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公开(公告)号：US20210292569A1
公开(公告)日：2021-09-23
申请号：US17253303
申请日：2019-06-19
申请人： TRONOX LLC
摘要： Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps: an aqueous suspension of titanium dioxide pigments is formed, in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment, in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate, and in a third step, a layer of magnesium oxide and alumina is precipitated on the layer of alumina. Also included are titanium dioxide pigments made by the disclosed process and method using said pigments in paper manufacturing.
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公开(公告)号：US20220333310A1
公开(公告)日：2022-10-20
申请号：US17850524
申请日：2022-06-27
申请人： TRONOX LLC
摘要： Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps: an aqueous suspension of titanium dioxide pigments is formed, in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment, in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate, and in a third step, a layer of magnesium oxide and alumina is precipitated on the layer of alumina. Also included are titanium dioxide pigments made by the disclosed process and method using said pigments in paper manufacturing.
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3.发明申请公开(公告)号：US20210262171A1
公开(公告)日：2021-08-26
申请号：US17253404
申请日：2019-06-19
申请人： TRONOX LLC
摘要： Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps: an aqueous suspension of titanium dioxide pigments is formed, in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment, in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate, and in an optional third step, a layer of magnesium oxide is precipitated on the layer of alumina Titanium dioxide pigments made by the disclosed process and method using said pigments in paper manufacturing are also disclosed.
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公开(公告)号：US11371190B2
公开(公告)日：2022-06-28
申请号：US17253303
申请日：2019-06-19
申请人： TRONOX LLC
摘要： Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps: an aqueous suspension of titanium dioxide pigments is formed, in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment, in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate, and in a third step, a layer of magnesium oxide and alumina is precipitated on the layer of alumina. Also included are titanium dioxide pigments made by the disclosed process and method using said pigments in paper manufacturing.
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5.发明授权公开(公告)号：US12110634B2
公开(公告)日：2024-10-08
申请号：US17253404
申请日：2019-06-19
申请人： TRONOX LLC
CPC分类号： D21H21/285 , C09C1/3661 , C09C3/063 , D21H17/675 , D21H17/69 , D21H17/73 , C01P2004/03 , C01P2004/04 , C01P2004/80 , C01P2004/84 , C01P2006/12
摘要： Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps: an aqueous suspension of titanium dioxide pigments is formed, in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment, in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate, and in an optional third step, a layer of magnesium oxide is precipitated on the layer of alumina. Titanium dioxide pigments made by the disclosed process and method using said pigments in paper manufacturing are also disclosed.
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