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Publication numberUST969002 I4
Publication typeGrant
Application numberUS 05/818,602
Publication dateApr 4, 1978
Filing dateJul 25, 1977
Priority dateJul 25, 1977
Also published asUS4134750
Publication number05818602, 818602, US T969002 I4, US T969002I4, US-I4-T969002, UST969002 I4, UST969002I4
InventorsMelvin M. Norton, Byron R. Parker
Original AssigneeTennessee Valley Authority
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Granular ammonium phosphate sulfate and urea-ammonium phosphate sulfate using a common pipe-cross reactor
US T969002 I4
process for production of fertilizers from phosphoric and sulfuric acids, anhydrous ammonia, and urea, and for the production of high-analysis granular ammonium phosphates, ammonium phosphate sulfates, and urea-ammonium phosphate sulfates--some with polyphosphate contents of up to 68 percent of the total P2 O5. A specially designed pipe-cross reactor is used to produce a homogeneous melt or slurry of low moisture content from the reactants and thus eliminates the need for a preneutralizer as used in many prior-art granular fertilizer processes. Because of the low melt or slurry moisture content, the dryer is eliminated. The elimination of these two items greatly simplifies pollution abatement, since both items are sources of fumes and dust. The equipment used to produce granular monoammonium phosphate, diammonium phosphate, urea-ammonium phosphate sulfate, and ammonium phosphate sulfate fertilizers is inexpensive and simple to operate. The products produced are dust-free and of such particle size that they are well suited for bulk blends. Ammonium phosphate sulfate grades of 12-48-0, 6-24-24, 13-13-13, 10-40-10, a monoammonium phosphate grade of 11-55-0, a diammonium phosphate and diammonium phosphate sulfate grade of 18-46-0, and urea-ammonium phosphate sulfate grades of 33-11-0, 17-17-17, and 20-10-10 have been produced.
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5984992 *May 7, 1997Nov 16, 1999Unity, Inc.Sewage sludge recycling with a pipe cross-reactor
US6159263 *Oct 12, 1999Dec 12, 2000Unity, Inc.Sewage sludge recycling with a pipe cross-reactor
US6758879Dec 12, 2000Jul 6, 2004Unity, Inc.Sewage sludge recycling with a pipe cross-reactor
US7128880 *Dec 19, 2002Oct 31, 2006Environmental Technologies Capital Partners LlcOrganic recycling with a pipe-cross or tubular reactor
U.S. Classification71/29, 71/43, 71/37, 71/34, 423/313
International ClassificationC05B7/00
Cooperative ClassificationC05B7/00
European ClassificationC05B7/00