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    PURIFICATION OF FERULIC ACID
    1.
    发明公开
    PURIFICATION OF FERULIC ACID 审中-公开

    公开(公告)号：US20230373896A1

    公开(公告)日：2023-11-23

    申请号：US18247606

    申请日：2021-09-30

    Applicant: RHODIA OPERATIONS

    Inventor： Laurent Garel ,  Tiago Alves Mendes

    IPC: C07C51/42

    CPC classification number: C07C51/42

    Abstract: The present invention relates to a method for purifying a liquid medium comprising ferulic acid, a solvent and at least one impurity, the method comprising a step (a) of bringing the liquid medium into contact with a first complexing agent so as to obtain a first precipitate P1 and a liquid medium C1, and a step (b) of separating the first precipitate P1 from the liquid medium C1 so as to obtain a liquid medium F1 comprising purified ferulic acid. The present invention also relates to a method for separating ferulic acid oligomers and to their use as a scavenger of free radicals or radical species, in particular as a polymerisation inhibitor, antioxidant or UV stabiliser.

    Compositions comprising hydroquinone and catechol, method for preparing these compositions
    2.
    发明授权
    Compositions comprising hydroquinone and catechol, method for preparing these compositions 有权

    公开(公告)号：US11208370B2

    公开(公告)日：2021-12-28

    申请号：US16619878

    申请日：2018-06-12

    Applicant: RHODIA OPERATIONS

    Inventor： Laurent Garel

    IPC: C07C39/06 ,  C07C39/08 ,  C07C43/205 ,  C07C15/085 ,  C07C37/60

    Abstract: The present invention describes compositions comprising at least one compound chosen from hydroquinone and catechol, characterised in that it further comprises between 0.1 and 10,000 ppm of at least one compound chosen from 2-(alkoxy)phenol, 4-(alkoxy)phenol, 2-(alkyl)phenol, 4-(alkyl)phenol, (alkyl)catechol and (alkyl)hydroquinone. Another aspect of this invention concerns a method for preparing a composition comprising at least one compound chosen from hydroquinone and catechol according to the invention, characterised in that it comprises a step (a) of reacting the phenol with hydrogen peroxide in the presence of a catalyst, in a solvent comprising an alcohol.

    METHOD FOR PRODUCING ALKOXYHYDROXYBENZALDEHYDE
    4.
    发明申请
    METHOD FOR PRODUCING ALKOXYHYDROXYBENZALDEHYDE 有权
    生产烷基羟基苯甲醛的方法

    公开(公告)号：US20160251291A1

    公开(公告)日：2016-09-01

    申请号：US15150028

    申请日：2016-05-09

    Applicant: Rhodia Operations

    Inventor： Laurent Garel

    IPC: C07C45/37

    CPC classification number: C07C41/16 ,  C07C41/42 ,  C07C45/54 ,  C07C51/367 ,  Y02P20/582 ,  C07C43/23 ,  C07C59/64 ,  C07C47/58

    Abstract: Processes may include producing at least one alkoxyhydroxybenzaldehyde compound from at least one hydroxyphenol compound, wherein processes include the steps of: (i) synthetizing at least one alkoxyphenol from said at least one hydroxyphenol in the presence of at least one O-alkylating agent; (ii) recovering said at least one alkoxyphenol and impurities, wherein said impurities includes a dialkoxybenzene compound; (iii) separating said dialkoxybenzene from the alkoxyphenol; (iv) condensing the alkoxyphenol with glyoxylic acid and obtaining the corresponding mandelic compound; (v) oxidizing said mandelic compound to give the corresponding alkoxyhydroxy-benzaldehyde; and (vi) recovering said alkoxyhydroxybenzaldehyde.

    Abstract translation: 方法可包括从至少一种羟基苯酚化合物制备至少一种烷氧基羟基苯甲醛化合物，其中方法包括以下步骤：（i）在至少一种O-烷基化试剂存在下，使所述至少一种羟基苯酚合成至少一种烷氧基苯酚; （ii）回收所述至少一种烷氧基苯酚和杂质，其中所述杂质包括二烷氧基苯化合物; （iii）从烷氧基苯酚中分离出所述二烷氧基苯; （iv）将烷氧基苯酚与乙醛酸缩合并得到相应的扁桃酸化合物; （v）氧化所述扁桃酸化合物，得到相应的烷氧基羟基 - 苯甲醛; 和（vi）回收所述烷氧基羟基苯甲醛。

