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    Process for preparing precipitated silica
    1.
    发明授权
    Process for preparing precipitated silica 有权

    公开(公告)号：US10011495B2

    公开(公告)日：2018-07-03

    申请号：US14373801

    申请日：2013-01-23

    Applicant: RHODIA OPERATIONS

    Inventor： Emmanuelle Allain

    IPC: C01B33/12 ,  C01B33/193

    CPC classification number: C01B33/128 ,  C01B33/193

    Abstract: A process for preparing precipitated silica in which: (i) an stock having a concentration of alkali metal M silicate less than 20 g/L is formed; (ii) acid is added to said initial stock, until at least 50% of the amount of M2O is neutralized; (iii) silicate and acid are simultaneously added, such that the degree of consolidation is greater than 4 and at most 100; and (v) acid is added until a pH value of between 2.5 and 5.3 is obtained, wherein the acid used in at least one of the process steps is a concentrated acid.

    Process for preparing precipitated silica
    4.
    发明授权
    Process for preparing precipitated silica 有权

    公开(公告)号：US10011494B2

    公开(公告)日：2018-07-03

    申请号：US14373799

    申请日：2013-01-23

    Applicant: RHODIA OPERATIONS

    Inventor： Emmanuelle Allain ,  Sylvaine Neveu

    IPC: C01B33/12 ,  C01B33/193

    CPC classification number: C01B33/128 ,  C01B33/193

    Abstract: A process for preparing precipitated silica in which: (i) an aqueous stock having a concentration of alkali metal silicate less than 20 g/L is formed; (ii) acid is added to said initial stock, until at least 50% of the amount of M2O is neutralized; (iii) silicate and acid are simultaneously added, such that the degree of consolidation is greater than 4 and at most 100; (iv) silicate and acid are simultaneously added, such that the pH of the reaction medium is between 7 and 10; (v) acid is added until a pH value of between 2.5 and 5.3 is obtained; and (vi) the reaction medium is placed in contact with acid and silicate, such that the pH is between 2.5 and 5.3, wherein the acid used in at least one of the process steps is a concentrated acid.

    Process for preparing precipitated silica
    6.
    发明申请
    Process for preparing precipitated silica 有权
    沉淀二氧化硅的制备方法

    公开(公告)号：US20150037235A1

    公开(公告)日：2015-02-05

    申请号：US14373797

    申请日：2013-01-23

    Applicant: RHODIA OPERATIONS

    Inventor： Emmanuelle Allain ,  Sylvaine Neveu

    IPC: C01B33/12

    CPC classification number: C01B33/128 ,  C01B33/193

    Abstract: A process for preparing precipitated silicas in which: (i) an aqueous stock with a pH of between 2 and 5 is formed; (ii) silicate and acid are simultaneously added to said stock, such that the pH of the resulting reaction medium is maintained between 2 and 5; (iii) silicate is added until a pH value of between 7 and 10 is obtained; (iv) silicate and acid are simultaneously added, such that the pH of the reaction medium is between 7 and 10; (v) acid is added until a pH value of between 2.5 and 5.3 is obtained; and (vi) the reaction medium is placed in contact with acid and silicate, such that the pH is between 2.5 and 5.3; wherein the acid used in at least one of the process steps is a concentrated acid.

    Abstract translation: 一种制备沉淀二氧化硅的方法，其中：（i）形成pH为2至5的水性原料; （ii）将硅酸盐和酸同时加入到所述原料中，使得所得反应介质的pH保持在2和5之间; （iii）加入硅酸盐直到获得7至10的pH值; （iv）同时加入硅酸盐和酸，使得反应介质的pH为7至10; （v）加入酸直至获得2.5至5.3的pH值; 和（vi）使反应介质与酸和硅酸盐接触，使得pH在2.5和5.3之间; 其中在至少一个工艺步骤中使用的酸是浓酸。

    Process for preparing precipitated silica
    7.
    发明申请
    Process for preparing precipitated silica 有权
    沉淀二氧化硅的制备方法

    公开(公告)号：US20150030519A1

    公开(公告)日：2015-01-29

    申请号：US14373801

    申请日：2013-01-23

    Applicant: RHODIA OPERATIONS

    Inventor： Emmanuelle Allain

    IPC: C01B33/12

    CPC classification number: C01B33/128 ,  C01B33/193

    Abstract: A process for preparing precipitated silica in which: (i) an stock having a concentration of alkali metal M silicate less than 20 g/L is formed; (ii) acid is added to said initial stock, until at least 50% of the amount of M2O is neutralized; (iii) silicate and acid are simultaneously added, such that the degree of consolidation is greater than 4 and at most 100; and (v) acid is added until a pH value of between 2.5 and 5.3 is obtained, wherein the acid used in at least one of the process steps is a concentrated acid.

