Process for purifying sterically hindered 4-amino piperidines
    1.
    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。

    Sterically hindered 4-amino-piperidine with a low dimer content, its
production and use
    2.
    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。

    METHOD FOR PRODUCING LINEAR PENTENENITRILE
    7.
    发明申请
    METHOD FOR PRODUCING LINEAR PENTENENITRILE 有权
    生产线性胆固醇的方法

    公开(公告)号:US20120178958A1

    公开(公告)日:2012-07-12

    申请号:US13361783

    申请日:2012-01-30

    IPC分类号: C07C253/30

    摘要: A method for producing 3-pentenenitrile is provided that includes: (a) isomerizing an educt stream containing 2-methyl-3-butenenitrile on at least one dissolved or dispersed isomerisation catalyst to form a stream (1), which contains the isomerisation catalyst(s), 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile; (b) distilling the stream (1) to obtain a stream (2) as the overhead product, which contains 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile and a stream (3) as the bottom product, which contains the isomerisation catalyst(s); (c) distilling the stream (2) to obtain a stream (4) as the overhead product, which is enriched with (Z)-2-methyl-2-butenenitrile in comparison to stream (2), and a stream (5) as the bottom product, which is enriched with 3-pentenenitrile and 2-methyl-3-butenenitrile in comparison to stream (2); (d) distilling stream (5) to obtain a stream (6) as the bottom product, which contains 3-pentenenitrile and a stream (7) as the head product containing 2-methyl-3-butenenitrile.

    摘要翻译: 提供了一种制备3-戊烯腈的方法,其包括:(a)在至少一种溶解或分散的异构化催化剂上异构化含有2-甲基-3-丁烯腈的流出物流以形成含有异构化催化剂( s),2-甲基-3-丁烯腈,3-戊烯腈和(Z)-2-甲基-2-丁烯腈; (b)蒸馏物流(1)以获得作为塔顶产物的物流(2),其含有2-甲基-3-丁烯腈,3-戊烯腈和(Z)-2-甲基-2-丁烯腈和流( 3)作为含有异构化催化剂的底部产物; (c)与料流(2)相比,蒸馏物流(2)以获得作为塔顶产物的物流(4),其与(2)相比富含(Z)-2-甲基-2-丁烯腈, 作为与料流(2)相比富含3-戊烯腈和2-甲基-3-丁烯腈的底部产物; (d)蒸馏物流(5),得到作为底物的物流(6),其含有3-戊烯腈和作为含有2-甲基-3-丁烯腈的头部产物的物流(7)。

    Obtaining an aliphatic dialdehyde Monoacetal
    10.
    发明授权
    Obtaining an aliphatic dialdehyde Monoacetal 失效
    获得脂族二醛单缩醛

    公开(公告)号:US07498451B2

    公开(公告)日:2009-03-03

    申请号:US10536900

    申请日:2003-11-27

    IPC分类号: C07D317/26 C07C45/64

    摘要: The invention relates to a process for obtaining a pure aliphatic dialdehyde monoacetal by reaction of the corresponding aliphatic dialdehyde or a precursor of the corresponding aliphatic dialdehyde with one or more aliphatic mono- or polyhydric alcohols while distillatively removing water to obtain a reaction mixture which is separated distillatively, which comprises carrying out the distillative separation continuously in a dividing wall column to obtain pure aliphatic dialdehyde monoacetal as a sidestream from the dividing wall column, or in two distillation columns to obtain crude aliphatic dialdehyde monoacetal as a sidestream in the first distillation column, feed the crude aliphatic dialdehyde monoacetal to the second distillation column and obtain pure aliphatic dialdehyde monoacetal as the sidestream from the second distillation column.

    摘要翻译: 本发明涉及通过相应的脂族二醛或相应的脂族二醛的前体与一种或多种脂肪族一元醇或多元醇反应而获得纯的脂族二醛单缩醛的方法,同时蒸馏除去水,得到分离的反应混合物 蒸馏,其包括在分隔壁塔中连续进行蒸馏分离以获得作为来自分隔壁塔的侧流的纯脂族二醛单缩醛,或在两个蒸馏塔中,以在第一蒸馏塔中获得作为侧流的粗脂族二醛单缩醛, 将粗脂族二醛单缩醛进料至第二蒸馏塔,得到作为来自第二蒸馏塔的侧流的纯脂族二醛单缩醛。