Lubricant-binder for pressure forming of particulate solids

Abstract From the Canadian patent

This invention provides an improved pelleting or extruding method for particulate solids comprising the addition of a granular solid protein, specifically collagen,or gelatin to the particulate solid mixture prior to or simultaneously with pelleting or extruding. Preferably the protein has a, particle size of not greater than about minus 25 mesh. Further preferably, the granular protein is present in admixture with an adjuvant which serves to increase the lubricating effect of the protein. The adjuvant include anionic polymers inorganic salts, i.e. metal salts of both inorganic and inorganic acids, as well as wholly organic salts such as urea and derivatives thereof. Other useful adjuvants …