发明授权
- 专利标题： Process for the modification of the crystal form of dicyandiamide
- 专利标题（中）： 双氰胺晶体形式的改性方法
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申请号： US547673申请日： 1983-11-01
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公开(公告)号： US4560796A公开(公告)日： 1985-12-24
- 发明人: Gerhard Smutek , Hermann Raveling
- 申请人： Gerhard Smutek , Hermann Raveling
- 申请人地址： DEX Trostberg
- 专利权人： SKW Trostberg Aktiengesellschaft
- 当前专利权人： SKW Trostberg Aktiengesellschaft
- 当前专利权人地址： DEX Trostberg
- 优先权： DEX3241070 19821106
- 主分类号： C07C279/28
- IPC分类号： C07C279/28 ; C07C20060101 ; C07C129/14
摘要：
The present invention provides a process for the modification of the crystal form of dicyandiamide, wherein dicyandiamide is crystallized from aqueous solution in the presence of 0.001 to 10% by weight of polyvinyl alcohol and/or of a water-soluble cellulose ether derivative, referred to the amount of dicyandiamide. The crystalline dicyandiamide obtained in this manner has outstanding flow and storage properties and its mechanical strength is substantially improved.
公开/授权文献
- US5730556A Removable ground anchor 公开/授权日：1998-03-24
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