ЭТЕРИФИКАЦИЯ ЛИМОННОЙ КИСЛОТЫ АЛИФАТИЧЕСКИМИ СПИРТАМИ С2-С5

There is an ever increasing interest in the production and use of bio-based chemical substances for the preparation of polymeric materials designed to obtain children's toys, medical equipment and materials that are in contact with food. Trifunctional esters of citric acid - trialkyl citrates - obtained by esterification of citric acid with aliphatic alcohols C2-C5 are of hazard class 4, good plasticizing ability, compatibility with the polymer, a high flash temperature. Citric acid (global production of 0.85-1 mtpa) is a readily available raw material obtained from the waste of sugar production. The purpose of the study is to develop a model of citric acid esterification with linear alcohols C2-C5 in the presence of homogeneous acidic catalysts for the creation of a domestic technology for the synthesis of plasticizing compositions based on renewable raw materials. The selected catalyst is sulfuric acid. The correlation of reactivity of the aliphatic alcohols C2-C5 with their structure in the esterification of citric acid was studied. Some kinetic parameters (lnk0, Ea) were estimated. Synthesis modes were proposed. The reaction time of the preparation of trialkyl citrates at 96% conversion of citric acid (t = 90 °C) was calculated. Laboratory samples were obtained and tested. Some operational characteristics were determined.Существует постоянно растущий интерес к производству и использованию биовозобновляемых химических веществ в производстве полимерных материалов, предназначенных для получения детских игрушек, медицинского оборудования, находящихся в контакте с пищевыми продуктами. Тризамещенные эфиры лимонной кислоты - триалкилцитраты, получаемые этерификацией лимонной кислоты алифатическими спиртами C2-C5, имеют 4 класс опасности, хорошую пластифицирующую способность, совместимость с полимером, высокую температуру вспышки. Лимонная кислота (объем мирового производства 0.85-1 млн. т/год) является доступным сырьем, получаемым из отходов сахарных производств. Цель исследования - разработка модели этерификации лимонной кислоты линейными спиртами С2-С5 на гомогенных кислотных катализаторах для создания отечественной технологии синтеза пластифицирующих композиций на основе возобновляемого сырья. Выбран катализатор - серная кислота; изучена связь реакционной способности алифатических спиртов С2-С5 с их строением в реакции этерификации лимонной кислоты, оценены некоторые кинетические параметры (lnk0, Eакт), предложены режимы синтеза, рассчитано время реакции получения триалкилцитратов при конверсии лимонной кислоты 96% (t = 90 ºС). Наработаны лабораторные образцы и определены некоторые эксплуатационные характеристики

MODERN TRENDS OF BANKS' IMAGE POLICY

The new stage of the Russian policy and economy development is marked by the urge of our country to become a rightful participant of the world political and economic sphere. The modern trends of world economy put forward the standards of competitiveness, business ethics, culture, production and marketing organization. Besides, under the open borders of the modern economies the Russian consumer also becomes harder-to-please in terms of interaction with the business, and the company image, as a rule, becomes one of the crucial factors of consumer's decision-making

ESTERIFICATION OF CITRIC ACID WITH ALIPHATIC ALCOHOLS С₂-С₅

There is an ever increasing interest in the production and use of bio-based chemical substances for the preparation of polymeric materials designed to obtain children's toys, medical equipment and materials that are in contact with food. Trifunctional esters of citric acid - trialkyl citrates - obtained by esterification of citric acid with aliphatic alcohols C2-C5 are of hazard class 4, good plasticizing ability, compatibility with the polymer, a high flash temperature. Citric acid (global production of 0.85-1 mtpa) is a readily available raw material obtained from the waste of sugar production. The purpose of the study is to develop a model of citric acid esterification with linear alcohols C2-C5 in the presence of homogeneous acidic catalysts for the creation of a domestic technology for the synthesis of plasticizing compositions based on renewable raw materials. The selected catalyst is sulfuric acid. The correlation of reactivity of the aliphatic alcohols C2-C5 with their structure in the esterification of citric acid was studied. Some kinetic parameters (lnk0, Ea) were estimated. Synthesis modes were proposed. The reaction time of the preparation of trialkyl citrates at 96% conversion of citric acid (t = 90 °C) was calculated. Laboratory samples were obtained and tested. Some operational characteristics were determined

The Study of the Chemical Composition of Essential Oils Mentha Piperita L. are Grown in Non-Chernozem Zone of Russia

