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    Process and apparatus for combined milling and drying
    3.
    发明授权
    Process and apparatus for combined milling and drying 有权
    联合研磨和干燥的方法和设备

    公开(公告)号：US06880772B2

    公开(公告)日：2005-04-19

    申请号：US10277514

    申请日：2002-10-22

    申请人： Hartwig Schlesiger ,  Martin Morning ,  Gerd Sonnenberg ,  Rudolf Heidemann

    发明人： Hartwig Schlesiger ,  Martin Morning ,  Gerd Sonnenberg ,  Rudolf Heidemann

    IPC分类号： B02C21/00 ,  B02C23/10 ,  B02C23/28 ,  B02C23/34 ,  C08B1/00 ,  C08B11/20 ,  F26B1/00 ,  F26B21/00 ,  F26B21/04 ,  F26B25/00 ,  B02C11/08

    CPC分类号： B02C23/34 ,  C08B11/20 ,  F26B1/005 ,  F26B21/002 ,  F26B21/04 ,  F26B25/007

    摘要： A process of both milling and drying a solvent-moist material (e.g., water-moist methylhydroxyethylcellulose) is described. The process includes, (a) providing a mill-dryer (100) which includes, in series, a heat exchanger (1), a mill (2) and a particulate separating apparatus (105) connected by conduits (8), (9) and (11, 12), which together define a mill-dryer circuit (103). The mill-dryer (100) also includes a bypass conduit (14), which provides optionally at least partial gaseous bypass of the heat exchanger (1). The process further includes: (b) introducing the solvent-moist material into the mill (2); (c) circulating a vapor stream (e.g., a steam/air stream) throughout the mill-dryer circuit (103); (d) heating the vapor stream by means of passage through the heat-exchanger (1); (e) forwarding milled particulate material from the mill (2) to the particulate separating apparatus (105) by means of conduit (9); (f) separating the particulate material from the vapor stream in the particulate separating apparatus (105); (g) forwarding the vapor stream from the particulate separating apparatus (105) through conduits (11, 12); and (h) controlling the temperature of the vapor stream by optionally forwarding at least some of the vapor stream through the bypass line (14).

    摘要翻译： 描述了研磨和干燥溶剂 - 湿物质（例如水 - 湿甲基羟乙基纤维素）的方法。 该方法包括：（a）提供一个包括串联的热交换器（1），研磨机（2）和通过导管（8），（9）连接的颗粒分离装置 ）和（11,12），它们共同限定了一个烘干机电路（103）。 研磨机（100）还包括旁通管道（14），其可选地提供热交换器（1）的至少部分气体旁路。 该方法还包括：（b）将溶剂湿物质引入磨机（2）中; （c）在蒸干机回路（103）中循环蒸气流（例如蒸汽/空气流）; （d）通过通过热交换器（1）的蒸气流加热; （e）通过导管（9）将磨碎的颗粒材料从研磨机（2）转送到颗粒分离装置（105）; （f）在颗粒分离装置（105）中分离颗粒材料与蒸汽流的分离; （g）通过导管（11,12）将来自颗粒分离装置（105）的蒸汽流送出; 和（h）通过任选地将至少一些蒸气流转运通过旁路管线（14）来控制蒸气流的温度。

    Process for producing particulate, water-soluble cellulose derivatives using a superheated gas mixture containing steam
    4.
    发明授权
    Process for producing particulate, water-soluble cellulose derivatives using a superheated gas mixture containing steam 有权
    使用含有蒸汽的过热气体混合物生产微粒状水溶性纤维素衍生物的方法

    公开(公告)号：US07259257B2

    公开(公告)日：2007-08-21

    申请号：US09785905

    申请日：2001-02-16

    申请人： Hartwig Schlesiger ,  Martin Morning ,  Gunter Weber ,  Volker Eckhardt ,  Gerd Sonnenberg ,  René Kiesewetter

    发明人： Hartwig Schlesiger ,  Martin Morning ,  Gunter Weber ,  Volker Eckhardt ,  Gerd Sonnenberg ,  René Kiesewetter

    IPC分类号： C08B11/20

    CPC分类号： C08J3/12 ,  C08B11/20 ,  C08J2301/08

    摘要： The present invention relates to a new, particularly economical process for preparing particulate water-soluble cellulose derivatives. The process involves forming a feed composition of swollen and/or dissolved cellulose derivative, and water. The feed composition is contacted with a superheated gas mixture, in a sieve-free high rotational speed gas jet impact mill, and the cellulose derivative of the feed composition is converted into a solid state form of finely particulate particles. The superheated gas mixture, with which the feed composition is contacted, is selected from: (i) a superheated gaseous mixture of steam and an inert gas; and (ii) a superheated gas mixture of steam and air. The superheated gas mixture has a steam content of 40 wt. % to 99 wt. %, based on the total weight of the superheated gas mixture.

    摘要翻译： 本发明涉及一种制备颗粒状水溶性纤维素衍生物的新的，特别经济的方法。 该方法包括形成溶胀和/或溶解的纤维素衍生物和水的进料组合物。 在无筛的高转速气体冲击式研磨机中使进料组合物与过热气体混合物接触，并将进料组合物的纤维素衍生物转化为固态形式的细颗粒颗粒。 进料组合物与其接触的过热气体混合物选自：（i）蒸汽和惰性气体的过热气态混合物; 和（ii）蒸汽和空气的过热气体混合物。 过热气体混合物的蒸汽含量为40wt。 ％至99重量％ ％，基于过热气体混合物的总重量。

    Process and apparatus for the industrial preparation of methylhydroxyalkylcellulose
    5.
    发明授权
    Process and apparatus for the industrial preparation of methylhydroxyalkylcellulose 有权
    用于工业制备甲基羟烷基纤维素的方法和设备

    公开(公告)号：US06667395B2

    公开(公告)日：2003-12-23

    申请号：US10241711

    申请日：2002-09-11

    申请人： Torsten Holtkötter ,  Stefan Michel ,  Gerd Sonnenberg

    发明人： Torsten Holtkötter ,  Stefan Michel ,  Gerd Sonnenberg

    IPC分类号： C08B1100

    CPC分类号： C08B17/06 ,  C08B11/193

    摘要： A description is given of a process for the industrial preparation of methylhydroxyalkylcelluloses (MHACs) by reaction of cellulose with alkali metal hydroxide and subsequent reaction with an alkyl halide and hydroxyalkylating agent, characterized in that the reaction is carried out batchwise in a reactor which has an L/D ratio of less than 2.5 and in which the unmixed regions are minimized and the batch reactor is preceded at the inlet by a continuously operated cellulose milling facility and is followed at the outlet by a continuously running plant for milling and drying the products, with the product being transported by action of gravity. An apparatus for carrying out this process and the methylhydroxyalkylcellulose obtainable by the process are also described.

    摘要翻译： 给出了通过纤维素与碱金属氢氧化物的反应和随后与烷基卤化物和羟烷基化剂的反应来工业制备甲基羟基烷基纤维素（MHAC）的方法的描述，其特征在于反应在具有 L / D比小于2.5，其中未混合区域最小化，并且间歇反应器在入口之前通过连续操作的纤维素研磨设备，并且在出口处通过连续运行的设备进行研磨和干燥， 产品通过重力作用运输。还描述了用于进行该方法的设备和通过该方法可获得的甲基羟烷基纤维素。