scholarly journals DEVELOPMENT OF TECHNOLOGY FOR PRODUCTION OF SUBSTANCE SILECBINE ON THE BASIS OF EC-DYSTEROIDS OF THE AERIAL PARTS OF SILENE BRAHUICA

2021 ◽  
pp. 319-327
Author(s):  
Ravshanjon Muratjanovich Khalilov ◽  
Mohira Rakhimovna Yakubova
Keyword(s):  
Particle Size ◽  
Microcrystalline Cellulose ◽  
Water Solution ◽  
Liquid Extraction ◽  
Raw Material ◽  
Process Temperature ◽  
Mass Ratio ◽  
Aerial Parts ◽  
Liquid Liquid Extraction ◽  
Plant Substances

The process extraction of ecdysterone from the aerial parts of Silene brahuica was studied. On the basis results research, the following extraction conditions were established: extractant – 90% ethanol, particle size of raw material – no more than 5 mm and process temperature – 20–30 °C. A five-fold extraction of ecdysterone from the aerial parts of Silene brahuica is proposed. To purify of the extract, a sequential liquid-liquid extraction is proposed, according to which the concentrated extract is diluted with water and treated three times with extraction petrol to remove hydrophobic impurities, then extracted six times with butanol to remove hydrophilic impurities. For effective drying of the silekbin substance, a filler was used, as which microcrystalline cellulose was selected in a mass ratio of 1 : 2 to the dry residue of the dried water solution. The technology of obtaining the substance of the adaptogenic and immunostimulating drug "Silekbin" from the aerial parts of Silene brahuica, which is tested on semi-industrial installations of the Pilot production of the Institute of the Chemistry of Plant Substances, has been developed.

Recovery of Niobium and Tantalum by Solvent Extraction from Penouta Sn–Ta–Nb Deposit

2020 ◽  
Author(s):  
Olga Rodríguez ◽  
Francisco J. Alguacil ◽  
Esther Escudero Baquero ◽  
Irene García-Díaz ◽  
Félix A. López
Keyword(s):  
Solvent Extraction ◽  
Aqueous Solutions ◽  
Acid Leaching ◽  
Liquid Extraction ◽  
Raw Material ◽  
Real Solutions ◽  
Mining Tailings ◽  
Liquid Liquid Extraction

This work presented data using always real solutions yielded from the treatment of Spanish raw material, in detail, from a slag obtained in a pyrometallurgy process of tin production from mining tailings containing mainly cassiterite and columbo tantalite. In this investigation the raw material was treated by acid leaching, using HF/H2SO4 as a leaching agent. Then, liquid-liquid extraction of Nb and Ta have performed with Cyanex®923 extractant, further, both metals were separately stripped. Once metals were separated into two aqueous solutions, they were precipitated and calcined to yield the corresponding compounds (Nb2O5 of 98.5% purity and Ta2O5 of 97.3% purity).

Study on Compound Cross-Flow Liquid-Liquid Extraction for Separating Methylal-Methanol Azeotropic System

2011 ◽  
Vol 130-134 ◽  
pp. 450-453 ◽  
Author(s):  
Jun Lin ◽  
Qun Qun Huang ◽  
Jing Jing Zhu ◽  
Zheng Gui Gu
Keyword(s):  
Energy Consumption ◽  
Lower Energy ◽  
New Technology ◽  
Cross Flow ◽  
Liquid Extraction ◽  
Azeotropic Mixture ◽  
Raw Material ◽  
Recovery Ratio ◽  
Two Stage ◽  
Liquid Liquid Extraction

Aiming at the raw material of a methylal-methanol azeotropic mixture (including 91.8% of methylal, 8.2% of methanol), With a certain proportion of the composite solvent as extracting agent, over 99.5% purity of methylal can be obtained with two-stage cross-flow liquid-liquid extraction combining distillation operation, while the compound extracting agent can be recycled. Compared with the traditional methods, the new technology has more obvious methanol removing effect, higher product purity, higher recovery ratio (>95%), and lower energy consumption. It’s a new feasible scheme to Separate methylal-methanol azeotropic system.