By gas-liquid chromatography and mass spectrometry has been investigated the composition of essential oils and the change in the ontogenesis and exogenous effects on the plant Mentha piperita L. drugs retardant type. With the introduction of oil crops from the southern regions to the more northern regions of the component composition of the essential oil practically does not change. There are only minor variations in the content of some terpenoids oils. Exogenous preharvest treatment plant growth regulators can in some cases deliberately influence the activity of various terpenoid biosynthesis and increase the content of the most valuable components of the essential oil.Content and composition of EM is largely determined by factors such as age and leaves of plants, as well as different climatic cal, soil and agronomic conditions. Processing plants different phytoregulators also affects the content and composition of oil. Biosynthesis of terpenoids polyenzyme performed in centers, the activity and the nature of which is determined primarily genetic characteristics of plants, in addition, the activity of certain enzymes of these centers is under the control of hormonal balance and changes in ontogeny, as well as under the influence of exogenous factors.It is shown that the formation of the maximum bioefficiency in ontogeny of aromatic plants, it is advisable to use a two-stage technology to grow them. Plants producing terpenoids of essential oils, the initial step is to create the conditions for the formation of the maximum yield of aboveground mass of plants, including the use of synthetic plant growth regulators. In the second stage "biosynthetic" upon the occurrence of the reproductive phase before harvesting plants, we recommend that inhibit the growth of phytoregulators retardant type. In this case, we observe stimulation accumulation in aboveground mass of secondary metabolites. Inhibition of growth in the preharvest period, aromatic plants determines the strategy of production process management and the formation of bio-productivity as an integral function of productivity and high levels of concentration in the feed terpenoids.Exogenous preharvest treatment plant growth regulators allows purposefully influence the activity of the biosynthesis of various terpenoids, increasing the most valuable components of essential oils

The Study of the Chemical Composition of Essential Oils Mentha Piperita L. are Grown in Non-Chernozem Zone of Russia

By gas-liquid chromatography and mass spectrometry has been investigated the composition of essential oils and the change in the ontogenesis and exogenous effects on the plant Mentha piperita L. drugs retardant type. With the introduction of oil crops from the southern regions to the more northern regions of the component composition of the essential oil practically does not change. There are only minor variations in the content of some terpenoids oils. Exogenous preharvest treatment plant growth regulators can in some cases deliberately influence the activity of various terpenoid biosynthesis and increase the content of the most valuable components of the essential oil.Content and composition of EM is largely determined by factors such as age and leaves of plants, as well as different climatic cal, soil and agronomic conditions. Processing plants different phytoregulators also affects the content and composition of oil. Biosynthesis of terpenoids polyenzyme performed in centers, the activity and the nature of which is determined primarily genetic characteristics of plants, in addition, the activity of certain enzymes of these centers is under the control of hormonal balance and changes in ontogeny, as well as under the influence of exogenous factors.It is shown that the formation of the maximum bioefficiency in ontogeny of aromatic plants, it is advisable to use a two-stage technology to grow them. Plants producing terpenoids of essential oils, the initial step is to create the conditions for the formation of the maximum yield of aboveground mass of plants, including the use of synthetic plant growth regulators. In the second stage "biosynthetic" upon the occurrence of the reproductive phase before harvesting plants, we recommend that inhibit the growth of phytoregulators retardant type. In this case, we observe stimulation accumulation in aboveground mass of secondary metabolites. Inhibition of growth in the preharvest period, aromatic plants determines the strategy of production process management and the formation of bio-productivity as an integral function of productivity and high levels of concentration in the feed terpenoids.Exogenous preharvest treatment plant growth regulators allows purposefully influence the activity of the biosynthesis of various terpenoids, increasing the most valuable components of essential oils.</p

Artificial Intelligence as Effective Digital Transformation Legal Means of Business, Management, Economy and Technology

Currently, entrepreneurial and professional activities are being transformed towards digital business, management, economics and technology, which are viewed through the prism of four new technological areas: artificial intelligence, blockchain, cloud technologies and data analytics. Therefore, we will use multidisciplinary approaches that show how digital tools affect all areas of business processes, management and economics. Purpose of the study: to determine the role and importance of artificial intelligence for building an effective model of business, management, economy and technology transformation, business and professional activities in the context of law and society digital transformation. Methods: The methodological basis of this work was general scientific methods of cognition of legal phenomena, such as synthesis, the method of analogy, formal logic and others, as well as specific scientific methods for studying the category of artificial intelligence in the field of entrepreneurial and professional activity. Results and novelty: To achieve the goals of using AI, it can be described as follows: the first step is to use big data, the second is to apply analytics, and the third is forecasting. AI is used to collect and store data for analysis and further forecasting. Companies in IT, marketing, finance, accounting and sales are using AI to become more competitive and efficient