Fortified gypsum granule

Details Fortified gypsum granule Fortified gypsum granule

1975-08-13

1977-04-05

Spear, Jr., Frank A.

Chemistry: fertilizers

Processes and products

Inorganic material

71 63, 71 64DC, 423517, 106109, C05D 302

Patent

active

040159728

ABSTRACT:
A sulfur fortified gypsum granule is provided, preferably adapted for agricultural uses so as to give a timed release of sulfate nutrients in soil comprising a combination of at least about 5 percent by weight of elemental sulfur and a major proportion of calcium sulfate which combination has been roll pressure compacted at a mixture temperature of about 110.degree.-230.degree. F to form hard granular shapes.

REFERENCES:
patent: 499710 (1893-06-01), Bronson
patent: 780240 (1905-01-01), Spitzer
patent: 1470260 (1923-10-01), Emerson
patent: 3809566 (1974-05-01), Revord
patent: 3820970 (1974-06-01), Watkins
patent: 3860409 (1975-01-01), Wilson

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