High-efficiency method for converting limestone to slaked lime
US12246991B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Nov 24, 2024 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Nov 24, 2044 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00019
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A chemical processing method includes decomposing a metal carbonate in a first tube by exposure to a first quantity of heat, producing a metal oxide and carbon dioxide; and hydrating the metal oxide in a second tube concentric with the first, by exposure to steam, producing a metal hydroxide and a second quantity of heat. The partial pressure of the steam and/or of the carbon dioxide is controlled so that the hydration reaction occurs at a second temperature above a first temperature at which the decomposition reaction occurs. The inner one of the concentric tubes has an inner tube wall. At least some of the second quantity of heat flows from the second tube through the inner tube wall to the first tube, providing at least a part of the first quantity of heat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.