Process for the preparation of 2-ethyl-1,3-hexane diol
    1.
    发明授权
    Process for the preparation of 2-ethyl-1,3-hexane diol 失效
    2-乙基-1,3-己二醇的制备方法

    公开(公告)号:US5663452A

    公开(公告)日:1997-09-02

    申请号:US596177

    申请日:1996-05-03

    摘要: The invention relates to a new, technically simple but efficient process, with a good yield, for the preparation of 2-ethyl-1,3-hexane diol from n-butyraldehyde by aldol condensation in the presence of an alkali metal hydroxide or alkali earth metal hydroxide catalyst. To promote the reaction and to improve its controllability, a neutral phase-transfer catalyst is additionally used in the process according to the invention. 2-Ethyl-1,3-hexane diol is used in insecticides and, for example, in the preparation of polyesters.

    摘要翻译: PCT No.PCT / FI94 / 00387 Sec。 371日期:1996年5月3日 102(e)日期1996年5月3日PCT提交1994年9月2日PCT公布。 出版物WO95 / 07254 日期1995年3月16日本发明涉及一种新的技术上简单但有效的方法,具有良好的收率,用于在碱存在下通过醛醇缩合从正丁醛中制备2-乙基-1,3-己二醇 金属氢氧化物或碱土金属氢氧化物催化剂。 为了促进反应并提高其可控性,在本发明的方法中另外使用中性相转移催化剂。 2-乙基-1,3-己二醇用于杀虫剂,例如用于制备聚酯。

    Process for the production of 2-butyl-2-ethyl-1,3-propanediol
    2.
    发明授权
    Process for the production of 2-butyl-2-ethyl-1,3-propanediol 失效
    2-丁基-2-乙基-1,3-丙二醇的制备方法

    公开(公告)号:US06369281B1

    公开(公告)日:2002-04-09

    申请号:US09242656

    申请日:2000-05-30

    IPC分类号: C07C3118

    CPC分类号: C07C29/38 C07C31/20

    摘要: The present invention concerns a process for producing 2-butyl-2-ethyl-1,3-propanediol. According to the process, a reaction mixture is formed, containing 2-ethylhexanal and formaldehyde, into which an hydroxide compound is fed, whereby 2-ethylhexanal and formaldehyde are reacted to to produce 2-butyl-2-ethyl-1,3-propanediol. According to the invention, the hydroxide compound is incrementally fed into the reaction mixture. Preferably the hydroxide compound is fed at least at two input rates, in such a way that the heat production of the reaction between 2-ethylhexanal and formaldehyde immediately after each increase of the input rate of the hydroxide compound, is at least almost the same. The invention allows for the production of BEPD in a controlled and safe manner, with excellent yields.

    摘要翻译: 本发明涉及一种生产2-丁基-2-乙基-1,3-丙二醇的方法。 根据该方法,形成含有2-乙基己醛和甲醛的反应混合物,向其中加入氢氧化物,由此使2-乙基己醛和甲醛反应,生成2-丁基-2-乙基-1,3-丙二醇 。 根据本发明,向反应混合物中逐渐加入氢氧化物。 优选地,氢氧化物化合物至少以两个输入速率进料,使得在每次增加氢氧化物化合物的输入速率之后,2-乙基己醛和甲醛之间的反应的热产生至少几乎相同。 本发明允许以控制和安全的方式生产BEPD,具有优异的产率。