Process for the separation of 2-alkene-1,4-diols and 3-alkene-1,2-diols
from catalysts
    7.
    发明授权
    Process for the separation of 2-alkene-1,4-diols and 3-alkene-1,2-diols from catalysts 失效
    从催化剂中分离2-烯-1,4-二醇和3-烯-1,2-二醇的方法

    公开(公告)号:US5856591A

    公开(公告)日:1999-01-05

    申请号:US889302

    申请日:1997-07-08

    CPC分类号: C07C29/86 C07C29/88

    摘要: This invention pertains, firstly, to the use of mixtures of hydriodic acid and organic solvent soluble iodide salts as catalysts for the hydration of .gamma.,.delta.-epoxyalkenes to form a mixture of the corresponding 2-alkene-1,4-diol and 3-alkene-1,2-diol isomers. Secondly, this invention describes the use of pH to control the 2-alkene-1,4-diol/3-alkene-1,2-diol product ratio, and achieve improved 2-alkene-1,4-diol selectivities by controlling the pH to near neutral values. Thirdly, this invention includes a catalyst recovery process whereby a liquid/liquid extraction is used to separate the product from the catalyst. In this extraction, .gamma.,.delta.-epoxyalkene, or a .gamma.,.delta.-epoxyalkene-containing organic solvent, is used to extract the catalysts from water, leaving the diol products in the aqueous phase, from which they may be subsequently recovered by distillation, extraction or by other means.

    摘要翻译: 本发明首先涉及使用氢碘酸和有机溶剂可溶性碘盐的混合物作为γ,δ-环氧乙烷水合的催化剂,以形成相应的2-烯-1,4-二醇和3- 烯-1,2-二醇异构体。 其次,本发明描述了使用pH控制2-烯-1,4-二醇/ 3-烯-1,2-二醇的产物比例,并通过控制二烯烃-1,4-二醇选择性来实现改进的2-烯-1,4-二醇选择性 pH值接近中性值。 第三,本发明包括催化剂回收方法,其中液/液萃取用于将产物与催化剂分离。 在该提取中,使用γ,δ-环氧亚烷基或含有γ-环氧亚烷基烯烃的有机溶剂,从水中提取催化剂,将二醇产物置于水相中,随后可通过蒸馏回收它们, 提取或通过其他方式。

    Polyether glycols and alcohols derived from 3,4-epoxy-1-butene,
tetrahydrofuran and an initiator
    8.
    发明授权
    Polyether glycols and alcohols derived from 3,4-epoxy-1-butene, tetrahydrofuran and an initiator 失效
    衍生自3,4-环氧-1-丁烯,四氢呋喃和引发剂的聚醚二醇和醇

    公开(公告)号:US5502137A

    公开(公告)日:1996-03-26

    申请号:US344905

    申请日:1994-11-25

    摘要: Disclosed are novel polyether compounds obtained by the reaction or polymerization of 3,4-epoxy-1-butene in the presence of tetrahydrofuran, an acidic catalyst and a nucleophilic initiator compound. The polyether compounds comprise m units of residue (1), n units of residue (2), and p units of residue (3) wherein (i) residues (1), (2) and (3) have the structures: ##STR1## (ii) the total value of m+n+p is 5 to 70; (iii) the value of n/(m+n+p) is in the range of 0.2 to 0.4, i.e., residue (2) constitutes from 20 to 40 mole percent of the total moles of residues (1), (2) and (3); and (iv) at least 98 percent of the terminal groups have the structure: ##STR2##

    摘要翻译: 公开了在四氢呋喃,酸性催化剂和亲核引发剂化合物的存在下通过3,4-环氧-1-丁烯的反应或聚合获得的新型聚醚化合物。 聚醚化合物包括m个残基(1),n个残基(2)单元和p个残基(3)单元,其中(i)残基(1),(2)和(3)具有以下结构: