| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 11.99 |
| PATENT ASSIGNEE | Solvay Minerals |
| PATENT CLAIMS |
Mfg process - Introducing soda ash into aq soln of Na bisulfite to form feed liquor of Na bisulfite & Na sulfite - Introducing SO2 into liquor & converting Na sulfite to bisulfite to form reaction liquor having dissolved SO2 - Introducing soda ash into said liquor to react with SO2 to form Na bisulfite - Cooling liquor to precipitate Na metabisulfite & form a mo ther liquor - Separating Na metabisulfite from mother liquor & recy cling the liquor |
| PATENT PHOTOCOPY | Available on request |
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