Multi-functional plugging agent for coal mine and preparation method thereof
US11691043B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2022 |
| Grant date | Jul 4, 2023 |
| Priority date | — |
| Expiry date | Jul 19, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21F15/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is a multi-functional plugging agent for a coal mine and a preparation method thereof. The preparation method comprises: by taking Ecklonia Kurome Okam as a raw material, mixing an Ecklonia Kurome Okam suspension with phosphorus pentoxide for reaction, then performing biodegradation to obtain an Ecklonia Kurome Okam biological extract, adding urea for neutralization, mixing a neutralization product with an inorganic catalyst and melamine for reaction to obtain a bio-based plugging synergist solution, finally cooling the bio-based plugging synergist solution, and mixing the cooled bio-based plugging synergist solution with a certain amount of pentaerythritol and ammonium polyphosphate to obtain the multi-functional plugging agent for the coal mine based on the Ecklonia Kurome Okam biological extract. According to the invention, not only a coal crack can be effectively plugged for a long time, but also an efficient flame-retardant effect can be achieved in a complete period of coal spontaneous combustion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.