Chemistry: fertilizers – Processes and products – Forms or conditioning
Reexamination Certificate
2005-02-22
2005-02-22
Langel, Wayne A. (Department: 1754)
Chemistry: fertilizers
Processes and products
Forms or conditioning
C071S001000, C071S011000, C071S032000, C071S054000, C071S048000, C071S061000
Reexamination Certificate
active
06858058
ABSTRACT:
In a dry or concentrated liquid fertilizer when local water is added to dilute to a working concentration, the hardness components (e.g., Ca/Mg) in the local water react with the fertilizer components and begin to form low-solubility salts. These low-solubility salts form sludges in the working mixture and begin to scale up in the feeding tubes through which the liquid fertilizer is pumped. Furthermore, the fertilizer is deprived of the nutrient values of these low-solubility salts and, as a result, the economic value of the fertilizer is reduced. By adding excess sequestering agent(s) (i.e. above the amounts needed to dissolve the nutrients in the original fertilizer formulation) precipitation of the hardening components of the local water in the mixing tank, in the feeding tubes, and in the growing media is avoided, and previous scaling can be remedied.
REFERENCES:
patent: 3245776 (1966-04-01), Rubin
patent: 3961932 (1976-06-01), Miller
patent: 4012220 (1977-03-01), Szalay et al.
patent: 4319910 (1982-03-01), Meyer
patent: 4395273 (1983-07-01), Leutner et al.
patent: 4425149 (1984-01-01), Kimbro
patent: 4952229 (1990-08-01), Muir
patent: 5159094 (1992-10-01), Thunberg
patent: 5171349 (1992-12-01), Vetanovetz et al.
patent: 5274151 (1993-12-01), Thunberg
patent: 5308372 (1994-05-01), Daniels
patent: 5372626 (1994-12-01), Zivion et al.
Peters® Fertilizers,Salesman's Manual, Jul. 1977, pp. 8-9.
Peters® Fertilizers,Technical Manual, Jul. 1987, pp. 4-5, 142-143.
Conway et al. “Selecting and Using Chelating Agents”Chemical EngineeringMar. 1999.
Hampshire (W.R. Grace) “Chelating Agents” 1986 (brochure), no month.
Hampshire (W.R. Grace) “Chelating Agents” 1987 (brochure), no month.
Langel Wayne A.
Welsh & Katz Ltd.
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