elemental phosphorus
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2022 ◽  
Author(s):  
Mehdi Hatami ◽  
Nima Rahnama ◽  
Hassan Karimi-Maleh ◽  
Nader Djafarzadeh ◽  
Mohammad Qandalee ◽  
...  

Abstract In this research, a new generation of ternary nanocomposites based on poly(ethylene terephthalate) (PET), phosphorylated chitosan and surface modified alumina nanoparticles were fabricated in four steps. The phosphorylation process was targeted for the insertion of elemental phosphorus as a flame retardant agent in the final PET nanocomposite. Likewise, environmentally friendly nano-alumina was used for PET matrix to improve the flame retardant properties of PET in collaboration with elemental phosphorus. Alternatively, the presence of alumina nanoparticles in combination with phosphorylated chitosan improved the antibacterial activity of the PET matrix. Furthermore, the effects of the phosphorylated chitosan and alumina nanoparticles on the morphology and thermal properties of nanocomposites were inspected by different approaches. The structure and distribution of the nanoscale particles in PET were analyzed by scanning electron microscopy. In addition, differential scanning calorimetry and thermogravimetric analyses were used for the in-depth evaluation of the thermal properties of prepared nanocomposites.


2021 ◽  
Author(s):  
Riccardo Dettori ◽  
Nir Goldman

The meteoritic mineral schreibersite, e.g., Fe3P, is a proposed abiotic source of phosphorus for phosphate ion (PO4-) production, needed for nucleobases, phospholipids, and other life building materials. Schreibersite could have acted as both a source of elemental phosphorus and as a catalyst, and the hostile conditions on early Earth could have accelerated its degradation in different environments. Here, we present results from quantum calculations of bulk schreibersite and of its low Miller index surfaces. We also investigate water surface adsorption and identify possible dissociation pathways on the most stable facet. Our calculations provide useful chemical insights into schreibersite interactions in aqueous environments, paving the way for further detailed investigation on more reactive surfaces. Our results help provide a ``bottom-up'' understanding for phosphorylated organic synthesis on the primitive planet and its role in producing life building molecules.


2021 ◽  
Vol 24 (3) ◽  
pp. 38-44
Author(s):  
Anar K. Zhumadilova ◽  
Elmira B. Madaliyeva ◽  
Saule Z. Zhigitova

The present study analyses the composition and main components of toxic dust. To develop and understand the methods of controlling the dust generation process, it is necessary to study the data that provide detailed information about the reaction mechanism. The results of studies of the phase composition of dust conducted in the laboratory and their comparison with the data obtained earlier by other authors allowed establishing a fairly reliable diagnosis of the phase composition of dust. The analysis revealed that the dust of various phosphorus plants comprises the same basic components, yet the chemical bonds between them differ. The purpose of this study, conducted in the research laboratory of the Zhambyl Branch of LLP “Kazphosphate” (NDFZ) is to investigate the possibility of using new toxic dust, as well as the toxic dust from storage tanks to obtain NPK fertilisers. The study comprises three stages of investigating the oxidation of elementary phosphorus with nitric acid, since elementary yellow phosphorus is dangerous for the environment. As a result of the 1st stage of the study, it was found that toxic dust oxidised with nitric acid cannot be used as a fertiliser, since a non-technological mass is generated, such as acid resin, which is not suitable for drying and granulation. To neutralise the acid reaction mass, it was decided to use an aqueous solution of ammonia, thereby increasing the nutrient content and obtaining a complex NPK fertiliser. In the course of the study, the authors found in the 2nd and 3nd stages of the experiment that to obtain a productsuitable for fertilisation, it is necessary to strictly control the content of elemental phosphorus in the initial toxic dust and adjust the consumption of nitric acid based on its results


2021 ◽  
Vol 441 ◽  
pp. 213927
Author(s):  
Leonardo Giusti ◽  
Vanessa R. Landaeta ◽  
Matteo Vanni ◽  
John A. Kelly ◽  
Robert Wolf ◽  
...  

2021 ◽  
Vol 70 (7) ◽  
pp. 1260-1268
Author(s):  
A. A. Zagidullin ◽  
A. V. Petrov ◽  
I. A. Bezkishko ◽  
V. A. Miluykov

2021 ◽  
Vol 25 ◽  
Author(s):  
Vadim D. Romanenko

: This article provides reviews related to some innovative (“non-classical”) synthetic strategies for the formation of CP bonds developed during the last decades. It provides examples of the most important milestones in this field, highlighting the state-of-art of functional phosphorus-containing molecules. Among these are the direct functionalization of organic substrates through chlorine-free reactions with elemental phosphorus, syntheses based on phosphinidene (RP) transfer, phosphorylating methodology employing multiple bonds containing P(III) compounds, reactions with stable heterocyclic carbenes, and synthetic approaches using phosphaethynolate and bis(trichlorosilyl)phosphide salts.


2021 ◽  
Author(s):  
Marion Till ◽  
Verena Streitferdt ◽  
Daniel J Scott ◽  
Michael Mende ◽  
Ruth M Gschwind ◽  
...  

Chlorobenzenes are important starting materials for the preparation of commercially valuable triarylphosphines and tetraarylphosphonium salts, but their use for the direct arylation of elemental phosphorus has been elusive. Here we...


2021 ◽  
Vol 25 (1) ◽  
pp. 894-906
Author(s):  
Aray Abildayeva ◽  
Khalima Turgumbayeva ◽  
Dagnija Blumberga

Abstract The production of elemental phosphorus is a material- and energy-intensive process, which makes it important to improve the technology in order to maximize savings of raw materials and electricity. At the enterprises of the phosphorus industry of Karatau-Zhambyl TIC (territorial-industrial complex) there is an incomplete use of production capacity, which is due both to organizational reasons, and largely due to the properties of commercial phosphorites of the Karatau basin. The decisive factor is the use of mine phosphate rock fines and waste from Karatau-Zhambyl TIC and phosphate plants, previously sent to the dumps. The system approach to the study of interaction of the chemical enterprise with the environment allowed to present mineral flows in the system, accumulation and transformation of matter in the constituent blocks-systems in a new way, to offer a new methodological approach to the system management based on the analysis of its information content; to reveal contradictions in research, design and management processes of ‘Chemical enterprise-environment’ system (ChE-E).


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