In this study, secondary polyethylene terephthalate (PET), an industrial waste, and monoethanolamine were treated in a ratio of 1:2.5 without the presence of a catalyst. The aminolysis process was carried out stepwise at 100-190 0 C for 5 hours. The resulting product fractions were separated and crystallized with twice their mass of water. The resulting product was separated into fractions using a vacuum filter. The filtrate was found to have a high yield of bis(2-hydroxyethyl)terephthalamide (BHETA) of 80%. The product was analyzed using IR spectroscopy. This article proposes an energy-efficient, environmentally friendly and catalyst-free method for obtaining value-added products from PET waste by recycling.
| Mualliflar | Yusupova, Malikaxon, Mamadjonova , Maxfora, Egamberdiev , Sahibjon, Abduvohidov, Iqboljon |
|---|---|
| Jurnal | Наманган муҳандисликтехнология институти илмийтехника журнали |
| Nashr sanasi | 2026-03-30 |
| Jild | 11 |
| Son | 1 |
| Betlar | 134-139 |
| Til | Ingliz |
| DOI | 10.61151/stjniet.v11i1.914 |
DOI: 10.61151/stjniet.v11i1.914 · Maqolaning asl sahifasi
Experiments were conducted to determine the effect of using newly designed convex-surfaced saw ribs in a cotton cleaning machine for removing large impurities, comparing their cleaning efficiency with that of standard…
The paper presents the results of separation of mechanical impurities of technical waters. With the help of the proposed effective technology and with the use of an improved filter, it is possible to purify technical…
The article examines the advantages of drying Rosa canina fruits using a drying technology with 3-stage vibrating conveyors. According to the research results, the use of 3-stage vibrating conveyors in the convective…
This work presents the results of an experimental study on a two-stage installation designed for deep purification of dust-laden air containing fibrous and fine-dispersed mineral particles. The experimental system…
This article presents an analysis of the organoleptic and physicochemical properties of sauce–paste semi-finished products developed for fish canned products. The study focuses on current and highly relevant issues…
This paper presents a methodology for determining the tribotechnical properties of structural materials interacting with raw cotton under frictional conditions. The main objective of the study is to evaluate the…
This research provides information about the locally cultivated Ziziphus jujuba Mill. (Chinese jujube). In particular, the study presents its botanical description, chemical composition, biological characteristics, and…
The textile and clothing and knitwear industry occupies a leading place in the world. The production of textile and garment and knitwear products is increasing day by day, the reason for this is the increase in the…
This article presents a scientific analysis of the chemical composition and biological significance of mulberry fruits. It specifically focuses on the amino acid and flavonoid content of Morus nigra L. (black mulberry)…
In the design of knitted garments, twisting (torsion)—a tendency of the fabric edges to curl or distort—is considered one of the most important physical-mechanical properties. This phenomenon arises from the structural…
Наманган муҳандисликтехнология институти илмийтехника журнали — barcha maqolalar