Treatment of phosphate rock in soil to provide fertilizer and gy

Details Treatment of phosphate rock in soil to provide fertilizer and gy Treatment of phosphate rock in soil to provide fertilizer and gy

1975-03-10

1976-09-07

Hart, Charles N.

Chemistry: fertilizers

Processes and products

Inorganic material

71 53, C05B 100

Patent

active

039791998

ABSTRACT:
Pulverized phosphate rock is spread onto or mixed into soil which is to be fertilized. The soil is then treated with a solution of sulfurous acid, usually the output of a device which burns sulfur in air to form sulfur dioxide and then dissolves the sulfur dioxide in water. The water may be irrigation water which thereupon both irrigates the soil and reacts with the phosphate rock to fertilize the soil. Common phosphate ores include a substantial amount of calcium, with which, and with oxygen, the sulfurous acid reacts to form gypsum (calcium sulfate). Gypsum is a widely-used corrective substance applied to croplands, and the gypsum formed by this treatment reduces the requirement to purchase gypsum as a product separate from the fertilizer. Substantially all of the phosphorus contained in the rock can ultimately be solubilized as "available phosphate", with the use of this process.

REFERENCES:
patent: 1222112 (1917-04-01), Lipman
patent: 1326533 (1919-12-01), Sedtler
patent: 1819464 (1931-08-01), Holz
patent: 2097446 (1937-11-01), Clarborne
patent: 2499767 (1950-03-01), Maust
patent: 3177062 (1965-04-01), Hignett et al.
patent: 3337989 (1967-08-01), Harmon
patent: 3697248 (1972-10-01), Betts

Affiliated with

Also associated with

Rating

Treatment of phosphate rock in soil to provide fertilizer and gy does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Treatment of phosphate rock in soil to provide fertilizer and gy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Treatment of phosphate rock in soil to provide fertilizer and gy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2170768