Process for the separation of 2-alkene-1,4-diols and 3-alkene-1,2-diols
from catalysts
    1.
    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。

    Novel monoterpenes
    2.
    发明授权
    Novel monoterpenes 失效
    新单萜

    公开(公告)号:US5068453A

    公开(公告)日:1991-11-26

    申请号:US491459

    申请日:1990-03-09

    摘要: Monoterpenes of the formulae: ##STR1## wherein X, Y and Y' are independently --CHO, --CO.sub.2 H or --CH.sub.2 OR, R being hydrogen or tetrahydropyranyl, and Y may be in E- or Z-form about the adjacent double bondhave been isolated from agriculturally harmful acarids and then identified. They have fragrance of citrus-note and are bactericidally active against bacteria which may cause crop injury. Some of them are the first sex pheromones to be isolated from the acarids.

    摘要翻译: 下式的单萜:其中X,Y和Y'独立地是-CHO,-CO 2 H或-CH 2 OR,R是氢或四氢吡喃基,Y可以是E-或 关于相邻双键的Z型已经从农业有害的螨中分离出来,然后鉴定出来。 它们具有柑橘香味,对细菌有杀菌活性,可能导致作物受伤。 其中有些是从螨类中分离的第一种性信息素。

    Preparation of monoalkylene glycols in two stages
    4.
    发明授权
    Preparation of monoalkylene glycols in two stages 失效
    单亚烷基二醇的制备分两个阶段

    公开(公告)号:US4564715A

    公开(公告)日:1986-01-14

    申请号:US663828

    申请日:1984-10-23

    CPC分类号: C07C29/106

    摘要: High selectivity to monoalkylene glycol is obtained by contacting in an associated moiety-forming zone alkylene oxide and a selectivity enhancing, dissociatable metalate anion under conditions sufficient to associate at least a portion of the alkylene oxide with metalate anion, and then contacting the associated moiety with water in a glycol-forming zone to form alkylene glycol. The alkylene glycol can be separated from metalate anion. Desirably, the metalate anion can be recycled to the associated moiety-forming zone.

    摘要翻译: 单亚烷基二醇的高选择性是通过在足以使至少一部分环氧烷与金属盐阴离子缔合的条件下,在相关的部分形成区烯化氧和选择性增强的可离解的金属化合物阴离子中接触获得的,然后使相关部分与 在形成乙二醇的区域中形成亚烷基二醇。 亚烷基二醇可以与金属盐阴离子分离。 理想地,金属盐阴离子可以再循环到相关的部分形成区。

    Process for the production of alkene-1,5-diols
    6.
    发明授权
    Process for the production of alkene-1,5-diols 失效
    制备烯-1,5-二醇的方法

    公开(公告)号:US4254289A

    公开(公告)日:1981-03-03

    申请号:US758727

    申请日:1977-01-12

    IPC分类号: C07C29/38 C07C33/035

    CPC分类号: C07C29/38

    摘要: In the reaction of 3-methyl-3-buten-1-ol with aqueous formaldehyde forming isomeric alkene-1,5-diols, particularly 3-methylene-1,5-pentanediol and 3-methyl-2-pentene-1,5-diol, it has been found that yields of the diols surprisingly are substantially increased if the reaction is effected in the presence of added isobutene and the mol ratio of 3-methyl-3-buten-1-ol to formaldehyde is at least 1:1.

    摘要翻译: 在3-甲基-3-丁烯-1-醇与形成异构烯烃-1,5-二醇的甲醛水溶液的反应中,特别是3-亚甲基-1,5-戊二醇和3-甲基-2-戊烯-1,5- 已经发现,如果在添加的异丁烯的存在下进行反应,并且3-甲基-3-丁烯-1-醇与甲醛的摩尔比至少为1:1,则二醇的产率令人惊奇地显着增加。 1。

    Hydrogenation of butadienepolyperoxide to unsaturated diols
    7.
    发明授权
    Hydrogenation of butadienepolyperoxide to unsaturated diols 失效
    丁二烯过氧化物对不饱和二醇的氢化

    公开(公告)号:US4209651A

    公开(公告)日:1980-06-24

    申请号:US13236

    申请日:1979-02-21

    CPC分类号: C07C29/132

    摘要: A process for the hydrogenation of butadienepolyperoxide in a suitable solvent, e.g., tetrahydrofuran, at temperatures of 75.degree.-110.degree. C. and pressure above 2000 psia by contacting the butadienepolyperoxide and hydrogen in the presence of metallic silver. The process produces 1-butene-3,4-diol and 2-butene-1,4-diol.

    摘要翻译: 在合适的溶剂如四氢呋喃中,在75-110℃的温度和高于2000psia的压力下氢化丁二烯过氧化物的方法,通过在金属银的存在下使对二异戊二烯和氢接触。 该方法生产1-丁烯-3,4-二醇和2-丁烯-1,4-二醇。