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    METHOD FOR PRODUCING POLYOXYMETHYLENE DIMETHYL ETHERS FROM FEEDSTOCK OF CONCENTRATED FORMALDEHYDE
    1.
    发明申请
    METHOD FOR PRODUCING POLYOXYMETHYLENE DIMETHYL ETHERS FROM FEEDSTOCK OF CONCENTRATED FORMALDEHYDE 审中-公开
    浓缩甲醛的原料生产聚氧乙烯二甲基醚的方法

    公开(公告)号：US20160168307A1

    公开(公告)日：2016-06-16

    申请号：US14965571

    申请日：2015-12-10

    申请人： Dongfang Hongsheng New Energy Application Technology Research Institute Co., Ltd ,  Jiangsu Kaimao Chemical Technology Co., Ltd ,  China University Of Petroleum (Eastern China)

    发明人： Hongyan SHANG ,  Zhengpeng HONG ,  Zimao YE ,  Jiayong XIANG ,  Zhenzhen XUE

    IPC分类号： C08G16/02

    CPC分类号： C08G2/04 ,  C08G2/06 ,  C08G2/08 ,  C08G2/34

    摘要： The present invention pertains to the technical field of energy resource chemical industry, and in particular relates to a process for producing polyoxymethylene dimethyl ethers by directly using concentrated formaldehyde aqueous solution as feedstock to catalytically react with methanol and/or methylal in a fixed bed reactor. The method of the present invention uses concentrated formaldehyde aqueous solution with a concentration of over 80% by weight to react with methanol and/or methylal, in the presence of an acidic catalyst, to produce the required polyoxymethylene dimethyl ethers. As compared with using paraformaldehyde powder as feedstock, the method of the present invention accelerates the depolymerization process of paraformaldehyde, thus significantly reduces the time required for product synthesis and makes the synthesis reaction able to be carried out in a fixed bed reactor; meanwhile, as compared with using formaldehyde aqueous solution with a low concentration as feedstock, the method of the present invention also significantly increases the yield rate of the target product.

    摘要翻译： 本发明涉及能量化学工业的技术领域，特别涉及通过直接使用浓缩甲醛水溶液作为原料在固定床反应器中与甲醇和/或甲缩醛进行催化反应来生产聚甲醛二甲醚的方法。 本发明的方法使用浓度超过80重量％的浓甲醛水溶液与甲醇和/或甲缩醛在酸性催化剂存在下反应，生成所需的聚甲醛二甲醚。 与使用多聚甲醛粉末作为原料相比，本发明的方法加速了多聚甲醛的解聚过程，从而显着减少了产物合成所需的时间，使合成反应能够在固定床反应器中进行; 同时，与使用低浓度的甲醛水溶液作为原料相比，本发明的方法也显着提高了目标产物的产率。

    Method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a slurry bed
    5.
    发明授权
    Method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a slurry bed 有权
    通过使用浆料床的催化氢化来精制聚甲醛二烷基醚的方法

    公开(公告)号：US09090842B2

    公开(公告)日：2015-07-28

    申请号：US14257215

    申请日：2014-04-21

    申请人： Dongfang Hongsheng New Energy Application Technology Research Institute Co., Ltd

    发明人： Zhengpeng Hong ,  Hongyan Shang ,  Xiaoting Feng

    IPC分类号： C10L1/02 ,  C08L59/02 ,  C08G2/28 ,  C08G2/34 ,  C07C29/141 ,  C07C41/56

    CPC分类号： C10L1/02 ,  C07C29/141 ,  C07C41/56 ,  C08G2/28 ,  C08G2/34 ,  C08L59/02 ,  C07C43/303 ,  C07C31/04

    摘要： The present invention relates to a method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a slurry bed, wherein, using a slurry bed reactor for refining by hydrogenation, an equilibrium system containing polyoxymethylene dialkyl ethers products is refined by catalytic hydrogenation, so as to remove formaldehyde contained therein. The refining method by hydrogenation described in the present invention can remarkably increase the separation and purification efficiency of polyoxymethylene dialkyl ethers, and the polyoxymethylene dialkyl ethers obtained after subsequent rectification have a purity greater than 99.5%, a product yield greater than 97% and an atom utilization ratio close to 100%.

    摘要翻译： 本发明涉及一种通过使用淤浆床的催化氢化来精制聚甲醛二烷基醚的方法，其中使用浆床反应器通过氢化进行精制，含有聚甲醛二烷基醚产物的平衡体系通过催化氢化来精制，以除去 其中含有甲醛。 通过本发明描述的氢化精炼方法可以显着提高聚甲醛二烷基醚的分离和提纯效率，随后精馏后得到的聚甲醛二烷基醚的纯度大于99.5％，产物收率大于97％，原子 利用率接近100％。

    REACTION SYSTEM AND PROCESS FOR PREPARING POLYMETHOXY DIMETHYL ETHER
    6.
    发明申请
    REACTION SYSTEM AND PROCESS FOR PREPARING POLYMETHOXY DIMETHYL ETHER 有权
    反应体系及制备聚二甲基乙烯醚的方法

    公开(公告)号：US20150094497A1

    公开(公告)日：2015-04-02

    申请号：US14218552

    申请日：2014-03-18

    申请人： Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences ,  Suzhou OST Advanced Materials Co., Ltd.

    发明人： Jing Chen ,  Heyuan Song ,  Chungu Xia ,  Meirong Kang

    IPC分类号： C07C41/01 ,  B01D3/00

    CPC分类号： B01J14/00 ,  B01D3/009 ,  B01J2219/00006 ,  C07C41/01 ,  C07C41/56 ,  C07C41/58 ,  C08G2/06 ,  C08G2/08 ,  C08G2/34 ,  Y02P20/584 ,  C07C43/30

    摘要： The invention relates to a reaction system and process for continuously preparing polymethoxy dimethyl ether (DMM3-8) by a continuous acetalization reaction between an aqueous formaldehyde solution or paraformaldehyde and methanol in the presence of a functionalized acidic ionic liquid as a catalyst. The reaction system of the invention preferably comprises a formaldehyde-concentrating unit, a vacuum-drying unit, an acetalization reaction unit, a product-separating unit and a catalyst-regenerating unit. The process of the invention uses aqueous formaldehyde solution as an initial raw material, which is concentrated in the formaldehyde-concentrating unit to a concentrated formaldehyde of 50˜80 wt. %, and vacuum-dried to paraformaldehyde, or uses paraformaldehyde as raw material directly, then obtains DMM3-8 by an acetalization reaction. The raw materials of the reaction used in the invention are cheap and available easily, and the utilization rate of formaldehyde is high; an efficient separation between the catalyst and product, as well as the reuse of the catalyst and raw materials, are realized by a separation mode of combining extraction and rectification together.

    摘要翻译： 本发明涉及在官能化酸性离子液体作为催化剂存在下，通过甲醛水溶液或多聚甲醛与甲醇之间的连续缩醛化反应连续制备聚甲氧基二甲醚（DMM3-8）的反应体系和方法。 本发明的反应体系优选包含甲醛浓缩单元，真空干燥单元，缩醛化反应单元，产物分离单元和催化剂再生单元。 本发明的方法使用甲醛水溶液作为初始原料，其将浓缩在甲醛浓缩装置中的浓缩甲醛为50〜80wt。 ％，真空干燥至多聚甲醛，或直接用多聚甲醛为原料，通过缩醛化反应得到DMM3-8。 本发明中使用的反应原料便宜且易于使用，甲醛的利用率高; 催化剂和产物之间的有效分离以及催化剂和原料的再利用通过将萃取和精馏结合在一起的分离模式来实现。

    Process for improving the stability of acetal polymers
    8.
    发明授权
    Process for improving the stability of acetal polymers 失效
    改进缩醛聚合物稳定性的方法

    公开(公告)号：US4268643A

    公开(公告)日：1981-05-19

    申请号：US088250

    申请日：1979-10-25

    申请人： Pierino Radici ,  Sergio Custro ,  Paolo Colombo

    发明人： Pierino Radici ,  Sergio Custro ,  Paolo Colombo

    IPC分类号： C08G2/32 ,  C08G2/34 ,  C08G6/00

    CPC分类号： C08G2/34 ,  C08G2/32

    摘要： The terminal hydroxyl groups of an acetal polymer are esterified or etherified by reaction with an end-capping agent chosen from anhydrides of carboxylic acids, orthoesters and orthocarbonates, by forming an intimate mixture of polymer in powder form and liquid end-capping agent, the amount of said agent in the mixture being less than that which results in loss of the free-flowing characteristics of the powder, and reacting said mixture under stirring at 50.degree.-170.degree. C.

    摘要翻译： 通过与选自羧酸，原酸酯和原碳酸酯的酸酐的封端剂反应，通过形成粉末形式的聚合物和液体封端剂的紧密混合物，缩醛聚合物的末端羟基被酯化或醚化， 所述混合物中的所述试剂的摩尔比小于粉末的自由流动特性的损失，并且在搅拌下使所述混合物在50-170℃下反应。

    Process for the stabilization of polyacetal reins
    9.
    发明授权
    Process for the stabilization of polyacetal reins 失效
    聚合物纤维素稳定化的方法

    公开(公告)号：US3998791A

    公开(公告)日：1976-12-21

    申请号：US605949

    申请日：1975-08-19

    申请人： Pierino Radici ,  Sergio Custro ,  Paolo Colombo

    发明人： Pierino Radici ,  Sergio Custro ,  Paolo Colombo

    IPC分类号： C08G2/34 ,  C08G2/32

    CPC分类号： C08G2/34

    摘要： Process for the stabilization of polyacetal resins having terminal hydroxyl groups, which comprises reacting a reagent capable of etherifying the hydroxyl groups with the polyacetal resins suspended in a reaction medium that is liquid under the conditions used, the said reaction medium consisting of at least one substance that is a solvent for the polymer and at least one substance that is a non-solvent for the polymer, the said solvent and non-solvent substances being completely miscible at the reaction temperatures but immiscible or partly miscible at temperature substantially lower than the reaction temperatures, and carrying out the operation in the presence of catalytic quantities of one or more compounds selected from the groups consisting ofA. strong or medium-strong mineral acids whose acid dissociation constant or first acid dissociation constant is higher than 10.sup..sup.-7 ;B. strong or medium-strong oganic acids whose acid dissociation constant is higher than 10.sup..sup.-6 ;C. alkyl, cycloalkyl, or alkylaromatic esters of strong or medium-strong mineral acids;D. alkyl, cycloalkyl or alkylaromatic esters of strong or medium-strong organic acids.