Membranes Based on Polyalkylmethylsiloxanes for Selective Removal of C5 and C6 Alcohol from Water

2019 ◽  
Vol 816 ◽  
pp. 228-232
Author(s):  
E.A. Grushevenko ◽  
I.A. Podtynnikov ◽  
A.A. Knyazeva ◽  
O.A. Sharova ◽  
Tatyana S. Anokhina ◽  
...  
Keyword(s):  
Chemical Industry ◽  
Competitive Ability ◽  
Selective Removal ◽  
Sorption Properties ◽  
Membrane Material ◽  
New Generation

Removal oxygenates from wastewater is an important problem of lots of chemical industry. At last decade pervaporation makes a good competitive ability to traditional water-oxygenates separation methods. The goal of this work is to find a new generation of membrane material that can provide increased selectivity oxygenate separation in an example of 1-pentanol and 1-hexanol from the water. In this work were studied following polymers: polyhexylmethylsiloxane, polyheptylmethylsiloxane, and polyoctylmethylsiloxane in comparison with the material, which is wildly used in hydrophobic pervaporation – polydimethylsiloxane. The sorption properties of these polymers were studied and direct correlation sorption and pervaporation properties were demonstrated. It was found that polyheptylmethylsiloxane has higher selectivity than other study polymers: 22 – hexanol/water, 7.3 – pentanol/water.

scholarly journals Oxidization resistance and sorption properties of oleogels as new-generation fatty systems

2021 ◽  
pp. 89-95
Author(s):  
P.О. Nekrasov ◽  
◽  
N.A. Tkachenko ◽  
О.P. Nekrasov ◽  
О.M. Gudz ◽  
...  
Keyword(s):  
Sunflower Seed ◽  
Three Dimensional ◽  
Scientific Basis ◽  
Tocopherol Content ◽  
Sorption Properties ◽  
Dimensional Structure ◽  
Dispersed Phase ◽  
Technological Parameters ◽  
High Oleic Sunflower Oil ◽  
New Generation

Fats as complex mixtures of acylglycerols with lipid and non-lipid substances are an integral part of human nutrition. The presence of acylglycerols of trans-isomers of fatty acids causes many cardiovascular diseases and metabolic disorders. A promising approach to solving the problem of minimizing the content of these undesirable compounds in food recipes is to create a new generation of fat systems, oleogels, which are the subject of this study. High-oleic sunflower oil was used as a dispersion medium of oleogels, which allows obtaining systems with increased resistance to oxidation, as opposed to the oils of traditional kinds. Sunflower seed wax and tocopherols are chosen as a dispersed phase of these fatty systems. The choice of these components was based on their properties to create a three-dimensional structure in oleogels with specified thermomechanical characteristics. Currently, there is a lack of information on the influence of the content of the dispersed phase on the technological parameters of oleogels, namely oxidative resistance and sorption properties. The purpose of the presented work was to study these features of oleogels and establish their dependences on their composition. To solve this problem, the yield surface method is used in the work. The unknown values of the parameter vector were determined by using regression analysis algorithms. Deviation functionality was minimized by finding the appropriate combinations of the experimental series of predictors. A mathematical model was developed which allows predicting oxidative stability and sorption properties of oleogels based on the data on their composition. The suitable mass fractions of the components of the dispersed phase of oleogels have been determined as follows: tocopherol content is 0.10–0.14 wt.% and the sunflower seed wax content is 1.8–4.0 wt.%. The results obtained can serve as a scientific basis for the development of technology for the industrial production of oleogels as new generation fatty systems.

scholarly journals Toxic Gas Sewage System

2019 ◽  
Vol 9 (2S4) ◽  
pp. 578-581
Keyword(s):  
Artificial Intelligence ◽  
Chemical Industry ◽  
Human Action ◽  
Gas Detection ◽  
Action Mechanism ◽  
Sewer System ◽  
Work Mechanism ◽  
Remote Controller ◽  
Area Unit ◽  
New Generation

The robots area unit is currently used for various functions that transform the work of humans. The Wireless Human Action Mechanism can be filed in a new generation of artificial intelligence, while researching the area unit commands, so that these robots can improve their maneuverability and effectiveness in those areas. The gas detection work mechanism may be a new generation of robots that address the problems of the sewer system and make it easier to detect hazardous gas in the battlefield, the chemical industry, and coal mining. Wirelessly controlled robotics vehicles are coupled with two sensors and a camera, which allows you to capture careful video of the environment in one setting. Used in the GSM robot, this helps to send the details around the system. This type of robot is controlled by a remote controller, which facilitates the robot's movement across terrain

scholarly journals Heterogeneous Catalysis Under Flow for the 21st Century Fine Chemical Industry

2019 ◽  
Author(s):  
Rosaria Ciriminna ◽  
Mario Pagliaro ◽  
Rafael Luque
Keyword(s):  
Chemical Industry ◽  
Flow Chemistry ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Single Atom ◽  
Catalyst Stability ◽  
Supported Metal Catalysts ◽  
Fine Chemical ◽  
Pharmaceutical Ingredients ◽  
New Generation

Due to metal leaching and poor catalyst stability, the chemical industry’s fine chemical and pharmaceutical sectors have been historically reluctant to use supported transition metal catalysts to manufacture fine chemicals and active pharmaceutical ingredients. With the advent of new generation supported metal catalysts and flow chemistry, we argue in this study, this situation is poised to quickly change. Alongside heterogenized metal nanoparticles, both single-site molecular and single-atom catalyst will become ubiquitous. This study offers a critical outlook taking into account both technical and economic aspects.

