BIOREFINERY. Pressurised hot water extraction of acetylated xylan from birch sawdust

2012 ◽  
Vol 27 (4) ◽  
pp. 680-688 ◽  
Author(s):  
Petri Kilpeläinen ◽  
Kaisu Leppänen ◽  
Peter Spetz ◽  
Veikko Kitunen ◽  
Hannu Ilvesniemi ◽  
...  
Keyword(s):  
Degradation Products ◽  
Degree Of Polymerization ◽  
Water Soluble ◽  
Hot Water ◽  
Water Extraction ◽  
Extraction Temperature ◽  
Hot Water Extraction ◽  
Flow Through

Abstract Birch sawdust was extracted using pressurized hot water (PHW), with the ultimate aim of maximizing the yield of large and intact non-cellulosic heteropolysaccharides, i.e. hemicellulose molecules. The extractions were performed using a flow-through vessel. Effects of different extraction temperatures between 140 and 200°C were evaluated. The amount of extracted xylans, as weil as monosaccharides, increased as the temperature rose to 1 90°C, accordingly the degree of polymerization of the xylans decreased. The extracted xylans retained most of the native acetyl groups and were thereby water-soluble after the extraction. The PHW extract contained not only xylan and other hemicellulose-derived oligomers, but fragmented Iignin molecules and some extractives as well. Only trace amounts of furfurals were found in the extract at lower extraction temperatures. An optimal yield of water-soluble, polymeric xylans with the smallest amount of unwanted impurities and degradation products was thus achieved at an extraction temperature of 1 80°C using the flow-through vessel

Effect of Ultrasonic Wave on Lentinan Extraction

2011 ◽  
Vol 291-294 ◽  
pp. 1339-1343
Author(s):  
Wen Bo Zhang ◽  
Hong Rui Li ◽  
Jun Tao ◽  
Bing Bing Dong
Keyword(s):  
Extraction Efficiency ◽  
Hot Water ◽  
Water Extraction ◽  
Extraction Technique ◽  
Orthogonal Experimental Design ◽  
Extraction Temperature ◽  
Lentinus Edodes ◽  
Extraction Condition ◽  
Hot Water Extraction ◽  
Extraction Parameters

The research in this paper optimized the extraction technique of lentinan with ultrasonic assistant method on the basis of hot water extraction technique, and investigated the promoting function of ultrasound to polysaccharides extraction. Extraction condition was selected by means of orthogonal experimental design, four factors and three levels L9(34), after key elements were respectively chosen through single factor experiments. Comparison between optimal extraction parameters of two method, hot water extraction technique and ultrasonic assistant extraction technique, showed decreased extraction temperature and significantly shortened extraction time, which existed in the second means, improved the extraction efficiency. Lentinus edodes polysaccharide extracted with ultrasonic assistant technique, the extraction rate and polysaccharide content percentage increased 6.22% and 8.66% respectively, comparative to which extracted with hot water extraction technique.

Characteristics of Films on the Surface of Sea Sand and Effects on the Dissolution of Chloride

2020 ◽  
Vol 842 ◽  
pp. 326-336
Author(s):  
Fei Long Sun ◽  
Shuai Wu ◽  
Quan Jiang ◽  
Huo Cheng Chen ◽  
Hong Yan Guan
Keyword(s):  
Chloride Content ◽  
Water Soluble ◽  
Hot Water ◽  
Water Extraction ◽  
New Method ◽  
Emission Spectrometry ◽  
Specimen Preparation ◽  
Test Results ◽  
Hot Water Extraction ◽  
Sea Sand

