The crystal structure of an aluminum-based borohydride ammoniate – Al(BH4)3·6NH3 – is reported for the first time. The molecular structure of Al(BH4)3·6NH3 is resolved by high-resolution X-ray diffraction. The compound crystallized in the space group Pbcn (No. 60), with lattice parameters of...

The 1:1 and 1:2 adducts of aluminum borohydride (Al(BH4)3) and the Lewis base triethylenediamine (TEDA) and their thermal decomposition products were synthesized and structurally characterized by Raman spectroscopy, X-ray diffraction, and thermogravimetric analysis. Both adducts are more stable ...

Hydrogen generation by means of the combustion of aluminum powder with sodium borohydride (NaBH4) addition in steam was studied by a pipe furnace at different temperatures. The ignition temperature and the maximum combustion temperature were obtained by an S-type thermocouple. Ignition delay tim...

Sodium borohydride (NaBH4) is considered to be an excellent hydrogen-generation material via hydrolysis. However, it remains challenge to regenerate it after hydrolysis in practical applications. Therefore, a low-cost regeneration method from hydrolysis by-products for recycling is the key issue...

The properties of fluoride in wet phosphoric acid processes were of interest us to understand the processes and roles that fluorosilicic acid plays in phosphoric acid solutions. The literature data indicate that some deficiencies exist in the thermodynamic properties of hexafluorosilicic acid aq...

Interaction of hexafluorosilicic acid with sulfa drugs sulfathiazole (stz) and sulfalen (2-sulfanilamido-3-methoxypyrazine, sl) results in the crystalline salts of the compositions [stzH]2[SiF6] (I) and [4-H2NO2SPhNH3]2[SiF6] (II). Complex I is characterized by IR, mass spectrometry data and sin...

In this article we report recovery of mesoporous silica from the waste material (hexafluorosilicic acid) of phosphate fertilizer industry. The process involves the reaction of hexafluorosilicic acid (50 ml, 24 wt% H2SiF6) and 100 ml, 0.297 M Na2CO3 to generate the alkaline aqueous slurry. Silica...

The industrial by-product hexafluorosilicic acid was investigated as silicate source for titanium containing MCM-41 (Si/Ti–MCM-41) synthesis. An extended and detailed study, which includes the effects of several factors such as the state and content of Ti, surfactant/Si ratio and template remov...

A new effective process to improve the utilization of industrial fluorosilicic acid of phosphate fertilizer by-product has been investigated to comprehensive application of the silicon and fluorine source. Two-step ammoniation was applied to recover high-quality silica. The recovered silica can ...

Phosphogypsum is the principal by-product produced by the wet processes involved in the manufacture of phosphoric acid, and generally contains an amount of fluoride that needs to be fixed or removed. Calcium hydrogen phosphate dihydrate (DCPD) reacts with fluoride ions in solution to form fluora...

The oxidation of oxalic acid by tetrachloroaurate(III) ion in 0.005 ⩽ [HClO4] ⩽ 0.5 mol dm−3 is first order in [AuCl4-] and a fractional order in [oxalic acid], the reactive entities being AuCl3(OH)− and HC2O4- ions. The pseudo first-order rate, kobs, with respect to [Au(III)], is retarded by in...

The proton spin—lattice relaxation time T1 at the two frequencies of 20 and 60 MHz and the second moment of proton magnetic resonance were determined for methyl-ammonium hexachloroplatinate(IV), its partially deuterated derivatives, and methylammonium hexachlorostannate(IV) at various temperatu...

The quadrupole resonance of halogens in potassium hexachlorostannate(IV), potassium hexabromostannate(IV), ammonium hexachlorostannate(IV), ammonium(d4) hexachlorostannate(IV), and ammonium hexabromostannate(IV) was observed over a wide range of temperature, and transition points were located. T...

The heat capacity of deuterated ammonium hexachlorostannate (ND4)2SnCl6 was measured from 5.9 to 347 K by adiabatic calorimetry. The heat capacity is characterized by a λ-shaped anomaly that reaches its maximum Cp,m ≈ 53·R (R = 8.31451 J·K−1·mol−1) at approximately 244 K. The value of ΔSmo...

Combined experimental (X-ray, IR and Raman) and theoretical (periodic DFT/PAW-PW91) studies have been performed for thorough understanding of the structure, hydrogen bonding and vibrational properties for three alkylenediammonium hexachlorostannates with the general formula: [NH3(CH2)nNH3]SnCl6 ...

A series of novel phenylglycinamides as retinoic acid receptor-related orphan receptor-gamma t (RORγt) inverse agonists were discovered through optimization of a high-throughput screen hit 1. (R)-N-(2-((3,5-Difluoro-4-(trimethylsilyl)phenyl) amino)-1-(4-methoxyphenyl)-2-oxoethyl)-3-hydroxy-N-me...

CYP24A1 (25-hydroxyvitamin D-24-hydroxylase) is a useful enzyme target for a range of medical conditions including cancer, cardiovascular and autoimmune disease, which show elevated CYP24A1 levels and corresponding reduction of calcitriol (the biologically active form of vitamin D). A series of ...

A large part of oceanic biological production is limited by the scarcity of dissolved iron. Mineral dust aerosol, processed under acidic atmospheric conditions, is the primary natural source of bioavailable iron to oceanic life. However, synergistic and antagonistic effects of non-Fe-containing ...

Treatment of wastewater containing co-contaminants poses a significant challenge because heavy metal and inorganic anion contaminants in wastewater have different fates and transport mechanisms. In this paper, bimetallic Fe/Ni nanoparticles supported by kaolinite (K-Fe/Ni) were used to simultane...

Supported nano-scale zero-valent (nZVI) iron is a suitable material for groundwater and wastewater treatment applications. It can prevent the agglomeration of nanoparticles and increase their hydraulic conductivity. However, these supported nZVI particles suffer corrosion and greater pore diffus...