    Method for preparing a vanillin derivative
    5.
    发明申请
    Method for preparing a vanillin derivative 有权
    香草醛衍生物的制备方法

    公开(公告)号：US20140323769A1

    公开(公告)日：2014-10-30

    申请号：US14349842

    申请日：2012-10-05

    Applicant: RHODIA OPERATIONS

    Inventor： Laurent Garel ,  Martine Vibert ,  Corine Cochennec ,  François Metz

    IPC: C07C45/64

    CPC classification number: C07C45/64 ,  C07C47/575

    Abstract: A method for preparing a compound of formula (I) which is a vanillin derivative, of dimer type, called 3-(4-hydroxy-3-methoxybenzyl)-4-hydroxy-5-methoxybenzaldehyde, such method comprising a reaction of vanillin and vanillyl alcohol in the presence of a base.

    Abstract translation: 制备称为3-（4-羟基-3-甲氧基苄基）-4-羟基-5-甲氧基苯甲醛的二聚体型香草醛衍生物的式（I）化合物的方法，该方法包括香草醛和 香草醇在碱的存在下。

    Process for treating effluents from the production of an aromatic compound derived from a dihydroxylated benzene
    8.
    发明申请
    Process for treating effluents from the production of an aromatic compound derived from a dihydroxylated benzene 审中-公开
    处理来自二羟基化苯衍生的芳族化合物的流出物的方法

    公开(公告)号：US20150034551A1

    公开(公告)日：2015-02-05

    申请号：US14385038

    申请日：2013-03-15

    Applicant: RHODIA OPERATIONS

    Inventor： Laurent Garel ,  Bertrand Satier

    IPC: C02F9/00 ,  F23G5/04

    CPC classification number: C02F9/00 ,  C02F1/048 ,  C02F1/283 ,  C02F1/32 ,  C02F1/52 ,  C02F1/722 ,  C02F1/725 ,  C02F3/00 ,  C02F11/10 ,  C02F2101/101 ,  C02F2101/30 ,  C02F2101/40 ,  C02F2103/36 ,  C02F2209/06 ,  C02F2305/026 ,  F23G5/04 ,  Y02W10/40

    Abstract: A process for treating an aqueous solution (A) derived from a method of producing a compound of formula (I), wherein R1 and R2 are identical or different and are chosen from among hydrogen and C1-C5 alkyl, wherein R1 and R2 together form a methylene group, and wherein R3, R4, R5 and R6, which are independently identical or different, are chosen from among: a hydrogen atom, a hydroxy group (—OH), an alkoxy group (—OR), an alcohol group (—ROH), an aldehyde group (—CHO), a ketone group (—C(═O)R), an acid group (—COOH), a nitrile group (—CN), a C1-C6 alkyl chain, linear or branched, saturated or unsaturated, potentially comprising one or a plurality of substitutes in a terminal or lateral position or one or more functions in said alkyl chain, R being a C1-C5 alkyl, wherein the aqueous solution (A) comprises at least one sulfate salt SO42−(S) rendered soluble and at least one aromatic organic compound (O) formed during the method for producing the compound (I), and wherein the process comprises at least one step (i) of recovering a solid sulfate salt (S) in an at least partially anhydride form separately from the aqueous solution (A).

    Abstract translation: 一种处理衍生自式（I）化合物的方法的水溶液（A）的方法，其中R 1和R 2相同或不同并且选自氢和C 1 -C 5烷基，其中R 1和R 2一起形成 亚甲基，其中独立地相同或不同的R 3，R 4，R 5和R 6选自：氢原子，羟基（-OH），烷氧基（-OR），醇基（ -ROH），醛基（-CHO），酮基（-C（= O）R），酸基（-COOH），腈基（-CN），C1-C6烷基链，直链或 分支的，饱和的或不饱和的，潜在地包含在所述烷基链中的末端或侧面位置中的一个或多个取代基或一个或多个功能，R是C 1 -C 5烷基，其中所述水溶液（A）包含至少一种硫酸盐 盐S42-（S）变得可溶，并且在制备化合物（I）的方法期间形成至少一种芳族有机化合物（O），并且其中 该方法包括至少一个步骤（i）以与水溶液（A）分开的至少部分酸酐形式回收固体硫酸盐（S）。

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