Preparation and Some Physicochemical Properties of Water–Surfactant–Halohydrocarbon Microemulsions Suitable for the Creation of Combined Fire Extinguishing Agents

2020 ◽  
Vol 90 (9) ◽  
pp. 1766-1776
Author(s):  
D. V. Batov
CrystEngComm ◽  
2018 ◽  
Vol 20 (24) ◽  
pp. 3428-3434
Author(s):  
Colin C. Seaton ◽  
Rayan R. Thomas ◽  
Eman A. A. Essifaow ◽  
Elisa Nauha ◽  
Tasnim Munshi ◽  
...  

The creation of salts is a frequently used approach to modify physicochemical properties of active pharmaceutical ingredients. This work prepares a collection of sulfathiazole salts to probe the influence of counterion structure on crystal packing.


2021 ◽  
Vol 937 (2) ◽  
pp. 022089
Author(s):  
A K Mazitova ◽  
G K Aminova ◽  
I I Zaripov ◽  
M S Klyavlin ◽  
I N Vikhareva

Abstract Polyvinyl chloride compositions are very popular in the cable industry. The range of domestic fireproof cable PVC plastics is limited to several manufactured brands that were developed more than 30 years ago and do not meet modern international standards. The creation of new environmentally friendly formulations of fireproof cable plastics with improved operational properties is an urgent task. This paper describes a method of synthesizing a novel ester compound of phenyl dixylenyl phosphate. The conditions for its production with maximum yield are selected. Physicochemical properties of the new flame retardant are studied. A non-toxic biodegradable PVC composition based on a plasticizer of dibutoxyethyl adipate and a novel flame retardant is formulated. The results of tests of the developed PVC-composite on the main indicators for cable products of the I40-13 brand are presented.


2021 ◽  
Vol 137 (6) ◽  
pp. 16-19
Author(s):  
N. R. Mikhailets ◽  
◽  
S. A. Sinitsin ◽  
E. A. Danilov ◽  
◽  
...  

The article emphasizes the relevance and expediency of developments for the creation of petroleum pitch and the introduction of thermal polycondensation processes in Russia. The possibility of producing petroleum pitches from vacuum-distilled cracking residue is considered. It is shown that to obtain a petroleum pitch suitable for carbon materials, it is necessary to carry out the process of thermal polycondensation in two stages: at elevated pressure, and then at reduced pressure. The physicochemical properties of the obtained petroleum pitches and intermediate products of the process have been investigated. The possibility of obtaining petroleum pitches with a yield of 35-38% wt. from the vacuum distilled cracking residue at the thermal polycondensation unit.


2020 ◽  
pp. 82-89
Author(s):  
Владимир Иванович Логинов ◽  
Евгений Сергеевич Михайлов

Анализ тушения пожаров на химически опасных объектах показывает, что для обеспечения комплексной надежной защиты человека необходим широкий ассортимент специальной защитной одежды изолирующего типа (СЗО ИТ) для различных условий эксплуатации. Одним из возможных путей его быстрого создания является разработка конструктивно-унифицированных рядов (КУР) таких изделий. Сформирован подход к созданию КУР термоагрессивостойких костюмов (ТАСК) для пожарных, в основе которого лежит блочно-модульный принцип, когда, используя базовое изделие, готовят последующие его модификации с различными характеристиками. Конструктивно-унифицированный подход к созданию модельного ряда ТАСК позволяет поддерживать характеристики изделия на требуемом уровне без серьезных конструктивных изменений, только совершенствуя технологии, материалы, в соответствии с условиями эксплуатации и требованиями заказчиков. Analysis of fire extinguishing at chemically hazardous facilities shows that to provide comprehensive, reliable human protection, a wide range of special protective clothing of the insulating type (SPC IT) is necessary for various operating conditions. One of the possible ways of its creation is the development of structurally unified series (SUS) of such products. There is developed an approach to create a SUS of heat and environment resistant suits (HERS) for firefighters. The creation of a series of products is based on a block-modular principle i.e. on the base of the basic model there are created subsequent modifications with different characteristics. Studies have shown that as an optimal base model for SUS HERS can be HERS produced by AO “PTS”. On the basis of the existing basic model there were carried out researches and design works to develop a wide range of heat and environment resistant suits for various working conditions, which increase the performance efficiency for every suit type. This principle, if necessary, allows to replace some components of personal protective equipment for different tasks. The design-unified approach to the creation of HERS model range allows to keep the product characteristics at the required level without major structural changes, only by improving technologies, materials in accordance with the operating conditions and customer requirements. At the same time, there are eliminated difficulties when operating HERS, included in SUS, in fire departments of various types, in particular, when using, washing, dry cleaning, drying, storage. The organizational and technical system of HERS operation is being improved, including such components as training and the procedure of operation accounting, service life, terms of repair, write-off and replacement of components as well as restoration of protective properties while operating and repair engineering.


