中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

55 records (took 0.022 seconds)

    Sterically hindered 4-amino-piperidine with a low dimer content, its production and use
    41.
    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

    Applicant: Manfred Julius ,  Harald Rust ,  Alfred Krause ,  Hardo Siegel ,  Wolfgang Siegel ,  Tom Witzel

    Inventor： Manfred Julius ,  Harald Rust ,  Alfred Krause ,  Hardo Siegel ,  Wolfgang Siegel ,  Tom Witzel

    IPC: C07B63/04 ,  C07D211/58 ,  C07D211/72 ,  C07D221/20 ,  C08K5/3435

    CPC classification number: C08K5/3435 ,  C07D211/58

    Abstract: 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.

    Abstract translation: 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 preparing 1,6 hexanediol with a level of purity over 99%
    42.
    发明授权
    Process for preparing 1,6 hexanediol with a level of purity over 99% 有权
    制备纯度超过99％的1,6己二​​醇的方法

    公开(公告)号：US6008418A

    公开(公告)日：1999-12-28

    申请号：US125976

    申请日：1998-08-28

    Applicant: Karl Gerhard Baur ,  Rolf Fischer ,  Rolf Pinkos ,  Frank Stein ,  Harald Rust ,  Boris Breitscheidel

    Inventor： Karl Gerhard Baur ,  Rolf Fischer ,  Rolf Pinkos ,  Frank Stein ,  Harald Rust ,  Boris Breitscheidel

    IPC: B01J23/80 ,  B01J23/889 ,  C07B61/00 ,  C07C29/149 ,  C07C31/20

    CPC classification number: C07C29/149

    Abstract: 1,6-Hexanediol is prepared from a carboxylic acid mixture comprising adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols which is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol by water extraction of the reaction mixture, by esterification of the acids and hydrogenation whereina) the monocarboxylic and dicarboxylic acids present in the aqueous dicarboxylic acid mixture are reacted with a low molecular weight alcohol to give the corresponding carboxylic esters,b) the resulting esterification mixture is freed of excess alcohol and low boilers in a first distillation stage,c) the bottoms are fractionated in a second distillation stage to give an ester fraction essentially free of 1,4-cyclohexanediols and a fraction comprising at least the major part of the 1,4-cyclohexanediols,d) the ester fraction essentially free of 1,4-cyclohexanediols is catalytically hydrogenated ande) in a pure distillation stage, 1,6-hexanediol is isolated from the hydrogenation product in a manner known per se.

    Abstract translation: PCT No.PCT / EP97 / 00980 Sec。 371日期1998年8月28日 102（e）1998年8月28日PCT PCT 1997年2月28日PCT公布。 公开号WO97 / 31882 日期1991年9月4日6,6-己二醇由包含己二酸，6-羟基己酸和少量1,4-环己二醇的羧酸混合物制备，其作为副产物在环己烷氧化成环己酮/ 环己醇通过水提取反应混合物，通过酸的酯化和氢化，其中存在于二羧酸水溶液混合物中的单羧酸和二羧酸与低分子量醇反应得到相应的羧酸酯，b）得到的 酯化混合物在第一蒸馏阶段中不含过量的醇和低沸点，c）在第二蒸馏阶段对塔底物进行分馏，得到基本上不含1,4-环己烷二醇的酯馏分和至少包含至少大部分 1,4-环己烷二醇，d）基本上不含1,4-环己烷二醇的酯馏分是催化氢化的，e）在纯蒸馏阶段， 以本身已知的方式从加氢产物中分离出1,6-己二醇。

    Separation of 1,4-butanediol from hydrogenation mixtures
    44.
    发明授权
    Separation of 1,4-butanediol from hydrogenation mixtures 失效
    从氢化混合物中分离出1,4-丁二醇

    公开(公告)号：US5342488A

    公开(公告)日：1994-08-30

    申请号：US18496

    申请日：1993-02-17

    Applicant: Hans-Juergen Gosch ,  Harald Rust ,  Rolf Fischer ,  Claus Hechler ,  Rolf Pinkos

    Inventor： Hans-Juergen Gosch ,  Harald Rust ,  Rolf Fischer ,  Claus Hechler ,  Rolf Pinkos

