CONTINUOUS PROCESS OF OXIDATIVE CLEAVAGE OF VEGETABLE OILS

    公开(公告)号:US20160244394A1

    公开(公告)日:2016-08-25

    申请号:US15143838

    申请日:2016-05-02

    Abstract: A continuous process for the oxidative cleavage of vegetable oils containing triglycerides of unsaturated carboxylic acids, to obtain saturated carboxylic acids, comprising feeding to a first continuous reactor a vegetable oil, an oxidizing compound and catalyst capable of catalyzing the oxidation reaction of the olefinic double bond to obtain an intermediate compound containing vicinal diols: feeding to a second continuous reactor said intermediate compound, a compound containing oxygen and a catalyst capable of catalyzing the oxidation reaction of the vicinal diols to carboxylic groups, to obtain saturated monocarboxylic acids (i) and triglycerides containing saturated carboxylic acids with more than one acid function (ii); separating the saturated monocarboxylic acids (i) from the triglycerides (ii); hydrolyzing in a third reactor the triglycerides (ii) to obtain glycerol and saturated carboxylic acids with more than one acid function; and purifying said saturated carboxylic acids by fractioned crystallization by means of wash column (melt crystallization).

    Continuous process of oxidative cleavage of vegetable oils

    公开(公告)号:US10150725B2

    公开(公告)日:2018-12-11

    申请号:US15697515

    申请日:2017-09-07

    Abstract: A continuous process for the oxidative cleavage of vegetable oils containing triglycerides of unsaturated carboxylic acids, to obtain saturated carboxylic acids, comprising feeding to a first continuous reactor a vegetable oil, an oxidizing compound and catalyst capable of catalyzing the oxidation reaction of the olefinic double bond to obtain an intermediate compound containing vicinal diols: feeding to a second continuous reactor said intermediate compound, a compound containing oxygen and a catalyst capable of catalyzing the oxidation reaction of the vicinal diols to carboxylic groups, to obtain saturated monocarboxylic acids (i) and triglycerides containing saturated carboxylic acids with more than one acid function (ii); separating the saturated monocarboxylic acids (i) from the triglycerides (ii); hydrolyzing in a third reactor the triglycerides (ii) to obtain glycerol and saturated carboxylic acids with more than one acid function; and purifying said saturated carboxylic acids by fractioned crystallization by means of wash column (melt crystallization).

    Process for the production and isolation of 5-hydroxymethylfurfural

    公开(公告)号:US10030001B2

    公开(公告)日:2018-07-24

    申请号:US15518861

    申请日:2015-10-16

    Abstract: The present invention relates to a process for the synthesis of 5-hydroxymethyl furfural (HMF) comprising the steps of: 1) dehydrating at least one saccharide selected from monosaccharides having 6 carbon atoms and disaccharides, oligosaccharides or polysaccharides formed from units having 6 carbon atoms or mixtures thereof in the presence of at least one quaternary ammonium salt R3R′N+X−; in which: —R, which is the same or different, represents a C1-C16 substituted or unsubstituted alkyl group; —R′ belongs to the group consisting of: hydrogen, C1-C16 substituted or unsubstituted alkyl group, monocyclic substituted or unsubstituted aryl group; —X− represents an anion selected from chloride, bromide, iodide, fluoride, hydroxide, BF4− and PF6−; at a temperature of between 80 and 120° C., removing water from the reaction medium (dehydration stage) and obtaining a reaction mixture comprising the quaternary ammonium salt, HMF, any unreacted saccharide and having a water content of less than 30% by weight relative to the weight of the product HMF; 2) separating HMF from the said reaction mixture (separation stage).

