Process for producing a solid nitrogenous fertilizer

Claim 1

THE METHOD OF PREPARING A SOLID NITROGENOUS FERTILIZER MATERIAL WHICH COMPRISES ADMIXING SEWAGE SLUDGE, PEAT MOSS AND SOLID UREA IN PROPORTIONS TO FORM A SOLIDS MIXTURE IN WHICH THE WEIGHT RATIO OF SEWAGE SLUDGE TO PEAT MOSS IS BETWEEN ABOUT 1:1 AND ABOUT 15:1 AND THE SOLID UREA IS PRESENT IN AMOUNT OF BETWEEN ABOUT 30% AND ABOUT 50% BY WEIGHT OF THE SOLIDS MIXTURE HAVING A PARTICLE SOLID COMPENENTS IN SAID SOLIDS MIXTURE HAVING A PARTICLE SIZE LESS THAN ABOUT 4 MESH, SUBSEQUENTLY ADDING AND MIXING FOR A PERIOD OF ABOUT 1/2 MINUTE TO ABOUT 2 MINUTES AN AQUEOUS SOLUTION OF UREA FORMALDEHYDE HAVING A UREA TO FORMALDEHYDE MOLAR RATIO OF LESS THAN ABOUT 1.3:1 AND AN AQUEOUS SOLUTION OF A STRONG MINERAL ACID THERETO, SAID AQUEOUS SOLUTION OF UREA FORMALDEBEING ADDED IN PROPORTIONS TO PROVIDE A UREA TO FORMALDEHYDE MOLAR RATIO IN THE MIXTURE OF BETWEEN ABOUT 1.3:1 AND ABOUT 1.8:1, SAID MINERAL ACID SOLUTION BEING ADDED IN AN AMOUNT TO ADJUST THE PH OF THE UREA FORMALDEHYDE SOLUTION TO BETWEEN ABOUT 1 AND 3, WHEREBY POLYMERIZATION AND CONDENSATION OF UREA FORMALDEHYDE IS AFFORDED, ADDING AN AQUEOUS AMMONIA SOLUTION TO THE RESULTING MIXTURE IN AT LEAST THE STOICHIOMETRIC PROPORTION REQUIRED TO FORM AN AMMONIUM SALT WITH THE ANIONIC COMPONENT OF THE MINERAL ACID PRESENT IN THE MIXTURE, ADMIXING THE REACTANTS UNTIL A SUBSTANTIALLY HOMOGENEOUS MIXTURE CONTAINING IN AXCESS OF ABOUT 12% BY WEIGHT NITROGEN IS FORMED, AND CURING SAID HOMOGENEOUS MIXTURE.

Claim 2

THE METHOD OF PREPARING A SOLID NITROGENOUS FERTILIZER MATERIAL WHICH COMPRISES ADMIXING SEWAGE SLUDGE, PEAT MOSS AND SOLID UREA IN PROPORTIONS TO FORM A SOLIDS MIXTURE IN WHICH THE WEIGHT RATIO OF SEWAGE SLUDGE TO PEAT MOSS IS BETWEEN ABOUT 1:1 AND ABOUT 15:1 AND THE SOLID UREA IS PRESENT IN AMOUNT OF BETWEEN ABOUT 30% AND ABOUT 50% BY WEIGHT OF THE SOLIDS MIXTURE HAVING A PARTICLE SOLID COMPENENTS IN SAID SOLIDS MIXTURE HAVING A PARTICLE SIZE LESS THAN ABOUT 4 MESH, SUBSEQUENTLY ADDING AND MIXING FOR A PERIOD OF ABOUT 1/2 MINUTE TO ABOUT 2 MINUTES AN AQUEOUS SOLUTION OF UREA FORMALDEHYDE HAVING A UREA TO FORMALDEHYDE MOLAR RATIO OF LESS THAN ABOUT 1.3:1 AND AN AQUEOUS SOLUTION OF A STRONG MINERAL ACID THERETO, SAID AQUEOUS SOLUTION OF UREA FORMALDEBEING ADDED IN PROPORTIONS TO PROVIDE A UREA TO FORMALDEHYDE MOLAR RATIO IN THE MIXTURE OF BETWEEN ABOUT 1.3:1 AND ABOUT 1.8:1, SAID MINERAL ACID SOLUTION BEING ADDED IN AN AMOUNT TO ADJUST THE PH OF THE UREA FORMALDEHYDE SOLUTION TO BETWEEN ABOUT 1 AND 3, WHEREBY POLYMERIZATION AND CONDENSATION OF UREA FORMALDEHYDE IS AFFORDED, ADDING AN AQUEOUS AMMONIA SOLUTION TO THE RESULTING MIXTURE IN AT LEAST THE STOICHIOMETRIC PROPORTION REQUIRED TO FORM AN AMMONIUM SALT WITH THE ANIONIC COMPONENT OF THE MINERAL ACID PRESENT IN THE MIXTURE, ADMIXING THE REACTANTS UNTIL A SUBSTANTIALLY HOMOGENEOUS MIXTURE CONTAINING IN AXCESS OF ABOUT 12% BY WEIGHT NITROGEN IS FORMED, AND CURING SAID HOMOGENEOUS MIXTURE.