Repairing material for emergency treatment of black and odorous surface water environment and its preparation method
US12365603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2022 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Dec 2, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/02
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The disclosure provides a repairing material for emergency treatment of a black and odorous surface water environment and its preparation method, belonging to the fields of environmental science and engineering technology. The preparation method of the disclosure specifically includes the following steps: (1) uniformly stirring activated carbon, calcium chloride, ammonia water solution, polyethylene glycol and water in a stirrer, then dropwise adding hydrogen peroxide, and after the completion of the dropwise adding, obtaining a calcium peroxide repairing material solution; (2) adding a sodium hydroxide solution to the calcium peroxide repairing material solution obtained in step (1) until a pH reaches 11.5, thereby obtaining a suspension; (3) centrifuging the suspension in step (2) to obtain a solid; and (4) washing the solid in step (3) with distilled water until a final pH of residual water reaches 8.4, and then drying the obtained precipitate to obtain the repairing material. The repairing material of the disclosure has good treatment effect and high efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.