Preparation of N-(2-hydroxyethyl)-piperazine
    114.
    发明授权
    Preparation of N-(2-hydroxyethyl)-piperazine 失效
    制备N-(2-羟乙基) - 哌嗪

    公开(公告)号:US5455352A

    公开(公告)日:1995-10-03

    申请号:US282073

    申请日:1994-07-28

    CPC分类号: C07D295/088 Y02P20/582

    摘要: Preparation of N-(2-hydroxyethyl)-piperazine by reacting triethanolamine with ammonia in the presence of hydrogen at from 100.degree. to 500.degree. C. and from 10 to 500 bar over a heterogeneous catalyst in which the catalytically active material contains from 20 to 85% by weight of ZrO.sub.2 or Al.sub.2 O.sub.3 or mixtures thereof, from 1 to 30% by weight of at least one copper oxide, calculated as CuO, and from 1 to 60% by weight of at least one oxide of cobalt, nickel or molybdenum, calculated as CoO, NiO and MoO.sub.3, respectively.

    摘要翻译: 通过使三乙醇胺与氨在100〜500℃的氢气和10〜500巴的存在下,在非均相催化剂上制备N-(2-羟乙基) - 哌嗪,其中催化活性物质含有20〜 85重量%的ZrO 2或Al 2 O 3或其混合物,1至30重量%的以CuO计算的至少一种氧化铜和1至60重量%的至少一种钴,镍或钼的氧化物, 分别计算为CoO,NiO和MoO3。

    Preparation of 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetra-hydronaphthalene
    118.
    发明授权
    Preparation of 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetra-hydronaphthalene 失效
    制备1,1,3,4,4,6-六甲基-1,2,3,4-四氢化萘

    公开(公告)号:US5068479A

    公开(公告)日:1991-11-26

    申请号:US668484

    申请日:1991-03-13

    CPC分类号: C07C2/72 C07C2102/10

    摘要: A process for preparing 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene of the formula I ##STR1## comprises reacting p-cymene of the formula II ##STR2## with a hexene of the formula IIIa, IIIb and/or IIIc ##STR3## in the presence of a catalytic amount of aluminum halide and a catalytic amount of a triphenylmethyl compound of the formula IV ##STR4## wherein R.sup.1, R.sup.2 and R.sup.3 are each, independently of one another, hydrogen, C.sub.1 -C.sub.4 -alkyl, nitro or halogen and X is hydrogen or halogen.

    摘要翻译: 制备式I(I)的1,1,3,4,4,6-六甲基-1,2,3,4-四氢化萘的方法包括使式II的对甲基异丙苯(IMAGE)( II)与式IIIa,IIIb和/或IIIc(IIIa)(IIIb)(IIIc)的己烯在催化量的卤化铝和催化量的三苯基甲基 式IV的化合物其中R 1,R 2和R 3各自独立地为氢,C 1 -C 4 - 烷基,硝基或卤素,X为氢或卤素。

    Preparation of dihydroxydiones
    119.
    发明授权
    Preparation of dihydroxydiones 失效
    二羟基二糖的制备

    公开(公告)号:US5009753A

    公开(公告)日:1991-04-23

    申请号:US423224

    申请日:1989-10-18

    IPC分类号: C07C49/17 C25B3/10

    CPC分类号: C07C49/17 C25B3/10

    摘要: Dihydroxydiones of the general formulaR--CO--CH(OH)--CH(OH)--CO--R Iwhere R is alkyl, are prepared by a process in which an aldehyde of the general formula ##STR1## where R has the abovementioned meaning, is subjected to electrolysis in a water-containing electrolyte which has a pH of less than 7.

    摘要翻译: 其中R为烷基的通式为R-CO-CH(OH)-CH(OH)-CO-R I的二羟基二糖是通过其中R具有上述通式的醛的方法制备的 意思是在pH小于7的含水电解液中进行电解。