Coagulation Effects of Aluminum Nitrate and Aluminum Sulfate on Aqueous Sols of Silver Halides in Statu Nascendi. Detection of Polynuclear Complex Aluminum Ions by Means of Coagulation Measurements

1953 ◽  
Vol 57 (9) ◽  
pp. 951-954 ◽  
Author(s):  
E. Matijevic ◽  
B. Tezak
Keyword(s):  
Aluminum Sulfate ◽  
Polynuclear Complex ◽  
Aluminum Nitrate ◽  
Silver Halides ◽  
Complex Aluminum ◽  
Aluminum Ions

scholarly journals Preparation and Mechanism of a New Enhanced Flocculant Based on Bentonite for Drinking Water

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Feng-shan Zhou ◽  
Jie Li ◽  
Lin Zhou ◽  
Yang Liu
Keyword(s):  
Drinking Water ◽  
Ferrous Sulfate ◽  
Metal Ion ◽  
Aluminum Sulfate ◽  
Removal Rate ◽  
Metal Ion Removal ◽  
Drinking Water Standard ◽  
Aluminum Ions ◽  
Heavy Metal Ion Removal ◽  
Base Composite

Bentonite is characterized by the large specific surface, good adsorption, ion exchange ability, and nontoxicity. An enhanced bentonite base composite flocculant (BTA) can be prepared from treating the calcium base bentonite and compositing various functional additives. Bentonite was firstly treated by citric acid, then the talc and activated carbon turned to be acid part and simultaneously the part that was treated by sodium bicarbonate and calcium hydroxide turned to be alkaline part, and finally the acid bentonite part and alkaline bentonite part were mixed up with preground powder of polymeric chloride aluminium (PAC), cationic polyacrylamide (CPAM), ferrous sulfate, and aluminum sulfate, and after all of the processing flocculant BTA was obtained. The optimum preparation process of flocculant BTA has shown 29.5% acid bentonite part, 29.5% alkaline bentonite part, 15% PAC, 1% CPAM, 5% ferrous sulfate, and 20% aluminum sulfate. BTA was used to treat drinking water with high turbidity and metal ion in Karamay City, Xinjiang. The treated water was surely up to the drinking water standard of China in decolorization rate, deodorization rate, heavy metal ion removal rate, and so forth, and contents of residual aluminum ions and acrylamide monomer in drinking water were considerably decreased.

scholarly journals Synthesis of ZSM-23 Zeolite by Two-Stage Temperature-Varied Crystallization and Its Isomerization Performance

2020 ◽  
Vol 10 (21) ◽  
pp. 7546
Author(s):  
Xiaoyan Chen ◽  
Hongjuan Xi ◽  
Congbiao Chen ◽  
Zhongyi Ma ◽  
Bo Hou
Keyword(s):  
Hydrothermal Synthesis ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Aluminum Sulfate ◽  
The Body ◽  
Aluminum Nitrate ◽  
Two Stage ◽  
Long Chain

Several ZSM-23 zeolites with different acid distributions are synthesized by two-stage temperature-varied crystallization and changing the species of aluminum source via conventional hydrothermal synthesis. The crystallinity, micropores, external specific surface area and the Si/Al ratios are measured by XRD, BET, ICP and XPS, indicating that both the body phase and the surface of the zeolite synthesized by two-stage temperature-varied crystallization have higher Si/Al ratio, and the zeolite synthesized with aluminum nitrate as the aluminum source exhibit the largest specific surface area. The properties of acidity and Pt obtained by NH3-TPD, TEM, Py-IR and H2-TPR show that the suitable B-acid distribution leads to high Pt dispersion over the zeolite. Applying these catalysts to the isomerization of n-dodecane, the zeolite synthesized with aluminum sulfate as aluminum source by two-step temperature-varied crystallization shows the best isomerization performance, that the selectivity of i-dodecane reaches 81.2% at 90.7% conversion. Therefore, the matching of acidity, external specific surface area and Pt dispersion of the zeolites is the key to improve the isomerization performance of long-chain alkanes.

Porous alumina ceramics by spray-pyrolyzed powder from aluminum sulfate and aluminum nitrate solutions

1994 ◽  
Vol 9 (7) ◽  
pp. 1709-1713 ◽  
Author(s):  
Kiyoshi Okada ◽  
Akihiro Tanaka ◽  
Shigeo Hayashi ◽  
Keiji Daimon ◽  
Nozomu Otsuka
Keyword(s):  
Pore Size ◽  
Aluminum Sulfate ◽  
Pore Radius ◽  
Nitrate Solution ◽  
Sulfate Solution ◽  
Aluminum Nitrate ◽  
Alumina Ceramics ◽  
Average Pore ◽  
Average Pore Radius ◽  
Nitrate Solutions

Porous α-alumina ceramics were prepared using the spray-pyrolyzed powder from aluminum nitrate solution and aluminum sulfate solution. Porosity and pore size distribution of the samples were examined with respect to the forming pressure and firing temperature. The porosity obtained changed from around 80% in the green compacts to 60–70% in the fired bodies fired at 1500 °C. The porosity of 30–40% remained even by firing at 1700 °C. Although there was no significant difference in the porosity of the fired bodies prepared from the sulfate and nitrate solutions, the fired bodies prepared from the nitrate solution showed apparently larger pore size than those from the sulfate solution. Fired bodies with an average pore radius from 0.2 to 0.8 μm can be prepared by this method. The four-point bending strength of the fired bodies, which had a porosity of 57% and an average pore radius of 0.23 μm, was 35 MPa.

scholarly journals Effect of Aluminum Sulfate and Succinic Acid on the Growth Law of α-Calcium Sulfate Hemihydrate under Microwave Irradiation

