Solid, water-insoluble polypeptides having ionizable side chains

Details Solid, water-insoluble polypeptides having ionizable side chains Solid, water-insoluble polypeptides having ionizable side chains

1974-05-30

1976-04-06

Anderson, Harold D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

1283355, 210 38B, 210500M, 260 21R, 260 292N, 260 312N, 260 334R, 260 78SC, C08G 6910, C08G 6948

Patent

active

039488632

ABSTRACT:
Solid bodies of polypeptides having repeating units of aspartic, glutamic, and aminoadipic esters are reacted with hydrazine or an amine having at least two NH.sub.2 groups until the ester moieties of the side chains are partly converted to the hydrazines or amides, and the side chains are partly crosslinked hydrazides other units by reaction with the hydrazine or diamine so as to make the polypeptide insoluble and infusible. The remaining ester moieties are saponified, and the resulting hydrophilic, but water-insoluble solid acts as an ampholyte in contact with water or other polar solvents. It may be used for capturing heavy metal ions from their aqueous solutions.

REFERENCES:
patent: 3436372 (1969-04-01), Hoegger
patent: 3585161 (1971-06-01), Akamatsu et al.
patent: 3787482 (1974-01-01), Bersworth
patent: 3867352 (1974-05-01), Akamatsu et al.
Flory - Principles of Polymer Chemistry, 1953, pp. 75-78, 102-103.

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