MICROBIAL POLYSACCHARIDES – THE BASIS FOR NEW GENERATION POLYFUNCTIONAL MATERIALS

2021 ◽  
Vol 1 (19) ◽  
pp. 284-286
Author(s):  
V.V. Revin ◽  
E.V. Liyaskina ◽  
N.A. Pestov ◽  
D.A. Kadimaliev ◽  
A.B. Dolganov
Keyword(s):  
Thermal Conductivity ◽  
Bacterial Cellulose ◽  
Sorption Properties ◽  
High Noise ◽  
Low Thermal Conductivity ◽  
New Generation

New generation polyfunctional materials based on such microbial polysaccharides as bacterial cellulose, alginate, xanthan, chitosan have been obtained. The possibility of their application as materials with antibacterial, regenerative and haemostatic properties, ultra-low thermal conductivity, density, high noise-absorbing and sorption properties has been shown.

The study of immersion water heating to ensure the creation of new generation pilot water heating devices

2019 ◽  
Vol 5 (3) ◽  
pp. 10-24 ◽  
Author(s):  
Valery I. Gurov ◽  
Vladimir V. Kurnosov ◽  
Alexander I. Lanshin ◽  
Evgeny D. Sverdlov ◽  
Dmitry A. Skibin
Keyword(s):  
Heat Exchangers ◽  
Competitive Ability ◽  
Test Results ◽  
Water Heating ◽  
Technical Parameters ◽  
Water Heaters ◽  
Harmful Emissions ◽  
Technical Solutions ◽  
New Generation ◽  
Propane Butane

This article explains the concept of immersion water heaters and presents their improvement history with references to the main patented technical solutions. The authors provide the test results of various designs of immersion heaters (with capacity of 50 to 100 kW) when working on propane-butane gas and natural gas. The study estimates the received technical parameters and the level of competitive ability of the immersion heaters, which allow speaking about their application prospects. Based on the presented materials, the authors speak for creating a new generation boiler (without the heat exchangers) with a higher level of efficiency (up to 98%) and low indices of harmful emissions of nitrogen and carbon oxides.

Performance improvement of a large capacity Roots blower based on profile modification

2020 ◽  
pp. 095440622095317
Author(s):  
Linfen Xing ◽  
Jianmei Feng ◽  
Hao Tang ◽  
Xueyuan Peng
Keyword(s):  
Fluid Dynamics ◽  
Experimental Data ◽  
Performance Improvement ◽  
Chemical Industry ◽  
Cfd Model ◽  
Profile Modification ◽  
Previous Generation ◽  
Flow Capacity ◽  
Profile Optimization ◽  
New Generation

Roots blowers are widely used in various fields, and their performances are extremely important for their application in the chemical industry. In this study, a Roots blower with a flow capacity of 90 m3/min was investigated using a computation fluid dynamics (CFD) approach, with emphasis on its performance. A previous-generation blower comprising two lobes was simulated, and the calculated volumetric efficiencies were compared with experimental data. After validating the CFD model, the performance of a Roots blower with two to six lobes was predicted. The effect of the sealing angle at the tip of the profile on the performance of the blower was also investigated. An optimized profile with three lobes and a sealing angle of 4° was selected. A new-generation Roots blower with the same capacity as that of the previous-generation was manufactured and tested. The volumetric efficiency improvements of 12.1%–18.2% could be achieved by profile optimization.

scholarly journals Sorption properties of suspension ointment with incorporated natural anionic polysaccharides

2020 ◽  
Vol 63 (8) ◽  
pp. 24-30
Author(s):  
Ekaterina A. Trufanova ◽  
◽  
Tatyana V. Tikhonova ◽  
Keyword(s):  
Solid Phase ◽  
Wound Care ◽  
Model Solution ◽  
Sorption Properties ◽  
Surgical Interventions ◽  
Anionic Polysaccharides ◽  
Treatment Of Wounds ◽  
Kappa Carrageenan ◽  
Tissue Trauma ◽  
New Generation

Currently, there is a change in methodologies in the treatment of wounds, as a result of which the share of surgical interventions is reduced and new methods of wound care are introduced using dressings and sorption-application therapy of a new generation. The obtained experimental data on the dissolution of the standard hydrophilic ointment base and the commercial ointment Levomekol® in the Ringer-Locke model solution indicate that in real conditions, the ointment will most likely easily dissolve in physiological fluids, quickly absorb and promote the adhesion of the dressing to the wound. The sorption properties of both individual anionic polysaccharides and their mixtures in various ratios in a Ringer-Locke model solution containing the main exudate cations (Na+, K+, Ca2+) were studied in order to assess the prospects of their use as a solid phase in the development of a suspension ointment with sorption properties. This publication presents the results of the behavior of a suspension ointment with anionic hydrocolloids and a commercial ointment Levomecol® in a Ringer-Locke model solution. It is shown that a mixture of sodium alginate and Kappa-carrageenan in a ratio of 1:2 in the developed suspension ointment retained a significant amount of the model solution (24.5 g/g) in its volume for 24 hours. Increasing the sorption capacity of hydrophilic ointments based on PEO will allow you to Sorb excess exudate, create a microclimate to accelerate healing processes, and reduce tissue trauma when removing the dressing.

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