Updated: 2026-01-11
Total number
Full text
Total number
Full text
Number of local repositories
Full text
0226U000239, (0124U000204) , R & D reports
Conversion of glycerol (waste of biodiesel production) under the conditions of hetero- and homocatalysis in reactions of acetalization, acylation and oxygen oxidation
Модифікація сірчаною кислотою природних бентоніту, кліноптилоліту та трепелу і напрацювання дослідних зразків відповідних каталізаторів. Дослідження механізмів та особливостей (кінетика, селективність, конверсія) перетворень гліцерину та його похідних в реакціях ацеталізації, ацилювання у присутності отриманих гетерогенних каталізаторів у перспективні сполуки з корисними властивостями. Оптимізація основних факторів, що визначають активність та селективність досліджених каталізаторів.
Yavolovskyi Arkadii O., Доктор хімічних наук
07-01-2026
Physico-Chemical Institute O. Bogatsky National Academy of Sciences of Ukraine
Development of scientific (and applied) aspects of use the N-hydroxyphthalimides and their derivatives as selective homogeneous catalysts of aerobic oxidation, also natural bentonite, clinoptilolite and trepel modified with sulfuric acid in reactions of glycerol acetalization, acylation and its derivatives (esters, ethers, carbonates, acetals, ketals, etc.) in so-called "low-tonnage products", which are promising as additives for motor fuels, pharmaceuticals, cosmetics, food industry, also for combinatorial chemistry as semi-products, synthons, etc.
Objects of research – natural aluminosilicates modified with sulfuric acid, glycerol and its catalytic transformations. Aim of work – develop scientific aspects of use N-hydroxyphthalimides and their derivatives as selective homogeneous catalysts of aerobic oxidation, also natural bentonite, clinoptilolite and trepel modified with sulfuric acid in reactions of glycerol acetalization, acylation and its derivatives (esters, ethers, carbonates, acetals, ketals, etc.) into so-called "low-tonnage products" that represent prospects as additives for motor fuels, pharmaceuticals, cosmetics, food industry, also for combinatorial chemistry as semi-products, synthons, etc. Research methods – gas-liquid chromatography. In reaction of GL with Ac, the main product is solketal (>95%). The influence of catalyst mass fraction, reaction temperature, and molar ratio on GL conversion and initial rate of its consumption was studied. It was found that H-Bent is more active among studied catalysts. The concentration order of GL in presence of H-CLI is impractical to determine, since this sample catalyzes process in a narrow range of (two) concentrations. In presence of H-Bent, the order is one, and in presence of H-Tr – two. In reaction of GL with AA, it is not possible to say unequivocally about predominant activity one of catalysts. Due to different chemical and phase composition, crystallinity and heterogeneous porous structure, catalysts show similar catalytic activity. In the reaction of GL with CHone, the main product is (1,4-dioxaspiro[4,5]decan-2-yl)methanol (99%). H-Tr withstands two cycles, H-Bent three cycles, while H-CLI proved to be more resistant to loss of its catalytic activity and withstood six cycles. In the reaction of GL with BA, five- and six-membered cyclic acetals are formed: the cis configuration of five-membered acetal, also the cis and trans configurations of six-membered acetal. The selectivity of reaction products doesn’t change.
Arkadii О. Yavolovskyi
Levchenko Olha O.
Kylymenchuk Olena D.
Derkach Larysa G.
Davtian Araksia S.
Zlatov Yevhen V.
2026-01-07
Updated: 2026-01-11
Saving a scientific data set occurs in two stages:
1.) Creating a data set
Enter the name of the set, a brief description of the set (annotation), and click the “Create set” button. After that, a draft data set will be automatically created, which you can save for further work with the set. The system will redirect you to the “Data set information” page.
2.) Filling in the data
On the “Data set information” page, you need to fill in all the fields related to the data set and upload the files.
Please note! Each file is uploaded separately. This is done to ensure the stable operation of the system.
Once you have filled in the information about the scientific data set and added the necessary files, you can save the draft or send the data to the system.
Please note! Once the data has been sent, you cannot change it.
Drafts are necessary for storing the data set and editing it before sending.
All accounts on the NRA website go through a standard registration procedure and are verified. However, in order to obtain additional features, such as publishing open reviews of academic texts, verification by affiliation is required.
To obtain the status “verified”, you must change your primary email address to a corporate one, which is tied to a scientific or educational institution.
For example: user@ukrintei.ua, user@nas.gov.ua
After confirming your corporate email address, your account will be automatically verified by affiliation.
If your email address is corporate, but your account does not have a verification mark, you need to write to us at the email address NRAT@ukrintei.ua. After verification, we will add your address to the database, and your account will be verified.
After completing the verification procedure for affiliation, you can change the primary email address to a convenient one for you, without losing your status during the current verification.
You only need to verify for affiliation once.
* We use corporate addresses from the Unified State Database on Education and the State Register of Scientific Institutions Supported by the State
To search for news published on the official website of NRАT in the “News” section, you need to enter one word, several words, or an exact phrase in the search field. Different terms are separated by spaces.
The search is performed everywhere – in the title and the news text.
For a more comprehensive result, it is recommended to use word stems (parts of words without endings).
When using multiple words for the search, they are combined using one of the logical methods described below.
By default, the logical connector “and” is used. In this case, search results will include all news releases that contain the specified words, even if they are located separately from each other and are in different parts of the text.
Example: Search phrase: OECD report. Search result: all news containing the words “report” and “OECD” in the text and in the title, both together and separately.
If a phrase or phrase is enclosed in quotation marks (“), the results will include all publications where this exact phrase or phrase is found.
Example: Search phrase: “OECD report.” Search result: all news containing the exact phrase “OECD report.”
If you know the publication date of the news or are interested in a specific time frame in which they were published on the website, you can select such a date or date range in the additional field that looks like a calendar. The date is entered in the format year-month-day and confirmed by clicking on the corresponding date in the calendar dropdown. You can enter a date or choose one by browsing through the calendar by months and years. By default, the interval starts from the oldest date (2018-01-23) and ends with the current date.
You can also use one or more hashtags, which are located under the search field on the right side of the “News” page.
Please note: The search for academic texts is carried out in a separate search window at the following link https://nrat.ukrintei.ua/searchdb.