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THE WORK GENERAL CHARACTERISTIC

Urgency of a problem and work general characteristic.

Polyalcohol С26 are substances, the extremely demanded in many branches of the modern chemical, edible, perfumery, medical and fuel industries.

In particular, geksaoly (sorbitol, mannite), pentaoly (xylitol) are widely used in production of PEAHENS, synthetic resins, varnishes, varnishes, redoxon, foodstuff. The lowest polyalcohol (propylene glycol, ethylen glycol) are the major raw materials for production of medical products, liquid fuel, emulsifying agents, PEAHENS, antifreezes, lubricants and solvents, and also for synthesis of polyester fibers and resins.

Now efforts of many scientific personnel are concentrated to working out of new, effective and ecologically safe ways of reception of polyalcohol from a vegetative biomass, first of all, from cellulose. Huge natural iterated stocks of the yielded biopolymer are capable to satisfy completely requirements of the modern industry for polyalcohol that is especially actual with the account of prospect of a gradual exhaustion of stocks of hydrocarbonaceous minerals.

Single-stage hydrogenolysis of cellulose to polyalcohol (one-potprotsess), in the presence of heterogeneous metallic composites is known for a long time, however in the literature practically there are no the researches directed on studying of its physical and chemical bases. It is obvious, that results of such researches can promote increase of efficiency of conversion of cellulose, to become a fundamental basis new, improved techniques of processing of a cellulose biomass in valuable chemicals. The important factor also is efficiency of a used metallic composite. Results of numerous researches show, that the most perspective are the composites containing ruthenium, however a question of an optimum substrate remains while opened. In the yielded dissertational work for cellulose hydrogenolysis it is offered to use Ru-containing composite on the basis of the supersewed polystyrene (Union of Right Forces) showing high activity in processes of hydrogenation and hydrogenolysis.

The circumstances set forth above define an urgency of the researches directed on studying of physical and chemical bases of process of hydrogenolysis of cellulose in the environment of subcritical water in the presence of the Ru-containing composite on the basis of Union of Right Forces.

Work has been executed within the limits of realisation of the scientific and technical designs financed by the Russian Federal Property Fund (grants № 15-38-20345), RNF (the grant 15-13-20015), FTSP
źResearches and workings out in priority directions of development of scientifically - technological complex of Russia on 2014 - 2020╗ (the agreement № 14.586.21.0024).

The work purpose. Work is directed on research of physical and chemical bases of process of hydrogenolysis of microcrystalline cellulose to polyalcohol in the environment of subcritical water with use rutenijsoderzhashchih composites on the basis of the supersewed polystyrene.

For object in view achievement following problems have been solved:

• working out of a technique of synthesis of optimum Ru-containing composites on the basis of a polymeric matrix of the Union of Right Forces possessing high performance in the course of hydrogenolysis of cellulose;

• working out of a technique of hydrogenolysis of microcrystalline cellulose to polyalcohol in a reactor of high pressure in the environment of subcritical water with use of optimum Ru-containing composites;

• research of influence of parametres of process on conversion of cellulose and selectivity on main products of hydrogenolysis and selection of the optimum conditions providing the maximum yield geksaolov;

• carrying out of physical and chemical researches of optimum Ru-containing composites, in particular, methods of low-temperature adsorption of nitrogen, RFES, Ik-spectroscopy, PEM, etc., definition of stability of composites in the conditions of numerous use;

• research of kinetics of process of hydrogenolysis of microcrystalline cellulose in the presence of optimum Ru-containing composites;

• the offer of a hypothesis of the mechanism of passing of reaction of hydrogenolysis of cellulose to polyalcohol, selection of adequate kinetic model and calculation of its parametres.

Scientific novelty and the practical importance.

For the first time physical and chemical bases and kinetic aspects of process of hydrogenolysis of cellulose with use rutenijsoderzhashchego a composite on the basis of Union of Right Forces in the environment of subcritical water are studied. Influence of such parametres, as temperature, process time, fractional pressure of hydrogen, an agitating mode, composite type, a parity Ru/cellulose, on conversion of cellulose and selectivity on main products is studied. Optimum conditions of carrying out of process are found.

The mechanism of passing of process of hydrogenolysis of cellulose and as the optimum kinetic model is picked up is studied. Scientific novelty proves to be true the patent of the Russian Federation for the invention “the Way of catalytic conversion of cellulose in
geksitoly ”№ 2497800. The practical importance of scientific work is confirmed by award in 2012 of the grant of Fund Bortnika under the program"U.M.N.I.K", the state contract № 11706р/17152.

The personal contribution of the author. The author personally executes all experiments resulted in the dissertation, on studying of physical and chemical bases of hydrogenolysis of cellulose. The author has mastered techniques and took part in carrying out of such methods of the analysis, as translucent electronic microscopy, Ik-Fure spectroscopy, low-temperature adsorption of nitrogen, rentgenofotoelektronnaja spectroscopy.

Directed by a problem, the analysis and discussion of the received results, preparation of publications the author took over direct participation together with the supervisor of studies. Work is executed on chair of Biotechnology and chemistry of the Tver state technical university.

Work approbation. Dissertation original positions were reported at following conferences: the International conference of students, post-graduate students and young scientists: Republican scientifically-practical conference of young scientists źthe Science. Formation. Youth╗ (Alma-Ata, Kazakhstan, 2012), II All-Russia scientific school-conference of young scientists źCatalysis: from a science to the industry╗ (Tomsk, 2012), the International youth scientific forum "Lomonosov-2013" (Moscow, 2013), 6ой to General assembly under design Polycat (Tver, 2013), 10ом the Congress on applied catalysis in thin chemical synthesis CAFC 10 (Turku, Finland, 2013), 23ей Conferences of the North American Catalytic Society (Louisville, the USA, 2013), XI International conference EuropaCat XI (Lyons, France, 2013), ХХІ Karginsky readings with the international participation (Tver, 2014), VI International conference of the Russian chemical society it. D.I. Mendeleyev (Moscow, 2014), XII International conference EuropaCat XII (Kazan, 2015), VIII Nauchnoyopraktichesky conference with the international participation źSupercritical fluids (SKF): fundamental bases, technologies, innovations╗ (Zelenogradsk, 2015), VI All-Russia Youth scientific and technical conference źthe High technology chemical technologies-2015╗ (Moscow, 2015), etc.

Publications. By results of the made researches 19 articles, 8 of which in the leading reviewed scientific magazines recommended VAK are published 41 printed work, including, 21 thesis of conferences and is received the patent of the Russian Federation for the invention “the Way of catalytic conversion of cellulose in geksitoly” № 2497800.

Structure and dissertation volume

Volume and dissertation structure. The dissertation consists of the introduction, three heads, conclusions, the literature list. Total amount of work of 12 6 pages. In dissertations of 19 tables, 42 drawings and 24 formulas. The literature list includes names of works of domestic and foreign authors (113).

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A source: FILATOVA Anastasia Evgenevna. PHYSICAL AND CHEMICAL BASES of PROCESS of HYDROGENOLYSIS of CELLULOSE. The dissertation AUTOABSTRACT on competition of a scientific degree of a Cand.Chem.Sci. Tver - 2016. 2016

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