中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

11 records (took 0.024 seconds)

    Process for continuously preparing di-C1-3-alkyl succinates
    2.
    发明授权
    Process for continuously preparing di-C1-3-alkyl succinates 有权

    公开(公告)号：US10047035B2

    公开(公告)日：2018-08-14

    申请号：US15659058

    申请日：2017-07-25

    Applicant: BASF SE

    Inventor： Stefanie Demming ,  Suman Thotla ,  Jens Wittenberg ,  Gabriele Iffland ,  Till Christian Brueggemann ,  Yvonne Hoelzl ,  Wolfgang Siegel ,  Stephan Freyer

    IPC: C07C67/48 ,  C07C67/08 ,  C07C67/54 ,  B01D3/14 ,  C07C69/40

    Abstract: The invention relates to a process for continuously preparing di-C1-3-alkyl succinates by reacting succinic acid with an C1-3-alkanol in the presence of a fixed-bed heterogeneous acidic esterification catalyst in a tubular reactor at a temperature in the range of from 60 to 100° C., wherein a mixture, comprising succinic acid, C1-3-alkanol, mono-C1-3-alkyl succinate, di-C1-3-alkyl succinate and water, is formed in a mixing stage and fed to the entrance of the tubular reactor, and wherein 5 to 75% of the outlet flow rate of the tubular reactor are recycled directly to the mixing stage as a recycle stream, and the molar ratio of C1-3-alkanol to succinic acid added to the mixing zone, and not including the C1-3-alkanol and succinic acid at the recycle stream, being in the range of from 2.0 to 9.5. The invention furthermore relates to a process for separating the reactor effluent of an esterification of succinic acid with an C1-3-alkanol to give di-C1-3-alkyl succinates by distillation, wherein the separation is performed in a divided wall column in which C1-3-alkanol and water are removed in a top draw of the column, di-C1-3-alkyl succinate is removed in a side draw of the column, and wherein mono-C1-3-alkyl succinate and succinic acid are removed in a bottom draw of the column.

    Process for preparing aqueous solutions of cobalt sulfate
    4.
    发明授权
    Process for preparing aqueous solutions of cobalt sulfate 有权
    制备硫酸钴水溶液的方法

    公开(公告)号：US09321656B2

    公开(公告)日：2016-04-26

    申请号：US14405025

    申请日：2013-07-02

    Applicant: BASF SE

    Inventor： Simon Schroedle ,  Peter Dransfeld ,  Gabriele Iffland ,  Ralf Boehling

    IPC: C01G51/10

    CPC classification number: C01G51/10 ,  C01P2006/80

    Abstract: Process for preparing an aqueous cobalt sulfate solution having a pH in the range from 5 to 8, wherein (a) metallic cobalt is dissolved in aqueous sulfuric acid in an atmosphere of low-oxygen air, of hydrogen or of inert gas and (b) the resulting acidic cobalt sulfate solution is purified in an ion exchanger.

    Abstract translation: 制备pH在5至8范围内的硫酸钴水溶液的方法，其中（a）金属钴在低氧空气，氢气或惰性气体的气氛中溶解在硫酸水溶液中，（b） 所得酸性硫酸钴溶液在离子交换器中纯化。

    Process for Producing Water-Absorbing Polymer Particles
    5.
    发明申请
    Process for Producing Water-Absorbing Polymer Particles 审中-公开
    生产吸水性聚合物颗粒的方法

    公开(公告)号：US20130200305A1

    公开(公告)日：2013-08-08

    申请号：US13759147

    申请日：2013-02-05

    Applicant: BASF SE

    Inventor： Karin Flore ,  Thomas Daniel ,  Agnes Voitl ,  Gabriele Iffland

    IPC: B01J20/30

    CPC classification number: B01J20/30 ,  B01J20/267 ,  C08F220/06 ,  C08F222/1006

    Abstract: A process for producing water-absorbing polymer particles by polymerizing an aqueous monomer solution or suspension comprising at least one ethylenically unsaturated monomer which bears acid groups and has been at least partly neutralized by addition of a neutralizing agent, wherein the neutralizing agent is filtered prior to the addition.

    Abstract translation: 通过聚合包含至少一种具有酸性基团并至少部分通过加入中和剂中和的烯属不饱和单体的含水单体溶液或悬浮液来生产吸水聚合物颗粒的方法，其中中和剂在 添加。

    PROCESS FOR CONTINUOUSLY PREPARING DI-C1-3-ALKYL SUCCINATES
    7.
    发明申请
    PROCESS FOR CONTINUOUSLY PREPARING DI-C1-3-ALKYL SUCCINATES 审中-公开

    公开(公告)号：US20170342015A1

    公开(公告)日：2017-11-30

    申请号：US15659058

    申请日：2017-07-25

    Applicant: BASF SE

    Inventor： Stefanie Demming ,  Suman Thotla ,  Jens Wittenberg ,  Gabriele Iffland ,  Till Christian Brueggemann ,  Yvonne Hoelzl ,  Wolfgang Siegel ,  Stephan Freyer

