Curing agent for disposal of municipal solid waste incineration (MSWI) fly ash and preparation method and use method thereof

US11919811B1 · kind B1 · utility

Assignee

• Dalian University of Technology · CN

Inventors

• Baomin Wang · Seattle, US
• Chengcheng Fan · Dalian, CN
• Xiao Han · Beijing, CN
• Tianru Li · Dalian, CN
• Yunqing Xing · Dalian, CN
• Xiong Zhang · Bellevue, US
• Sai An · Dalian, CN
• Ze YU · Nanjing, CN
• Wanli Wang · Dalian, CN

Key dates

• Filing date: Apr 25, 2023
• Grant date: Mar 5, 2024
• Expiry date: Apr 25, 2043

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/91
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A curing agent for disposal of municipal solid waste incineration (MSWI) fly ash and a preparation method and use method thereof are provided. In the present disclosure, a loofah nanofiber crystal, a rice husk ash (RHA), sodium hydroxide, and water are adopted as raw materials to prepare the curing agent, and the curing agent can effectively realize the safe disposal and curing of heavy metals in an MSWI fly ash. The highest curing rates of the curing agent for heavy metals Pb2+, Zn2+, Cd2+, Cr3+, and Cu2+ can reach 99.7%, 99.4%, 99.5%, 98.7%, and 99.5%, respectively. The special three-dimensional (3D) cross-linked network structure of the loofah nanofiber crystal and the excellent physical and chemical adsorption properties and ion exchange capacity of the RHA are fully used in the curing agent of the present disclosure.