acid activation technology for bentonite in Oman

Physico-chemical variation in bentonite by sulfuric acid …

The activation of bentonite is carried out in a continuous stirred tank reactor at low temperatures between 70 and 120 o C in the presence of activation agents, mostly sulfuric acid.

Optimization of bleaching power by sulfuric acid …

Acid activation was carried out by heating muds prepared from Ca-rich bentonite (CaB), sulfuric acid (H 2 SO 4) and distilled water, yielding various bleaching earths (BEs).

Preparation and Characterization of Acid …

The characteristics of acid-activated raw bentonite (RB) activated with binary acid solutions sulfuric acid + nitric acid, nitric acid + phosphoric acid, and phosphoric acid + sulfuric acid, at a concentration …

Preparation and Characterization of Acid …

Our previous study reported that the acid activation of bentonite using a single-acid solution, such as sulfuric acid, nitric acid, …

One step acid activation of bentonite derived adsorbent for …

Thermodynamic analysis illustrated that the adsorption process was feasible and exothermic in nature, while the characterization findings verified the alteration of FTIR bands. Herein, the facile one step acid activation of bentonite derived functionalized adsorbent (AB) for the effective remediation of both ionic and non-ionic secondary …

A systematic and comprehensive study of Eco-friendly …

The activation of bentonite results in an increase in the number of active sites, increase the pore volume, increase the surface area, etc. The major process of activation is thermal and acid activation. The acid activation is mostly carried out by sulphuric acid …

Modeling and optimization process parameters of acid activation …

The effect of acid activation on the textural properties of a bentonite from Serbia was investigated using response surface methodology. The influence of activation parameters (temperature, time, acid normality, solid-to-liquid ratio and stirring rate) on the specific surface area, pore volume, pore diameter and bulk density of the activated …

Optimization of bleaching power by sulfuric acid activation of bentonite

Acid activation was carried out by heating muds prepared from Ca-rich bentonite (CaB), sulfuric acid (H 2 SO 4) and distilled water, yielding various bleaching earths (BEs).The roles of each of the process variables, namely mass fraction of H 2 SO 4 (x) in the dried CaB and pure H 2 SO 4 mixture, heating temperature (T) and contact …

Naturally occurring bentonite clay: Structural augmentation

Abstract. Locally available Bentonite clay is structurally augmented by acid activation to enhance the catalytic properties. Bentonite sample post beneficiation was …

The Acid Activation of Some Bentonite Clays.

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Synergistic modification of bentonite by acid activation and …

In this paper, a new facile modification strategy to enhance the adsorption performance of bentonite utilizing synergistic acid activation and hydroxyl iron pillaring …

Insights on applications of bentonite clays for the removal …

However, a decreased concentration of Ca 2+, Mg 2+, and Fe 3+ ions was observed after acid activation (Fernandes et al. 2020). Table 1 Application areas of BCs. Full size table. ... conducted thermal activation of bentonite in a muffle furnace in the temperature range of 50–500 °C for a predetermined time varying from 50 to 120 min. The ...

Characterization of activated bentonite clay mineral and …

The presence of emerging pollutants such as hazardous chemicals, pharmaceuticals, pesticides, and endocrine-disrupting chemicals in water sources is a serious concern to the environment and human health. Thus, this study focused on exploring the interaction mechanisms between ciprofloxacin (CIP) (antibiotic) and clay (a …

Acid Treatment on Bentonite Catalysts for Alkylation of …

3.1 Test of various catalysts for alkylation of diphenylamine and 1-nonene. Various solid acid catalysts with different pore structures, HZSM5, HY, Hβ and raw bentonite, were tested by the alkylation of DPA and 1-nonene, and the results are shown in Fig. 1.The liquid product was consisted of unconverted diphenylamine and nonene, and …

Fuel Processing Technology

XRD spectra of the natural and the acid activated bentonite catalysts are given in Fig. 1.The natural bentonite cations such as sodium- rich Montmorillonite (NM), with the d (001) - value of 1–25 nm as the common mineral in clay, appears to be well crystallized.The most pronounced modifications occur in the Montmorillonite d (001) …

Effect of the Acidic and Alkaline Activation of Bentonite

Abstract A study is performed of the effect the means of activation of bentonite-like clays (acidic, alkaline, combined) have on the adsorption characteristics of Fe3+ ions under static conditions. The mechanism of the acidic and alkaline activation of montmorillonite is identified and found to depend on the concentration of the activating …

Modeling and optimization process parameters of acid activation …

The effect of acid activation on the textural properties of a bentonite from Serbia was investigated using response surface methodology. The influence of activation parameters (temperature, time ...

