Production of road oil bitumens by the method of chemical modification of oil residues.

Abstract

PRODUCTION OF ROAD OIL BITUMENS BY THE METHOD OF CHEMICAL MODIFICATION OF OIL RESIDUES © V.М. Gunka, PhD in technical sciences, Yu.V. Prysiazhnyi, PhD in technical sciences, Yu.Ya. Demchuk, PhD in technical sciences, Yu.M. Hrynchuk, PhD in technical sciences, Yu.V. Sidun, PhD in technical sciences, M.M. Bratychak, Doctor of Chemical Sciences (Lviv Polytechnic Naional University, 12 Stepan Bandera Str., 79013, Lviv, Ukraine) The article is devoted to obtaining road oil bitumen from oil residues by modifying them with relatively cheap low molecular weight organic substances. The proposed method relates to a chemical modification, which, in case of its industrial implementation, will allow avoiding the use of expensive physical modifiers. A 37 % aqueous solution of formaldehyde was used as low molecular weight organic substances (modifier / chemical reagent of the process) for chemical modification of tar; concentrated sulfuric acid (H2SO4) was used as a catalyst for the chemical modification of tar. As a feedstock for chemical modification, we used an oil residue - tar, selected at PJSC “Ukrtatnafta” (Kremenchug, Ukraine). The chemical modification with formaldehyde was carried out in hermetic stationary containers capable of operating under excess pressure. The photographs of the equipment are given. Since the ultimate goal of the work was to obtain road oil bitumen, then, analyzing the results of experimental studies, we focused on the quality characteristics of this particular product. At the same time, the most important quality indicators were determined, namely: the depth of needle penetration, softening temperature, ductility (extensibility), adhesion to glass (adhesion to glass), Fraas brittle temperature, penetration index. For tar, the following characteristics such as density, flash point in an open crucible, and a boiling point were additionally determined. As a result of the experiments, the fundamental possibility of obtaining road oil bitumen by the method of chemical modification of tar with formaldehyde was established. It was revealed that the process factors (formaldehyde content in the reaction mixture, catalyst content in the reaction mixture, temperature and duration) have a significant effect on the quality of the resulting product. Changing their values allows you to adjust the values of the quality characteristics of the resulting bitumen. Keywords: binders, bitumen, oil residue, modification. Corresponding author V.М. Gunka, e-mail: volodymyr.m.hunka@lpnu.ua

Improved Method for Determining Microbiological Contamination of Fatty Acid Methyl Esters and Blended Diesel Fuels

“…(13) In addition, all reaction products (2-4) can also be synthesized from arylmethanols, for example, (16) This determined the special role of arylmethanols; A. Bayer, R. Wegler, and other researchers considered them to be intermediate products of all condensation reactions of arenes and formaldehyde.…”

“…Further works of A.M. Nastyukov, as well as the research of A. Bayer laid the foundation for numerous studies in the field of arene-formaldehyde polycondensations, which gave an impetus to the production of various types of resins, which are still widely used. [6][7][8][9][10] At the Department of Chemical Technology of Oil and Gas Processing of the Lviv Polytechnic National University, research is being conducted related to the production of arene [11][12][13][14][15][16][17][18][19][20][21][22][23] and phenolformaldehyde [24][25][26][27][28][29][30][31] resins with the aim of obtaining bituminous materials with improved operational properties.…”

Effect of Bisphenol-Formaldehyde Resin on Physico-Mechanical Properties of Road Bitumen

“…At the same time, quite often chemical modification manages to obtain no worse, or even better, results from the point of view of the operational characteristics of the modification products. [7][8][9][10] Among the chemical modifiers that are actively used today to improve and preserve the initial properties of petroleum bitumens, the class of reactive plastics occupies a significant place. In particular, the most widely used: reactive terpolymers (RET), 11,12 epoxy resins, [13][14][15] phenol-formaldehyde 16,17 and polyester resins.…”

Adhesion in Bitumen/Aggregate System: Adhesion Mechanism and Test Methods

“…The simplest methods of this group include adhesion to the glass surface [30][31][32][33][34][35][36][37][38][39][40]. A portion of bitumen 0.35 g is weighed on a scale and placed on a glass plate (70 mm × 24 mm).…”