acid activation of bentonite used lubricant oils

acid activation of bentonite used lubricant oils

Acid activation of Bentonite for use as a vegetable oil ...

Acid activation of Bentonite for use as a vegetable oil bleaching agent The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid

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(PDF) Acid activation of bentonite clay for recycled ...

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 ...

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Acid activation of Bentonite for use as a vegetable oil ...

The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid concentration, contact time and temperature, were considered. The calculations made indicated that all variables display advantageous effects up to a certain ...

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Acid activation of Bentonite for use as a vegetable oil ...

The acid activation of an Algerian bentonite was investigated using a factorial 33 experiment design in order to improve the bleaching capacity in the colza oil processing.

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Acid activation of Bentonite for use as a vegetable oil ...

GRASAS Y ACEITES, 60 (4), JULIO-SEPTIEMBRE, 343-349, 2009, ISSN: 0017-3495 DOI: 10.3989/gya.108408 Acid activation of Bentonite for use as a vegetable oil bleaching agent By B. Makhoukhi,a M. A. Didi,a,* D. Villeminb and A. Azzouzc a Chemistry Department, Faculty of Sciences, Tlemcen University- BP119, Tlemcen, Algeria b ENSICAEN, LCMT, UMR CNRS 6507, Caen-

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Acid activation of Bentonite for use as a vegetable oil ...

The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid concentration, contact time and temperature, were considered. The calculations made indicated that all variables display advantageous effects up to a certain...

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(PDF) Sulphuric Acid Activation of a Calcium Bentonite

The acid activation of bentonite from Middle Anatolia, consisting of mostly montmorillonite, with a hot solution of H 2 SO 4 with different concentrations was carried out. ... Oil refining is an ...

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Colza oil bleaching through optimized acid activation of ...

Jan 01, 2009  The acid activation of an Algerian bentonite was investigated using a factorial 3 3 experiment design in order to improve the bleaching capacity in the colza oil processing. Optimized acid treatment of this bentonite gave rise to an effective bleaching earth in colza oil treatment.

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Bleaching of Some Vegetable Oils with Acid-Activated ...

of pigmented vegetable oils. Key Words: Acid activation, Kaolinite, Oil bleaching, Freundlich isotherm, Bentonite. INTRODUCTION Bentonite and kaolinite are econmic minerals with wide variety of industrial applications 1. In Jordan bentonites is mainly used in casting metal foundries, in the drilling of wells and as bleaching clay for oils and fats.

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Acid activation of Bentonite for use as a vegetable oil ...

The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid concentration, contact time and temperature, were considered.

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Acid activation of Bentonite for use as a vegetable oil ...

The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid concentration, contact time and temperature, were considered. The calculations made indicated that all variables display advantageous effects up to a certain...

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Acid activation of Bentonite for use as a vegetable oil ...

The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid concentration, contact time and temperature, were considered.

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Acid activation of Bentonite for use as a vegetable oil ...

The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid concentration, contact time and temperature, were considered.

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Maximum Bleaching of Vegetable Oils by Acid-activated ...

The particle size distribution of the bentonite was not affected to any great extent by acid activation (Önal and Sarıkaya 2007b). Alkali-refined soybean oil (SO) and cottonseed oil (CSO) used for bleaching were acquired from a vegetable oil plant and used as received (Marsa, Istanbul, Turkey). Analytically pure

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Activation of Iraqi Bentonite Powder with H2SO4 and its ...

colored oil before and after treatment with activated clay. This results obtained exhibited the values of surface area and pore volume were 59.9) m (C. The result revealed that optimum acid activation occurred when (10%) acid was used in clay mixture. 2 /g and 0.1309( ) m. 3 /g respectively for

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(PDF) The Use of Bentonite to Remove Dark Colour in ...

The bleaching process at 90°C of an olive oil from Jaen (Spain) using natural bentonite and bentonite acid treated with H2SO4 (over a concentration range between 0.50 M and 5.00 M) has been studied.

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Activation of Jordanian Bentonite by Hydrochloric Acid and ...

2.2. Activation of Bentonite by Hydrochloric Acid. The hydrochloric acid (HCl) (98%, g/cm 3) and other chemicals used are of analytical grade. The purified bentonite was prepared for acid activation: 15 g ± 0.01 g of the purified sample was weighed into a flask and 200 mL of 1.0 M HCl was added.

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Effect of Flouride Acid Activation of Natural Bentonite on ...

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...

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Optimization of Acid Activation Conditions for Athi River ...

Keywords: Acid activation, Bentonite clay, Oil bleaching, Adsorption isotherm I. Introduction The term bentonite was first used to designate a particular highly colloidal, plastic clay found near Fort Benton in the Cretaceous beds of Wyoming, USA [1]. Later the term was attributed to every plastic clay

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Waste Lubricating Oil Treatment by Adsorption Process ...

ASTE lubricant oils are generated from vehicles and machineries. This waste lubricating oil has higher ... for the finishing process of lubricating oil is the acid activated bentonite clay, but the mechanism of their action on the ... kernel powder was used without acid activation and with 15 % (wt) sulfuric acid activation. The egg shale was ...

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Hydrophobic Cetyltrimethylammonium Bromide-Pillared ...

To promote a minimal use of acid in the activation of bentonite and to maintain oil quality during refinery and storage, a new class of bleaching agent, cetyltrimethylammonium bromide (CTAB)-pillared bentonite ([email protected]), is fabricated. The influences of three independent intercalation variables, including temperature T (40, 50, and 60 °C), time t (2, 4, and 6 h), and CTAB loading mc (0.2, 0 ...

