Product comprising lime or limestone and Graham's salt or M.sub.x P.sub.n O.sub.(3N+1)
US4237025A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1978 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Sep 25, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/501
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In the process of removing oxides of sulfur from gases, comprising the step of contacting, at 2.degree.-100.degree. C., components comprising water, calcium ions, and sulfite ions or bisulfite ions to form a sludge, the improvement comprising contacting said components in the presence of dissolved Graham's salt or a dissolved polymer of the formula M.sub.x P.sub.n O.sub.(3n+1) to form a sludge having improved properties, wherein M is a cation, n is a positive integer greater than 1, x is (n+2)/y, and y is the valence of M. Resulting sludge and new composition of matter, comprising lime or limestone mixed with Graham's salt or M.sub.x P.sub.n O.sub.(3n+1), which is useful in performing the process, are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.