Light-colored polycarboxylated polysaccharide tanning agent, and preparation method and use thereof
US11834724B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2022 |
| Grant date | Dec 5, 2023 |
| Priority date | — |
| Expiry date | Mar 7, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/3072
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A light-colored polycarboxylated polysaccharide tanning agent, and a preparation method and use thereof are provided. The light-colored polycarboxylated polysaccharide tanning agent includes the following raw materials: a polysaccharide, an organic solvent, a catalyst, and hydrogen peroxide. Based on a weight of the polysaccharide, a weight of the organic solvent accounts for 1 wt % to 15 wt %, a weight of the catalyst accounts for 0.05 wt % to 2 wt %, and a weight of the hydrogen peroxide accounts for 30 wt % to 80 wt %. The preparation method provided by the present disclosure adopts a two-phase solution system. Compared with the existing preparation technologies, the preparation method of the present disclosure can efficiently extract and remove colored substances produced during an oxidation process, and can timely block a polymerization reaction of the colored substances with an oxidized polysaccharide, such as to significantly reduce a chromaticity of an oxidized product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.