Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1977-12-19
1979-01-16
Schor, Kenneth M.
Chemistry: fertilizers
Processes and products
Organic material-containing
71 37, 71 64DA, 423313, C05B 700, C05C 900, C01B 2528
Patent
active
041347501
ABSTRACT:
A process for the production of fertilizers from phosphoric and sulfuric acids, anhydrous ammonia, and urea, and more specifically, 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 P.sub.2 O.sub.5. 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. In addition, because of the low melt or slurry moisture content, the dryer (also used in most of the previous processes) 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 uncomplicated, relatively 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 with this process.
REFERENCES:
patent: 2945747 (1960-07-01), Nielsson
patent: 3419378 (1968-12-01), Kearns
patent: 3540874 (1970-11-01), Stinson
patent: 3578433 (1971-05-01), Bottai et al.
patent: 3825414 (1974-07-01), Lee et al.
patent: 3954942 (1976-05-01), Achorh et al.
Norton Melvin M.
Parker Byron R.
Petrusek Robert A.
Schor Kenneth M.
Tennessee Valley Authority
LandOfFree
Granular ammonium phosphate sulfate and urea-ammonium phosphate does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Granular ammonium phosphate sulfate and urea-ammonium phosphate , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Granular ammonium phosphate sulfate and urea-ammonium phosphate will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-650010