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32 条记录 (耗时 0.014 秒)

    Process for the purification of acrolein
    1.
    发明授权
    Process for the purification of acrolein 有权

    公开(公告)号：US10556850B1

    公开(公告)日：2020-02-11

    申请号：US16520384

    申请日：2019-07-24

    申请人： Evonik Degussa GmbH

    发明人： Thorsten Merker ,  Martin Koerfer ,  Michael Eicker ,  Bruno Krudewig ,  Rainer Malzkorn ,  Haohao Zhu

    IPC分类号： C07C45/82 ,  C07C319/00 ,  C07C319/06 ,  C07C321/08 ,  C07C47/22

    摘要： The present invention relates to a process for purifying acrolein. The process includes the steps of a) splitting a liquid feed stream containing acrolein into at least a first liquid stream and a second liquid stream, b) introducing the first liquid stream with a temperature T1 into a distillation column at a point between the top and the bottom of the distillation column, c) introducing the second liquid stream with a temperature T2 into the distillation column at the top of the distillation column, d) withdrawing an overhead vapor stream enriched in acrolein from the distillation column, and e) withdrawing a bottom stream depleted in acrolein. The temperature T2 of the second liquid stream in step c) is lower than the temperature T1 of the first liquid stream in step b).

    3-amino-2-mercaptobenzoic acid derivatives and processes for their preparation
    3.
    发明授权
    3-amino-2-mercaptobenzoic acid derivatives and processes for their preparation 有权
    3-氨基-2-巯基苯甲酸衍生物及其制备方法

    公开(公告)号：US06002013A

    公开(公告)日：1999-12-14

    申请号：US148276

    申请日：1998-09-04

    申请人： Walter Kunz ,  Beat Jau

    发明人： Walter Kunz ,  Beat Jau

    IPC分类号： C07C319/02 ,  C07C319/12 ,  C07C323/63 ,  C07C327/26 ,  C07C335/22 ,  C07D277/82 ,  C07D285/14 ,  C07D277/62 ,  C07C255/07 ,  C07C321/08

    CPC分类号： C07D285/14 ,  C07C319/02 ,  C07C319/12 ,  C07C323/63 ,  C07C327/26 ,  C07C335/22 ,  C07D277/82

    摘要： Compounds of the formula I ##STR1## and disulfides thereof and salts thereof are important intermediate products for the preparation of compounds having a microbicidal and plant-immunizing action, of the formula III ##STR2## In the compounds of the formulae I and III: X is halogen,n is 0, 1, 2 or 3;Z is CN, CO--A or CS--A,A is hydrogen, halogen, OR.sub.1, SR.sub.2 and N(R.sub.3)R.sub.4 ;R.sub.1 to R.sub.4 are hydrogen, a substituted or unsubstituted, open-chain, saturated or unsaturated hydrocarbon radical containing not more than 8 carbon atoms, a substituted or unsubstituted cyclic, saturated or unsaturated hydrocarbon radical containing not more than 10 carbon atoms, substituted or unsubstituted benzyl or phenethyl, a substituted or unsubstituted alkanoyl group containing not more than 8 carbon atoms, a substituted or unsubstituted benzoyl group or a substituted or unsubstituted heterocyclyl radical; or R.sub.3 and R.sub.4, together with the nitrogen atom to which they are bonded, are a 5- or 6-membered, substituted or unsubstituted heterocyclic radical having 1-3 heteroatoms O, S and/or NProcesses for the preparation of compounds of the formula I are described.

    摘要翻译： 式I化合物及其二硫化物及其盐是制备具有式III的杀微生物和植物免疫作用的化合物的重要中间产物。在式I和III化合物中：X为卤素，n为0 ，1,2或3; Z是CN，CO-A或CS-A，A是氢，卤素，OR1，SR2和N（R3）R4; R 1至R 4为氢，取代或未取代的含有不超过8个碳原子的开链，饱和或不饱和烃基，取代或未取代的含有不多于10个碳原子的环状，饱和或不饱和烃基，取代或未取代的 苄基或苯乙基，取代或未取代的不超过8个碳原子的烷酰基，取代或未取代的苯甲酰基或取代或未取代的杂环基; 或R 3和R 4与它们所键合的氮原子一起是具有1-3个杂原子O，S和/或N的5或6元取代或未取代的杂环基。 描述了公式I。

    Method for production of sulfhydryl compounds using ultra-violet radiation
    8.
    发明授权
    Method for production of sulfhydryl compounds using ultra-violet radiation 失效
    使用紫外辐射生产巯基化合物的方法

    公开(公告)号：US3992289A

    公开(公告)日：1976-11-16

    申请号：US535631

    申请日：1974-12-23

    申请人： Bobby F. Dannels ,  Emil J. Geering

    发明人： Bobby F. Dannels ,  Emil J. Geering

    IPC分类号： C07C319/04 ,  C07C67/00 ,  C07C313/00 ,  C07C319/14 ,  C07C321/04 ,  C07C321/08 ,  C08G75/02 ,  C08G75/14 ,  B01J1/10

    CPC分类号： C07C319/04 ,  C08G75/02 ,  C08G75/14

    摘要： An improved process is disclosed for production of sulfhydryl-terminated compounds by reaction of an allene and hydrogen sulfide initiated with ultraviolet light of wavelength above about 2600 Angstroms to obtain a colorless product of improved purity. The invention also includes the polymerization of an unsaturated hydrocarbon with the sulfhydryl-terminated product to prepare a sulhydryl-terminated polythioether. These compounds are useful as chemical intermediates and precursors of elastomeric sealants, such as architectural sealants.

    摘要翻译： 公开了通过使波长高于约2600埃的紫外线引发的丙烯和硫化氢的反应来生产巯基封端的化合物的改进方法，以获得纯度提高的无色产物。 本发明还包括不饱和烃与巯基封端产物的聚合以制备硫醇封端的聚硫醚。 这些化合物可用作弹性体密封剂的化学中间体和前体，例如建筑密封剂。