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Nikita Yazikov Faculty: "Ecology and chemical technology" Profession: "Equipment of chemical industry and enterprises of building materials"
The Subject of the exhaust work:
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| Русский язык | Українська мова | English language |
| DonNTU |
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Portal of masters DonNTU |
| Autobiography |
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Contents
Purpose and tasks Topicality of work Scientific novelty Planned practical results Review of topic research and development Chemical method Conclusion Literature References on the internet sources | ||||||||
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The abstract |
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| Purpose and tasks | ||||||||
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The purpose of the work is an identification of kinetic regularities of reaction of neutral hydrolysis of some sulphochlorides anilids sulphoacids in water-organic medium depending on temperature and structure features of substrate. |
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| Topicality of work | ||||||||
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The problem of utilization of industrial sewage and its cleaning from toxicants is one of the most important problems of ecology. Being one of the most widespread toxic pollutants, phenols are important and deficit components of organic synthesis. Therefore, it is more profitable to extract phenols or regenerate them in low-toxic products which can find further application, but not to suppress them by destruction by means of biochemical oxidization, thermal decomposition, etc. |
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| Scientific novelty | ||||||||
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The scientific novelty of work consists in synthesis of new derivatives of aromatic sulphochlorides, research of their reactivity at the nucleophilic substitution, finding out a rare case of presence of area of isokinetic temperature in the working range, offering variant of practical realization of method of chemical cleaning of sewage. |
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| Planned practical results | ||||||||
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As a result of work it is planned to develop and prove technique and technology for carrying out the process of cleaning of sewage of by-product coke plants by means of chemical method. It is planned in the future to patent the scheme and devices, as well as industrial testing and manufacturing application. |
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| Review of topic research and development | ||||||||
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Phenols are one of the widespread toxic pollutants of sewage of chemical production. Basic sources of phenol contamination of natural water are by-product coke plants, shaleremaking, wood-chemical enterprises, production of phenolphthalein, phenolformaldehyde resins, salicylic acid and salol, enterprises of petrochemistry. Extraction, steamcirculation, adsorbtion and biochemical methods are frequently used for dephenolizing of industrial sewage. It should be noted that phenols are important and scarce raw materials of organic synthesis the same time. It is not economically expedient to utilize them [1,2].
Chemical method
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The existing methods of dephenolizing have many limitations in their application and do not always provide a required degree of cleaning. They are also very expensive [3]. Therefore, the chemical method of cleaning is considered to be perspective. • Reduction of water, steam and electricity volumes expended for dephenolizing. • Carrying out dephenolizing by any concentrations of phenol with the given degree of cleaning. • A presence of ammonia in water as a catalyst. • Reduction of production area because of combination of two processes in one department. • Finished goods of dephenolizing are commodity products. • Sulphonates, useful products of the method can be used for softening of technical water and diminishing of scale. • Easiness of division of cleared water from the products of dephenolizing. Disadvantages: • High cost of initial sulphochlorides. • Necessity of application of corrosive resistant equipment. • Flowing of side processes of hydrolysis of sulphochlorides.
Conclusion
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1. The synthesis of new derivatives of aromatic sulphochlorides analids of sulphoacids was conducted. |
2. The kinetic of neutral hydrolysis of obtained substrates in water-organic solvent depending on temperature and structure features of fragments of molecule was investigated. 3. It was displayed that the relatively low reactionary in conditions of neutral hydrolysis enables the use of sulphochlorides anilids of sulpoacids for dephenolizing swages.
Literature
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1. Рублева Л.И., Попова Л.А. Фениларенсульфонаты - продукты химической очистки фенолсодержащих промстоков: реакционность и применение// Збірка доповідей II Міжнародної наукової конференції аспірантів та студентів "Охорона навколишнього середовища та раціональне використання природних ресурсів", том 1, Донецк: 2003 - С. 35-36. |
2. Языков Н.А., Рублева Л.И., Левандовский В.Ю. Эффекты структуры субстрата при гидролизе сульфохлоридов анилидов сульфокислот – химических агентов дефеноляции в водноорганических средах // Збірка доповідей VI Міжнародної наукової конференції аспірантів та студентів "Охорона навколишнього середовища та раціональне використання природних ресурсів", том 1, Донецк: 2005 - С. 126-127. 3. Лейбович Р.Е. Технология коксохимического производства. М.: Металлургия, 1982. - 360с. 4. Языков Н.А., Рублева Л.И., Левандовский В.Ю. Установка промышленной очистки фенолсодержащих сточных вод// Збірка доповідей VII Міжнародної наукової конференції аспірантів та студентів "Охорона навколишнього середовища та раціональне використання природних ресурсів", том 1, Донецк: 2006 - С. 126-127. 5.Мысык Д.Д., Бурмистров С.И.// Журн. орган. химии. – 1967.-Т.3. – С.1667–1669. 6.Алексеев В. Н. Количественный анализ. – М.: Просвещение, 1974.- 505 с. 7. Мысык Д.Д., Рублева Л.И., Крутько И.Н., Левандовский В.Ю. Влияние структуры N-аренсульфонильного фрагмента на реакционность сульфохлоридов анилидов сульфокислот в условиях нейтрального гидролиза//Вопросы химии и химической технологии.-2004.- № 4.- С.39-42 8. Рублева Л.И., Максименко Н.Н. VII. Общая математическая модель каталитического сульфонилирования фенола// Журнал органической химии. – 2000. – т.36, вып.9.- С. 1338 – 1340. 9. Визгерт Р.В., Максименко Н.Н., Рублева Л.И. Особенности реакционной способности стерически затрудненных ароматических сульфохлоридов в реакциях нуклеофильного замещения// Укр. хим. журнал, 1993. – Т.59, №11.- С. 1219 – 1230. 10. Шмид Р., Сапунов В.Н. Неформальная кинетика. В поисках путей химических реакций. – М.: Мир, 1985. – 264 с.
References on the internet sources
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© ДонНТУ 2009 Языков Н.А. |