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Class Information
Number: 71/39
Name: Chemistry: fertilizers > Processes and products > Inorganic material > Phosphorus-containing > Phosphates > Acid treatment > Nitric and hydrochloric
Description: Processes wherein the acid supplied is HNO3 or HCl mixed in the liquid state.

Patents under this class:

Patent Number Title Of Patent Date Issued
7452398 Phosphate and potash(PK)-containing compound fertilizer Nov. 18, 2008
7278063 Method and system for performing a hardware trace Oct. 2, 2007
5676005 Wire-drawing lubricant and method of use Oct. 14, 1997
5098461 Phosphatic and nitrogen fertilizers via HNO.sub.3 processing Mar. 24, 1992
4515615 Manufacturing and using nitrogen fertilizer solutions on a farm May. 7, 1985
4512794 Manufacturing and using nitrogen fertilizer solutions on a farm Apr. 23, 1985
4511389 Manufacturing and using nitrogen fertilizer solutions on a farm Apr. 16, 1985
T105302 Tamper-resistant container Apr. 2, 1985
4323386 Method of manufacturing NP- or NPK-containing fertilizers from magnesium containing phosphate Apr. 6, 1982
4308049 Process for the absorption of ammonia in acid solutions or slurries Dec. 29, 1981
4177053 Method for the production of phosphoric acid with high contents of fertilizer-nutrients Dec. 4, 1979
4175944 Removal of fluorine during production of fertilizer Nov. 27, 1979
4073635 Process for producing a slurry suitable for the manufacture of a mixed fertilizer containing nitrogen plus phosphorus Feb. 14, 1978
4063920 Reducing settling rate of post-precipitate in fertilizer solution by chloride addition Dec. 20, 1977
4043789 Process for manufacturing of phosphoric acid Aug. 23, 1977
4008315 Process for reducing nitrogen oxide losses from certain slurries and solutions by the addition of phosphate salts Feb. 15, 1977
3993466 Fertilizer production Nov. 23, 1976
3967948 Purification of phosphoric acid with urea and nitric acid Jul. 6, 1976

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