公开(公告)号：US20240270675A1

公开(公告)日：2024-08-15

申请号：US18037550

申请日：2021-02-07

Applicant: SOOCHOW UNIVERSITY

Inventor： Xiaobing WAN ,  Yonggao ZHENG ,  Suyan TAO ,  Xingxing LI ,  Xionglue CHENG

IPC: C07C67/08

CPC classification number: C07C67/08 ,  C07C2531/02

Abstract: The present invention relates to a method for preparing a carboxylic acid ester compound. Under the catalysis of nitrite, a carboxylic acid reacts with an alcohol in air so as to obtain an ester compound; and the alcohol is ethanol, propanol or trifluoroethanol. The present invention has the advantages such as mild reaction conditions, rich source of raw materials, wide universality of reaction substrates, and simple operation, and can modify a series of carboxylic acids having medicinal properties and aliphatic carboxylic acids such as biologically active amino acids.

公开(公告)号：US20220364271A1

公开(公告)日：2022-11-17

申请号：US17618317

申请日：2021-05-20

Applicant: SOOCHOW UNIVERSITY

Inventor： Yuqing LIU ,  Qin LI ,  Xingxing LI ,  Yeke ZHANG ,  Zhong WANG ,  Guohe WANG ,  Zhijuan PAN

IPC: D01F2/08 ,  D01F1/10 ,  D01D1/02 ,  D01D5/06 ,  G07D7/02 ,  G07D7/06

Abstract: The invention relates to a method for preparing an anti-counterfeiting modal fiber, including: mixing a pulp stock solution with a cellulose catalyst, alkalizing, aging, sulfonating, and then dissolving the pulp stock solution in an alkaline solution to obtain a treatment solution; mixing the treatment solution with multiple amino acid-metal chelates, filtering, defoaming and ripening to obtain a spinning stock solution; and mixing the spinning stock solution with a spinning bath additive, and wet spinning, followed by drafting, defoaming, desulfurizing, water washing, and other post-treatments, to obtain an anti-counterfeiting modal fiber, wherein the amino acid metal-chelates account for 0.5%-1.5% by weight of the spinning stock solution. Amino acid-metal chelates are used to anti-counterfeit and encrypt the modal fibers, and the anti-counterfeiting and encrypting is involved in the spinning stock solution of modal fibers. The fiber source can be tracked and identified by detecting the species of metal elements and amino acids.