scholarly journals THE DEVELOPMENT OF TECHNOLOGY FOR OBTAINING OF TENESTROL SUBSTANCE OF ESTROGENIC AC-TION FROM THE AERIAL PARTS OF FERULA TENUISECTA

2019 ◽  
pp. 269-276
Author(s):  
Мунирахон (Munirakhon) Ахматхон кизи (Ahmatkhon kizi) Маматханова (Mamatkhanova) ◽  
Равшанжон (Ravshanzhon) Муратджанович (Muratdzhanovich) Халилов (Khalilov) ◽  
Любовь (Lyubov') Дмитриевна (Dmitrievna) Котенко (Kotenko) ◽  
Ахматхон (Ahmatkhon) Умарханович (Umaralievich) Маматханов (Mamatkhanov)
Keyword(s):  
Aerial Part ◽  
Raw Materials ◽  
Water Solution ◽  
Weight Ratio ◽  
Volume Ratio ◽  
Raw Material ◽  
Alcohol Extract ◽  
Aerial Parts ◽  
Green Coloration ◽  
Water Alcohol

Extraction of the sum of esters of the sesquiterpene alcohols from the aerial part of Ferula tenuisecta and purification of obtained extract were studied, allowing in following to get the final substance without green coloration. It was determined the optimum adsorbent – actuated coal and its amount for removing the green coloration of water-alcohol extract from used raw materials. It was found that for the purification of the bottoms of water-alcohol extract, five-fold treatment with extractive petrol in a volume ratio of water solution – solvent 2:1 is necessary, and for extraction esters from a purified water solution – three-fold extraction with ethyl acetate in a volume ratio of water solution – solvent 2:1. It was used a filler to effective drying the substance of Tenestrol. The microcrystalline cellulose in a weight ratio from 1:8 to 1:10 to the raw material was chosen as the optimum filler. Technology for obtain of substance of esters of sesquiterpene alcohols with estrogenic action from the aerial part of Ferula tenuisecta was developed and called “Tenestrol”. From this technology substance "Tenestrol" with yield of 3.8% by weight of the raw material is obtained, which contains not less 20% of the esters.

scholarly journals Extraction of essential oil from the aerial parts of Artemisia frigida Willd by way of hydrodistillation

2020 ◽  
pp. 25-30
Author(s):  
Saranchimeg Borchuluun ◽  
Qinghu Wang ◽  
Junsheng Hao
Keyword(s):  
Particle Size ◽  
Essential Oil ◽  
Plant Material ◽  
Raw Material ◽  
Extraction Time ◽  
Single Factor ◽  
Soaking Time ◽  
Solid Ratio ◽  
Aerial Parts ◽  
Artemisia Frigida

This study aims to determine the optimum conditions for extraction of essential oil compounds in the aerial parts of Artemisia frigida Willd. Method: the considered extraction method is hydro-distillation, using a Clevenger apparatus. The effect of particle size of raw material, soaking time, liquid to plant material ratio and extraction time on essential oil yield were investigated through both single factor and multi-factor experiments. Results: In the single factor experiment, the influences of the following factors on essential oil extraction were studied; particle size 0.825 mm, soaking time 2 h, and liquid to plant material ratio 12:1. Under the multi-factor experiment, the influences of multiple factors of extraction conditions on essential oil were considered, particularly, extraction time (C)>soaking time (A)>liquid to plant material ratio. Conclusion: For extraction of essential oil from the aerial parts of Artemisia frigida Willd, the following optimum extraction parameters were identified: 2h of soaking time, 10:1 liquid to solid ratio, and 8h of extraction time.

