Soil conditioners and fertilizers from spent sulfite liquor

Details Soil conditioners and fertilizers from spent sulfite liquor Soil conditioners and fertilizers from spent sulfite liquor

C - Chemistry, Metallurgy

08

H

260/133

C08H 8/00 (2010.01) C05C 3/00 (2006.01)

Patent

CA 1037469

- 1 - Soil Conditioners and Fertilizers from Spent Sulfite Liquor Abstract of the Disclosure Spent sulfite liquor is converted into a nitrogen containing, water insoluble product useful as a soil con- ditioner and as a slow-release fertilizer. The spent sulfite liquor is reacted at a temperature of from 150 to 250°C with hexamethylenetetramine or with an ammonia- formaldehyde mixture. The weight ratio of hexamethylene- tetramine or ammonia and formaldehyde to SSL solids should be greater than about 0.5:1 and preferably greater than 1:1. - 1 -

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