Process for the preparation of trimethylolpropane
    1.
    发明授权
    Process for the preparation of trimethylolpropane 失效
    三羟甲基丙烷的制备方法

    公开(公告)号:US4514578A

    公开(公告)日:1985-04-30

    申请号:US623279

    申请日:1984-06-22

    CPC分类号: C07C29/36 C07C29/38 C07C31/22

    摘要: Trimethylolpropane is prepared in such a manner that butyraldehyde is metered into a mixture of water, alkaline condensing agent and formaldehyde, which contains less than 0.1 mol of methanol relative to 1 mol of formaldehyde, at temperatures from 15.degree. to 50.degree. C., and after addition of the butyraldehyde the reaction mixture is heated up to 90.degree. C., sufficient water being present in the reaction mixture so that the reaction mixture has a content of trimethylolpropane of 5 to 25% by weight after the reaction.

    摘要翻译: 三羟甲基丙烷的制备方法是将丁醛计量加入到水,碱性缩合剂和甲醛的混合物中,该混合物在15℃至50℃的温度下相对于1摩尔甲醛含有小于0.1摩尔的甲醇,以及 加入丁醛后,将反应混合物加热至90℃,反应混合物中存在足够的水,使得反应混合物的反应后的三羟甲基丙烷的含量为5至25重量%。

    Process for the preparation of 2,2-dimethylolalkanals
    2.
    发明授权
    Process for the preparation of 2,2-dimethylolalkanals 失效
    制备2,2-二羟甲基烷醇的方法

    公开(公告)号:US4247485A

    公开(公告)日:1981-01-27

    申请号:US22009

    申请日:1979-03-19

    CPC分类号: C07C45/75

    摘要: A process for the preparation of 2,2-dimethylolalkanals is disclosed wherein formaldehyde is reacted with an aldehyde of the formulaRCH.sub.2 CHO (I)whereinR denotes a straight-chain or branched alkyl radical with up to 12 carbon atoms where the radical can be substituted by an alkyl or alkoxy group with 1 to 3 carbon atoms in each case wherein the molar ratio of aldehyde of formula I to formaldehyde is 1:8 to 20, the reaction being carried out at a temperature in the range of 5.degree. to 100.degree. C. in the presence of 0.01 to 0.5 mol (per mol of aldehyde of formula (I)) of a catalyst consisting essentially of a hydroxide or carbonate of an alkali metal or alkaline earth metal or an unbranched tertiary aliphatic amine.

    摘要翻译: 公开了制备2,2-二羟甲基链烷醇的方法,其中甲醛与式RCH 2 CHO(I)的醛反应,其中R表示直链或支链烷基,具有至多12个碳原子,其中该基团可被取代 在其中式I的醛与甲醛的摩尔比为1:8至20的情况下,通过具有1至3个碳原子的烷基或烷氧基,反应在5至100℃的温度下进行 在0.01至0.5mol(每摩尔式(I)的醛)存在下,基本上由碱金属或碱土金属的氢氧化物或碳酸盐或未分支的叔脂族胺组成的催化剂存在。