scholarly journals Microwave-Assisted Extraction of Essential Oil from Eucalyptus: Study of the Effects of Operating Conditions

2006 ◽  
Vol 3 (1) ◽  
pp. 31 ◽  
Author(s):  
A.A. Saoud ◽  
R.M. Yunus ◽  
R.A. Aziz
Keyword(s):  
Essential Oil ◽  
Steam Distillation ◽  
Extraction Efficiency ◽  
Raw Materials ◽  
Extraction Process ◽  
Operating Conditions ◽  
Microwave Exposure ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Eucalyptus Globules

Classical extraction of essential oil such as Soxhlet and steam distillation is still a formidable and time-solvent consuming. Microwave assisted process (MAP) is used to accelerate the extraction process of target compounds. It can be used for the extraction of compounds from various plants and animal tissues, or the extraction of undesirable components from raw materials. The investigation of microwave extraction of eucalyptus (globules ) essential oil using ethanol as solvent was carried out. The influence of material (eucalyptus)/solvent (ethanol) ratio, required doses of microwave, and time of microwave exposure on extraction efficiency, was studied. 

scholarly journals Yield Study of Tea Tree Essential Oil Using Microwave-Assisted Process

2006 ◽  
Vol 6 (1) ◽  
pp. 22
Author(s):  
Amer Ali Saoud ◽  
Rosli Mohd Yunus ◽  
Ramlan Abd. Aziz
Keyword(s):  
Essential Oil ◽  
Raw Materials ◽  
Extraction Process ◽  
Optimal Time ◽  
Solvent Ratio ◽  
Tree Leaves ◽  
Tea Tree ◽  
Microwave Exposure ◽  
Microwave Assisted ◽  
Optimal Feed

There have been developments on the use of microwave to accelerate the digestion of solid materials, the heating of materials, and, more recently, the extraction of solute from solids via solvent as extracting medium. Microwave-assisted process (MAP) was used to accelerate the extraction of target compounds. It can be used for the extraction of compounds from various plant and animal tissues or of undesirable components from raw materials. Tea tree leaves were used in this study to investigate the applicability of microwave irradiation for essential oil extraction. The microwave parameters studied were tea tree leaves/ethanol ratio as well as required dose of microwave and time of irradiation. Different ratios of tea tree leaves/ethanol had been examined in order to obtain the optimal feed/solvent ratio that would give the highest yield of extracted essential oil. The required number of microwave doses that provided an accomplished extraction process had been ascertained. The optimal time of microwave exposure was found to be at 3 min. The measurements of extracted tea tree essential oil constituents (Le., cineole, a-pinene, and y-terpinene) that represent the major constituents were performed using gas chromatography (GC) analysis to estimate the yield of extracted tea tree essential oil.

Dynamic performance of optimized microwave assisted extraction to obtain Eucalyptus essential oil: energy requirements and environmental impact

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Elizabeth Lainez-Cerón ◽  
Aurelio López-Malo ◽  
Enrique Palou ◽  
Nelly Ramírez-Corona
Keyword(s):  
Environmental Impact ◽  
Essential Oil ◽  
Dynamic Performance ◽  
Maximum Yield ◽  
Operating Conditions ◽  
Energy Requirements ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Eucalyptus Essential Oil

Abstract The dynamic performance of a microwave-assisted extraction (MAE) was studied during the extraction of eucalyptus essential oil. The effect of different process variables such as solid/liquid ratio (1:1, 1:3, or 1:5), stirring speed (0, 200, or 400 rpm), and power microwave output (360, 450, or 540 W) on obtained yield, energy requirements and environmental impact were assessed. The maximum yield was 1.26 ± 0.01% and the steam generation velocities between 4.8 and 8.8 g/min favor the extraction. In terms of environmental impact, the lowest EI99 value obtained was 6.93 ± 0.1 mPT/g. A multi-response optimization was performed to identify the operating conditions that maximize yield, while minimize energy requirements and environmental impact. Temperature dynamics and extraction kinetics were fitted to a second-order transfer function model, aimed to evaluate the role of heating patterns on the process performance. Finally, a controlled temperature experiment was carried out under the optimal conditions.

