63651-91-2Relevant academic research and scientific papers
Process for preparing chelating agents
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, (2008/06/13)
A process for preparing in high yield an isolable orthohydroxydiaminodicarboxylic acid which is useful as a metal chelating agent. The process comprises reacting a phenol (or mixture of phenols), a diaminodicarboxylic acid (or acid source), and a formaldehyde source in a medium having an acidic pH.
N,N-di-(hydroxybenzyl)-trimethylene diaminediacetic acids
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, (2008/06/13)
A novel chelating agent having the formula STR1 in whichA. EACH OF X1, X2, X3, and X4 is a member selected from the group consisting of (i) hydrogen; (ii) an alkyl group having 1-4 carbon atoms; (iii) --CN; (iv) --So3 M1 ; (v) --COOM1 ; (vi) --OM3 ; (vii) --NO2 ; (viii) --OH; and (ix) STR2 in which each of R1 and R2 is an alkyl group having 1-4 carbon atoms; B. each of M1, M2, M3, and M4 is a member selected from the group consisting of (i) a hydrogen ion; (ii) an alkali metal ion; (iii) one-half an alkaline earth metal ion; and (vi) an ammonium ion having the formula STR3 in which each of R3, R4, R5, and R6 is a member selected from the group consisting of (A) hydrogen; (B) an alkyl group having 1-4 carbon atoms; and (C) a hydroxyalkyl group having 1-4 carbon atoms; and C. Z is a member selected from the group consisting of (i) hydrogen; and (ii) hydroxyl.
