Nitric acid acidulation of phosphate rock and pyrolysis of acidulate to produce phosphatic and nitrogen fertilizers

1992 ◽  
Vol 32 (2) ◽  
pp. 239-248 ◽  
Author(s):  
Jack M. Sullivan ◽  
John H. Grinstead ◽  
John J. Kohler
Keyword(s):  
Nitric Acid ◽  
Phosphate Rock ◽  
Nitrogen Fertilizers

scholarly journals (106)Studies on Fertilizers of Phosphate Rock-Urea-Nitric Acid System

1951 ◽  
Vol 54 (3) ◽  
pp. 210-213
Author(s):  
Shoichiro Nagai ◽  
Takafumi Kanazawa ◽  
Koji Saito
Keyword(s):  
Nitric Acid ◽  
Phosphate Rock ◽  
Acid System

scholarly journals Study of The Physicochemical and Commercial Properties of NPK Fertilizers

2021 ◽  
Vol 13 ◽  
Author(s):  
Tursunov Shahboz ◽  
Panjiev Olimjon
Keyword(s):  
Nitric Acid ◽  
Moisture Content ◽  
Acid Content ◽  
Phosphate Rock ◽  
Initial Moisture Content ◽  
Npk Fertilizers ◽  
Nitric Acid Content

Kyzylkum phosphate rock was studied with a nitric acid content of 50 and 75 and 100%, as well as in fertilizers obtained from the ratio of R2O5: K2O = 1:1. The gyroscopic points of the fertilizer size of 2-3 mm were determined at 250 ° C by the desiccator method of N.Ye. Pestov. The points of hygroscopicity of fertilizer samples with an initial moisture content of 1.0% were No. 1 - 46.5%, No. 2 - 38.0% and No. 3 - 32.4%.

Nitric Phosphates from Phosphate Rock, Nitric Acid, Ammonia, and Carbon Dioxide

1953 ◽  
Vol 1 (17) ◽  
pp. 1050-1054 ◽  
Author(s):  
F. T. Nielsson ◽  
L. D. Yates ◽  
L. F. Roy ◽  
F. G. Heil
Keyword(s):  
Carbon Dioxide ◽  
Nitric Acid ◽  
Phosphate Rock

scholarly journals DELIGNIFICATION AND PHYSICOCHEMICAL CHARACTERISTICS OF NON-WOOD BIOMASS

2020 ◽  
pp. 17-24
Author(s):  
Dmitriy Aleksandrovich Yelatontsev ◽  
Elena Vladimirovna Ivanyuk
Keyword(s):  
Nitric Acid ◽  
Specific Surface ◽  
Iodine Number ◽  
Surface Area ◽  
Specific Surface Area ◽  
Raw Materials ◽  
Juglans Regia ◽  
Prunus Armeniaca ◽  
Nitrogen Fertilizers ◽  
Walnut Shell

The paper presents the of influence peroxide ammonium, alkali, nitric acid, organosolvent and "aqueous ammonia soaking" (AAS) delignification methods on the degree of removal of lignin from non-wood lignocellulosic waste walnut shell Juglans Regia L. and apricot seed Prunus Armeniaca L. It is shown that the maximum degree of delignification (94%) is achieved when processing raw materials with 42 wt% HNO3 and 20 wt% NaOH; the minimum is at peroxide-ammonia treatment (80%). We found that the greatest specific surface area (202 m2∙g-1) provided by the application 42 wt% HNO3, and a maximum iodine number (32 mg∙g-1) when using 25 wt% NH4OH. Delignification significantly increases the specific surface area (5 m2∙g-1 to 120–200 m2∙g-1) iodine number (6.35 mg∙g-1 to 25 to 32 mg∙g-1) of biomass, however, at 45–55% reduced exchange capacity of the material. The obtained cellulose intermediates having acceptable physical and chemical characteristics can be used for further preparation of available sorbents or ion exchange materials. In accordance with the principles of "green chemistry", it is proposed to dispose the spent delignification solutions from AAS and nitric acid methods in liquid nitrogen fertilizers producing.

scholarly journals (306-307)Synthetic Fertilizers of Phosphate Rock-Urea-Nitric Acid System.III-IV

1951 ◽  
Vol 54 (10) ◽  
pp. 611-615
Author(s):  
Shoichiro Nagai ◽  
Takafumi Kanazawa ◽  
Kazuo Sakurada
Keyword(s):  
Nitric Acid ◽  
Phosphate Rock ◽  
Synthetic Fertilizers
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