Reactions between kaolin and inorganic salts, such as sodium hydrogen sulfate and ammonium sulfate, or inorganic acids, such as hydrochloric acid and sulfuric acid, can be focused either on the production of Al or on the adjustment of the silica-to-alumina ratio of the kaolin. On the basis of adjusting the silica-to-alumina ratio, kaolin and ammonium …
Kaolin was transformed to meta-kaolin by calcination at 800oC for 2h. γ-alumina powder was synthesized through extracting alumina from meta- kaolin via H2SO4 and meta-kaolin reactions and consequently precipitation in ethanol, which led to form the aluminum sulfate. The precipitated aluminum sulfate was dried and calcined at 900 oC for 2h ...
Other articles were reported for the production of aluminum sulfate for different types of clays81920, from aluminum industry wastes21 22 2324 or from different industrial ...
Both AS and aluminum sulfate–Enteromorpha extract (AS–Ee) were used to treat synthetic kaolin–humic acid (HA) water, then the flocculation performance of two coagulants was comparatively investigated in terms of residual turbidity, UV 254 absorbance, dissolved organic carbon (DOC) removal efficiency and zeta potential. …
In this research, the process of mixing the sulfuric acid and kaolin, aluminum sulfate paste subsequently extracted with distilled water that has been heated to obtain aluminum …
Although the Al extraction efficiency can reach about 98.0%, this method produces highly toxic and highly corrosive substances such as hydrogen fluoride (HF) during the production process. Furthermore, some works described methods to extract aluminum from kaolin by acid leaching at high pressure (Xiao et al., 2015, 2018).
The compound bioflocculant (CBF)–aluminum sulfate (AS) dual-coagulant and AS were comparatively studied for the coagulation of kaolin–humic acid solution. Floc properties including floc growth rate, size, strength, recoverability and fractal dimension under different pH conditions were investigated by Mastersizer 2000.
Dear Sir, We have an old wet process kaolin factory. It produce upgraded kaolin from chemically and/or physically altered granite/pegmatite. The product mainly used as an input for aluminum sulfate production. The capacity of the factory now a day is reduced due to the age.
The present paper focuses on the possible use of kaolin, as an abundant, cheap and high-aluminum content raw material, in alumina production, via the application of the Aranda-Mastin technology in ...
A homogeneous mixture of Al2(SO4)3·18H2O and Na2SO4·10H2O was precipitated by dropping the mixed solution of kaolin-derived aluminum sulfate and sodium hydroxide into ethanol with agitation by ...
Among the different natural aluminum sources, kaolin clay seems to be an alternative candidate as raw material for alumina production, because of its high aluminum content in the form of kaolinite. The well-known Bayer process for alumina production cannot be used for alumina production from kaolin due to the dissolution …
Production Aluminium Sulphate [(Al2(SO4)3] from Kaolin … One of the main chemicals used in water treatment process are aluminum sulphate used as coagulant thus forming clean water. Aluminum sulfate [Al2(SO4)3] or alum is one of the chemicals that are required both in industry and water treatment companies.
Coagulation performance and floc properties of compound bioflocculant-aluminum sulfate dual-coagulant in treating kaolin-humic acid solution. ... low yields and high production cost [2], [10]. To overcome these limitations, researchers have done much work on screening of highly efficient strains and optimization of their culture conditions [9 ...
Kaolin was transformed to meta-kaolin by calcination at 800oC for 2h. γ-alumina powder was synthesized through extracting alumina from meta- kaolin via H2SO4 and meta-kaolin reactions and consequently precipitation in ethanol, which led to form the aluminum sulfate. The precipitated aluminum sulfate was dried and calcined at 900 …
In this study, aluminum sulfate (AS) was selected to combine with compound bioflocculant (CBF) for the treatment of synthetic kaolin-humic acid (HA) water. Two dual-coagulants, AS-CBF (AS dosed firstly) and CBF-AS (CBF dosed firstly), were prepared by dosing AS and CBF in reverse order.
This work extensively tackled the extraction, production, characterization, and application of leached poly aluminum chloride (PAC) from kaolin as a natural material to inhibit the pollution of ...
Following the closure of the mine, the Corporation has been unable to supply kaolin mineral to the Awash Melkassa Aluminum Sulphate and Sulfuric Acid Factory.Teshome Tessema, deputy general manager of Awash Melkassa Aluminum Sulphate and Sulfuric Acid SC, told The Reporter that, the factory ceased production as of February 16, due to the ...
