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    PROCESS FOR PREPARING DICHLOROPROPANOL
    3.
    发明申请
    PROCESS FOR PREPARING DICHLOROPROPANOL 有权

    公开(公告)号：US20170174593A1

    公开(公告)日：2017-06-22

    申请号：US15263727

    申请日：2016-09-13

    申请人： CHANG CHUN PLASTICS CO., LTD.

    发明人： Chien-Fu Huang ,  Cheng-Hui Chan

    IPC分类号： C07C29/62 ,  C07C29/80

    CPC分类号： C07C29/62 ,  C07C29/80 ,  C07C29/86 ,  C07C31/42 ,  C07C31/36

    摘要： Provided is a process of preparing dichloropropanol, DCP. The process includes the step of: subjecting a three-carbon material to a first chlorination reaction with an aqueous hydrochloric acid solution in the presence of a carboxylic acid catalyst; adding the three-carbon material into the first mixture solution to undergo a second chlorination reaction and obtain a second mixture solution containing less than 13 wt % of hydrochloric acid; distilling the second mixture solution; and purifying the overhead product by oil-water separation to obtain DCP from the oil phase. By lowering the concentration of the hydrochloric acid contained in the mixture to be distilled, the DCP product can be straightly obtained via distillation and oil-water separation, thereby effectively simplifying the process of preparing DCP.

    METHOD OF SYNTHESIS OF SUBSTITUTED HEXITOLS SUCH AS DIANHYDROGALACTITOL
    8.
    发明申请
    METHOD OF SYNTHESIS OF SUBSTITUTED HEXITOLS SUCH AS DIANHYDROGALACTITOL 有权
    合成替代HEXITOLS等作为二氢吡咯烷酮的方法

    公开(公告)号：US20150329511A1

    公开(公告)日：2015-11-19

    申请号：US14550131

    申请日：2014-11-21

    申请人： DEL MAR PHARMACEUTICALS

    发明人： Dennis M. BROWN ,  Mike Tso-Ping LI

    IPC分类号： C07D301/24 ,  C07D303/14 ,  C07C29/62

    CPC分类号： C07D301/24 ,  C07C29/62 ,  C07D303/14 ,  C07D493/04

    摘要： The present invention provides an efficient method of synthesizing and purifying dianhydrohexitols such as dianhydrogalactitol. In general, as applied to dianhydrogalactitol, the method comprises: (1) reacting dulcitol with a concentrated solution of hydrobromic acid at a temperature of about 80° C. to produce dibromogalactitol; (2) reacting the dibromogalactitol with potassium carbonate in t-butanol to produce dianhydrogalactitol; and (3) purifying the dianhydrogalactitol using a slurry of ethyl ether to produce purified dianhydrogalactitol. Another method produces dianhydrogalactitol from dulcitol; this method comprises: (1) reacting dulcitol with a reactant to convert the 1,6-hydroxy groups of dulcitol to an effective leaving group to generate an intermediate; and (2) reacting the intermediate with an inorganic weak base to produce dianhydrogalactitol through an intramolecular SN2 reaction. Other methods for the synthesis of dianhydrogalactitol from dulcitol are described.

    摘要翻译： 本发明提供了合成和纯化二脱水己糖醇如二脱水半乳糖醇的有效方法。 通常，应用于二氢半乳糖醇时，该方法包括：（1）在约80℃的温度下使糊精与氢溴酸的浓缩溶液反应，生产二溴乳糖醇; （2）使二溴乳糖醇与碳酸钾在叔丁醇中反应，生成二脱水半乳糖; 和（3）使用乙醚的浆液纯化二脱水半乳糖醇以产生纯化的二脱水半乳糖醇。 另一种方法由二糖醇制得二脱水半乳糖醇; 该方法包括：（1）使杜仲醇与反应物反应，以将曲奇醇的1,6-羟基转化为有效的离去基团以产生中间体; 和（2）使中间体与无机弱碱反应，通过分子内SN2反应产生二脱水半乳糖。 描述了从杜尔醇醇合成二脱水半乳糖醇的其它方法。

    Method for preparing chlorohydrins and method for preparing epichlorohydrin using chlorohydrins prepared thereby
    9.
    发明授权
    Method for preparing chlorohydrins and method for preparing epichlorohydrin using chlorohydrins prepared thereby 有权
    氯氢化物的制备方法和由此制备的氯代醇制备表氯醇的方法

    公开(公告)号：US08969630B2

    公开(公告)日：2015-03-03

    申请号：US13805750

    申请日：2011-06-08

    申请人： Won Seob Song ,  Sung Yul Woo ,  Boo Weon Song ,  Seong Han Park ,  Myoung Suk Kwon

    发明人： Won Seob Song ,  Sung Yul Woo ,  Boo Weon Song ,  Seong Han Park ,  Myoung Suk Kwon

    IPC分类号： C07C31/34 ,  C07D301/02 ,  C07C29/62 ,  C07D303/08

    CPC分类号： C07C29/62 ,  C07D303/08 ,  C07C31/36

    摘要： A method of preparing chlorohydrins and a method of preparing epichlorohydrin by using chlorohydrins prepared using the method are provided. The method of preparing chlorohydrins by reacting polyhydroxy aliphatic hydrocarbon with a chlorination agent in the presence of a catalyst includes at least one combination of a series of unit operations including a first reaction step, a water removal step, and a second reaction step, in that respective order, wherein the method further includes purifying chlorohydrins from a reaction mixture discharged from a final reaction step of the plurality of reaction steps. The method of preparing epichlorohydrin includes reacting chlorohydrins prepared using the method of preparing chlorohydrins, with an alkaline agent.

    摘要翻译： 提供了一种制备氯代醇的方法和一种使用该方法制备的使用氯代醇制备表氯醇的方法。 通过在催化剂存在下使多羟基脂族烃与氯化剂反应制备氯代醇的方法包括一系列单元操作的组合，包括第一反应步骤，除水步骤和第二反应步骤，其中 其中所述方法还包括从多个反应步骤的最终反应步骤排出的反应混合物中纯化氯代醇。 制备表氯醇的方法包括使用制备氯代醇的方法制备的氯代醇与碱性试剂反应。