Production of animal feed grade biuret
AssigneeMoorman Manufacturing Company
InventorsKurt F. Stephan, John T. Stephan
Life of this patent
Estimating the term…
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.
Claims8
The process of preparing animal feed grade biuret, comprising;
- preparing a feedstock by heating a urea charge at a temperature of between about 145.degree. C. and about 16520 C. while simultaneously blowing a non-reactive gas at superatmospheric pressure through the molten urea charge at an aeration rate of from about two to about ten cubic feet of gas/hour/lb. of urea for at least about four hours and until the urea content of the product is reduced to between about 37% and about 25% urea, the cyanuric acid content is between about 3% and about 20% and the melting point of the product is between about 110.degree. C. and about 130.degree. C., by weight;
- cooling and comminuting the product to form such feedstock;
- containing the comminuted feedstock as a bed of several inches thickness in a recirculating oven, and passing heated recirculated gas through the bed of feedstock at a temperature slightly below the melting point of the feedstock until the urea content thereof is less than about 15% by weight.
The process of preparing animal feed grade biuret, comprising;
- preparing a feedstock by heating a urea charge at a temperature of between about 145.degree. C. and about 165.degree. C. while simultaneously blowing air at superatmospheric pressure through the molten urea charge at an aeration rate of from about two to about ten cubic feet of gas/hour/lb. of urea for at least about four hours and until the urea content of the product is reduced to between about 37% and about 25% urea, the cyanuric acid content is between about 3% and about 20%, and the melting point of the product is between about 115.degree. C. and about 125.degree. C., by weight;
- cooling and comminuting the product to form such feedstock;
- containing the comminuted feedstock as a bed of several inches thickness in a recirculating oven;
- and passing recirculated air through the bed of feedstock at a temperature slightly below the melting point of the feedstock until the urea content thereof is less than about 15% by weight.
Dependencies are inferred from the claim text.