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    Process for producing tartaric acid from a raw material containing potassium hydrogentartrate
    3.
    发明授权
    Process for producing tartaric acid from a raw material containing potassium hydrogentartrate 有权
    从含有酒石酸钾的原料中生产酒石酸的方法

    公开(公告)号：US06534678B1

    公开(公告)日：2003-03-18

    申请号：US09303975

    申请日：1999-05-03

    申请人： Rudolf Bönsch ,  Dieter Stein ,  Klaus Erb

    发明人： Rudolf Bönsch ,  Dieter Stein ,  Klaus Erb

    IPC分类号： C07C5142

    CPC分类号： C07C51/412 ,  C07C51/02 ,  C07C51/487 ,  C07C59/255

    摘要： Process for producing tartaric acid from a raw material whose dry matter comprises at least 5 wt% potassium hydrogentartrate wherein the raw material containing potassium hydrogen tartrate (KHT) is mixed with aqueous potassium hydroxide solution in a first reaction stage, where KHT is virtually completely reacted to form dipotassium tartrate (DKT), the aqueous solution containing DKT is then mixed with added acid in a precipitation stage at a pH value of 2.0 to 5.0, to produce a suspension containing crystallized KHT; crystallized KHT is then separated from the suspension, washed with water, and there is produced a solution at least 80 wt-% saturated with KHT and then the potassium is removed, to obtain an aqueous tartaric acid product solution, from which water is then at least partly removed.

    摘要翻译： 从干物质包含至少5重量％的氢化酒石酸钾的原料生产酒石酸的方法，其中在第一反应阶段将含有酒石酸氢钾的原料（KHT）与氢氧化钾水溶液混合，其中KHT实际上完全反应 形成酒石酸二钾（DKT），然后在pH值为2.0〜5.0的沉淀阶段将含有DKT的水溶液与添加的酸混合，得到含有结晶KHT的悬浮液; 然后将结晶的KHT从悬浮液中分离，用​​水洗涤，并且产生用KHT饱和至少80wt％的溶液，然后除去钾，得到酒石酸水溶液，然后将水 最少部分删除。

    Method for producing acrylic acid
    4.
    发明授权
    Method for producing acrylic acid 有权
    制备丙烯酸的方法

    公开(公告)号：US06498272B1

    公开(公告)日：2002-12-24

    申请号：US09914533

    申请日：2001-08-30

    申请人： Jürgen Schröder ,  Gerhard Nestler ,  Klaus Joachim Müller-Engel

    发明人： Jürgen Schröder ,  Gerhard Nestler ,  Klaus Joachim Müller-Engel

    IPC分类号： C07C5142

    CPC分类号： C07C51/487 ,  B01D3/225 ,  C07C51/43 ,  C07C51/44 ,  C07C51/50 ,  C07C57/04

    摘要： In a process for the preparation of acrylic acid, a product gas mixture obtained by catalytic gas-phase oxidation of a C3-precursor of acrylic acid and containing acrylic acid is directly cooled with a quench liquid and then subjected to fractional condensation in a separation column provided with baffles, said product gas mixture ascending into itself and a crude acrylic acid being removed via a side take-off, and the acrylic acid oligomers formed are cleaved and recycled.

    摘要翻译： 在制备丙烯酸的方法中，通过丙烯酸的C3-前体和含丙烯酸的催化气相氧化获得的产物气体混合物用骤冷液直接冷却，然后在分离塔中进行分级冷凝 设置有挡板，所述产物气体混合物自身上升，粗丙烯酸通过侧移除去，形成的丙烯酸低聚物被切割和再循环。

    Purification of acrylic acid obtained by catalytic oxidation of propylene
    7.
    发明授权
    Purification of acrylic acid obtained by catalytic oxidation of propylene 失效
    通过丙烯的催化氧化获得的丙烯酸的纯化

    公开(公告)号：US06281386B1

    公开(公告)日：2001-08-28

    申请号：US09308756

    申请日：1999-05-25

    申请人： Michel Fauconet ,  Marc Esch ,  Denis Laurent

    发明人： Michel Fauconet ,  Marc Esch ,  Denis Laurent

    IPC分类号： C07C5142

    CPC分类号： C07C51/48 ,  C07C57/04

    摘要： The method consists in extracting acrylic acid by countercurrent filtration washing of reaction gases by at least a hydrophobic absorbing heavy solvent, then recuperating the purified acrylic acid from the solution obtained at the end of this extracting step. As hydrophobic absorbing heavy solvent at least a hydrophobic aromatic compound is used having: a boiling point under atmospheric pressure between 260° C. and 380° C.; a crystallisation temperature less than 35° C. and a viscosity less than 10 mPa·s in a range of temperature between 30-80° C.