    PROCESS FOR THE PRODUCTION AND SEPARATION OF 5-HYDROXYMETHYLFURFURAL WITH QUATERNARY AMMONIUM SALTS

    公开(公告)号:US20210292290A1

    公开(公告)日:2021-09-23

    申请号:US17259632

    申请日:2019-07-12

    Abstract: The present invention relates to a process for the production and separation of 5-hydroxymethylfurfural (HMF) comprising the steps of: (1) dehydrating at least one saccharide selected from the group consisting of monosaccharides having 6 carbon atoms and disaccharides, oligosaccharides and polysaccharides formed from units having 6 carbon atoms or mixtures thereof, in the presence of water and of at least one quaternary ammonium salt, at a temperature between 80-130° C., obtaining a reaction mixture comprising the quaternary ammonium salt, HMF and any unreacted saccharide; and (2) subjecting the said reaction mixture to at least one membrane separation operation selected in the group consisting of nanofiltration, reverse osmosis, electrodialisis and their combinations, obtaining an aqueous permeate comprising HMF and a retentate comprising quaternary ammonium salt, wherein both the dehydration of step (1) and the separation operations of step (2) are carried out in the absence of organic solvents.

    Continuous process for the production of derivatives of saturated carboxylic acids
    8.
    发明授权
    Continuous process for the production of derivatives of saturated carboxylic acids 有权
    用于生产饱和羧酸衍生物的连续方法

    公开(公告)号:US09272975B2

    公开(公告)日:2016-03-01

    申请号:US14468809

    申请日:2014-08-26

    Abstract: Provided is a continuous process for the oxidative cleavage of derivatives of unsaturated carboxylic acids for the production of saturated carboxylic acids and their derivatives which comprises the steps of: a) feeding to a first reactor at least a derivative of an unsaturated carboxylic acid, an oxidizing compound and a catalyst capable of catalyzing the oxidation reaction of the olefinic double bond to obtain an intermediate compound containing vicinal diols, and of b) feeding to a second reactor said intermediate compound, a compound containing oxygen and a catalyst capable of catalyzing the oxidation reaction of the vicinal diols to carboxylic groups, to obtain saturated monocarboxylic acids (i) and derivatives of saturated carboxylic acids with more than one acid function (ii); c) separating the saturated monocarboxylic acids (i) from the derivatives of carboxylic acids having more than one acid function (ii).

    Abstract translation: 提供了用于生产饱和羧酸及其衍生物的不饱和羧酸衍生物的氧化裂解的连续方法,其包括以下步骤:a)将至少不饱和羧酸的衍生物,氧化的 化合物和能够催化烯属双键的氧化反应的催化剂,得到含有连位二醇的中间体化合物,以及b)向第二反应器进料所述中间体化合物,含氧的化合物和能够催化氧化反应的催化剂 (i)和具有多于一个酸官能团的饱和羧酸衍生物(ii); c)将饱和一元羧酸(i)与具有多于一个酸官能团的羧酸衍生物(ii)分离。

    PROCESS FOR THE PRODUCTION AND ISOLATION OF 5-HYDROXYMETHYLFURFURAL

    公开(公告)号:US20170233363A1

    公开(公告)日:2017-08-17

    申请号:US15518861

    申请日:2015-10-16

    CPC classification number: C07D307/50 C07D307/46 C07D307/48

    Abstract: The present invention relates to a process for the synthesis of 5-hydroxymethyl furfural (HMF) comprising the steps of: 1) dehydrating at least one saccharide selected from monosaccharides having 6 carbon atoms and disaccharides, oligosaccharides or polysaccharides formed from units having 6 carbon atoms or mixtures thereof in the presence of at least one quaternary ammonium salt R3R′N+X−; in which:—R, which is the same or different, represents a C1-C16 substituted or unsubstituted alkyl group;—R′ belongs to the group consisting of: hydrogen, C1-C16 substituted or unsubstituted alkyl group, monocyclic substituted or unsubstituted aryl group;—X− represents an anion selected from chloride, bromide, iodide, fluoride, hydroxide, BF4− and PF6−; at a temperature of between 80 and 120° C., removing water from the reaction medium (dehydration stage) and obtaining a reaction mixture comprising the quaternary ammonium salt, HMF, any unreacted saccharide and having a water content of less than 30% by weight relative to the weight of the product HMF; 2) separating HMF from the said reaction mixture (separation stage).

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