Chemistry: natural resins or derivatives; peptides or proteins; – Proteins – i.e. – more than 100 amino acid residues – Scleroproteins – e.g. – fibroin – elastin – silk – etc.
Patent
1998-11-03
1999-06-01
Tsang, Cecilia J.
Chemistry: natural resins or derivatives; peptides or proteins;
Proteins, i.e., more than 100 amino acid residues
Scleroproteins, e.g., fibroin, elastin, silk, etc.
530356, 530355, 1061601, 8517, A61K 3817, C08H 100
Patent
active
059089210
ABSTRACT:
The present invention is a process for the manufacture of gelatin which includes providing a collagen containing material and demineralizing the collagen containing material to produce ossein. The ossein is added to a water solution containing at least 3% sodium hydroxide or potassium hydroxide and at least 3% sodium sulfate for a time sufficient to form a reacted slurry. The reacted slurry is heated to a temperature of at least 45.degree. C. for a time sufficient to solubilize the ossein thereby producing a solution containing gelatin. The pH of the solution containing gelatin is raised to greater than 9.8. The pH of the solution containing gelatin is reduced with a sulfate salt of a divalent or trivalent metal to a neutral pH (between 7.0 and 8.0). The pH of the gelatin solution is then lowered to between 5.0 and 6.0 and a polymeric flocculant is added to the gelatin solution in an amount of less than 0.1% based on the dry weight of the gelatin to form a floc and the floc is removed. The resulting gelatin is filtered and desalted.
REFERENCES:
patent: 3514518 (1970-05-01), Charier-Vadrot
patent: 4360590 (1982-11-01), Tomka et al.
patent: 4824939 (1989-04-01), Simpson
patent: 5459241 (1995-10-01), Moy et al.
Brand John S.
LaRoche Scott W.
Roy David J.
Eastman Kodak Company
Jameison Fabian A.
Ruoff Carl F.
Tsang Cecilia J.
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