Sterically hindered 4-amino-piperidine with a low dimer content, its
production and use
    1.
    发明授权
    Sterically hindered 4-amino-piperidine with a low dimer content, its production and use 失效
    四聚体含量低的4-氨基哌啶,其生产和使用

    公开(公告)号:US6013803A

    公开(公告)日:2000-01-11

    申请号:US180580

    申请日:1998-11-12

    CPC分类号: C08K5/3435 C07D211/58

    摘要: The invention relates to a process for reducing the dimerization of piperidines of the formula I ##STR1## where R.sup.1 to R.sup.4 are C.sub.1 - to C.sub.6 -alkyl, R.sup.1 and R.sup.2 and/or R.sup.3 and R.sup.4 together are a CH.sub.2 chain having 2 to 5 carbon atoms, which comprises adding to the piperidine from 0.001 to 0.2% by weight of a reducing agent of the formula MXH.sub.4-m Y.sub.m, where M is an alkali metal, NR.sub.4, where R are identical or different C.sub.1 -C.sub.4 -alkyl groups, or an equivalent of an alkaline earth metal or an equivalent of zinc, X is boron or aluminum, Y is H or CN and m is 0 or 1. The invention also relates to a mixture of piperidines of the formula I, from 0.001 to 0.2% by weight of a reducing agent and from 1 to 1000 ppm of dimers of the piperidines of the formula I, and to the preparation of hindered amine light stabilizers therefrom.

    摘要翻译: PCT No.PCT / EP97 / 02763 Sec。 371日期:1998年11月12日 102(e)1998年11月12日日期PCT提交1997年5月28日PCT公布。 出版物WO97 / 46528 日期1997年12月11日本发明涉及一种降低式Ⅰ哌啶的二聚的方法,其中R 1至R 4为C 1至C 6烷基,R 1和R 2和/或R 3和R 4一起为具有2至 5个碳原子,其包括向所述哌啶中添加0.001至0.2重量%的式MXH4-mYm的还原剂,其中M是碱金属,NR4,其中R是相同或不同的C 1 -C 4 - 烷基, 或当量的碱土金属或当量的锌,X为硼或铝,Y为H或CN,m为0或1.本发明还涉及式I的哌啶的混合物,为0.001至0.2 重量%的还原剂和1至1000ppm式I的哌啶的二聚体,以及由其制备受阻胺光稳定剂。

    Process for purifying sterically hindered 4-amino piperidines
    2.
    发明授权
    Process for purifying sterically hindered 4-amino piperidines 失效
    空间位阻4-氨基哌啶纯化方法

    公开(公告)号:US6011157A

    公开(公告)日:2000-01-04

    申请号:US180626

    申请日:1998-11-12

    CPC分类号: C07D211/56

    摘要: A process for purifying crude piperidines of the formula I ##STR1## where R.sup.1 to R.sup.4 are C.sub.1 -C.sub.6 -alkyl, or R.sup.1 and R.sup.2 and/or R.sup.3 and R.sup.4 together are a CH.sub.2 -chain of 2 to 5 carbons, which comprises, in a first step, removing high-boiling substances and, if present, water from the crude piperidines by distillation; in a second step, adding from 0.01 to 5% by weight, based on the product of the first step, as a reducing agent; and, in a third step, isolating the piperidines by distillation.

    摘要翻译: PCT No.PCT / EP97 / 02822 Sec。 371日期:1998年11月12日 102(e)1998年11月12日日期PCT提交1997年5月30日PCT公布。 出版物WO97 / 46529 日期1997年12月11日一种用于纯化式I的粗哌啶的方法,其中R 1至R 4为C 1 -C 6烷基,或R 1和R 2和/或R 3和R 4一起为2至5个碳的CH 2链,其包含 在第一步中,通过蒸馏除去高沸点物质,如果存在,则从粗哌啶衍生出水; 在第二步中,以作为还原剂的第一步产物为基准添加0.01〜5重量% 并且在第三步骤中,通过蒸馏分离哌啶。

    Preparation of hydroxybenzaldehydes
    3.
    发明授权
    Preparation of hydroxybenzaldehydes 失效
    羟基苯甲醛的制备

    公开(公告)号:US4967013A

    公开(公告)日:1990-10-30

    申请号:US346714

    申请日:1989-05-03

    摘要: Hydroxybenzaldehydes of the formula (I) are prepared from a benzaldehyde of the formula (II) or its acetal, in which R.sup.1 in the R.sup.1 O-phenyl ether group is an alkyl, cycloalkyl, alkylcycloalkyl or alkylaryl radical, R.sup.2 is H or OH or is identical to R.sup.1 and one or more R.sup.1 O-phenyl ether groups are ortho, meta or para to the aldehyde function, by a process in which a benzaldehyde of the formula (II) or its acetal, in which R.sup.1 and R.sup.2 have the abovementioned meanings and one or more R.sup.1 O-phenyl ether groups occupy the abovementioned position with respect to the aldehyde function, is converted into a hydroxybenzaldehyde of the formula (I) in the presence of water over a zeolite as a heterogeneous catalyst. ##STR1## The catalysts used are, in particular, zeolites of the pentasil type.

    摘要翻译: 式(I)的羟基苯甲醛由式(II)的苯甲醛或其缩醛制备,其中R1O-苯基醚基团中的R1是烷基,环烷基,烷基环烷基或烷基芳基,R2是H或OH,或是 通过其中R 1和R 2具有上述含义的式(II)的苯甲醛或其缩醛的方法,R 1和R 10一个或多个R 1 O-苯基醚基团是醛官能的邻位,间位或对位, 一个或多个R1O-苯基醚基团相对于醛官能团占据上述位置,在作为多相催化剂的沸石上在水存在下转化成式(I)的羟基苯甲醛。 所用的催化剂尤其是pentasil型沸石。

    Preparation of 1,4-alkylenediamines
    6.
    发明授权
    Preparation of 1,4-alkylenediamines 失效
    1,4-亚烷基二胺的制备

    公开(公告)号:US5254738A

    公开(公告)日:1993-10-19

    申请号:US657632

    申请日:1991-02-19

    CPC分类号: C07C209/48

    摘要: A process for the preparation of a 1,4-alkylenediamine of the general formula I ##STR1## in which the substituents R.sup.1 and R.sup.2 are independently hydrogen, C.sub.1 -C.sub.10 -alkyl, phenyl or benzyl, by reacting a succinic dinitrile of the general formula II ##STR2## in which R.sup.1 and R.sup.2 have the meanings stated, with hydrogen at a temperature of from 30.degree. to 250.degree. C. and a pressure of from 50 to 350 bar in contact with a hydrogenation catalyst, wherein the hydrogenation catalyst used contains cobalt oxide and one or more oxides of the elements iron, nickel, manganese, chromium, molybdenum, tungsten, and phosphorus and one or more oxides of elements in the alkali metal group, alkaline earth metal group, and rare earth group of the Periodic Table, and of scandium, and/or of yttrium.

    摘要翻译: 制备通式I(I)的1,4-亚烷基二胺的方法,其中取代基R 1和R 2独立地为氢,C 1 -C 10 - 烷基,苯基或苄基,通过使琥珀酸二腈与 其中R1和R2具有所述含义的通式II(II),氢气在30℃至250℃的温度和50至350巴的压力下与氢化催化剂接触, 其中使用的氢化催化剂包含氧化钴和一种或多种元素铁,镍,锰,铬,钼,钨和磷的氧化物和一种或多种碱金属组元素,碱土金属组和稀有元素中的元素氧化物 周期表地球组,钪和/或钇。