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Application of Iranian nano-porous Ca-bentonite for ...

Mar 25, 2015  The activation of bentonite by sulfuric acid, 1.00 mol l −1, yields an adsorbent material that is efficient in removal of color from waste oil and is better than the natural one. The decolorizing power of clay treated by nitric acid at the same condition was shown to be inefficient for the recovery of used lubricant oil.

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The Acid Activation of Some Bentonite Clays. The Journal ...

The Acid Activation of Some Bentonite Clays. G. A. Mills, James. Holmes, and ; ... (centerwestern Tunisia), synthesis of zeolite and clarification of soybean oils. Applied Clay Science 2017, 138 , 1-11. ... Acid activation and bleaching capacity of bentonites from the

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The Use of Bentonite to Remove Dark Colour in Repeatingly ...

Acid-activated bentonite was used as a bleaching agent to remove the dark color in repeatingly used palm oil. Two bentonite samples with different colors were used. It was found that the paler one gave better bleaching results. The optimum condition needed 5 h to reflux bentonite with sulfuric acid; pH of the bentonite suspension was 3, bleaching temperature was 80–85°C and bleaching time ...

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Acid activation of Bentonite for use as a vegetable oil ...

The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid concentration, contact time and temperature, were considered.

More

Acid activation of Bentonite for use as a vegetable oil ...

The design of various experiments in order to assess and simulate the effects of the acid activation of an Algerian bentonite on the bleaching capacity of Colza oil is described. Three key parameters of the acidic activation, namely acid concentration, contact time and temperature, were considered.

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Acid-activation assisted by microwave of a Brazilian ...

Oct 01, 2013  The activation of bentonite clay for the use as oil decolorizing agent is conventionally carried out by a batch system with agitation in the boiling temperature of the acid solution, at atmospheric pressure (Foletto et al., 2006, Foletto et al., 2011, Rossi et al., 2003, Wu et al., 2006).

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Acid activation of upper Eocene Ca-bentonite for soybean ...

Aug 13, 2017  Various forms of activated materials were used with a 75% proportion to leach soybean oil. Results were compared with commercial bentonite (Tonsil) having surface area (378 m2/g). The activated sample M1 during 4 h at 75 °C possesses a decolorizing capacity of about 85% greater than the oil treated by Tonsil in laboratory (58%).

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The Use of Bentonite to Remove Dark Colour in Repeatingly ...

Acid-activated bentonite was used as a bleaching agent to remove the dark color in repeatingly used palm oil. Two bentonite samples with different colors were used. It was found that the paler one gave better bleaching results. The optimum condition needed 5 h to reflux bentonite with sulfuric acid; pH of the bentonite suspension was 3, bleaching temperature was 80–85°C and bleaching time ...

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Effect of Flouride Acid Activation of Natural Bentonite on ...

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...

More

The Acid Activation of Some Bentonite Clays. The Journal ...

The Acid Activation of Some Bentonite Clays. G. A. Mills, James. Holmes, and ; ... (centerwestern Tunisia), synthesis of zeolite and clarification of soybean oils. Applied Clay Science 2017, 138 , 1-11. ... Acid activation and bleaching capacity of bentonites from the

More

Application of Iranian nano-porous Ca-bentonite for ...

Mar 25, 2015  The activation of bentonite by sulfuric acid, 1.00 mol l −1, yields an adsorbent material that is efficient in removal of color from waste oil and is better than the natural one. The decolorizing power of clay treated by nitric acid at the same condition was shown to be inefficient for the recovery of used lubricant oil.

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Hydrophobic Cetyltrimethylammonium Bromide-Pillared ...

However, the acid/base modification technique induces corrosion of the processing equipment and decrease the oil stability. Excessive use of acid/base during bentonite activation may also cause environmental problems. Therefore, alternative chemical activation is required to

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Bleaching of palm oil by activated local bentonite and ...

Jun 12, 2013  Statistical modelling of acid activation on cotton oil bleaching by Turkish bentonite. ... Modeling and optimization process parameters of acid activation of bentonite by response surface ...

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Characterization, Acid Activation and Bleaching ...

Apr 01, 2006  The initial increase in bleaching capacity with increasing sulfuric April, 2006 Characterization, Acid Activation and Bleaching Perfonnance of Bentonite from Xinjiang 257 Table 3 Cottonseed oil bleaching efficiencies of the acid activated bentonites Bleaching performance Acid values mg-g'1 Peroxide values meq-kg'1 Samples BC,% BC,% BC, % M54nm BC.%

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Statistical modelling of acid activation on cotton oil ...

Jul 01, 2006  In order to determine the optimum conditions and derive a model for acid activation of a Turkish bentonite, a full factorial of the type 2 4 has been used. Contact time (X 1), solid to liquid ratio (X 2), acid concentration (X 3) and moisture of bentonite (X 4), were chosen as independent variables to model.Factor levels are shown in Table 1.The matrix for four variables is varied at two ...

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Activation and Purification of Bentonite for the Treatment ...

Currently, substantial amount of activated bentonite used by vegetable oil industries are imported. In this research, the bentonite was obtained locally from the region of Leuwiliang (Bogor, West Java). The bentonite was purified using solution of sodium-hexa-metaphosphate (NaPO3)6, and was activated using acid reflux methods (H2SO4, 100oC).

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Optimization Of Acid Activation And Bleaching Performance ...

concentration of acid used in the activation process. Palm oil was used to investigate the bleaching performance of the activated clay samples. When the oil was bleached at 90 °C for 30 minutes using 4% clay activated with 2 mol/L H 2 SO 4, the bleaching performance increased up to 98%.

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