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    METHOD FOR PREPARING REACTIVE SEALANT RESIN
    2.
    发明申请
    METHOD FOR PREPARING REACTIVE SEALANT RESIN 有权

    公开(公告)号：US20220056209A1

    公开(公告)日：2022-02-24

    申请号：US17413858

    申请日：2018-12-27

    申请人： WANHUA CHEMICAL GROUP CO., LTD. ,  WANHUA CHEMICAL (NINGBO) CO., LTD.

    发明人： Changxun Ju ,  Bin Liu ,  Mingyong Wang ,  Tian Ye ,  Zhengyang Shi ,  Yuan Li ,  Weiqi Hua

    IPC分类号： C08G65/336 ,  C08G65/26 ,  C09J171/02 ,  B01J23/42 ,  C08L75/04

    摘要： Disclosed by the present invention is a method for preparing a reactive sealant resin, the method comprising: (1) under the action of an alkali catalyst, polymerizing a hydroxyl-containing initiator with an epoxy compound to obtain a polyether polyol; (2) adding an alkoxide reagent and a halogenated end-capping agent containing a double bond to the polyether polyol obtained in step (1) for reaction, so as to obtain a crude double-bonded polyether product, and refining the crude product to obtain a modified polyether product; and (3) subjecting the modified polyether and hydrogen-containing silane to silane end-capping reaction under the action of a hydrosilylation catalyst, so as to obtain the target product, i.e., a reactive sealant resin. The resin has excellent properties as well as good adhesion and paintability.

    Catalyst For Preparing a-Phenylethanol By Hydrogenation Of Acetophenone, Preparation Method Thereof And Application Thereof
    3.
    发明申请
    Catalyst For Preparing a-Phenylethanol By Hydrogenation Of Acetophenone, Preparation Method Thereof And Application Thereof 审中-公开

    公开(公告)号：US20200282388A1

    公开(公告)日：2020-09-10

    申请号：US16763865

    申请日：2018-06-29

    申请人： Wanhua Chemical Group Co., Ltd.

    发明人： Zuojin Li ,  Haibo Yu ,  Jishan Zhan ,  Yu Sha ,  Naibo Chu ,  Yuan Li ,  Weiqi Hua

    IPC分类号： B01J37/00 ,  B01J23/83 ,  B01J23/00 ,  B01J37/18 ,  B01J37/08 ,  B01J37/03 ,  C07C29/145

    摘要： Disclosed is a preparation method of a catalyst for liquid phase hydrogenation of acetophenone in preparation of α-phenylethanol, including: adding water, a small alcohol, a Gemini surfactant and an organic pore-forming agent to a reactor, followed by adding a silica sol and stirring well to prepare an aqueous dispersion of silica sol; preparing an alkaline precipitant and a mixed solution containing salts of a copper containing compound, a zinc containing compound, a rare-earth metal containing compound and an alkaline-earth metal containing compound, adding the alkaline precipitant and the mixed solution together to the aqueous dispersion of silica sol, followed by precipitation, ageing, filtration, washing, drying, calcination and molding to obtain the catalyst. By using silica sol and silicate as a composite silicon source, adding an organic pore-forming agent before the precipitation process, and modifying the catalyst by Zn, rare-earth metal and alkaline earth metal, when using in the liquid phase hydrogenation of acetophenone to prepare α-phenylethanol, the catalyst of the present invention not only has high activity and good selectivity, but also effectively improves the liquid resistance of the catalyst, the catalyst also has high strength and good stability.

    Method for preparing hydroxyethyl (meth) acrylate
    6.
    发明授权
    Method for preparing hydroxyethyl (meth) acrylate 有权

    公开(公告)号：US09845281B2

    公开(公告)日：2017-12-19

    申请号：US15300566

    申请日：2014-07-29

    申请人： Wanhua Chemical Group Co., Ltd.

    发明人： Junping Li ,  Haibo Chen ,  Lichang Zhang ,  Chunxian Cui ,  Yuan Li ,  Weiqi Hua ,  Jiansheng Ding ,  Junhua Zhang ,  Zhaokun Cheng

    IPC分类号： C07C67/26 ,  C08F220/06

    CPC分类号： C07C67/26 ,  C07C69/54 ,  C08F220/06

    摘要： Hydroxyethyl (methyl)acrylate is prepared by a process of a combination of a three-stage tubular reactor and a tower reactor, wherein, firstly, a catalyst, a polymerization inhibitor and (methyl) acrylic acid are mixed until the solids are dissolved, then mixed with a part of ethylene oxide and thereafter enter into a first tubular reactor for a reaction, a reaction liquid flowing out from the first tubular reactor is mixed with a certain amount of ethylene oxide and enters into a second tubular reactor for a reaction, a reaction liquid flowing out from the second tubular reactor is then mixed with a certain amount of ethylene oxide and thereafter enters into a third tubular reactor, and a reaction liquid flowing out from the third tubular reactor is then passed through a stage of an adiabatic tower reactor and aged such that a product liquid is obtained from extraction.

    PREPARATION METHOD FOR OPTICALLY ACTIVE CITRONELLAL
    9.
    发明申请
    PREPARATION METHOD FOR OPTICALLY ACTIVE CITRONELLAL 有权

    公开(公告)号：US20230043867A1

    公开(公告)日：2023-02-09

    申请号：US17784015

    申请日：2019-12-09

    申请人： WANHUA CHEMICAL GROUP CO., LTD.

    发明人： Jing Dong ,  Lei Yu ,  Yongzhen Zhang ,  Yuan Li

    IPC分类号： C07C45/62 ,  C07C45/82 ,  B01J31/28

    摘要： A preparation method for optically active citronellal, which can obviously enhance the catalytic stability of an optically active transition metal catalyst for asymmetric hydrogenation of homogeneous catalysis and thereby achieve higher turnover numbers. In the preparation method for optically active citronellal, a substrate is subjected to an asymmetric hydrogenation reaction in the presence of the transition metal catalyst to generate the optically active citronellal, wherein the transition metal catalyst is obtained by reacting a transition metal compound with an optically active ligand containing two phosphorus atoms, and the raw material of the substrate is one of neral and geranial or a combination thereof to control the hydroxyl value to be less than or equal to 6 mgKOH/g and/or the iron content to be less than or equal to 50 ppm in the raw material of the substrate for the asymmetric hydrogenation reaction.