Sulphuric Acid Activation of a Calcium Bentonite

The particle size distributions of the original and acid-activated samples showed that the acid activation strongly affected the particle sizes of the particles. While 97.8% of the original bentonite sample is less than 10 µm in size, 97.8% of the activated samples with 0.5 M acid and 92% of the activated sample with 4 M acid are less than …

Naturally occurring bentonite clay: Structural augmentation

Activation of Bentonite clay using hydrochloric acid (HCl) [15], [16], sulfuric acid (H 2 SO 4) [17], [18] and other acids [19], [20] has been reported. Out of all acids, H 2 SO 4 is preferred mostly as the activation can be performed by mild process conditions and the quality of the end product is better with high specific surface area and ...

Acid activation of bentonite clay for recycled …

purification has become a topic of research. In this study, the use of bentonite clay modified by acid activation is proposed. Sulfuric acid, acetic acid (v-acid/w-clay ratio=20, 40 and 60%) and sulfuric/acetic mixtures (1:1 ratio) were used in the bentonite clay activation. The activated clays were used in the UMO

Characterization of Acid Activation of Bentonite Clay of …

2.2 Activation of bentonite clay Activation was done based study of Samira & Moussa, 2014; 400 mL of hydrochloric acid (2M HCl) (98%, d = 1.98 g/cm3) solution was added to 50 g of NB sample. The ...

Optimization of bleaching power by sulfuric acid activation …

Acid activation was carried out by heating muds prepared from Ca-rich bentonite (CaB), sulfuric acid (H 2 SO 4) and distilled water, yielding various bleaching …

Preparation and characterization of acid-activated bentonite …

Powder Technology; View via Publisher. Save to Library Save. Create Alert Alert. Cite. Share. 123 Citations. Highly Influential Citations. 3. ... The objective of this work is to determine changes of surface properties of a bentonite after acid activation, using hydrochloric acid solutions (HCl) at room temperature. XRD, FX, FTIR, MEB, and BET ...

Acid activation of bentonite clay for recycled

activation is proposed. Sulfuric acid, acetic acid (v-acid/w-clay ratio=20, 40 and 60%) and sulfuric/acetic mixtures (1:1 ratio) were used in the bentonite clay activation. The activated clays ...

Zn-doped bentonite catalysts for waste engine oil cracking: …

DOI: 10.1016/j.ces.2024.120638 Corpus ID: 272102819; Zn-doped bentonite catalysts for waste engine oil cracking: Thermal treatment offers a cleaner alternative to acid activation

Preparation and characterization of acid-activated bentonite …

The Kütahya calcium bentonite (CaB) from Turkey shows significant changes in crystal structure, chemical composition and porosity with H 2 SO 4 activation realized by heating its acidic aqueous suspension at 97 °C for 6 h. The acid content was changed from zero to 70% by mass, based on the dry bentonite–acid mixture. It was estimated from …

Rheological Properties of Acid-Activated Bentonite …

Acid-activated bentonites are utilized in many applications, including those that depend on their rheological properties and behavior, but little information is available regarding the rheological characteristics of this important industrial material. The purpose of this study was to investigate the effects of solids concentration, salt concentration, and …

Acid-activation assisted by microwave of a Brazilian bentonite …

DOI: 10.1016/J.CLAY.2013.08.017 Corpus ID: 95093480; Acid-activation assisted by microwave of a Brazilian bentonite and its activity in the bleaching of soybean oil @article{Foletto2013AcidactivationAB, title={Acid-activation assisted by microwave of a Brazilian bentonite and its activity in the bleaching of soybean oil}, author={Edson Luiz …

Rheological Properties of Acid-Activated Bentonite Dispersions

The purpose of this study was to investigate the effects of solids concentration, salt concentration, and pH value on the shear rate, shear stress, and …