Starch-containing microsphere and preparation method and use thereof

US11891458B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC CORP. · CN

Inventors

• Chao-Yie Yang · Hangzhou City, CN
• Chen Wang · Beijing, CN
• Zequn YIN · 东风镇, CN
• Quanjie Liu · 东风镇, CN

Key dates

• Filing date: Apr 6, 2022
• Grant date: Feb 6, 2024
• Expiry date: Apr 6, 2042

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B33/138
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A preparation method of the starch-containing microsphere includes the steps of first reacting starch with a low concentration of epichlorohydrin, and then reacting the resultant product with a surfactant, followed by final crosslinking to give microspheres. The starch-containing microspheres thus prepared are polydisperse starch-containing microspheres with a uniform particle size distribution, with the particle size being in a range of 0.1-500 μm.