US 4,176,117 A · Process for obtaining gelatin

Abstract

The invention relates to the manufacture of gelatin, whereby the gelatin is obtained from fresh derms removed from scraps of hides, sinews and tendons within the three hours following the slaughter of the animal; these materials are collected together and washed in cold water then in a solution of dilute sodium hydroxide, subjected to a mechanical separation of fibres until they are reduced to paste, they are then washed several times in cold water in order to eliminate the albumin of the blood, the paste thus washed and rinsed is filtered by pressing until a cake is obtained which is formed of pure collagen; said latter may be stored after dehydration for an indefinite length of time; it may then be subjected to the final cooking, producing a gelatin broth subjected to gelling on a conveyor belt circulating in a chamber maintained at 5.degree. C. and associated with a drying chamber provided with a blower and in which the film of gelatin is conveyed on conveyor belts, the film being wound on a reel on leaving the drying chamber.

Claims11

Dependent claims

A process for manufacturing gelatin from collagen, said collagen being prepared from animal waste, wherein said animal waste forming the raw materials and constituted by scraps of hides, sinews, tendons, are treated immediately after slaughter of the animal and are subjected to the following successive operations:

(a) the raw materials (derms of hides, sinews or tendons) are washed and de-greased in a solution of sodium hydroxide enabling the pores to dilate and facilitating elimination of the blood and fatty substances;
(b) the materials are subjected to a chopping operation reducing them to the state of paste.
(c) the pH of the paste is adjusted to neutralise the sodium hydroxide returning from initial washing phase (a) and the paste thus returned to a neutral pH is washed several times in cold water and rinsed.
(d) the paste is then subjected to filtration by pressing to express the water therefrom and to conserve only the solid matter forming the cake constituted by substantially pure collagen.

1 more element

A process for separating collagen from animal waste such as scraps of hides, wherein said scraps of hides are treated immediately after slaughter of the animal, thus allowing the albuminous substances such as the blood to be eliminated by washing and avoiding coagulation and fixation of said albuminous substances inside the capillary vessels of the skin, comprising the following successive steps:

(a) subjecting animal hides, or scraps of hides to scraping and slitting to eliminate adhesions or the internal fat as well as the epiderm containing the hair and its roots, so as to conserve only the derm;
(b) washing and degreasing said derms in a solution of sodium hydroxide to allow expansion of the pores and to eliminate fatty substances and blood albumin, before its coagulation, this washing occuring less than 24 hours after slaughter of the animal;
(c) subjecting the degreased derms to a physical chopping operation to reduce the material to the state of a paste;
(d) adjusting the pH of the paste to neutralize the sodium hydroxide resulting from the washing of step (b), washing the neutralized paste several times in cold water, and rinsing the paste;
(e) subjecting the rinsed paste to filtration by pressing to express the water therefrom to conserve only the solid matter forming a cake constituted by substantially pure collagen
all the steps above occuring in less than twenty four hours after slaughter of the animal from which said waste has been obtained.

3 more elements

Dependencies are inferred from the claim text.

Process for obtaining gelatin

Life of this patent

Process for obtaining gelatin

Life of this patent

Abstract

Claims11