Method for drying magnesium sulfate
US4244698A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1978 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | May 2, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B3/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of drying hydrated crystalline magnesium sulfate to reduce its surface moisture content is disclosed. The method comprises: (a) fluidizing a bed of hydrated crystalline magnesium sulfate particles by continuously passing a heated gaseous medium in a generally upwardly direction through the particles at a superficial velocity at least sufficient to maintain turbulent fluidization and mixing of the particles throughout the bed; (b) transferring a dispersed form of hydrated crystalline magnesium sulfate to be dried into the fluidized bed; (c) maintaining the amount of crystalline magnesium sulfate within the fluidized bed at a constant depth; (d) controlling the temperature and relative humidity of the heated gaseous medium to maintain a bed temperature and humidity sufficient to vaporize at least a portion of the surface moisture from the hydrated crystalline magnesium sulfate without removing waters of hydration; and (e) removing dried hydrated crystalline magnesium sulfate from the bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.