Method of preparing slow release fertilizers containing a urea-paraffin wax adduct
First Claim
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1. METHOD WHICH COMPRISES FORMING SOLID DISCRETE SLOW RELEASE FERTILIZER PARTICLES COMPRISING A DISPERSION OF SOLID UREA IN A SOLID PARAFFIN WAX HAVING A MELTING POINT IN THE RANGE OF 110*-140*F., THE RATIO OF SAID SOLID UREA TO SAID SOLID PARAFFIN WAX BEING LESS THAN 3.16:
- 1, AGING SAID PARTICLES UNTIL A SUBSTANTIAL PORTION OF THE UREA THEREIN HAS REACTED WITH THE LOW MELT POINT PARAFFIN WAX THEREIN TO FORM A UREA-PARAFFIN WAX ADDUCT, WHEREBY DISCREATE PARTICLES COMPRISING A DISPERSION OF SAID UREA-PARAFFIN WAX ADDUCT IN WAX ARE OBTAINED, AND HOLDING THESE LATTER PARTICLES AT A TEMPERATURE IN EXCESS OF 100*F. UNTIL THE WATER RESISTANCE OF SAID LATTER PARTICLES HAS INCREASED SIGNIFICANTLY.
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1 Claim
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1. METHOD WHICH COMPRISES FORMING SOLID DISCRETE SLOW RELEASE FERTILIZER PARTICLES COMPRISING A DISPERSION OF SOLID UREA IN A SOLID PARAFFIN WAX HAVING A MELTING POINT IN THE RANGE OF 110*-140*F., THE RATIO OF SAID SOLID UREA TO SAID SOLID PARAFFIN WAX BEING LESS THAN 3.16:
- 1, AGING SAID PARTICLES UNTIL A SUBSTANTIAL PORTION OF THE UREA THEREIN HAS REACTED WITH THE LOW MELT POINT PARAFFIN WAX THEREIN TO FORM A UREA-PARAFFIN WAX ADDUCT, WHEREBY DISCREATE PARTICLES COMPRISING A DISPERSION OF SAID UREA-PARAFFIN WAX ADDUCT IN WAX ARE OBTAINED, AND HOLDING THESE LATTER PARTICLES AT A TEMPERATURE IN EXCESS OF 100*F. UNTIL THE WATER RESISTANCE OF SAID LATTER PARTICLES HAS INCREASED SIGNIFICANTLY.
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Current AssigneeRobert H. Campbell, Wesley R. Cherry
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Original AssigneeRobert H. Campbell, Wesley R. Cherry
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InventorsCampbell, Robert H., Cherry, Wesley R.
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Application NumberUS04/382,671Time in Patent Office1,008 DaysField of SearchUS Class Current71/28CPC Class CodesC05G 3/44 for affecting solubilityC05G 5/38 layered or coated with wax ...