scholarly journals Microwave-Assisted Industrial Scale Cannabis Extraction

Technologies ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 45
Author(s):  
Marilena Radoiu ◽  
Harmandeep Kaur ◽  
Anna Bakowska-Barczak ◽  
Steven Splinter
Keyword(s):  
Continuous Flow ◽  
Extraction Efficiency ◽  
Scale Up ◽  
Extraction Process ◽  
Extraction Methods ◽  
Flowering Plant ◽  
Industrial Scale ◽  
Microwave Assisted ◽  
Operation Conditions ◽  
Assisted Extraction

Cannabis is a flowering plant that has long been used for medicinal, therapeutic, and recreational purposes. Cannabis contains more than 500 different compounds, including a unique class of terpeno-phenolic compounds known as cannabinoids. Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD) are the most extensively studied cannabinoids. They have been associated with the therapeutic and medicinal properties of the cannabis plant and also with its popularity as a recreational drug. In this paper, an industrial method for cannabis extraction using 915 MHz microwaves coupled with continuous flow operation is presented. The main advantages of the microwave-assisted extraction (MAE) are associated to the continuous-flow operation at atmospheric pressure which allows for higher volumes of biomass to be processed in less time than existing extraction methods, with improved extraction efficiency leading to increased final product yields, improved extract consistency and quality because the process does not require stopping and restarting material flows, and ease of scale-up to industrial scale without the use of pressurised batch vessels. Moreover, due to the flexibility of changing the operation conditions, MAE eliminates additional steps required in most extraction methods, such as biomass decarboxylation or winterisation, which typically adds at least a half day to the extraction process. Another factor that sets MAE apart is the ability to achieve high extraction efficiency, i.e., up to 95% of the active compounds from cannabis biomass can be recovered at industrial scale.

scholarly journals Optimization of Anthocyanin Extraction from Cockspur Coral (Erythrina Crista-Galli L.) Petals with Microwave-Assisted Extraction (MAE) using Response Surface Methodology

2021 ◽  
Vol 21 (2) ◽  
pp. 143
Author(s):  
Astrilia Damayanti ◽  
Bayu Triwibowo ◽  
Megawati Megawati ◽  
Miftahuddin Azhari ◽  
Sandra Anggita Fadriana
Keyword(s):  
Response Surface ◽  
Extraction Process ◽  
Operating Conditions ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Surface Method ◽  
Assisted Extraction ◽  
Order Polynomial ◽  
Independent Variable

Cockspur coral (Erythrina crista-galli L) petals are flowers that contain anthocyanins and active compounds of flavonoids and tannins. This study aims to determine the optimum conditions for the anthocyanin extraction process of cockspur coral petals using Microwave-Assisted Extraction (MAE), analyzed through the Response Surface Method (RSM). This process uses ethanol-hydrochloric acid solvents and a Box-Behnken experimental design involving three factors, namely the solvent ratios (w/v) (1:5, 1:15, and 1:25), microwave powers (300, 450, and 600 watts), and extraction times (3, 9, and 15 minutes). As a result, the second-order polynomial model was enhanced and sufficient to explain the variation of the data that denoted the significant correlation with the independent variables and the response. Derringer's desired function methodology was used for optimizing studies and generated ideal conditions for each or combined an independent variable.  The optimum anthocyanin extract of 5.82 mg/L was obtained at a power condition of 325,5 Watts, an extraction time of 3.05 minutes, and a solvent ratio of 20.5. Meanwhile, the operating conditions at a power of 310.8 Watts, a time of 14.94 minutes, and a solvent ratio of 24.96 resulted in the optimum color intensity (IC) of 1040.26. In the meantime, the optimum antioxidant activity was obtained at a power of 585.97 Watts, a time of 4.93 minutes, and a solvent ratio of 5.43 with IC50 of 0.115.

