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

1974-08-19

1976-10-05

Hart, Charles N.

Chemistry: fertilizers

Processes and products

Organic material-containing

71 54, 71 63, 71 64F, 71 64SC, C05F 500

Patent

active

039842258

ABSTRACT:
Spent sulfite liquor is converted into a nitrogen containing, water insoluble product useful as a soil conditioner and as a slow-release fertilizer. The spent sulfite liquor is reacted at a temperature of from 170.degree. to 250.degree.C with hexamethylenetetramine or with an ammonia-formaldehyde mixture. The weight ratio of hexamethylenetetramine or ammonia and formaldehyde to SSL solids should be greater than about 0.5:1 and preferably greater than 1:1.

REFERENCES:
patent: 2279200 (1942-04-01), Keenen

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