Lignocellulose fiber composite with soil conditioners

Details Lignocellulose fiber composite with soil conditioners Lignocellulose fiber composite with soil conditioners

2005-02-15

2005-02-15

Sayala, C. (Department: 1761)

Chemistry: fertilizers

Processes and products

Organic material-containing

C071S027000, C071S031000, C071S054000, C071S061000

Reexamination Certificate

active

06855182

ABSTRACT:
A pellet for use in conditioning soil made of a lignocellulose fiber matrix having up to 20% by weight of a soil conditioning material incorporated therein. The soil conditioning material comprises one or more synthetic soil conditioning polymers and, optionally, additional soil enhancing additives such as fertilizers, gypsum, and calcium salts. The preferred lignocellulose materials are pulp fibers with an alpha-cellulose purity of greater than about 75% by weight, with preferred lignin content of no higher than 10%. The soil conditioning polymers are preferably polyacrylamides (PAMs) or modified PAMs, but may be a combination of other soil conditioning polymers. The pellet is produced by dispersing the polymers into a bath of lignocellulose fibers. The dispersion is then formed into pellets with a pelletizing machine such that the polymer and other soil conditioning material is interspersed within the matrix formed by the pelletized lignocellulose.

REFERENCES:
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patent: 6383609 (2002-05-01), Annergren et al.
patent: 6395051 (2002-05-01), Arnold et al.
patent: WO 9722744 (1997-06-01), None
Seybold, C.A.; “Polyacrylamide Review: Soil Conditioning and Environmental Fate”;Commun Soil Sci. Plant Anal., 25 (11 & 12), 2171-2185 (1994).
Barvenik, Frank W.; “Polyacrylamide Characteristics Related to Soil Applications”;Soil Science; vol. 158, No. 4, pp. 235-243; Oct. 1994.
Kirk-Othmer, “Soil Stabilization”;Encyclopedia of Chemical Technology; vol. 22, pp. 457-464 (1977).

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