Microwave Assisted Preparation and Physico-Chemical Properties of Mixed Oxides Silica-Zirconia Montmorillonite K10 Nanocomposite

Sekewael, Serly J.; Wijaya, Karna; Triyono, Triyono; Budiman, Arief

doi:10.14233/ajchem.2016.19982

Cited by 3 publications

(3 citation statements)

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“…Synthetic montmorillonite K10 itself is called montmorillonite acid because it has been through an activation with acid. These results are not much different, as reported by (Sekewael, Wijaya, Triyono, & Budiman, 2016). The acidity of montmorillonite K10 of 4.83 mmol/g was measured using the gravimetric method (Sekewael, Wijaya, Triyono, & Budiman, 2016).…”

Section: Resultssupporting

confidence: 73%

“…These results are not much different, as reported by (Sekewael, Wijaya, Triyono, & Budiman, 2016). The acidity of montmorillonite K10 of 4.83 mmol/g was measured using the gravimetric method (Sekewael, Wijaya, Triyono, & Budiman, 2016). Montmorillonite K10 was used as a good acid catalyst for lauric acid esterification (Sekewael, Wijaya, & Triyono, 2020).…”

Section: Resultssupporting

confidence: 53%

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Determination of Surface Acidity on The Natural and Synthetic Montmorillonite Clays by Titration Method

Sekewael

2021

Indo. J. Chem. Res.

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Determination of surface acidity on the natural and synthetic montmorillonite clays has been carried out using the acid-base titration method to count the number of bound acid sites per gram of clay. The total acidity of natural and synthetic montmorillonite surfaces obtained was 4.67 and 5.33 mmol/g, respectively. FTIR analysis results indicate the presence of functional groups from the tetrahedral and octahedral constituents. Both samples have similar absorption patterns. The similarity of absorption patterns was followed by a decrease in intensity and shift in some absorption bands, and the appearance of new absorption bands.

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Section: Resultssupporting

confidence: 73%

Section: Resultssupporting

confidence: 53%

Determination of Surface Acidity on The Natural and Synthetic Montmorillonite Clays by Titration Method

Sekewael

2021

Indo. J. Chem. Res.

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“…However, persistence of a weak band at 1041 cm -1 means layer structure of the authentic clay is not entirely damaged, in line with the XRD results. The band at 794 cm -1 related to cristobalite not only survives the acid leaching but also increases the intensity throughout the process [10][11]. The particular BET areas of the examined samples can be seen in Table 1.…”

Section: Iii1 Physicochemical Characterization Of Acid Activation Bmentioning

confidence: 97%

Effect of Flouride Acid Activation of Natural Bentonite on Bleaching of Palm Oil

Siregar¹,

Irma²,

Perdana³

et al. 2019

Proceedings of the International Conference of CELSciTech 2019 - Science and Technology Track (ICCELST-ST 2019)

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A natural bentonite from Indonesia was activated with 1 % of fluoride acid. In characterizing the activated and raw clay samples, XRD, BET and infrared spectroscopy were utilized. Bleached oil was analysed to find out peroxide value content, the percentage of colour reduction (%CR), acid value as well as the percentage of free fatty acid (%FFA) content before and after bleaching. Bleaching efficiency was calculated from measurement of absorbance of UV light by frying oil before and after treatment with activated clay. The BET results obtained exhibited the values of surface area and pore volumes were 26.893 m 2 /g as well as 0.067 cc/g each for natural bentonite, after the activation with 1 % of HF acid these values changed to 43.167m 2 /g and 0.108cc/g, respectively. The optimum bleaching condition of clay dosage and contact time of bleaching were 2 gram and 120 minutes resulted in %FFA was 0.27%, acid value was 0.537, peroxide value was 9.57meq/kg, oil retention was 54.48% and 80% of luminance of colour reduction. Our results show that activated bentonite can be used to reduce the concentration of peroxide value, the darkness colour of frying oil to reduce, and free fatty acid adsorption or reduction in acid value efficiencies increase with higher adsorbent dosages

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Chemical Modification of Montmorillonite K10 and Its Catalytic Activity

2020

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Montmorillonite K10 (Mt-K10) was chemically modified using a silica-zirconia mixture and the resulting product was named SZMK. The product had an increased total surface acidity, catalytic activity, porosity, and thermal stability. Ammonia adsorption tests and further verification with FTIR and TGA/DTA showed that the acidity of SZMK was higher (0.16 mmol/g) than that of Mt-K10. Catalytic performance was analyzed on the esterification reaction of lauric acid. Refluxing lauric acid and methanol (molar ratio of 1:20) for 20 h with a 20 % (w/w) catalyst showed that catalytic activity of SZMK is high, i.e. methyl laurate production 98.18% (w/w) was achieved.

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Microwave Assisted Preparation and Physico-Chemical Properties of Mixed Oxides Silica-Zirconia Montmorillonite K10 Nanocomposite

Cited by 3 publications

References 0 publications

Determination of Surface Acidity on The Natural and Synthetic Montmorillonite Clays by Titration Method

Determination of Surface Acidity on The Natural and Synthetic Montmorillonite Clays by Titration Method

Effect of Flouride Acid Activation of Natural Bentonite on Bleaching of Palm Oil

Chemical Modification of Montmorillonite K10 and Its Catalytic Activity

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