Results from XRF analysis of kaolin in Table 1 shows that the major content of kaolin are the oxides of aluminium (25.8%) and silicate (63.4%), which is the characteristic feature of kaolin clays, and are in agreement with the previous findings that reported 31.43% Al2O3 and 63.64% SiO2 for same source of kaolin clay [30].
DOI: 10.1016/J.COLSURFA.2012.10.062 Corpus ID: 93639176; Influence of a new coagulant aid-Enteromorpha extract on coagulation performance and floc characteristics of aluminum sulfate coagulant in kaolin–humic acid solution treatment
Leathers tanned with the combination of aluminium sulphate from kaolin and mimosa vegetable tannin exhibited hydrothermal stability of up to 118 °C as compared to mimosa alone that showed the ...
For examples, compared with microbial flocculants and aluminum sulfate alone, dual-coagulant of microbial flocculants and aluminum sulfate obviously improved the flocculating efficiency to Kaolin ...
It was found that the intercalation of sulfuric acid leads to reduction of activation temperature of low-grade kaolin and high Al extraction efficiency of 99.2%. …
Aluminum foil can be utilized as a raw material for the production of potassium aluminum sulfate due to its high aluminum content. The objective of this study is to utilize aluminum waste into potassium aluminum sulfate. ... Converted aluminum can reach 82%. Keywords: Aluminum sulphate, Dry process, Kaolin, Sulphuric acid, Stirred reactor, 1 ...
Among the different clays, kaolin seems to be a more attractive candidate for alumina production, due to its high aluminium content. Kaolin consists mainly from kaolinite with the representative chemical formula Al 2 O 3.2SiO 2.2H 2 O, which is a two layer silicate mineral that typifies the kaolin group.
kaolin via H2SO4 and meta-kaolin reactions and consequently precipitation in ethanol, which led to form the aluminum sulfate. The precipitated aluminum sulfate was dried and calcined at 900˚C for 2h, which resulted the formation of γ-alumina. The structure of -alumina was confirmed by XRD and FTIR and the mean par-γ
Aluminum sulfate [Al 2 (SO 4) 3] or alum is one of the chemicals that are required both in industry and water treatment companies. This research objective was to study the …
The feasibility of extracting alumina from kaolin via a microwave extraction process was investigated by comparing reaction times, reaction temperatures, and acid concentrations under microwave treatment with the same factors under conventional thermal extraction. The maximum amount of alumina extracted from kaolin under …
Request PDF | High-efficiency extraction of aluminum from low-grade kaolin via a novel low-temperature activation method for the preparation of poly-aluminum-ferric-sulfate coagulant | A facile ...
Okefomo Agbarigidoma kaolin sourced from Kwara state was used to efficiently produce alum (aluminium sulphate) as a low-cost coagulant for domestic and industrial water treatment [128]. The clay ...
Kaolin was transformed to meta-kaolin by calcination at 800 ̊C for 2h. γ-alumina powder was synthesized through extracting alumina from meta- kaolin via H2SO4 and meta …
A study was carried out to investigate the use of locally sourced Kaolinite clay from Okefomo Agbarigidoma, Ilorin south Local Government of Kwara state, for the production of aluminum sulphate ...
Preparation of Aluminum Sulfate from Saudi Kaolin by Acid Treatment and its Application as a Flocculant for Surface Water Treatment Word MA Tantawy a,b, *, Hassen Harzali a,c and Abdulaziz A Alomari a
The extensive consumption of aluminum, combined with the shortage of the existing raw materials, and particularly bauxite, necessitates the exploitation of alternative raw materials for the production of alumina. The present paper focuses on the possible use of kaolin, as an abundant, cheap and high-aluminum content raw material, in alumina production, …
Alum is a commonly a hydrated double sulfate salt of aluminum with the general formula XAl(SO4)2·12H2O, wherein X is a monovalent cation that includes Ammonium or Potassium. It is used in water purification, medicines, cosmetics, food preparation, and flame-retardant paper and textiles. The goal of the present work is to …
This research aims to test the use of aluminum sulfate prepared from kaolin from Nawan, Al Baha, KSA, in the treatment of the surface water of the Al Ahsaba Dam. The analyses proved that the kaolin sample was pure and was successfully converted to amorphous metakaolin by calcination at 800 °C. Approximately 60% of alumina was extracted from …
Bo et al. [11] found the floc properties was significantly enhanced when a bioflocculant was added before/after aluminum sulfate with lower coagulants consumed in kaolin-humic acid solution ...