In this study, the effects of the specimen preparation method, temperature, and duration of the extraction step for the determination of the water-soluble chloride content of sea sand were investigated. The results demonstrated that increasing the heating temperature and duration promoted the dissolution of chloride, where the maximum value was obtained at 80°C and 60 min. Hot water extraction (80°C/60 min) could eliminate the effects of different specimen preparation methods on the final test results. Therefore, a new method was developed with drying at a temperature of 110 ± 5°C and hot water extraction at a temperature of 80°C for 60 min. The suitability of the new method for determining the water-soluble chloride content of sea sand was verified by testing the extracted specimens again. The results indicated that the chloride in sea sand dissolved fully with the new method, and thus it is suitable for testing the water-soluble chloride content of sea sand. Finally, the organic and inorganic compositions of the film adsorbed on the surface of sea sand were studied based on thermogravimetric analysis, inductively coupled plasma atomic emission spectrometry, ion chromatography, and total organic carbon measurements. The results indicated that a layer of substance (a multi-substance film) was adsorbed onto the surface of sea sand. This layer comprised inorganic salts (such as Cl–, Na+, Mg2+, SO42–, and Ca2+) and organic compounds, which were related to the composition of sea water. The multi-substance film greatly affected the dissolution and diffusion of chloride in the sea sand. Hot water extraction accelerated the dissolution of the film and increased the test results in terms of the water-soluble chloride contents.

scholarly journals Comparing of hot water and acid extraction of polysaccharides from proso millet

2017 ◽  
Vol 23 (1) ◽  
pp. 141-150
Author(s):  
Aishi Zhu ◽  
Shanshan Liu ◽  
Kanfeng Wu ◽  
Chuan Ren ◽  
Maoqian Xu
Keyword(s):  
Polynomial Equation ◽  
Hot Water ◽  
Water Extraction ◽  
Acid Extraction ◽  
Extraction Temperature ◽  
Hot Water Extraction ◽  
Solid Ratio ◽  
Proso Millet ◽  
Acid Aqueous Solution ◽  
Experimental Yield

The extraction of polysaccharides from proso millet was investigated experimentally using hot water and acid aqueous solution. Response surface methodology, based on a three-level, three- or four-variable Box-Behnken design for hot water extraction or acid extraction, respectively, was employed to obtain the best possible combination of acid concentration, liquid-solid ratio, extraction time, and extraction temperature for maximum polysaccharides yield. The obtained experimental data were fitted to a second-order polynomial equation and analyzed by appropriate statistical methods. The corresponding optimum extraction conditions of each method were obtained. Under the optimum conditions, the experimental yield was well in close agreement with the predicted value by the model. The results showed that the polysaccharides yield of acid extraction was 42.13 mg g-1, significantly higher than 20.07 mg g-1 of the yield of hot water extraction, the obtained equation could be used to predict the extraction experimental results.

scholarly journals Dissolution of wood components during hot water extraction of birch

2021 ◽  
Author(s):  
Joanna Wojtasz-Mucha ◽  
Merima Hasani ◽  
Hans Theliander
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Hot Water ◽  
Water Extraction ◽  
Hot Water Extraction ◽  
Platform Chemicals ◽  
Milled Material ◽  
Small Flow ◽  
Flow Through ◽  
Insight Into

AbstractAutohydrolysis-based pretreatments enable extraction of hemicellulose from wood tissue prior to the paper pulp cooking processes enabling their further use as platform chemicals and in material applications. In this study, hot water extraction of birch meal was conducted in a small flow-through system. The combination of high surface area of the milled material with increased driving force induced by constant flow of freshwater, together with fast evacuation of extract, enabled a detailed study of the dissolution process. Based on the findings, deeper insight into acidification and autohydrolysis progress was obtained.

scholarly journals Selective Extraction of Cannabinoid Compounds from Cannabis Seed Using Pressurized Hot Water Extraction

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1335 ◽  
Author(s):  
Yannick Nuapia ◽  
Hlanganani Tutu ◽  
Luke Chimuka ◽  
Ewa Cukrowska
Keyword(s):  
Cannabis Sativa ◽  
Polar Compounds ◽  
Hot Water ◽  
Water Extraction ◽  
Extraction Time ◽  
Extraction Temperature ◽  
Plant Materials ◽  
Hot Water Extraction ◽  
Pressurized Hot Water Extraction ◽  
Cannabinoid Compounds

