Kinetics of Acid-Catalyzed Hydrolysis of a Polyphosphate in Water

Jager, Henk-Jan de; Heyns, A.M.

doi:10.1021/jp9730252

Cited by 39 publications

(40 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was found that P3 is the preferred intermediate hydrolysis product rather than P1, contrary to the hydrolysis mechanism proposed before 81. …”

contrasting

confidence: 82%

Catalysis in the Upgrading of Fischer–Tropsch Syncrude

2010

Catalysis in the Refining of Fischer-Tropsch Syncrude

View full text Add to dashboard Cite

The catalysis of conversion technologies that are found in most commercial Fischer–Tropsch upgrading and refining facilities are discussed. Four main classes of catalysis are considered, namely a) alkene oligomerisation, b) isomerisation and hydroisomerisation of alkanes and alkenes, c) cracking and hydrocracking, and d) hydrotreating. The focus is on catalysis, with aspects such as oxygenates, oxygenate related deactivation, commercial processes and Fischer–Tropsch application specifics being highlighted.

show abstract

“…It was found that P3 is the preferred intermediate hydrolysis product rather than P1, contrary to the hydrolysis mechanism proposed before 81. …”

contrasting

confidence: 82%

Catalysis in the Upgrading of Fischer–Tropsch Syncrude

2010

Catalysis in the Refining of Fischer-Tropsch Syncrude

View full text Add to dashboard Cite

show abstract

“…Under low collision-energy conditions, the spectrum displayed the fragment at m/z 159, HP 2 O 6 À , corresponding to the loss of a water molecule. At slightly higher collision energies, it displayed the ion at m/z 79, PO 3 À , corresponding to the loss of H 3 PO 4 .…”

Section: Resultsmentioning

confidence: 99%

“…(3)] considering that the enthalpy change of the hydrolysis reaction (vide infra) was computed to be endothermic by nearly 23 kcal mol These results suggest that H 3 P 2 O 7 À ions investigated by TQ/MS have the structure of the linear pyrophosphate anion I, the only structure which is consistent with the highenergy loss of the H 2 PO 4 À fragment. Furthermore, the appearance of both the ions at m/z 159 and m/z 79 at comparable energy thresholds allows the presence of the [HP 2 O 6 …”

Section: Discussionmentioning

confidence: 99%

The Diphosphate Monoanion in the Gas Phase: A Joint Mass Spectrometric and Theoretical Study

Ricci

Pepi

Stefano

et al. 2004

Chemistry A European J

View full text Add to dashboard Cite

H(3)P(2)O(7) (-) ions were obtained in an electrospray ion source of a Fourier transform ion cyclotron resonance (ESI/FTICR) mass spectrometer from a CH(3)CN/H(2)O (1:1) pyrophosphoric acid solution and in the ionic source of a triple quadrupole (TQ) mass spectrometer from the chemical ionisation (CI) of pyrophosphoric acid introduced by a thermostatically controlled direct insertion probe. The ions were structurally characterised by mass spectrometric techniques and theoretical calculations. Consistent with collisionally activated dissociation (CAD) mass spectrometric results, theoretical calculations identified the linear diphosphate anion (I) as the most stable isomer on the H(3)P(2)O(7) (-) potential energy surface. The joint application of mass spectrometric techniques and theoretical methods provided information on the dissociative processes of diphosphate anions in the gas phase. Finally, this study provides an insight into the structures and stabilities of the [H(3)PO(4).PO(3)](-), [HP(2)O(6).H(2)O](-) and [H(2)PO(4).HPO(3)](-) clusters and allows the stability and structure of the dimetaphosphate anion, HP(2)O(6) (-), to be investigated at the B3LYP6-31+G* and CCSD(T) levels of theory.

show abstract

“…Temperature is a vital factor influencing polyphosphate hydrolysis because high temperature increases the amount of activated molecules in enzyme‐catalysed biological reactions (De Jager & Heyns, ). Wang et al.…”

Section: Discussionmentioning

confidence: 99%

“…Temperature is a vital factor influencing polyphosphate hydrolysis because high temperature increases the amount of activated molecules in enzyme-catalysed biological reactions (De Jager & Heyns, 1998). Wang et al (2015) reported that the time needed for the complete hydrolysis of pyrophosphate was within 4 days at 35°C and within 6 days at 30°C conditions; in contrast, only 84%-95% of the pyrophosphate was hydrolysed after 10 days at 20°C and 25°C.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the hydrolysis characteristics of three polyphosphates and their effects on soil phosphorus and micronutrient availability

Wang

Gao

et al. 2019

Soil Use and Management

View full text Add to dashboard Cite

Polyphosphate is an alternative phosphorus (P) source which can substitute for orthophosphate‐based P fertilizers in agriculture. In order to explore the effects of polyphosphate addition on soil P availability, and how pH and temperature affect polyphosphate hydrolysis, an aqueous and a soil incubation experiment were conducted at different pHs (5.0 and 8.2) and temperatures (15, 25 and 35°C); the influence of polyphosphate addition on soil available micronutrients (i.e., iron—Fe, manganese—Mn and zinc—Zn) was also studied. The experiments used three different polyphosphate fertilizers (solid and liquid ammonium polyphosphate and polyphosphoric acid) and two soil types (acid and alkaline). In aqueous incubation conditions, the average amount of phosphate (PO43−) released from polyphosphate fertilizers at 35°C was 2.7 times greater than at 25°C. The average Olsen P in polyphosphate‐treated soil at 35°C was 1.12 times greater than at 25°C, indicating that higher temperature facilitates polyphosphate hydrolysis. Polyphosphate hydrolysis increased as the pH decreased in aqueous solution, but its hydrolysis rate was greater in calcareous soil than in acid soil. Moreover, polyphosphate significantly increased soil available Fe, Mn and Zn concentrations by an average of 14%, 16% and 20%, respectively, relative to orthophosphate fertilizer. In summary, high temperature and low pH favour the hydrolysis of short‐chain polyphosphate (aqueous incubation experiment), and polyphosphate significantly increases soil P availability and mobilizes soil micronutrients. The application of polyphosphate can be recommended as a pragmatic P management strategy in agriculture: however, soil temperature and pH should be taken into account when using polyphosphate fertilizers.

show abstract

Kinetics of Acid-Catalyzed Hydrolysis of a Polyphosphate in Water

Cited by 39 publications

References 6 publications

Catalysis in the Upgrading of Fischer–Tropsch Syncrude

Catalysis in the Upgrading of Fischer–Tropsch Syncrude

The Diphosphate Monoanion in the Gas Phase: A Joint Mass Spectrometric and Theoretical Study

Comparison of the hydrolysis characteristics of three polyphosphates and their effects on soil phosphorus and micronutrient availability

Contact Info

Product

Resources

About