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    • 2. 发明授权
    • Process and apparatus for combined milling and drying
    • 联合研磨和干燥的方法和设备
    • US06880772B2
    • 2005-04-19
    • US10277514
    • 2002-10-22
    • Hartwig SchlesigerMartin MorningGerd SonnenbergRudolf Heidemann
    • Hartwig SchlesigerMartin MorningGerd SonnenbergRudolf Heidemann
    • B02C21/00B02C23/10B02C23/28B02C23/34C08B1/00C08B11/20F26B1/00F26B21/00F26B21/04F26B25/00B02C11/08
    • B02C23/34C08B11/20F26B1/005F26B21/002F26B21/04F26B25/007
    • 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).
    • 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。
    • 5. 发明授权
    • Process and apparatus for the industrial preparation of methylhydroxyalkylcellulose
    • 用于工业制备甲基羟烷基纤维素的方法和设备
    • US06667395B2
    • 2003-12-23
    • US10241711
    • 2002-09-11
    • Torsten HoltkötterStefan MichelGerd Sonnenberg
    • Torsten HoltkötterStefan MichelGerd Sonnenberg
    • C08B1100
    • C08B17/06C08B11/193
    • 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.
    • 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。