5 wt. % DAFD; 5-(alkoxycarbonyl) furan-2-carboxylic acid (ACFC) that, if present, is present in an amount of not more than 1000 ppm, alkyl-5-formylfuran-2-carboxylate (AFFC) that, if present, is present in an amount of not more than 1000 ppm, 5-(dialkoxymethyl)furan-2-carboxylic acid (DAFCA) that if present, is present in an amount of not more than 1000 ppm, and alkyl 5-(dialkoxymethyl)furan-2-carboxylate (ADAFC) that if present, is present in an amount of not more than 1000 ppm, in each case based on the weight of the DAFD vapor composition.

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