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14 条记录 (耗时 0.016 秒)

    Process for the production of spherulitic particles
    2.
    发明授权
    Process for the production of spherulitic particles 失效
    生产球晶颗粒的方法

    公开(公告)号：US5696407A

    公开(公告)日：1997-12-09

    申请号：US731174

    申请日：1996-10-07

    申请人： Klaus-Dieter Thiel ,  Herbert Heinisch

    发明人： Klaus-Dieter Thiel ,  Herbert Heinisch

    IPC分类号： C07C277/06 ,  C06B21/00 ,  C06B25/00 ,  C06B25/34 ,  C07C277/08 ,  C07C279/06 ,  C07C279/34

    CPC分类号： C07C277/08 ,  C06B21/0091 ,  C06B25/34 ,  C07C279/34 ,  Y10S149/111

    摘要： In the production of spherulitic nitroguanidine having a high bulk and tap ensity nitroguanidine is dissolved in dipolar, aprotic solvents, e.g. DMF, DMSO, NMP, etc., by heating to above the saturation temperature t.sub.s and the supersaturated solution is cooled with a controlled temperature gradient (.degree.C./min), crystallization being assisted by the addition of particulate, spherulitic material. In order to obtain spherical nitroguanidine with high yield in a continuous process and with mother liquor reuse, during the heating to above the saturation temperature t.sub.s, spherical control particles with a diameter of 5 to 500 .mu.m are regularly added to the solution in a quantity of 0.05 to 5.00 mass %. The particle size is chosen in such a way that, as a function of the solution behaviour of the nitroguanidine used and its concentration, on dropping below the saturation temperature spherical control particles are still present in the indicated quantity in the supersaturated solution.

    摘要翻译： 在生产具有高体积和振实密度的球形硝基胍的情况下，将硝基胍溶解于偶极，非质子溶剂，例如， DMF，DMSO，NMP等，通过加热到饱和温度ts以上，过饱和溶液用受控的温度梯度（℃/ min）冷却，通过加入颗粒状球晶材料来辅助结晶。 为了在连续的方法中获得高产率的球形硝基胍，并且在母液再利用中，在加热到高于饱和温度ts之前，将一定直径为5至500μm的球形控制颗粒定量地添加到溶液中 为0.05〜5.00质量％。 选择粒径是这样一种方式：使用的硝基胍的溶液行为及其浓度随着饱和温度的降低而降低，球形控制颗粒在过饱和溶液中仍以指定量存在。

    Continuous process for crystallizing nitroguanidine
    6.
    依法登记的发明
    Continuous process for crystallizing nitroguanidine 失效
    硝基胍结晶的连续方法

    公开(公告)号：USH1510H

    公开(公告)日：1995-12-05

    申请号：US210881

    申请日：1988-06-23

    申请人： Steven L. Collignon ,  Kerry L. Wagaman

    发明人： Steven L. Collignon ,  Kerry L. Wagaman

    IPC分类号： C07C279/34 ,  C07C277/08

    CPC分类号： C07C279/34

    摘要： A continuous process for forming spheroidal high bulk density nitroguanid crystals from an aqueous solution of nitroguanidine which contains methylcellulose and partially hydrolyzed poly(vinyl alcohol) as crystal habit modifiers. A saturated aqueous solution of nitroguanidine is formed at a temperature T.sub.1 where 70.degree. C..ltoreq.T.sub.1 .ltoreq.100.degree. C. and crystallization occurs at a lower temperature T.sub.2 where 20.degree. C..ltoreq.T.sub.1 -T.sub.2 .ltoreq.50.degree. C.

    摘要翻译： 从含有甲基纤维素和部分水解的聚（乙烯醇）作为晶体习性调节剂的硝基胍水溶液形成球状高体积密度硝基胍晶体的连续方法。 在70℃的温度T1下形成饱和的硝基胍水溶液。在20℃的较低温度T2下进行结晶。

    Spherical nitroguanidine process
    10.
    发明授权
    Spherical nitroguanidine process 失效
    球形硝基胍工艺

    公开(公告)号：US4967000A

    公开(公告)日：1990-10-30

    申请号：US406010

    申请日：1989-09-12

    申请人： John A. Sanchez ,  Edward L. Roemer ,  Lawrence A. Stretz

    发明人： John A. Sanchez ,  Edward L. Roemer ,  Lawrence A. Stretz

    IPC分类号： C07C277/08 ,  C07C279/34

    CPC分类号： C07C279/34 ,  C07C277/08

    摘要： A process of preparing spherical high bulk density nitroguanidine by dissing low bulk density nitroguanidine in N-methyl pyrrolidone at elevated temperatures and then cooling the solution to lower temperatures as a liquid characterized as a nonsolvent for the nitroguanidine is provided. The process is enhanced by inclusion in the solution of from about 1 ppm up to about 250 ppm of a metal salt such as nickel nitrate, zinc nitrate or chromium nitrate, preferably from about 20 to about 50 ppm.

    摘要翻译： 提供了通过在高温下将低体积密度的硝基胍溶解在N-甲基吡咯烷酮中制备球形高体积密度的硝基胍的方法，然后将该溶液冷却至较低温度，作为以硝基胍为非溶剂的液体。 该方法通过在约1ppm至约250ppm的金属盐如硝酸镍，硝酸锌或硝酸铬中的溶液中包含，优选约20至约50ppm来增强。