Abstract: Provided are crosslinked polyvinylpyrrolidone (PVPP) compositions and their use in beverage treatment. Provided is a dry, direct compressed tablet comprising at lease 70 wt % crosslinked PVPP. Also provided is the use of said tablet for the filtering and/or removing polyphenol of a liquid, preferable a beverage.
Type:
Grant
Filed:
October 5, 2016
Date of Patent:
December 27, 2022
Assignee:
Boai NKY Medical Holdings Ltd.
Inventors:
Herbert Wilhelm Ulmer, Jianqiang Wang, Xiwen He
Abstract: Disclosed is a polymerization inhibitor of N-vinyl pyrrolidone monomers and use thereof. The polymerization inhibitor is selected from an inorganic weak acid potassium salt and/or an organic acid potassium salt. The polymerization inhibitor is added to N-vinyl pyrrolidone monomers, and is sealed and preserved under the protection of inert gas, wherein the addition amount of the polymerization inhibitor is 0.005-0.2% by mass with respect to the mass of the N-vinyl pyrrolidone monomers. Directly adding the polymerization inhibitor into the N-vinyl pyrrolidone monomers in proportion can inhibit the self-polymerization of the N-vinyl pyrrolidone monomers, and hence extend the shelf life. The chromaticity and toxicity of the monomers can be reduced to a great extent. The polymerization inhibitor can be used directly during solution polymerization without being removed, and does not affect the chromaticity of a polymerization solution.
Type:
Application
Filed:
November 27, 2018
Publication date:
February 11, 2021
Applicant:
BOAI NKY MEDICAL HOLDINGS LTD
Inventors:
Xudong SUN, Lei NIU, Senlin ZHANG, Haipeng LI