Process for producing 2,5-furandicarboxylic acid from ethers of 5-hydroxymethylfurfural

    公开(公告)号:US12281090B2

    公开(公告)日:2025-04-22

    申请号:US17778921

    申请日:2020-12-18

    Abstract: A process for producing a carboxylic acid composition including 2,5-furandicarboxylic acid, including the steps: a) oxidizing an oxidizable compound including 5-alkoxymethylfurfural in an oxidation reactor in the presence of a saturated organic acid solvent having from 2 to 6 carbon atoms and a catalyst system comprising cobalt, manganese and bromine using an oxidizing gas at a temperature in the range of 160 to 210° C. to obtain a crude carboxylic acid composition including mono alkyl ester of 2,5-furandicarboxylic acid and solid 2,5-furandicarboxylic acid, b) isolating at least a portion of the solid 2,5-furandicarboxylic acid from the crude carboxylic acid composition in a solid-liquid separation zone to generate a solid cake and a mother liquor, c) determining the amount of manganese and/or cobalt in the cake, and d) increasing the amount of one or more controlling acids in the oxidation reactor.

    PROCESS FOR PRODUCING A POLYESTER COMPRISING 2,5-FURANDICARBOXYLATE UNITS

    公开(公告)号:US20240002592A1

    公开(公告)日:2024-01-04

    申请号:US18039526

    申请日:2021-12-21

    CPC classification number: C08G63/672 C08G63/84 C08G63/83

    Abstract: A process for producing a polyester having 2,5-furandicarboxylate units, which process includes: a) providing or producing a starting composition including 2,5-furandicarboxylic acid or a diester thereof and an aliphatic diol, b) subjecting the starting composition to esterification conditions to produce an ester composition, and c) contacting the ester composition with an aluminum containing catalyst and a phosphorous compound at polycondensation conditions to produce a polyester comprising 2,5-furandicarboxylate units, where the phosphorous compound includes one or more compounds of phosphoric acid based compounds that include an aromatic moiety.

    POLYESTER COMPOSITION
    15.
    发明申请

    公开(公告)号:US20220403157A1

    公开(公告)日:2022-12-22

    申请号:US17773648

    申请日:2020-10-29

    Abstract: A polyester composition includes (a) poly(alkylene-2,5-furandicarboxylate); and (b) an oxygen scavenger composition including (b1) a polybutadiene sacrificial material; (b2) an oxidation catalyst; (b3) optionally, a carrier; and (b4) optionally, a compatibilizer.

    PROCESS FOR THE CONVERSION OF A SOLID LIGNOCELLULOSIC MATERIAL

    公开(公告)号:US20210032217A1

    公开(公告)日:2021-02-04

    申请号:US16965756

    申请日:2019-01-31

    Abstract: A process includes the following steps: a) converting a solid material containing hemicellulose, cellulose and lignin, by: (i) hydrolyzing at least part of the hemicellulose of the solid material with a first aqueous hydrochloric acid solution, yielding a remaining solid material and a hydrochloric acid- containing, aqueous, first hydrolysate product solution; (ii) hydrolyzing at least part of the cellulose of the remaining solid material with a second aqueous hydrochloric acid solution, yielding a residue and a hydrochloric acid-containing, aqueous, second hydrolysate product solution; (b) forwarding to step (c) a, hydrochloric acid-containing, aqueous intermediate product solution comprising: a part of or the whole of the hydrochloric acid-containing, aqueous first and/or second hydrolysate product solution of step (a); and (c) heating at least part of the hydrochloric acid-containing, aqueous intermediate product solution to yield a product solution containing 5-(chloromethyl)furfural, and extracting the 5-(chloromethyl)furfural from the product solution into an extraction solvent.

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