Process and apparatus for producing fat and nutritious defatted solids from fatty biological material containing water

Abstract

Abstract A PROCESS AND APPARATUS FOR DEHYDRATING AND DEFATTING FISH, SLAUGHTERHOUSE OFFAL, AND OTHER FATTY BIOLOGICAL MATERIALS CONTAINING WATER TO PRODUCE FAT AND A PALATABLE NUTRITIOUS SOLIDS RESIDUE. THE FATTY BIOLOGICAL MATERIAL IS FRAGMENTIZED AND CONTINUOUSLY INTRODUCED INTO A DISTILLATION VESSEL WITH ETHLENEDICHLORIDE OR OTHER SUITABLE FAT SOLVENT WHICH UNITES WITH THE WATER CONTENT OF THE MATERIAL TO FORM A LOW BOILING AZEOTROPE THAT IS DISTILLED OFF. SOLIDS FRAGMENTS DEHYDRATED AND DEFATTED IN THE DISTILLATION VESSEL ARE CONTINUOUSLY REMOVED HYDRAULICALLY BY RECIRCULATION OF FLUID BETWEEN THE VESSEL AND AN EXTERNAL SCREEN FROM WHICH THE SOLIDS MOVE INTO A WASHING AND SETTLING VESSEL FOR FINISH CLEANING OF FAT BY CLEAN SOLVENT. CLEAN SOLIDS SETTLING IN THE WASHING VESSEL ARE MECHANICALLY REMOVED. LIQUID EFFLUENT FROM THE SCREEN IS RETURNED TO THE DISTILLATION VESSEL, A PORTION OF THE EFFLUENT BEING BLED OFF AND FURTHER HEATED IN A DEHYDRATION VESSEL TO DRY THE RESIDUE OF SOLIDS ENTRAINED THEREIN WHEREUPON THE EFFLUENT FROM THE DEHYDRATION VESSEL IS FILTERED TO REMOVE THE DRIED SOLIDS AND SUBSEQUENTLY PROCESSED TO SEPARATE THE FAT AND SOLVENT CONSTITUENTS OF THE FILTERED LIQUID.

Inventors

• 👤 Ezra Levin

Bibliographic Details