Phytochemicals of Cannabis sativa mainly for the use in the different industries are that of delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD). Pressurized hot water extraction (PHWE) is seen as an efficient, fast, green extraction technique for the removal of polar and semi-polar compounds from plant materials. The PHWE technique was applied to extract cannabinoid compounds from Cannabis sativa seed. Response surface methodology was used to investigate the influence of extraction time (5–60 min), extraction temperature (50–200 °C) and collector vessel temperature (25–200 °C) on the recovery of delta-9-tetrahydrocannabinol (THC), cannabinol (CBN), cannabidiol (CBD), cannabichromene (CBG) and cannabigerol (CBC) from Cannabis sativa seed by PHWE. The identification and semi quantification of cannabinoid compounds were determined using GCXGC-TOFMS. The results obtained from different extractions show that the amount of THC and CBN was drastically decreasing in the liquid extract when the temperature rose from 140 to 160 °C in the extraction cell and the collector′s vessel. The optimal conditions to extract more CBD, CBC, and CBG than THC and CBN were set at 150 °C, 160 °C and 45 min as extraction temperature, the temperature at collector vessel, and the extraction time, respectively. At this condition, the predicted and experimental ratio of THCt (THC + CBN)/CBDt (CBD + CBC+ CBG) was found to be 0.17 and 0.18, respectively. Therefore, PHWE can be seen as an alternative to the classic extraction approach as the efficiency is higher and it is environmentally friendly.

Hemicellulose extraction and its effect on pulping and bleaching

TAPPI Journal ◽  
2013 ◽  
Vol 12 (10) ◽  
pp. 45-52 ◽  
Author(s):  
TROY RUNGE ◽  
CHUNHUI ZHANG
Keyword(s):  
Degradation Products ◽  
Cellulose Degradation ◽  
Hot Water ◽  
Water Extraction ◽  
Fiber Morphology ◽  
Hot Water Extraction ◽  
Hemicellulose Content ◽  
Elemental Chlorine ◽  
Liquid Hot Water ◽  
Hemicellulose Removal

A potential biorefinery is envisioned to use the hemicellulose portion of biomass to create transportation fuels or chemicals and the cellulose portion for fiber to be used in papermaking. To understand the effect on hemicellulose removal to pulpability and bleachability, a liquid hot water extraction was performed on two types of biomass with high hemicellulose content: poplar and miscanthus. The resulting materials were pulped using either a soda anthraquinone or kraft process. The pulps were then oxygen delignified and bleached with an elemental chlorine free sequence. The results demonstrate that a significant portion of hemicellulose can be extracted using liquid hot water extraction conditions of 170°C, 60 min, and a 6:1 ratio, with minimal glucan degradation. These low hemicellulose-content pulps delignified similarly to the control pulp, but had lower oxidative demand because of the absence of hemicellulose degradation products. Oxygen delignification of the low hemicellulose-content pulps was enhanced, but so was cellulose degradation. The delignification gains resulted in higher brightness ceilings for the pulps when a D(EP)D sequence was used. Measured fiber morphology did not change significantly from extracting the hemicellulose. Overall, hemicellulose extraction before pulping improved the efficiency of pulping and bleaching materials to a high brightness, but increased cellulose degradation.

Optimization of ultrasonic extraction of Lycium barbarum polysaccharides using response surface methodology

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Jitian Song ◽  
Shi Dongqi ◽  
Su Hang ◽  
Feng Yongxia ◽  
Tian Wei
Keyword(s):  
High Efficiency ◽  
Hot Water ◽  
Ultrasonic Extraction ◽  
Water Extraction ◽  
Extraction Time ◽  
Ultrasonic Power ◽  
Extraction Temperature ◽  
Liquid Ratio ◽  
Lycium Barbarum ◽  
Hot Water Extraction

AbstractUltrasonic extraction was a new development method to achieve high-efficiency extraction of Lycium barbarum polysaccharides instead of hot water extraction. In this paper, the single factor method combined with the box Behnken design of response surface method was used to study the influence of extraction time, extraction temperature, material liquid ratio and ultrasonic power on the extraction rate of L. barbarum polysaccharide. The results indicated that the best extraction rate of L. barbarum polysaccharide was 12.54 ± 0.12% under the conditions of 80 min for extraction time, 73 °C for extraction temperature, 1 g:38 mL for material to liquid ratio, and 185 W for ultrasonic power. Under the same operating conditions, the yield of L. barbarum polysaccharide using ultrasonic extraction was 83.3%, which was higher than that hot water extraction. Moreover, the extraction time of ultrasonic extraction was only 47% of that using hot water extraction. This suggested that there was great potentials of using ultrasonic extraction in the realization of high-efficiency extraction of L. barbarum polysaccharide. The results of this study could also provide a theoretical basis for the coupling of ultrasonic extraction and ultrasonic concentration process to develop the integrated equipment of both ultrasonic extraction and ultrasonic concentration.

