公开(公告)号：WO2005097678A1

公开(公告)日：2005-10-20

申请号：PCT/SE2005/000488

申请日：2005-04-05

Applicant: AKZO NOBEL N.V. ,  EKA CHEMICALS AB ,  NYANDER, Johan ,  MANKIN, Glenn

Inventor： NYANDER, Johan ,  MANKIN, Glenn

IPC: C01B33/143

CPC classification number: C01B33/1435 ,  D21H17/68 ,  D21H21/10

Abstract: The present invention relates to a process for producing an aqueous silica-based sol which comprises: (a) providing a cationic ion exchange resin having at least part of its ion exchange capacity in hydrogen form; (b) bringing said ion exchange resin in contact with an aqueous alkali metal silicate to form an aqueous slurry; (c) stirring said aqueous slurry until the pH of the aqueous phase is in the range of from 5.0 to 11.5; and/or alternatively, stirring said aqueous slurry to allow particle aggregation or microgel formation corresponding to an S value up to 45 %, and obtain a pH of the aqueous phase of at least 5.0; (d) adjusting the pH of said aqueous phase to above 9.0 using one or more materials comprising at least one aluminium compound; and (e)separating said ion exchange resin from the aqueous phase after step (c) or after step (d). The invention also relates to a silica-based sol having an S value within the range of from 15 to 25 %, mole ratio Si:Al in the range of from 20:1 to 50:1, mole ratio Si:X, where X = alkali metal, in the range of from 5:1 to 17:1, SiO 2 content of at least 5 % by weight and containing silica-based particles having a specific surface area of at least 300 m 2 /g. The invention further relates to process for producing paper which comprises: (i) providing an aqueous suspension comprising cellulosic fibres; (j) adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention; and (k) dewatering the obtained suspension to provide a sheet or web of paper.

Abstract translation: 本发明涉及一种二氧化硅水溶胶的制备方法，其包括：（a）提供具有氢形式的至少部分离子交换容量的阳离子离子交换树脂; （b）使所述离子交换树脂与碱金属硅酸盐水溶液接触以形成含水浆料; （c）搅拌所述含水浆料直到水相的pH在5.0至11.5的范围内; 和/或可选地，搅拌所述含水浆料以允许对应于高达45％的S值的颗粒聚集或微凝胶形成，并且获得水相的pH至少为5.0; （d）使用包含至少一种铝化合物的一种或多种材料将所述水相的pH调节至9.0以上; 和（e）在步骤（c）之后或步骤（d）之后将所述离子交换树脂与水相分离。 本发明还涉及一种二氧化硅基溶胶，其S值在15至25％范围内，摩尔比Si:Al在20:1至50:1的范围内，摩尔比Si：X，其中X =碱金属，范围为5:1至17:1，SiO 2含量为至少5重量％，并且含有比表面积至少为300m 2 / g的二氧化硅基颗粒。 本发明还涉及生产纸的方法，其包括：（i）提供包含纤维素纤维的水性悬浮液; （j）向悬浮液中加入一种或多种包含根据本发明的二氧化硅基溶胶的引流和助留剂; 和（k）将获得的悬浮液脱水以提供纸张或纸幅。