    摘要翻译： 该方法包括通过至少一种疏水性吸收重溶剂对反应气体进行逆流过滤洗涤，然后从该提取步骤结束时获得的溶液中回收纯化的丙烯酸来萃取丙烯酸。 作为疏水性吸收重溶剂，使用至少一种疏水性芳香族化合物，其具有260℃至380℃之间的大气压下的沸点。 结晶温度低于35℃，粘度在30-80℃之间的温度范围内低于10mPa.s。

    Reduction of the carbonyl value of carboxylic acids and derivatives of carboxylic acids and derivatives of carboxylic acids
    8.
    发明授权
    Reduction of the carbonyl value of carboxylic acids and derivatives of carboxylic acids and derivatives of carboxylic acids 失效
    羧酸和羧酸衍生物以及羧酸衍生物的羰基值的降低

    公开(公告)号：US06245942B1

    公开(公告)日：2001-06-12

    申请号：US09258229

    申请日：1999-02-26

    申请人： Michael D. Staley

    发明人： Michael D. Staley

    IPC分类号： C07C5142

    CPC分类号： C07C51/487 ,  C07C57/12 ,  C07C53/126

    摘要： A method for reducing the carbonyl value of a composition containing carboxylic acid or carboxylic acid derivative includes contacting the composition containing carboxylic acid or carboxylic acid derivative with an amount of a catalyst and active methylene compound effective to lower the carboxyl value of the composition.

    摘要翻译： 降低含羧酸或羧酸衍生物的组合物的羰基值的方法包括将含有羧酸或羧酸衍生物的组合物与一定量的催化剂和活性亚甲基化合物接触，有效降低组合物的羧基值。

    Method of removing organic iodides from organic media
    9.
    发明授权
    Method of removing organic iodides from organic media 有权
    从有机介质中去除有机碘化物的方法

    公开(公告)号：US06225498B1

    公开(公告)日：2001-05-01

    申请号：US09534868

    申请日：2000-03-24

    申请人： George A. Blay ,  Jerry A. Broussard ,  G. Paull Torrence

    发明人： George A. Blay ,  Jerry A. Broussard ,  G. Paull Torrence

    IPC分类号： C07C5142

    CPC分类号： C07C51/47 ,  B01J39/05 ,  C07C53/08

    摘要： A method of removing organic iodides from non-aqueous organic media includes contacting the organic media with a silver or mercury-exchanged cationic ion exchange substrate at a temperature greater than about 50° C. The method is particularly effective for removing high molecular weight organic iodides from organic media such as acetic acid or acetic anhydride. Particular species removed include decyl iodides and dodecyl iodides from organic media such as acetic acid.

    摘要翻译： 从非水有机介质中除去有机碘化物的方法包括在大于约50℃的温度下使有机介质与银或汞交换的阳离子交换底物接触。该方法对于除去高分子量有机碘化物是特别有效的 从有机介质如乙酸或乙酸酐。 除去特定的物质包括来自有机介质如乙酸的癸基碘化物和十二烷基碘化物。

    Process for purifying long-chain dicarboxylic acid
    10.
    发明授权
    Process for purifying long-chain dicarboxylic acid 有权
    纯化长链二羧酸的方法

    公开(公告)号：US06218574B1

    公开(公告)日：2001-04-17

    申请号：US09453081

    申请日：1999-12-02

    申请人： Shuchen Liu ,  Dacheng Gao ,  Jiangang Zhang

    发明人： Shuchen Liu ,  Dacheng Gao ,  Jiangang Zhang

    IPC分类号： C07C5142

    CPC分类号： C07C51/43 ,  C07C55/02

    摘要： The present invention relates to an aqueous phase process for purifying long-chain dicarboxylic acids from a liquid containing a long-chain dicarboxylic acid/or a salt thereof. The invention overcomes the disadvantages of low purity and high chroma of the product obtained by using the aqueous phase process of the prior art. Through the step of crystallizing the monosalt of long-chain dicarboxylic acid, the present process reduces effectively the content of such impurities as proteins and coloring materials in the product and obtains the long-chain dicarboxylic acid product having a total acid content of greater than 99 wt % and exhibiting a white appearance.

    摘要翻译： 本发明涉及从含有长链二羧酸/或其盐的液体中纯化长链二羧酸的水相方法。 本发明克服了通过使用现有技术的水相方法获得的产品的低纯度和高色度的缺点。 通过使长链二羧酸的单晶结晶的步骤，本方法有效地降低产物中蛋白质和着色材料等杂质的含量，得到总酸含量大于99的长链二羧酸产物 重量％，呈现白色外观。