Preparation of ZnNb2O6 Powders by Molten Salt Method

2011 ◽  
Vol 412 ◽  
pp. 94-98
Author(s):  
Dai Bing Zhang ◽  
Guo You Gan ◽  
Ji Kang Yan ◽  
Zhong Wen Chen ◽  
Jing Hong Du ◽  
...  
Keyword(s):  
Particle Size ◽  
Molten Salt ◽  
Solid Phase ◽  
Raw Material ◽  
Narrow Particle Size Distribution ◽  
Phase Method ◽  
Molten Salt Method ◽  
Mass Ratio ◽  
Solid Phase Method ◽  
Special Direction

ZnNb2O6powders were prepared by solid phase method and molten salt method. KCl-NaCl-ZnCl2was used as molten salt. The mass ratio of molten salt and raw material is 1:1. Pure ZnNb2O6powders were synthesized by molten salt method? at 650°C, which was reduced by 200°C relative to solid phase method. ZnNb2O6powders preferably grow along special direction, and appear strip or rod like. ZnNb2O6powders calcined at 650°C have narrow particle size distribution. Median size D50 =5.31μm. With the increase of the calcining temperature grain grows and particle size increases.

New extraction method for radioimmunoassay of serum estradiol.

1981 ◽  
Vol 27 (11) ◽  
pp. 1926-1928 ◽  
Author(s):  
P B Eriksen
Keyword(s):  
Extraction Method ◽  
Water Solution ◽  
Extraction Procedure ◽  
Liquid Extraction ◽  
Serum Estradiol ◽  
Lipophilic Compound ◽  
Liquid Liquid Extraction ◽  
Coefficients Of Variation ◽  
Materials Used ◽  
Cost Of Materials

Abstract A new extraction procedure is applied here to radioimmunoassay of serum estradiol. Small columns packed with porous, grainy kieselguhr are loaded with the samples. The kieselguhr material acts as support for the water phase, from which the lipophilic compound estradiol is eluted with diethyl ether. With use of a specially constructed rack, several columns can be handled simultaneously, which makes the procedure convenient for routine use: 40 columns can be processed in about 30 min, including application of samples, elution, and evaporation of solvent. The results correlate well (r = 0.98) with those by conventional liquid-liquid extraction, and the new method has lower interassay coefficients of variation. When tritiated estradiol in water solution was applied onto the columns, 97.7% was recovered in the extract. The current cost of materials used for the extraction is about $0.20 per column.

Extraction of phytosterols from tall oil soap using selected organic solvents

2011 ◽  
Vol 65 (6) ◽  
Author(s):  
Milena Rousková ◽  
Aleš Heyberger ◽  
Jan Tříska ◽  
Miroslav Krtička
Keyword(s):  
Organic Solvent ◽  
Waste Product ◽  
Industrial Applications ◽  
Liquid Extraction ◽  
Raw Material ◽  
Tall Oil ◽  
Cellulose Production ◽  
Liquid Liquid Extraction ◽  
High Boiling Point ◽  
Extraction Solvents

AbstractTall oil soap as a waste product of the sulphate cellulose production process was treated by single-stage liquid-liquid extraction. The aim of this study was to compare yields of health beneficial matters contained in tall oil soap when several extraction solvents, recommended in literature, were used. Hexane, 1-methyl-4-(1-methylethenyl)-cyclohexene, 2-methylpropan-1-ol, hexan-1-ol, 4-methylpentan-2-one, 2-methoxy-2-methylpropane, and butyl ethanoate were tested. For hydrocarbons it was necessary to add a de-emulsifier into the system, which limits the formation of foams and stable emulsions. The highest yields of total phytosterols (78 %) and especially of β-sitosterol (100 %) were reached when butyl ethanoate was used. However, it was necessary to adjust pH of the treated raw material to approximately 7. The highest yields for feed where pH was not adjusted were obtained with 2-methylpropan-1-ol: 67 % of total sterols and 89 % of β-sitosterol. Disadvantages of most of the tested solvents included the formation of the undesirable solid interphase which could not be removed, partial solubility of the solvents in the water phase, their high boiling point and/or instability. These disadvantages prevent the use of these solvents in industrial applications; they also complicate the treatment of tall oil soap by liquid-liquid extraction or the regeneration of the used organic solvent.

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