2021 ◽  
pp. 71-78
Author(s):  
Александр Иванович Пичугин ◽  
Владимир Иванович Старцев ◽  
Дмитрий Генрихович Мичудо ◽  
Николай Владимирович Навценя

Рассмотрены основные концептуальные направления создания пожарных автомобилей первой помощи (АПП). Проанализирован проведенный управленческий эксперимент с использованием АПП в рамках обсуждения в 2003 году на совещании-семинаре по теме «О результатах эксперимента по применению новых технологий пожаротушения с целью определения оптимальных решений по их применению». Сформулирован ряд замечаний по конструкции и функциональным возможностям эксплуатации этого типа ПА. Приведен рейтинг потребности АПП с учетом вместимости их цистерны для воды. Представлены данные из литературных источников, отражающие направления их создания и эксплуатации. The main conceptual directions in the creation of first aid fire trucks (APP) are considered. The standards for their creation and testing are presented. The importance of the presence of first aid in the fleet of fire trucks (PA), taking into account adaptation to operating conditions, is shown. The data on conducting a management experiment using the APP are presented as part of a discussion in 2003 at a meeting-seminar on the topic “On the results of an experiment on the use of new fire extinguishing technologies in order to determine optimal solutions for their application”. A number of remarks on the design and functionality of this type PA are made. The need rating in APP is given, taking into account the capacity of their water tank. Data from literature sources reflecting the directions of their creation and operation are presented.


2020 ◽  
Vol 12 (4) ◽  
pp. 290-295
Author(s):  
V. V. Nikiforov ◽  
M. V. Aleshkov ◽  
I. A. Gusev

Fires and accidents at nuclear power facilities that occurred in the past resulted in considerable property damage, both direct and indirect one. The emerging threats had a negative impact on the fire-fighting process that had to be interrupted, which contributed to spreading of fire. One way of solving the problem is to develop and use robotics, and in order to achieve the effectiveness of robotics equipment, this must be designed taking into account the specifics of the facility, where it is planned to be used, and operate throughout the plant premises, while being of the light class. Having analyzed the peculiarities of origination and development of fires at NPPs, as well as taking into account the specifics of the facility, technical requirements for the design of the robotic equipment were developed, which formed the basis for the creation of a prototype implemented in a mobile robotic fire-fighting unit (MRUP). In order to check the stated tactical and technical characteristics, MRUP was subjected to tests for its running performance, operability of its components and assemblies, and fire-extinguishing properties. The test of running performance was carried out on dedicated stands with a variety of inclined surfaces, climbing angles and heights. For MRUP firefighting efficiency to be tested, a model hotspot was extinguished, the range of delivery and the consumption of fire-extinguishing agents were measured.


2020 ◽  
Vol 43 ◽  
Author(s):  
Stefen Beeler-Duden ◽  
Meltem Yucel ◽  
Amrisha Vaish

Abstract Tomasello offers a compelling account of the emergence of humans’ sense of obligation. We suggest that more needs to be said about the role of affect in the creation of obligations. We also argue that positive emotions such as gratitude evolved to encourage individuals to fulfill cooperative obligations without the negative quality that Tomasello proposes is inherent in obligations.


Author(s):  
A. Legrouri

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.


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