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    Method for producing purified dialkyl-furan-2,5-dicarboxylate
    23.
    发明授权
    Method for producing purified dialkyl-furan-2,5-dicarboxylate 有权

    公开(公告)号：US10696645B2

    公开(公告)日：2020-06-30

    申请号：US15875352

    申请日：2018-01-19

    申请人： EASTMAN CHEMICAL COMPANY

    发明人： Mesfin Ejerssa Janka

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

    摘要： 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.

    Process for purifying crude furan 2,5-dicarboxylic acid using hydrogenation
    29.
    发明授权
    Process for purifying crude furan 2,5-dicarboxylic acid using hydrogenation 有权

    公开(公告)号：US09458122B2

    公开(公告)日：2016-10-04

    申请号：US14841867

    申请日：2015-09-01

    申请人： Eastman Chemical Company

    发明人： Ashfaq Shahanawaz Shaikh ,  Kenny Randolph Parker ,  Mesfin Ejerssa Janka ,  Lee Reynolds Partin

    IPC分类号： C07D307/68

    CPC分类号： C07D307/68

    摘要： A process to produce a dry purified furan-2,5-dicarboxylic acid (FDCA) is described. After oxidation of 5-(hydroxymethyl)furfural (5-HMF), a crude FDCA stream is produced that is fed to a crystallization zone followed by a solid-liquid displacement zone to form a low impurity slurry stream. The solids in the low impurity slurry stream are dissolved in a dissolution zone to produce a hydrogenation feed that is hydrogenated in a hydrogenation reactor to generate a hydrogenated FDCA composition. The hydrogenated FDCA composition is routed to a crystallization zone to form a crystallized produce stream that is separated from liquid in a solid-liquid separation zone to generate a purified wet cake stream containing FDCA that can be dried in a drying zone to generate a dry purified FDCA product stream.

    PROCESSES FOR PRODUCING TEREPHTHALIC ACID
    30.
    发明申请
    PROCESSES FOR PRODUCING TEREPHTHALIC ACID 有权
    生产过硫酸的方法

    公开(公告)号：US20150087859A1

    公开(公告)日：2015-03-26

    申请号：US14034617

    申请日：2013-09-24

    申请人： Eastman Chemical Company

    发明人： David Milton Lange ,  Ashfaq Shahanawaz Shaikh ,  Patrice L. Riesenberg ,  Mesfin Ejerssa Janka

    IPC分类号： C07C51/265

    CPC分类号： C07C51/265 ,  C07C63/26

    摘要： Processes for producing terephthalic acid are disclosed, the processes including a step of combining in a reaction medium para-xylene, a solvent comprising water and a saturated organic acid having from 2-4 carbon atoms, and an oxygen-containing gas, at a temperature for example from about 145° C. to about 175° C., in the presence of a catalyst composition comprising cobalt, manganese, zirconium, and bromine, wherein the zirconium is present in the reaction medium in an amount, for example, from 1 ppm to 50 ppm with respect to the weight of the liquid in the reaction medium.

    摘要翻译： 公开了制备对苯二甲酸的方法，该方法包括在反应介质中将对二甲苯，包含水和含有2-4个碳原子的饱和有机酸的溶剂和含氧气体在一定温度下混合的步骤 例如约145℃至约175℃，在包含钴，锰，锆和溴的催化剂组合物存在下，其中锆以例如1的量存在于反应介质中 相对于反应介质中液体的重量为ppm至50ppm。