Claims
- 1. A composition of matter comprising an aqueous solution comprising ammonium ferric nitrilotriacetate chelate and ammonium ferrous nitrilotriacetate chelate, the molar ratio of ammonium ferric nitrilotriacetate chelate to ammonium ferrous nitrilotriacetate chelate being from about 0.2 to about 6, and at least about 0.1 percent, molar basis, with respect to said ammonium ferric and ammonium ferrous nitrilotriacetate chelates, of aqueous ammonia, the solution having a pH of from about 5 to about 8.5, the total iron content of the solution being from about 0.5 to about 7 percent by weight, based on the weight of the iron and the solution, and the total concentration of sodium or potassium ions present being less than that sufficient to precipitate sodium or potassium ferrous nitrilotriacetic acid.
Parent Case Info
This is a continuation of application Ser. No. 381,346 filed Jul. 18, 1989, now abandoned which is in turn a division of Ser. No. 75,195, filed Jul. 16, 1987, now U.S. Pat. No. 4,859,436, which application is in turn a continuation of Ser. No. 769,196, filed on Aug. 23, 1985, now abandoned.
US Referenced Citations (22)
Divisions (1)
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Number |
Date |
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Parent |
75195 |
Jul 1987 |
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Continuations (2)
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Number |
Date |
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381346 |
Jul 1989 |
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Parent |
769196 |
Aug 1985 |
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