N-Phosphono-methylene-amino-phosphonic acid derivs. - useful as chelating agents, e.g. for softening water and fertilizer prodn

Phosphonic acids of formula R1R2(PO3H2)C.(CH2)n.NR3R4 (I) are new. In (I) n is 0-4. R1 is H, 1-11C alkyl, OH, (CH2)nPO3H, C2H4OH, (CH2)nCOOH. (CH2)nNR3R4 or (CH2)nC(PO3H2)nR3R4. R3 and R4 are H or CH2PO3H2, and R2 is H or PO3H2. (I) are prepd. e.g. by reacting the corresp. prim. amine (R3=R4=H), wit...

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Bibliographische Detailangaben
Hauptverfasser:	SOMMER,KLAUS,.DR, RAAB,GUENTER
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM CHEMISTRY IMPREGNATING OR COATING OF PAPER METALLURGY ORGANIC CHEMISTRY PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Zusammenfassung:	Phosphonic acids of formula R1R2(PO3H2)C.(CH2)n.NR3R4 (I) are new. In (I) n is 0-4. R1 is H, 1-11C alkyl, OH, (CH2)nPO3H, C2H4OH, (CH2)nCOOH. (CH2)nNR3R4 or (CH2)nC(PO3H2)nR3R4. R3 and R4 are H or CH2PO3H2, and R2 is H or PO3H2. (I) are prepd. e.g. by reacting the corresp. prim. amine (R3=R4=H), with HCHO and H3PO3 in ratio of at least 1:1:1.5-1:2:2.5 at high temp. (I) are chelating agents for di- and polyvalent metal ions and are useful e.g. in textile treating baths, in paper mfr. and in tanning. They have very high solubility in water and good stability to hydrolysis permitting use at 100 degrees C.