    IPC: C07C67/08 ,  B01D3/14 ,  C07C67/54 ,  C07C69/40

    CPC classification number: C07C67/08 ,  B01D3/141 ,  C07C67/54 ,  C07C69/40

    Abstract: The invention relates to a process for continuously preparing di-C1-3-alkyl succinates by reacting succinic acid with an C1-3-alkanol in the presence of a fixed-bed heterogeneous acidic esterification catalyst in a tubular reactor at a temperature in the range of from 60 to 100° C., wherein a mixture, comprising succinic acid, C1-3-alkanol, mono-C1-3-alkyl succinate, di-C1-3-alkyl succinate and water, is formed in a mixing stage and fed to the entrance of the tubular reactor, and wherein 5 to 75% of the outlet flow rate of the tubular reactor are recycled directly to the mixing stage as a recycle stream, and the molar ratio of C1-3-alkanol to succinic acid added to the mixing zone, and not including the C1-3-alkanol and succinic acid at the recycle stream, being in the range of from 2.0 to 9.5. The invention furthermore relates to a process for separating the reactor effluent of an esterification of succinic acid with an C1-3-alkanol to give di-C1-3-alkyl succinates by distillation, wherein the separation is performed in a divided wall column in which C1-3-alkanol and water are removed in a top draw of the column, di-C1-3-alkyl succinate is removed in a side draw of the column, and wherein mono-C1-3-alkyl succinate and succinic acid are removed in a bottom draw of the column.

    Process for continuously preparing di-C1-3-alkyl succinates
    8.
    发明授权
    Process for continuously preparing di-C1-3-alkyl succinates 有权

    公开(公告)号：US09738588B2

    公开(公告)日：2017-08-22

    申请号：US14888954

    申请日：2014-05-07

    Applicant: BASF SE

    Inventor： Stefanie Demming ,  Suman Thotla ,  Jens Wittenberg ,  Gabriele Iffland ,  Christian Brueggemann ,  Yvonne Hoelzl ,  Wolfgang Siegel ,  Stephan Freyer

    IPC: C07C67/08 ,  B01D3/14 ,  C07C67/54

    CPC classification number: C07C67/08 ,  B01D3/141 ,  C07C67/54 ,  C07C69/40

    Abstract: The invention relates to a process for continuously preparing di-C1-3-alkyl succinates by reacting succinic acid with an C1-3-alkanol in the presence of a fixed-bed heterogeneous acidic esterification catalyst in a tubular reactor at a temperature in the range of from 60 to 100° C., wherein a mixture, comprising succinic acid, C1-3-alkanol, mono-C1-3-alkyl succinate, di-C1-3-alkyl succinate and water, is formed in a mixing stage and fed to the entrance of the tubular reactor, and wherein 5 to 75% of the outlet flow rate of the tubular reactor are recycled directly to the mixing stage as a recycle stream, and the molar ratio of C1-3-alkanol to succinic acid added to the mixing zone, and not including the C1-3-alkanol and succinic acid at the recycle stream, being in the range of from 2.0 to 9.5. The invention furthermore relates to a process for separating the reactor effluent of an esterification of succinic acid with an C1-3-alkanol to give di-C1-3-alkyl succinates by distillation, wherein the separation is performed in a divided wall column in which C1-3-alkanol and water are removed in a top draw of the column, di-C1-3-alkyl succinate is removed in a side draw of the column, and wherein mono-C1-3-alkyl succinate and succinic acid are removed in a bottom draw of the column.

    PROCESS FOR PREPARING AQUEOUS SOLUTIONS OF COBALT SULFATE
    9.
    发明申请
    PROCESS FOR PREPARING AQUEOUS SOLUTIONS OF COBALT SULFATE 有权
    制备硫酸钴水溶液的方法

    公开(公告)号：US20150151981A1

    公开(公告)日：2015-06-04

    申请号：US14405025

    申请日：2013-07-02

    Applicant: BASF SE

    Inventor： Simon Schroedle ,  Peter Dransfeld ,  Gabriele Iffland ,  Ralf Boehling

    IPC: C01G51/10

    CPC classification number: C01G51/10 ,  C01P2006/80

    Abstract: Process for preparing an aqueous cobalt sulfate solution having a pH in the range from 5 to 8, wherein (a) metallic cobalt is dissolved in aqueous sulfuric acid in an atmosphere of low-oxygen air, of hydrogen or of inert gas and (b) the resulting acidic cobalt sulfate solution is purified in an ion exchanger.

    Abstract translation: 制备pH在5至8范围内的硫酸钴水溶液的方法，其中（a）金属钴在低氧空气，氢气或惰性气体的气氛中溶解在硫酸水溶液中，（b） 所得酸性硫酸钴溶液在离子交换器中纯化。

Patent Agency Ranking