Chemistry of carbon compounds – Dipeptides – e.g. – aspartame – anserine – carnosine – etc.
Patent
1979-10-31
1981-04-28
Sutto, Anton H.
Chemistry of carbon compounds
Dipeptides, e.g., aspartame, anserine, carnosine, etc.
260963, 260966, C07F 909
Patent
active
042645344
ABSTRACT:
A process is provided for removing soluble metallic salts, such as calcium, copper, zinc, magnesium, tin, iron, or mixtures thereof, from a phosphate ester functional fluid. The process comprises contacting the functional fluid with an effective amount of a chelating agent capable of precipitating at least part of the metallic salts contained therein to form a precipitate, and subsequently separating the precipitate from the functional fluid. A preferred chelating agent is ethylenediaminetetraacetic acid, its alkali metal, alkaline earth or ammonium salts. The process is particularly useful in the reclamation of used triaryl phosphate esters, particularly tert-butylphenyl phenyl phosphates, containing the aforementioned soluble metallic salts.
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Martell et al., "Chemistry of the Metal Chelate Compounds," Prentice-Hall, Inc. (1956), p. 511.
Stauffer Chemical Company
Sutto Anton H.
Zall Michael E.
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