Process for treating black liquor to precipitate organic materials therefrom
Abstract
Abstract A NOVEL PROCESS FOR TREATING BLACK LIQUOR OF THE KIND PRODUCED AS A BY-PRODUCT IN THE SULFATE PROCESS FOR MAKING KRAFT PAPER AND, ALSO, NOVEL PRODUCTS PRODUCED BY THE TREATING PROCESS. THE PROCESS COMPRISES USING SODIUM BISULFATE OR THE LIKE TO PRECIPITATE ORGANIC MATERIALS FROM THE LIQUOR UNDER CONDITIONS SUCH AS TO AVOID ANY SUBSTANTIAL DECOMPOSITION OF THE ORGANIC MATERIALS AND, IN THE MOST ADVANTAGEOUS EMBODIMENTS OF THE INVENTION, USING UREAFORMALDEHYDE, OR OTHER UREA-ALDEHYDE REACTANTS, AS MEANS TO INCREASE THE EFFICIENCY OF THE PRECIPITATION AND MAKE THE SOLID PRODUCT MORE BENEFICIAL AS A GROWTH PROMOTING AGRICULTURAL PRODUCT. THE TREATED BLACK LIQUOR, AFTER REMOVAL OF THE PRECIPITATED MATERIALS, IS SUITABLE FOR RECYCLE TO THE PULP-MAKING PLANT.
Inventors
- 👤 C Ferguson
Bibliographic Details
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| 3.5 Years (Year 4) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
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