    IPC: C07C29/80 ,  C07C29/82 ,  C07C31/20 ,  B01D3/00 ,  C07C27/00

    CPC classification number: C07C29/80 ,  Y10S203/20

    Abstract: A process for the separation of 1,4-butanediol from mixtures obtained by the catalytic hydrogenation of maleates, fumarates, and/or succinates, which also contain tetrahydrofuran, water, C.sub.1 -C.sub.4 alcohols, succinic diesters, hydroxybutyrates, alkylhydroxyalkyl succinates, gamma-butyrolactone and butyrates, in addition to 1,4-butanediol, comprising the following steps:a) separating, in a first column having an actual number of plates of from 20 to 70 and operated at a top pressure of from 50 to 1100 mbar and preferably from 50 to 500 mbar and a top temperature of from 40.degree. to 120.degree. C., alcohol, water and tetrahydrofuran, as overhead product,b) feeding the bottom product of the first column into a second column having an actual number of plates of from 30 to 90 and withdrawing the overhead product consisting of alcohol and butyrate and obtained at a top pressure of from 45 to 250 mbar and a top temperature of from 45.degree. to 120.degree. C., and withdrawing gamma-butyrolactone and butyrates through a side outlet, and feeding the bottom product to a phase separator,c) feeding the 1,4-butanediol-enriched bottom phase of the liquid two-phase mixture coming from the phase separator to a third column having an actual number of plates of from 30 to 90, alcohol being distilled off as overhead product at a top pressure of from 45 to 250 mbar and a top temperature of from 45.degree. to 120.degree. C., and the azeotrope comprising 1,4 -butanediol and succinic diester is withdrawn as a sidestream and recycled to the phase separator, whilst 1,4-butanediol is removed together with alkyl-hydroxyalkyl succinate, butyl hydroxybutyrate, and high-boiling fractions as bottoms, andd) separating the succinate-enriched top phase in the phase separator.

    Abstract translation: 还含有四氢呋喃，水，C 1 -C 4醇，琥珀酸二酯，羟基丁酸酯，琥珀酸烷基羟基烷基酯，γ-丁内酯和/或琥珀酸酯的马来酸盐，富马酸盐和/或琥珀酸盐的催化氢化得到的混合物的分离方法， 丁内酯和丁酸酯除了1,4-丁二醇外还包括以下步骤：a）在具有20至70的实际板数的第一塔中分离并在50至1100毫巴的最高压力下操作，以及 优选为50至500毫巴，顶部温度为40至120℃，醇，水和四氢呋喃作为塔顶产物，b）将第一塔的底部产物进料到具有实际数量的板的第二塔 30至90份，并取出由醇和丁酸盐组成的塔顶产物，并在顶部压力为45至250毫巴，顶部温度为45至120℃下获得，并将γ-丁内酯和丁酸酯 通过侧出口将底部产物供给到相分离器中，c）将来自相分离器的液体两相混合物的富含1,4-丁二醇的底相进料到具有实际数量的板的第三塔 为30至90，在顶部压力为45至250毫巴，顶部温度为45至120℃的条件下，蒸馏出作为塔顶产物的醇，由1,4-丁二醇和琥珀酸二酯组成的共沸物为 作为侧流回收并循环到相分离器中，而1,4-丁二醇与琥珀酸烷基 - 羟基烷基酯，羟基丁酸丁酯和作为塔底产物的高沸点馏分一起除去，以及d）在相中分离富含琥珀酸酯的顶相 分隔器。

    Planetary roller extruder
    45.
    发明授权
    Planetary roller extruder 有权

    公开(公告)号：US10654210B2

    公开(公告)日：2020-05-19

    申请号：US15935206

    申请日：2018-03-26

    Applicant: Harald Rust

    Inventor： Harald Rust

    IPC: B29C48/44 ,  B29C48/425 ,  B29C48/435 ,  B29C48/505 ,  B29C48/585 ,  B29C48/68 ,  B29C48/685 ,  B29C48/80 ,  B29B7/48 ,  B29C48/395 ,  B29C48/25 ,  B29C48/625

    Abstract: A planetary roller extruder includes a housing with an internal housing toothing. A central spindle is disposed in the housing and has an external central spindle toothing. A plurality of planetary spindles are disposed about the central spindle and in the housing. Each of the planetary spindles has an external planetary spindle toothing configured to mesh with the internal housing toothing and the external central spindle toothing. A drive is configured to rotate the central spindle. The drive includes a drive journal connected to the central spindle to permit transmission of a driving force from the drive to the central spindle. The drive journal includes a bore. The bore has internal projections configured to engage with the external central spindle toothing to secure the central spindle to the drive journal by a screw-type connection.

Patent Agency Ranking