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US 8,802,891 B2Granted
Process for the manufacture of alkylamino alkylene phosphonic acids
AssigneeItalmatch Chemicals S.P.A.
InventorsPatrick P. B. Notte, Jan H. J. Van Bree, Albert Devaux
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Abstract
A process for the manufacture of alkylamino alkylene phosphonic acids is disclosed. In detail, a specific phosphonate is reacted with an agent selected to yield an alkylamino moiety substituted by a radical selected from OH, OR′, NH2, NHR′, N(R′)2, NH, N, S, S—S and SH in aqueous alkaline medium having a pH of 8 or higher at a temperature of 0° C. or higher.
Claims8
A process for the manufacture of alkylamino alkylene phosphonic acids having the formula:
- U—[X—N(W)(ZPO3M2)]s
- by reacting a phosphonic acid compound having the formula:
- Y—X—N(W)(ZPO3M2)
- with a precursor of the moiety:
- U
- the structural elements having the following meaning:
- Y is selected from:
- substituents the conjugated acid of which have a pKa equal to or smaller than 4.0;
- X is selected from C2-C50 linear, branched, cyclic or aromatic hydrocarbon chains, optionally substituted by a C1-C12 linear, branched, cyclic, or aromatic group, (which chain and/or which group can be) optionally substituted by OH, COOH, F, OR′, R2O[AO]x wherein R2 is a C1-C50 linear, branched, cyclic or aromatic hydrocarbon chain, and SR′ moieties, wherein R′ is a C1-C50 linear, branched, cyclic or aromatic hydrocarbon chain, optionally substituted by C1-C12 linear, branched, cyclic or aromatic hydrocarbon groups, (said chains and/or groups can be) optionally substituted by COOH, OH, F, OR′ and SR′;
- and [A-O]x-A wherein A is a C2-C9 linear, branched, cyclic or aromatic hydrocarbon chain and x is an integer from 1 to 200;
- Z is a C1-C6 alkylene chain;
- M is selected from H and C1-C20 linear, branched, cyclic or aromatic hydrocarbon chains;
- W is selected from H, ZPO3M2 and [V—N(K)]nK, wherein V is selected from:
- a C2-C50 linear, branched, cyclic or aromatic hydrocarbon chain, optionally substituted by Ci-C12 linear, branched, cyclic or aromatic groups, (which chains and/or groups can be) optionally substituted by OH, COOH, F, OR′, R2O[A-O]x— wherein R2 is a C1-C50 linear, branched, cyclic or aromatic hydrocarbon chain, and SR′ moieties;
- and from [A-O]x-A wherein A is a C2-C9 linear, branched, cyclic or aromatic hydrocarbon chain and x is an integer from 1 to 200;
- K is ZPO3M2 or H and n is an integer from 0 to 200;
- and
- U is a moiety selected from NH2, NHR′, N(R′)2, NH, N, S, SH, and S—S wherein R′ is as defined above;
- s is 1 in the event U stands for NH2, NHR′, N(R′)2, or HS;
- s is 2 in the event U stands for NH, S or S—S;
- and s is 3 in the event U stands for N;
- in aqueous medium, having a pH of 8 or more, at a temperature of 0° C. or higher.
19 more elements
Dependencies are inferred from the claim text.