Patents by Inventor Wanthip Poomsuwan

Wanthip Poomsuwan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Superabsorbent complexed with aluminum ions
    Patent number: 11813589
    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+.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: November 14, 2023
    Assignee: BASF SE
    Inventors: Kristine Hartnagel, Wanthip Poomsuwan, Patrick Neal Hamilton, Norbert Herfert, Thomas Daniel, Olaf Hoeller
  • SUPER ABSORBER
    Publication number: 20210187479
    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+.
    Type: Application
    Filed: October 31, 2018
    Publication date: June 24, 2021
    Inventors: Kristine Hartnagel, Wanthip Poomsuwan, Patrick Neal Hamilton, Norbert Herfert, Thomas Daniel, Olaf Hoeller
  • Process for producing superabsorbents
    Patent number: 10226753
    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.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: March 12, 2019
    Assignees: BASF SE, BASF (THAI) LTD.
    Inventors: Norbert Herfert, Wanthip Poomsuwan, Thomas Gieger
  • PROCESS FOR PRODUCING SUPERABSORBENTS
    Publication number: 20180200691
    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.
    Type: Application
    Filed: July 21, 2016
    Publication date: July 19, 2018
    Inventors: Norbert Herfert, Wanthip Poomsuwan, Thomas Gieger