Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userPreciptation of vanadates from their water solutions using different protonated amine compounds
ترسيب الفانادات من محاليلها المائية باستخدام مركبات أمينية مختلفة مبرتنة
1132
1 1
0.0
(
0
)
Added by
Tishreen University ورقة بحثية
Publication date
2018
fields
Chemistry
and research's language is
العربية
Created by
Shamra Editor
Ask ChatGPT about the research
اسُتخدمت العديد من المركبات الكيميائية ( أسس , حموض لاعضوية , أملاح ) لإيجاد مذيب مناسب لأوكسيد الفاناديوم ((V2O5 و تعيين الشروط المثلى لإذابته فكان أفضلها هيدروكسيد الصوديوم (NaOH) بتركيز ((2M كانت الاذابة (100%) عند درجة الحرارة (90) مئوية و زمن الاذابة (30) دقيقة و عدد دورات المحرك المغناطيسي (800) دورة/ دقيقة و نسبة صلب/سائل (200) غ/ل . كما استخدمت مركبات أمينية مبرتنة لترسيب الفانادات من محاليلها أحادي ايتانول امين ((C2H5ONH2 , ثنائي فنيل أمين (C6H5)2NH ، الهيدرازين (N2H4 )، هدروكسيد أمين هدروكلورايد (NH2OH.HCℓ) ، اليوريا N2H4CO)) ، و قد برتينت بعدة حموض لاعضوية مركزة (HCℓ ، H2SO4 ،HNO3 ) و بنسبة 1:1 حمض للأساس فكان المركب الأميني الأمثل لترسيب الفانادات احادي ايتانول أمين المبرتن بحمض الكبريت المركز.
Many chemical compounds (bases, inorganic acids, salts) have been used to find a suitable solvent for vanadium oxide And determine optimal conditions for its Dissolution.The best of them was sodium hydroxide at 2M concentration. The solubility was 100% at 90 °C and the solubilitys time was 30 min. The number of motor cycles was 800 cycles / min and the liquid / solid ratio was 200 g / L. In addition,the best amino protonadted compounds were used to precipitate vanadates from their solutions (monoethanolamine, diphenylamine, hydrazine, hydroxide amine hydrochloride, urea) with several inorganic acids (HCl, H2SO4, HNO3) and 1: 1 acid/base was monoethanolamine protonated with concentrated sulfur acid .
References used
SUGITA,I. HIROYUKI,O.Solvent extraction research and development , Japan.vol.24,no 2, (2017)61-69
VITOLO, M. SEGGIANI ,S. FILIPI, C. Recovery of vanadium from heavy oil Orimulsion fly ashes, Hydrometallurgy 57 (2000) 141-149
AKITA, T. MAEDA, H. TAKEUCHI,S. Recovery of vanadium and nickel in fly ash from heavy oil, J. Chem. Technol. Biotechnol. 62 (1995)345–350
rate research
Read More
This search aims to study the adsorption of Cu ions from their solutions
on the surface of silicon oxide.
These experiments were in five groups, at the first three groups the
amount of the adsorbent was constant, and the concentration of the
adso
rbing ions was changed, after the adsorption is ended the
concentration of Cu remaining ions in the solution was measured, then
the quantities of the adsorbing ions on the surface of silicon oxide were
determined.
Syrian natural zeolit was used to study the adsorption of phenol from aqueous
solutions. Batch method was used to study the adsorption process.
The results showed that the adsorption process accurs rabidly at the first time and the
equilibrium ach
ieved after 120min .
The adsorption process performed in the rang of PH (3-10). The adsorption of phenol
increased by increasing of PH value up to(6-7) and then decreased.
The temperature affect the adsorption process and the results showed that the
increasing of the temperature leads to decreasing of the adsorption of phenol.The
maximum adsorption amount of phenol was 8 mg/g at 25C0 when the initial concentration
of phenol was 60mg/l.
Adsorption amount of phenol increased when the adsorbent dosage increased up to
0.3g of zeolite.
The resulted data of the adsorption isotherm were fitted with Langmuire model and
the monomolecular layer adsorption formed on the surdace of the adsorbent.
In this work the process of removal of zinc ions from aqueous solutions was studied using natural Syrian zeolite. Two samples were used: natural zeolite Z and modified zeolite with NaCl solution Z-Na. The removal percentage of zinc ions vs. time was
determined using differential initial concentrations of Zn+2: 50,100,200,300,400 mg/L. The contact time was determined and it was 360 min. The removal of Zn+2 ions as a function of temperature and pH have been studied. It was found the increasing of removal percentage by increasing temperature and increasing when pH increasing up to ~7,then the precipitation of zinc hydroxide accurse. The Langmuire adsorption isotherm equation used to calculate the maximum sorption capacity and it was 21.7 and 28.5 mg/g for Z and Z-Na respectively. Results indicate a significant potential for the natural and modified zeolite as an adsorbent/ion-exchange materials for heavy metal removal.
Organosulfur compounds have been exploited to reverse the reactivity of carbonyl
compounds. The heteroatom produces a reactivity pattern in a carbon skeleton. Its
electronegativity, being greater than that of carbon (-I effect) and its ability to s
tabilize an
adjacent positive charge (+M effect) makes the sites susceptible to be attacked by reagents
possessing a given “philicity”.
Nucleophiles attacks the odd C atomes (
1,3,5... C attack) whereas electrophiles attacks the
even C atomes (
2,4,6... C attack) of the carbonyl compounds. If the reactivity of a carbonyl
could be reversed, the acyl carbon would become nucleophilic, and if this transformation
can be accomplished, the carbonyl should be regenerated. Seebach termed this process
''umpolung''.
The Syrian natural zeolite from om'ozon area has been studied as adsorbent for Ni(II) ions from aqueous solution. The removal of Ni(II) ions under different conditions was studied adsorption of Ni(II) enhanced with an increase of initial concentratio
n, temperature and PH .all experiments were carried out at contact time 6h.
The amount of Ni(II) adsorption was increased from 16.36 mgNi/g for initial solution concentration of 100mg Ni/l to 71.33 mgNi/g (for C0=1000mgNi/L). The experimental data fitted well to Langmuir isotherm. The maximum capacity was qmax=142.85mgNi/g Adsorption amount at 298K varies from 16.36mgNi/g for initial solution concentration of 100mg Ni/l to 47.93mg Ni/g(for C0=400mgNi/L) and it increases at 333K to 16.65 mgNi/g and 51mgNi/g (for C0=100 and 400 mg Ni/L )respectively. The adsorption of Ni(II) ions was increased by increasing PH up to ~ 5 and then stabilized up to PH=6 and after that the precipitation process was accured.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
