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    PROCESSES FOR PRODUCING TEREPHTHALIC ACID
    2.
    发明申请
    PROCESSES FOR PRODUCING TEREPHTHALIC ACID 有权

    公开(公告)号：US20160060202A1

    公开(公告)日：2016-03-03

    申请号：US14934208

    申请日：2015-11-06

    Applicant: EASTMAN CHEMICAL COMPANY

    Inventor： DAVID MILTON LANGE ,  ASHFAQ SHAHANAWAZ SHAIKH ,  PATRICE L. RIESENBERG ,  MESFIN EJERSSA JANKA

    IPC: C07C51/265

    CPC classification number: C07C51/265 ,  C07C63/26

    Abstract: 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.

    METHOD FOR PRODUCING PURIFIED DIALKYL-FURAN-2,5-DICARBOXYLATE
    4.
    发明申请
    METHOD FOR PRODUCING PURIFIED DIALKYL-FURAN-2,5-DICARBOXYLATE 审中-公开

    公开(公告)号：US20190023675A1

    公开(公告)日：2019-01-24

    申请号：US15875257

    申请日：2018-01-19

    Applicant: EASTMAN CHEMICAL COMPANY

    Inventor： MESFIN EJERSSA JANKA

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

    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.

    PURIFYING CRUDE FURAN 2,5-DICARBOXYLIC ACID BY HYDROGENATION AND A PURGE ZONE
    6.
    发明申请
    PURIFYING CRUDE FURAN 2,5-DICARBOXYLIC ACID BY HYDROGENATION AND A PURGE ZONE 有权
    通过加氢和加热区净化原料呋喃2,5-二羧酸

    公开(公告)号：US20160311790A1

    公开(公告)日：2016-10-27

    申请号：US15200467

    申请日：2016-07-01

    Applicant: EASTMAN CHEMICAL COMPANY

    Inventor： MESFIN EJERSSA JANKA ,  KENNY RANDOLPH PARKER ,  ASHFAQ SHAHANAWAZ SHAIKH ,  LEE PARTIN REYNOLDS ,  CHARLES EDWIN SUMNER ,  SHANE KIPLEY KIRK

    IPC: C07D307/68

    CPC classification number: C07D307/68 ,  B01D11/0446

    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。

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