scholarly journals Pressurized Hot Water Extraction of Okra Seeds Reveals Antioxidant, Antidiabetic and Vasoprotective Activities

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1645
Author(s):  
Eng Shi Ong ◽  
Christina Liu Ying Oh ◽  
Joseph Choon Wee Tan ◽  
Su Yi Foo ◽  
Chen Huei Leo
Keyword(s):  
Biological Activities ◽  
Vascular Inflammation ◽  
Single Step ◽  
Polyphenolic Compounds ◽  
Hot Water ◽  
Water Extraction ◽  
Extraction Temperature ◽  
Hot Water Extraction ◽  
Pressurized Hot Water Extraction ◽  
Different Parts

Abelmoschus esculentus L. Moench (okra) is a commonly consumed vegetable that consists of the seeds and peel component which are rich in polyphenolic compounds. The aim of this study is to utilize pressurized hot water extraction (PHWE) for the extraction of bioactive phytochemicals from different parts of okra. A single step PHWE was performed at various temperatures (60 °C, 80 °C, 100 °C and 120 °C) to determine which extraction temperature exhibits the optimum phytochemical profile, antioxidant and antidiabetic activities. The optimum temperature for PHWE extraction was determined at 80 °C and the biological activities of the different parts of okra (Inner Skin, Outer Skin and Seeds) were characterized using antioxidant (DPPH and ABTS), α-glucosidase and vasoprotective assays. Using PHWE, the different parts of okra displayed distinct phytochemical profiles, which consist of primarily polyphenolic compounds. The okra Seeds were shown to have the most antioxidant capacity and antidiabetic effects compared to other okra parts, likely to be attributed to their higher levels of polyphenolic compounds. Similarly, okra Seeds also reduced vascular inflammation by downregulating TNFα-stimulated VCAM-1 and SELE expression. Furthermore, metabolite profiling by LC/MS also provided evidence of the cytoprotective effect of okra Seeds in endothelial cells. Therefore, the use of PHWE may be an alternative approach for the environmentally friendly extraction and evaluation of plant extracts for functional food applications.

scholarly journals The Effect of Temperature on Pressurised Hot Water Extraction of Pharmacologically Important Metabolites as Analysed by UPLC-qTOF-MS and PCA

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
B. S. Khoza ◽  
L. Chimuka ◽  
E. Mukwevho ◽  
P. A. Steenkamp ◽  
N. E. Madala
Keyword(s):  
Antioxidant Activities ◽  
Pure Water ◽  
Principal Component ◽  
Extraction Process ◽  
Extraction Methods ◽  
Hot Water ◽  
Water Extraction ◽  
Effect Of Temperature ◽  
Extraction Temperature ◽  
Hot Water Extraction

Metabolite extraction methods have been shown to be a critical consideration for pharmacometabolomics studies and, as such, optimization and development of new extraction methods are crucial. In the current study, an organic solvent-free method, namely, pressurised hot water extraction (PHWE), was used to extract pharmacologically important metabolites from driedMoringa oleiferaleaves. Here, the temperature of the extraction solvent (pure water) was altered while keeping other factors constant using a homemade PHWE system. Samples extracted at different temperatures (50, 100, and 150°C) were assayed for antioxidant activities and the effect of the temperature on the extraction process was evaluated. The samples were further analysed by mass spectrometry to elucidate their metabolite compositions. Principal component analysis (PCA) evaluation of the UPLC-MS data showed distinctive differential metabolite patterns. Here, temperature changes during PHWE were shown to affect the levels of metabolites with known pharmacological activities, such as chlorogenic acids and flavonoids. Our overall findings suggest that, if not well optimised, the extraction temperature could compromise the “pharmacological potency” of the extracts. The use of MS in combination with PCA was furthermore shown to be an excellent approach to evaluate the quality and content of pharmacologically important extracts.

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