Process and apparatus for preparing manganese thiosulfate (MnTS) solution
US7914763B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2010 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Feb 15, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05D9/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An efficient semi-continuous preparation of manganese thiosulfate (MnS2O3, MnTS) from manganese hydrosulfite and sulfur at elevated temperature is described. Manganese hydrosulfite is prepared from commercial manganese carbonate and sulfur dioxide. The resulting product is an emulation of liquid manganese thiosulfate and solid by-products. A manganese thiosulfate solution is produced according to the invention by use of certain mole ratios of MgCO3 to sulfur, and certain parameters such as the temperature of the reaction process and the pH conditions, including rate and duration of SO2 purging, which causes the by-products to be reduced to less than 2% by weight. The resulting manganese thiosulfate is a pinkish liquid with concentration up to 20%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.