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Yan Feng ◽  
Rongxin Guo ◽  
Zhiwei Lin
Keyword(s):  
Microwave Irradiation ◽  
Succinic Acid ◽  
Calcium Sulfate ◽  
Aluminum Sulfate ◽  
Average Length ◽  
Diameter Ratio ◽  
Transformation Rate ◽  
Crystal Transformation ◽  
Aluminum Ions ◽  
Calcium Sulfate Hemihydrate

The existing α-hemihydrate gypsum preparation process has low production efficiency and high energy consumption. In this paper, α-type hemihydrate gypsum was prepared by microwave irradiation using phosphogypsum as the raw material, calcium chloride solution as the reaction medium, and succinic acid and aluminum sulfate as crystal-transforming agents. Both aluminum sulfate and succinic acid were studied to determine the mechanism influencing the effect on the growth of α-type hemihydrate gypsum crystals. This study found that, without added succinic acid or aluminum ions, the crystal transformation rate of α-calcium sulfate hemihydrate reached 96% with the average length-diameter ratio reaching 21 after 1 h; when the dosage of succinic acid was 0.02%, the crystal transformation rate of α-calcium sulfate hemihydrate reached 96% with the average length-diameter ratio reaching 1.5 after 1.5 h; and when the aluminum ion dosage was 5 mM, the crystal transformation rate of α-calcium sulfate hemihydrate reached 97% with the average length-diameter ratio reaching 12.3 after 1 h. In addition, it was discovered that the reaction time was significantly shortened under microwave irradiation, and with an increase in succinic acid content, the regulation of the microscopic morphology of the calcium sulfate hemihydrate crystals was continuously enhanced and the aspect ratio of the crystals was continuously reduced. The EDS and Fourier transform infrared spectroscopy (FTIR) analysis showed that succinic acid did not adsorb onto the hemihydrate gypsum crystal during the reaction under microwave irradiation. The X-ray photoelectron spectroscopy (XPS) analysis revealed that aluminum ions affected crystal growth by incorporating into calcium sulfate hemihydrate crystals after reacting with sulfate radicals.

HYDROLYTIC REACTIONS AND PROPERTIES OF DILUTE ALUMINUM SALT SOLUTIONS

1982 ◽  
Vol 62 (4) ◽  
pp. 559-569 ◽  
Author(s):  
S. SHAH SINGH
Keyword(s):  
Infrared Spectra ◽  
Aluminum Chloride ◽  
Aluminum Sulfate ◽  
Aluminum Nitrate ◽  
Aluminum Salt ◽  
Salt Solutions ◽  
Subtraction Technique ◽  
Dilute Solutions ◽  
Average Composition ◽  
Hydrolysis Of

Experiments were done to characterize the hydrolyzed solutions of aluminum nitrate, aluminum chloride and aluminum sulfate. The hydrolysis of the dilute solutions (10−3M) was accomplished under reflux process at 92 °C. The results showed that anions associated with Al have an effect on hydrolysis of aluminum and the order of ease of hydrolysis for similar concentrations of Al was NO3 > Cl > SO4. The average composition of the hydroxyaluminum cation (Aln(OH)m) was calculated as [Formula: see text] and [Formula: see text] for hydrolyzed solutions of Al(NO3)3, AlCl3, and Al2(SO4)3, respectively. The infrared spectra of the hydrolyzed species of aluminum were obtained by a subtraction technique and infrared peaks at 1410 cm−1 and 1085 cm−1 in the AlCl3 system and at 1435 cm−1 and 1070 cm−1 in the Al2(SO4)3 system were assigned to polynuclear hydroxyaluminum species having been formed due to reflux process.

Effect of octahedrally coordinated aluminum ions on the uptake of Au(III) chloro-hydroxy complexes in Al-Si systems

2015 ◽  
Vol 49 (4) ◽  
pp. 343-350
Author(s):  
Tsubasa Otake ◽  
Takushi Yokoyama ◽  
Paul C. M. Francisco ◽  
Koichiro Watanabe
Keyword(s):  
Aluminum Ions

OPTIMIZATION OF PROCESS FOR TOTAL RECOVERY OF ALUMINUM FROM SMELTING SLAG 2. REMOVAL OF ALUMINUM SULFATE

2013 ◽  
Vol 13 (1) ◽  
pp. 7-14 ◽  
Author(s):  
Romanita Teodorescu ◽  
Viorel Badilita ◽  
Maria Roman ◽  
Victoria Purcaru ◽  
Petre Capota ◽  
...  
Keyword(s):  
Aluminum Sulfate ◽  
Total Recovery ◽  
Smelting Slag

Preparation of Strong Acid Catalysts by Sulfate Treatment of Calcined Boehmite

1992 ◽  
Vol 57 (11) ◽  
pp. 2241-2247 ◽  
Author(s):  
Tomáš Hochmann ◽  
Karel Setínek
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Aluminum Sulfate ◽  
Solid Acid ◽  
Strong Acid ◽  
Acid Strength ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Preparation Methods ◽  
Indicator Method

Solid acid catalysts with acid strength of -14.52 < H0 < -8.2 were prepared by sulfate treatment of the samples of boehmite calcined at 105-800 °C. Two preparation methods were used: impregnation of the calcined boehmite with 3.5 M H2SO4 or mixing of the boehmite samples with anhydrous aluminum sulfate, in both cases followed by calcination in nitrogen at 650 °C. The catalysts were characterized by measurements of surface area, adsorption of pyridine and benzene, acid strength measurements by the indicator method and by catalytic activity tests in the isomerization of cyclohexene, p-xylene and n-hexane. Properties of the catalysts prepared by both methods were comparable.

Sign in / Sign up

Export Citation Format

Share Document