公开(公告)号：WO2005100241A8

公开(公告)日：2007-03-01

申请号：PCT/SE2005000489

申请日：2005-04-05

Applicant: AKZO NOBEL NV ,  EKA CHEMICALS AB ,  MANKIN GLENN ,  TOKARZ MAREK ,  HANSSON FREDDIE

Inventor： MANKIN GLENN ,  TOKARZ MAREK ,  HANSSON FREDDIE

IPC: C01B33/143 ,  C01B33/14 ,  D21H17/68 ,  D21H21/10

CPC classification number: C01B33/1435 ,  D21H17/68 ,  D21H21/10

Abstract: The invention relates to a process for producing an aqueous silica-based sol which comprises: (a) providing a cationic ion exchange resin having at least part of its ion exchange capacity in hydrogen form; (b) bringing said ion exchange resin in contact with an aqueous alkali metal silicate to form an aqueous slurry; (c) stirring said aqueous slurry until the pH of the aqueous phase is in the range of from 5.0 to 8.0; (d) adjusting the pH of said aqueous phase to above 9.0; and (e) separating said ion exchange resin from the aqueous phase after step (c) or after step (d). The invention also relates to an aqueous silica-based sol obtainable by the processes as well as a process for producing paper which comprises (i) providing an aqueous suspension comprising cellulosic fibres; (j) adding to the suspension one or more drainage and retention aids comprising an aqueous silica-based sol according to the invention; and (k) dewatering the obtained suspension to provide a sheet or web of paper.

Abstract translation: 本发明涉及一种生产水性二氧化硅基溶胶的方法，其包括：（a）提供具有氢形式的至少一部分离子交换容量的阳离子离子交换树脂; （b）使所述离子交换树脂与碱金属硅酸盐水溶液接触以形成含水浆料; （c）搅拌所述含水浆料直到水相的pH为5.0-8.0; （d）将所述水相的pH调节至9.0以上; 和（e）在步骤（c）之后或步骤（d）之后将所述离子交换树脂与水相分离。 本发明还涉及通过该方法获得的含水二氧化硅基溶胶以及生产纸的方法，其包括（i）提供包含纤维素纤维的水性悬浮液; （j）向悬浮液中加入一种或多种包含本发明水性二氧化硅基溶胶的排水和助留剂; 和（k）将获得的悬浮液脱水以提供纸张或纸幅。

公开(公告)号：WO2005100241A1

公开(公告)日：2005-10-27

申请号：PCT/SE2005/000489

申请日：2005-04-05

Applicant: AKZO NOBEL N.V. ,  EKA CHEMICALS AB ,  MANKIN, Glenn ,  TOKARZ, Marek ,  HANSSON, Freddie

Inventor： MANKIN, Glenn ,  TOKARZ, Marek ,  HANSSON, Freddie

IPC: C01B33/143

CPC classification number: C01B33/1435 ,  D21H17/68 ,  D21H21/10

Abstract: The invention relates to a process for producing an aqueous silica-based sol which comprises: (a) providing a cationic ion exchange resin having at least part of its ion exchange capacity in hydrogen form; (b) bringing said ion exchange resin in contact with an aqueous alkali metal silicate to form an aqueous slurry; (c) stirring said aqueous slurry until the pH of the aqueous phase is in the range of from 5.0 to 8.0; (d) adjusting the pH of said aqueous phase to above 9.0; and (e) separating said ion exchange resin from the aqueous phase after step (c) or after step (d). The invention also relates to an aqueous silica-based sol obtainable by the processes as well as a process for producing paper which comprises (i) providing an aqueous suspension comprising cellulosic fibres; (j) adding to the suspension one or more drainage and retention aids comprising an aqueous silica-based sol according to the invention; and (k) dewatering the obtained suspension to provide a sheet or web of paper.

Abstract translation: 本发明涉及一种生产水性二氧化硅基溶胶的方法，其包括：（a）提供具有氢形式的至少一部分离子交换容量的阳离子离子交换树脂; （b）使所述离子交换树脂与碱金属硅酸盐水溶液接触以形成含水浆料; （c）搅拌所述含水浆料直到水相的pH为5.0-8.0; （d）将所述水相的pH调节至9.0以上; 和（e）在步骤（c）之后或步骤（d）之后将所述离子交换树脂与水相分离。 本发明还涉及通过该方法获得的含水二氧化硅基溶胶以及生产纸的方法，其包括（i）提供包含纤维素纤维的水性悬浮液; （j）向悬浮液中加入一种或多种包含本发明水性二氧化硅基溶胶的排水和助留剂; 和（k）将获得的悬浮液脱水以提供纸张或纸幅。