Abstract: Process for the production of technical grade biuret, readily in a form suitable for use as animal feed, by the controlled pyrolysis of urea in two stages, the first stage involving the partial pyrolysis of urea at a temperature above the melting point of urea to produce a first stage intermediate reaction product containing from about 20% to about 60% urea, and not more than about 25% cyanuric acid by weight, such reaction product being then cooled and comminuted, the comminuted product then being subjected, in solid form and in the absence of a liquid carrier, to a temperature at or slightly below the softening point of the solid particulate (suitable at a temperature of from about 100.degree. C. to about 140.degree. C.) with forced air circulation through the comminuted product for a sufficient time to lower its urea content by partial sublimation of the urea and partial further reaction thereof to biuret with only minimal further conversion of urea to cyanuric acid.

Abstract: Preparation of a composition particularly suitable for use as feedstock in the production of animal feed grade biuret by solid state pyrolyzation thereof in a recirculating oven, which composition comprises from about 37% to about 25% urea, from about 45% to about 60% biuret, and from about 3% to about 20% cyanuric acid, by weight, such preparation involving sparging air or other non-reactive gas through a urea charge at a temperature of from about 145.degree. C. to about 165.degree. C. and at a rate of between about two to about ten cu. ft. of gas/hr/lb of urea for a period of at least four hours, then cooling and comminuting the product.

Abstract: A fish bait and method of production thereof wherein a nonhomogeneous body having a toughened exterior skinlike structure surrounding a gelatinous or fluid body is formed by mixing a gel-forming proteinaceous material and water at a temperature above the sol-gel transition temperature, forming the proteinaceous mass into the desired shape, cooling the shaped mass and treating the exterior surface of the shaped mass with a polymeric tanning agent such as a sulfited melamine formaldehyde resin, resulting in a relatively insoluble skin surrounding a relatively soluble fluid gel center structure. Fluidizing agents reactive with the polymeric tanning agents may be added to alter the gel characteristics, and salmon egg waste material and other fish cannery wastes may be incorporated as part or all of the proteinaceous material to provide the characteristic odor associated with salmon eggs.