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公开(公告)号：US11813589B2
公开(公告)日：2023-11-14
申请号：US16757523
申请日：2018-10-31
Applicant: BASF SE
Inventor： Kristine Hartnagel , Wanthip Poomsuwan , Patrick Neal Hamilton , Norbert Herfert , Thomas Daniel , Olaf Hoeller
IPC: B01J20/32 , A61L15/18 , A61L15/24 , A61L15/60 , B01J20/02 , B01J20/26 , B01J20/30 , C08J3/07 , C08J3/12 , C08J3/24
CPC classification number: B01J20/3236 , A61L15/18 , A61L15/24 , A61L15/60 , B01J20/0292 , B01J20/267 , B01J20/3021 , C08J3/07 , C08J3/12 , C08J3/245 , B01J2220/68 , C08J2333/02
Abstract: In an improved superabsorbent complexed with aluminum ions, the aluminum ions are applied in the form of an aqueous solution comprising aluminum ions, which has the feature that it comprises aluminum ions in a proportion within the range of 0.5%-15% by weight (converted if appropriate to Al3+), based on the total mass of the solution, and further comprises anions of lactic acid (lactate ions) and phosphoric acid (phosphate ions), where the molar proportion of the lactate ions is within the range of 0.01-2.99 times the molar amount of Al3+ and the molar proportion of the phosphate ions is within the range of 0.01-2.99 times the molar amount of Al3+.
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公开(公告)号：US20210187479A1
公开(公告)日：2021-06-24
申请号：US16757523
申请日：2018-10-31
Applicant: BASF SE
Inventor： Kristine Hartnagel , Wanthip Poomsuwan , Patrick Neal Hamilton , Norbert Herfert , Thomas Daniel , Olaf Hoeller
IPC: B01J20/32 , A61L15/60 , A61L15/24 , A61L15/18 , B01J20/26 , B01J20/30 , B01J20/02 , C08J3/12 , C08J3/24 , C08J3/07
Abstract: In an improved superabsorbent complexed with aluminum ions, the aluminum ions are applied in the form of an aqueous solution comprising aluminum ions, which has the feature that it comprises aluminum ions in a proportion within the range of 0.5%-15% by weight (converted if appropriate to Al3+), based on the total mass of the solution, and further comprises anions of lactic acid (lactate ions) and phosphoric acid (phosphate ions), where the molar proportion of the lactate ions is within the range of 0.01-2.99 times the molar amount of Al3+ and the molar proportion of the phosphate ions is within the range of 0.01-2.99 times the molar amount of Al3+.
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公开(公告)号：US10226753B2
公开(公告)日：2019-03-12
申请号：US15746492
申请日：2016-07-21
Applicant: BASF SE
Inventor： Norbert Herfert , Wanthip Poomsuwan , Thomas Gieger
IPC: B01J20/26 , A61L15/60 , C08F2/01 , C08F2/10 , C08F220/06 , C09D183/08 , C08J3/12 , C08L33/02 , A61L15/22 , B01J19/06 , B01J20/30 , C08J3/24 , C08G77/28
Abstract: The invention relates to a process for producing superabsorbents, comprising the preparation of partly neutralized acrylic acid by the steps (i) preparing an over-neutralized acrylic acid having a degree of neutralization of at least 100.1 mol-% by mixing of an acrylic acid 1 and a base and (ii) preparing a neutralized acrylic acid having a degree of neutralization from 50 to 85 mol-% by mixing of the over-neutralized acrylic acid and an acrylic acid 2, wherein the content of dimeric acrylic acid in the acrylic acid 2 is lower than the content of dimeric acrylic acid in the acrylic acid 1.
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公开(公告)号：US20180200691A1
公开(公告)日：2018-07-19
申请号：US15746492
申请日：2016-07-21
Applicant: BASF SE
Inventor： Norbert Herfert , Wanthip Poomsuwan , Thomas Gieger
CPC classification number: B01J20/267 , A61L15/225 , A61L15/60 , B01J19/06 , B01J20/261 , B01J20/3085 , B01J2219/00076 , B01J2219/0015 , C08F2/01 , C08F2/10 , C08F220/06 , C08G77/28 , C08J3/12 , C08J3/247 , C08J2333/02 , C08L33/02 , C09D183/08
Abstract: The invention relates to a process for producing superabsorbents, comprising the preparation of partly neutralized acrylic acid by the steps (i) preparing an over-neutralized acrylic acid having a degree of neutralization of at least 100.1 mol-% by mixing of an acrylic acid 1 and a base and (ii) preparing a neutralized acrylic acid having a degree of neutralization from 50 to 85 mol-% by mixing of the over-neutralized acrylic acid and an acrylic acid 2, wherein the content of dimeric acrylic acid in the acrylic acid 2 is lower than the content of dimeric acrylic acid in the acrylic acid 1.
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