Removal of organic matter from crude wet-process phosphoric acid

2007 ◽  
Vol 55 (3) ◽  
pp. 205-208 ◽  
Author(s):  
A. A. Hanna ◽  
A. F. Ali
Keyword(s):  
Organic Matter ◽  
Phosphoric Acid ◽  
Wet Process

scholarly journals Recycling of Spent Reverse Osmosis Membranes for Second Use in the Clarification of Wet-Process Phosphoric Acid

Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 637
Author(s):  
Khaoula Khaless ◽  
Brahim Achiou ◽  
Rachid Boulif ◽  
Rachid Benhida
Keyword(s):  
Organic Matter ◽  
Phosphoric Acid ◽  
Organic Solvent ◽  
Reverse Osmosis ◽  
Acid Treatment ◽  
Suspended Solid ◽  
Reverse Osmosis Membrane ◽  
Wet Process ◽  
Green Separation ◽  
Second Use

Various techniques have been used to “clean-up” wet-process phosphoric acid such as precipitation, flotation and adsorption. To address the potential of membrane processes in the phosphoric acid clarification process, this study explores the benefits of membrane techniques as a green separation technique for phosphoric acid clarification in an eco-efficient way through the use of recycling spent reverse osmosis membrane. Regenerated membrane was used to study the phosphoric acid clarification at a laboratory scale. They were immersed in an oxidizer for at most seven days. The samples were characterized systematically before immersion in an oxidant media. In this study, the potential to regenerate spent membranes and application of this media to clarify the 29% P2O5 phosphoric acid was demonstrated. This study shows, through experiments, that the reverse osmosis (RO) membranes could achieve a rejection of 70% and 61% for suspended solid and organic matter, respectively. These promising results will pave the way for implementation of these membranes in phosphoric acid treatment. Moreover, besides being economically advantageous, the use of the spent membrane is likely an environmentally friendly route (no waste, no organic solvent and effluent to be regenerated later on).

Flame Photometric Determination of Calcium in Wet-Process Phosphoric Acid

1954 ◽  
Vol 26 (6) ◽  
pp. 1060-1061 ◽  
Author(s):  
J. A. Brabson ◽  
W. D. Wilhide
Keyword(s):  
Phosphoric Acid ◽  
Photometric Determination ◽  
Wet Process

Effects of initial concentration and irradiation dose to degradation of di butyl phthalate from phosphoric acid (30 % P2O5)

2018 ◽  
Vol 106 (11) ◽  
pp. 909-916
Author(s):  
Louisa Bounemia ◽  
Abdelhamid Mellah
Keyword(s):  
Organic Matter ◽  
Phosphoric Acid ◽  
Optimal Recovery ◽  
Γ Irradiation ◽  
Γ Radiation ◽  
Initial Concentration ◽  
First Order ◽  
First Order Kinetics ◽  
Butyl Phthalate

Abstract The pretreatment of the phosphoric acid is a stage of utmost importance leading to an optimal recovery of the uranium present in this acid. To this end, the degradation of the organic matter which obstructs considerably this recovery was tested by γ irradiation. This study lies within the scope of the radiation/matter interaction; concerning the use of the γ irradiator as proceed of phosphoric acid purification by the degradation of di butyl phthalate (DBP). Studies of the interaction of γ radiation with phosphoric acid solutions polluted by an organic matter concern the study of the influence of some parameters such as: dose rate (0.5–35 kGy), initial concentration (50–500 mg/L) of the pollutant, pH and % in P2O5 on the degradation of organic matter by γ irradiation. The reactions followed pseudo first order kinetics for different initial concentrations. The results made it possible to say that the degradation of di butyl phthalate by γ irradiation is dependent on the amount of the concentration of DBP and pH. The G-values decreased with absorbed doses, and increased with higher initial concentrations.Purification of phosphoric acid by γ radiation does not degrade the quality of this acid.

scholarly journals Extraction of Nitric Acid from Wet-process Phosphoric Acid

2013 ◽  
Vol 20 (0) ◽  
pp. 183-195 ◽  
Author(s):  
Xuhong JIA ◽  
Jun LI ◽  
Yang JIN ◽  
Jianhong LUO ◽  
Baoming WANG ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Phosphoric Acid ◽  
Wet Process

Water–Phosphorus Nexus for Wet-Process Phosphoric Acid Production

2018 ◽  
Vol 57 (20) ◽  
pp. 6968-6979
Author(s):  
Hang Ma ◽  
Xiao Feng ◽  
Chun Deng
Keyword(s):  
Phosphoric Acid ◽  
Acid Production ◽  
Wet Process

Performance Study of Nonionic Filter Aid on Wet-Process Phosphoric Acid

2013 ◽  
Vol 781-784 ◽  
pp. 560-566
Author(s):  
Jie Xu ◽  
De Jun Fei ◽  
Jian Xun Wu ◽  
Ya Gu Dang
Keyword(s):  
Phosphoric Acid ◽  
Vacuum Filter ◽  
Performance Study ◽  
Application Performance ◽  
Wet Process ◽  
Surface Contact Angle ◽  
Void Area ◽  
Cake Porosity ◽  
Ionic Copolymer ◽  
Filter Aid

A non-ionic copolymer PAMA which has two functions of flocculation and surface activity was synthesized in aqueous solution. The copolymer was also characterized by means of infrared spectroscopic and unclear magnetic. The application performance of PAMA were studied, and the results show that the filtration rate of the phosphoric acid can be increased by about 3.8 times,the water content of the filter cake can be reduced by about 9.8%. Meanwhile, PAMA may increase the cake porosity by 25.82%,increase the mean void area about 7 times ,increase the surface contact angle of phophogypsum by 9.8°and decrease the surface tension by 7.4 mN·m-1 according to the SEM photos and hydrophobic experiment. All this confirms that PAMA is useful for vacuum filter system of wet process phosphoric acid.

scholarly journals Sorption Extraction of Rare Earth Metals from Wet-Process Phosphoric Acid

2021 ◽  
Vol 83 (1) ◽  
pp. 140-152
Author(s):  
Baltabekova Zhazira ◽  
Kenzhaliyev Bagdaulet ◽  
Lokhova Nina ◽  
Kassymzhanov Kaisar
Keyword(s):  
Rare Earth ◽  
Phosphoric Acid ◽  
Treatment Process ◽  
Cation Exchanger ◽  
Rare Earth Metals ◽  
Ion Exchangers ◽  
Technological Parameters ◽  
Complex Composition ◽  
Impurity Composition ◽  
Wet Process

When apatites and phosphorites are processed, up to 30% of rare earth metals are converted into wet-process phosphoric acid. Wet-process phosphoric acid from the phosphorite treatment process differs from apatite one by impurity composition, i.e. the iron content is by 3.5 times, and calcium is by 5.0 times more. The complex composition of the wet-process phosphoric acid from the phosphorite treatment process requires additional researches to select optimal ion exchangers and technological parameters of sorption. Various aspects of sorption have been studied to select the optimal ion exchangers and technological parameters, and technological modes for desorption of rare earth metals from a cation exchanger to obtain a concentrate of rare earth metals have been completed. The method enables to extract rare earth metals without changing the composition of commercial wet-process phosphoric acid directly in the production process of the enterprises engaged in the phosphorite treatment process.

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