C - Chemistry – Metallurgy – 09 – H
Patent
C - Chemistry, Metallurgy
09
H
6/48, 99/51
C09H 1/02 (2006.01)
Patent
CA 1133657
ABSTRACT OF THE DISCLOSURE A continuous process of preparing low fat stab- ilized bone particularly suited for producing high quality gelatin from trimmed raw bone which is pref- erably crushed in a pre-hogger and fed continuously to a screw type press mounted within a cage having a choke and perforations in the wall of the cage through which soft non-bone material is extruded. The pressed bone which is recovered separately from the soft non-bone material has n substantially re- duced content of fat and meat tissue. The pressed bone preferably after further reducing in the size thereof is heated in an oven preferably in the ab- sence of air and in a superheated steam atmosphere to a temperature up to 250-F (121°C) which crisps the fat and meat tissue adhering to the pieces of bone so that the crisp fat and meat tissue is read- ily separated from the bone during the heating, tum- bling and screening thereof. The baked crushed bone preferably after cooling is subjected to a dry sep- aration treatment by first passing the heated crush- ed bone over a sizing screen which removes particles over and under a selected particle size range. The material having the selected particle size range is then continuously subjected to gravity separation by depositing the selected material on a vibrating screen air table on which the high density clean stabilized bone particles climb to the upper end of the air table and are collected as final product separately from the low density fat and meat tissue particles which are concentrated at the lower end of the air table. The undersize material from the screen mixer is fed to a separate gravity separator vibrating screen air table from which fine high density clean, stabilized bone is recovered. The light bone and meat meal is recovered separately from the high density low fat stabilized bone.
340943
Darling-Delaware Co. Inc.
Meredith & Finlayson
LandOfFree
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