N-(Hydroxy methyl)-1-amino alkane-1,1-diphosphonic acids, proces

Details N-(Hydroxy methyl)-1-amino alkane-1,1-diphosphonic acids, proces N-(Hydroxy methyl)-1-amino alkane-1,1-diphosphonic acids, proces

1980-08-14

1982-06-29

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

8111, 25218622, 25218629, C07F 938

Patent

active

043372147

ABSTRACT:
Disclosed are novel N-(hydroxy methyl)-1-amino alkane-1,1-diphosphonic acids and N,N-Bis-(hydroxy-methyl)-1-amino alkane-1,1-diphosphonic acids, preferably N-(hydroxy methyl)-1-amino ethane-1,1-diphosphonic acid, N,N-Bis-(hydroxy methyl)-1-amino ethane-1,1-diphosphonic acid, and their water-soluble salts. Also disclosed is a method for preparing these compounds by reacting the corresponding 1-amino alkane-1,1-diphosphonic acids with formaldehyde in an alkaline medium at elevated temperature. The new phosphonic acid compounds are excellent stabilizing agents for hydrogen peroxide-containing alkaline bleaching liquors, especially useful for bleaching cellulose fibers and blends thereof with synthetic fibers, such as polyester fibers.

REFERENCES:
patent: 3422139 (1969-01-01), Talet et al.
patent: 3860391 (1975-01-01), Kling et al.
patent: 4029696 (1977-06-01), Sommer et al.
patent: 4100067 (1978-07-01), Sommer et al.

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