Process for producing dimethylcyanamide
    1.
    发明授权
    Process for producing dimethylcyanamide 失效
    二甲基氰胺的制备方法

    公开(公告)号:US06262304B1

    公开(公告)日:2001-07-17

    申请号:US09630141

    申请日:2000-07-31

    IPC分类号: C07C27708

    CPC分类号: C07C261/04

    摘要: Cyanogen chloride and dimethylamine are reacted in a water/organic solvent system. The organic solvent is immiscible with water. After the completion of reaction, the water-immiscible organic solvent is distilled away from the reaction product solution to carry out the subsequent synthesis of 1,1,3,3-tetramethylguanidine in an aqueous system.

    摘要翻译: 氯化氰和二甲胺在水/有机溶剂体系中反应。 有机溶剂与水不混溶。 反应完成后,将水不混溶的有机溶剂从反应产物溶液中蒸馏除去,以在水系统中进行随后的1,1,3,3-四甲基胍的合成。

    Production of tricyclodecane dicarbaldehyde, pentacyclopentadecane dicarbaldehyde and corresponding dimethanols
    2.
    发明授权
    Production of tricyclodecane dicarbaldehyde, pentacyclopentadecane dicarbaldehyde and corresponding dimethanols 有权
    生产三环癸二醛,五环十五烷二甲醛和相应的二甲醇

    公开(公告)号:US06365782B1

    公开(公告)日:2002-04-02

    申请号:US09609374

    申请日:2000-07-03

    IPC分类号: C07C4550

    摘要: A method of producing tricyclodecane dicarbaldehyde and/or pentacyclopentadecane dicarbaldehyde by the hydroformylation of dicyclopentadiene and/or tricyclopentadiene. The tricyclodecane dicarbaldehyde and/or pentacyclopentadecane dicarbaldehyde in the hydroformylation product liquid are extracted with an extraction solvent comprising a polyhydric alcohol having 2 to 6 carbon atoms. With such extraction, the tricyclodecane dicarbaldehyde and/or pentacyclopentadecane dicarbaldehyde transfer into the extraction solvent while retaining the catalyst components in the hydroformylation solvent. The controlled extraction atmosphere with an oxygen concentration of 1000 ppm or lower prevents the rhodium compound from transferring into the extraction solvent, thereby avoiding the loss of expensive rhodium. The extraction solvent containing tricyclodecane dicarbaldehyde and/or pentacyclopentadecane dicarbaldehyde as such can be directly subjected to catalytic hydrogenation to produce corresponding tricyclodecane dimethanol and/or pentacyclopentadecane dimethanol.

    摘要翻译: 通过二环戊二烯和/或三环戊二烯的加氢甲酰化生产三环癸二醛和/或五环十五烷二醛的方法。 加氢甲酰化产物液中的三环癸烷二醛和/或五环十五烷二甲醛用包含具有2至6个碳原子的多元醇的提取溶剂萃取。 通过这样的提取,将三环癸烷二醛和/或五环十五烷二醛转移到萃取溶剂中,同时将催化剂组分保留在加氢甲酰化溶剂中。 氧浓度为1000ppm以下的受控提取气氛防止铑化合物转移到萃取溶剂中,从而避免昂贵的铑的损失。 可以直接对含有三环癸烷二醛和/或五环十五烷二醛的提取溶剂进行催化氢化以产生相应的三环癸烷二甲醇和/或五环十五烷二甲醇。