    Abstract translation: 一种制备沉淀二氧化硅的方法，其中：（i）形成具有碱金属M硅酸盐浓度小于20g / L的原料; （ii）将酸加入到所述初始原料中，直到M 2 O的至少50％被中和; （iii）同时加入硅酸盐和酸，使得固结度大于4并且至多为100; 并且（v）加入酸直至获得2.5至5.3之间的pH值，其中在至少一个工艺步骤中使用的酸是浓缩酸。

    Process for preparing precipitated silica
    8.
    发明授权
    Process for preparing precipitated silica 有权

    公开(公告)号：US09695054B2

    公开(公告)日：2017-07-04

    申请号：US14373797

    申请日：2013-01-23

    Applicant: RHODIA OPERATIONS

    Inventor： Emmanuelle Allain ,  Sylvaine Neveu

    IPC: C01B33/12 ,  C01B33/193

    CPC classification number: C01B33/128 ,  C01B33/193

    Abstract: A process for preparing precipitated silicas in which: (i) an aqueous stock with a pH of between 2 and 5 is formed; (ii) silicate and acid are simultaneously added to said stock, such that the pH of the resulting reaction medium is maintained between 2 and 5; (iii) silicate is added until a pH value of between 7 and 10 is obtained; (iv) silicate and acid are simultaneously added, such that the pH of the reaction medium is between 7 and 10; (v) acid is added until a pH value of between 2.5 and 5.3 is obtained; and (vi) the reaction medium is placed in contact with acid and silicate, such that the pH is between 2.5 and 5.3; wherein the acid used in at least one of the process steps is a concentrated acid.

    Process for preparing precipitated silica
    9.
    发明申请
    Process for preparing precipitated silica 有权
    沉淀二氧化硅的制备方法

    公开(公告)号：US20150266743A1

    公开(公告)日：2015-09-24

    申请号：US14373799

    申请日：2013-01-23

    Applicant: RHODIA OPERATIONS

    Inventor： Emmanuelle Allain ,  Sylvaine Neveu

    IPC: C01B33/12

    CPC classification number: C01B33/128 ,  C01B33/193

    Abstract: A process for preparing precipitated silica in which: (i) an aqueous stock having a concentration of alkali metal silicate less than 20 g/L is formed; (ii) acid is added to said initial stock, until at least 50% of the amount of M2O is neutralized; (iii) silicate and acid are simultaneously added, such that the degree of consolidation is greater than 4 and at most 100; (iv) silicate and acid are simultaneously added, such that the pH of the reaction medium is between 7 and 10; (v) acid is added until a pH value of between 2.5 and 5.3 is obtained; and (vi) the reaction medium is placed in contact with acid and silicate, such that the pH is between 2.5 and 5.3, wherein the acid used in at least one of the process steps is a concentrated acid.

    Abstract translation: 一种制备沉淀二氧化硅的方法，其中：（i）形成具有碱金属硅酸盐浓度低于20g / L的水性原料; （ii）将酸加入到所述初始原料中，直到M 2 O的至少50％被中和; （iii）同时加入硅酸盐和酸，使得固结度大于4并且至多为100; （iv）同时加入硅酸盐和酸，使得反应介质的pH为7至10; （v）加入酸直至获得2.5至5.3的pH值; 和（vi）将反应介质与酸和硅酸盐接触，使得pH在2.5和5.3之间，其中在至少一个工艺步骤中使用的酸是浓酸。

    Process for preparing precipitated silica having specific morphology, particle size and porosity
    10.
    发明申请
    Process for preparing precipitated silica having specific morphology, particle size and porosity 有权
    制备具有特定形态，粒度和孔隙率的沉淀二氧化硅的方法

    公开(公告)号：US20150030518A1

    公开(公告)日：2015-01-29

    申请号：US14373791

    申请日：2013-01-23

    Applicant: RHODIA OPERATIONS

    Inventor： Emmanuelle Allain ,  Sylvaine Neveu

    IPC: C01B33/12

    CPC classification number: C01B33/128 ,  C01B33/193

    Abstract: The invention relates to a process for the preparation of precipitated silica formed of aggregates of large primary silica particles, at the surface of which occur small primary silica particles, in which the acid used in at least one of the process steps is a concentrated acid.

    Abstract translation: 本发明涉及一种制备沉淀二氧化硅的方法，所述沉淀二氧化硅由大的一次二氧化硅颗粒的聚集体形成，其表面出现小的一次二氧化硅颗粒，其中至少一个工艺步骤中使用的酸是浓酸。

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