Process for the preparation of trimethylolalkanes
    21.
    发明授权
    Process for the preparation of trimethylolalkanes 失效
    三羟甲基烷烃的制备方法

    公开(公告)号:US4122290A

    公开(公告)日:1978-10-24

    申请号:US861472

    申请日:1977-12-16

    摘要: An improved process for the preparation of a trimethylolalkane of the formula ##STR1## wherein R.sup.1 denotes an aliphatic radical by reacting formaldehyde with an aldehyde of the formula ##STR2## wherein R.sup.1 has the meaning indicated above and thereafter hydrogenating the resultant 2,2-dimethylolalkanal, the improvement residing in employing formaldehyde in a molar ratio of at least 8:1 to the aldehyde reactant, carrying out the aldehyde-formaldehyde reaction in the presence of an aldol condensation base at a temperature between -20 and 5.degree. C, optionally in the presence of an ion of an element of group VII and/or VIII and/or sub-group I or II of the periodic system.

    摘要翻译: 制备式(I)的三羟甲基烷烃的改进方法,其中R1表示通过甲醛与式(II)的醛反应的脂族基团,其中R1具有上述含义,然后将 得到的2,2-二羟甲基烷醛,其改进在于使用与醛反应物摩尔比至少为8:1的甲醛,在醛醇缩合碱存在下,在-20℃和-20℃之间的温度下进行醛 - 甲醛反应 5℃,任选地在周期系中的VII族元素和/或VIII族元素和/或I族或II族元素的离子存在下进行。

    Process for removing boric acid from lactams
    22.
    发明授权
    Process for removing boric acid from lactams 失效
    从内酰胺中除去硼酸的方法

    公开(公告)号:US3948888A

    公开(公告)日:1976-04-06

    申请号:US431285

    申请日:1974-01-07

    CPC分类号: C07D201/16 C07H19/056

    摘要: The invention relates to a process for removing boric acid from a lactam which still contains boric acid and has been produced by catalytic rearrangement of oximes wherein an alkali and/or alkaline earth oxide and/or hydroxide is added to said lactam, the resulting mixture is filtered and the lactam is recovered from the filtrate. Not withstanding the high solubility of inorganic salts in lactams the boric acid can substantially be removed.

    摘要翻译: 本发明涉及一种从还含有硼酸的内酰胺中除去硼酸的方法,并且通过催化重排肟制备其中向所述内酰胺中加入碱金属和/或碱土金属氧化物和/或氢氧化物的方法,所得混合物为 过滤并从滤液中回收内酰胺。 无机盐在内酰胺中的溶解度高,硼酸基本上可以被除去。

    Process for the preparation of hydrooxydiphenyls
    26.
    发明授权
    Process for the preparation of hydrooxydiphenyls 失效
    制备氢化二苯乙烯的方法

    公开(公告)号:US5248840A

    公开(公告)日:1993-09-28

    申请号:US950619

    申请日:1992-09-24

    CPC分类号: C07C37/07

    摘要: To prepare hydroxydiphenyls, a compound or a mixture of several compounds consisting of completely or partly hydrogenated hydroxydiphenyl is dehydrogenated catalytically in the gas phase, a catalyst being employed which comprises, as the active constituents, a combination of rhodium and one or more other platinum metal(s) from the group comprising platinum, palladium, ruthenium and iridium, and which comprises, as promoters, one or more alkali metal hydroxides and/or alkali metal sulphates, the support of which comprises chromium and manganese.

    摘要翻译: 为了制备羟基二苯,将由完全或部分氢化的羟基二苯组成的化合物或几种化合物的混合物在气相中催化脱氢,使用的催化剂包括作为活性组分的铑和一种或多种其它铂金属的组合 其包含铂,钯,钌和铱的基团,并且其包含作为助催化剂的一种或多种碱金属氢氧化物和/或碱金属硫酸盐,其载体包含铬和锰。