Microwave-Assisted Extraction of Garlic Essential Oil from Garlic

2011 ◽  
Vol 117-119 ◽  
pp. 1022-1026 ◽  
Author(s):  
Li Min Yang ◽  
Ling Ling Han ◽  
Zhuo Yang
Keyword(s):  
Essential Oil ◽  
Extraction Method ◽  
Product Yield ◽  
Extraction Process ◽  
Microwave Assisted Extraction ◽  
Factors Affecting ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Conventional Solvent Extraction ◽  
Garlic Essential Oil

Factors affecting microwave-assisted extraction of garlic essential oil from garlic were investigated experimentally. Suitable conditions for such extraction process were studied by single factor approach to improve the product yield. The product yield under the resultant suitable conditions can reach to 0.478% based on raw garlic cloves. The product yield for microwave-assisted extraction method is as 2.5 times as that for conventional solvent extraction approach.

scholarly journals EXPERIMENTAL AND MODELING STUDIES OF VIETNAM LEMONGRASS ESSENTIAL OIL EXTRACTION PROCESS USING RESPONSE SURFACE METHODOLOGY

2018 ◽  
Vol 56 (2A) ◽  
pp. 11-16
Author(s):  
Nguyen Trung Dung
Keyword(s):  
Response Surface Methodology ◽  
Moisture Content ◽  
Response Surface ◽  
Steam Distillation ◽  
Raw Materials ◽  
Specific Area ◽  
Extraction Process ◽  
Oil Extraction ◽  
Operating Conditions ◽  
Operating Parameters

Natural precious products such as aroma compounds, essential oils, and bio-activated materials are usually extracted from about 30,000 botanical species. These extracts are often high competitive market due to their small content (less than 1 %) in plants and high purification cost. Thus, development of a modeling for the optimization of the crude oil extraction is highly paid attention. In this work, a modeling of Vietnam lemongrass oil extraction using steam distillation is developed and the optimization of the process parameters is performed using response surface methodology (RSM). The operating parameters considered for the modeling and optimization are specific area of raw materials, moisture content of feedstock, and steam rate. Experimental data show that the oil yield from steam distillation of Vietnam lemongrass is significantly affected by the three mentioned factors. Box-Behnken design (BBD) and analysis of variance (ANOVA) are used to examine the effects of operating parameters on the extraction efficiency. On the basis of the measurements and RSM, a quadric regression model as a function of steam rate, specific area and moisture content of materials is estimated. The optimized operating conditions of the lemongrass hydrodistillation are also obtained by applying the proposed modeling.

scholarly journals KINETICS AND MODELING OF OIL EXTRACTION FROM VIETNAM LEMONGRASS BY STEAM DISTILLATION

2018 ◽  
Vol 55 (5A) ◽  
pp. 58
Author(s):  
Nguyen Dang Binh Thanh
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Rate Constant ◽  
Steam Distillation ◽  
Raw Materials ◽  
Energy Requirement ◽  
Operating Conditions ◽  
Order Kinetic ◽  
Kinetics Parameters ◽  
Process Rate Constant

Essential oils from parts of plants such as stump, flower, kernel, and seed are usually produced by extraction, distillation and mechanical press. In practice, steam distillation is commonly used for the extraction of crude essential oils since it is not only a simple process but also applicable at various scales. Furthermore, the method makes it possible for a keeping of precious components of the oils unchanged. Therefore, studies on kinetics and modeling of the essential oil steam distillation are needed for the optimization of the operating conditions, energy requirement, and the process scale-up.In this work, experiments of lemongrass (Cymbopogon Citratus) steam distillation were carried out and a kinetics model was developed for the extraction of lemongrass essential oil. Raw materials were pretreated by natural drying, primarily crushing and chopping prior to the distillation. The oil yield obtained is in the range of 2.1 – 2.9 ml/kg of raw materials. Composition of the crude oil extracted was measured by GC-MS. Measurements showing that the oil product contains 70.5 % of precious component–Citral in which Neral is 29.8 % and Geranial 40.7 %. The kinetics parameters were estimated from experimental data conducted at various operating conditions for different preparation of the raw materials. The process rate constant (extraction rate constant) describing the extraction efficiency obtained from this study is varied from 0.02 to 0.027 min-1 using first-order kinetic model.

Orthogonal test in optimizing microwave-assisted extraction process of magnolin from Magnoliae Flos

2010 ◽  
Vol 30 (5) ◽  
pp. 567-568
Author(s):  
Xiao-li LI ◽  
Ming-yuan ZHANG ◽  
Wei-quan ZHAO ◽  
Man Li ◽  
Hai-ying TENG ◽  
...  
Keyword(s):  
Extraction Process ◽  
Orthogonal Test ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction
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