{"title":"SEAL PRODUCTS AND THEIR ROLE IN THE PROCESS OF CONVERSION OF ISOBUTENE ON A HIGH SILICA ZEOLITE CATALYST","authors":"I. J. A. I. J. Ahmedova","doi":"10.32010/ajcn5012022-65","DOIUrl":"https://doi.org/10.32010/ajcn5012022-65","url":null,"abstract":"Conversion of isobutene on a high silica zeolite catalyst in the temperature interval (473-773 K) has been studied. The formation of liquid reaction products is observed at the temperature 473 K, whereas gaseous products form after 523K. Maximum yield of liquid products is observed at the temperature 573 K and makes up 67 %. With increase of contact time the yield of liquid reaction products shifts towards high temperatures. Formation of aromatic hydrocarbons is observed at the reaction temperature higher than 573 K. At the temperature 673 K the main mass of liquid products consists of aromatic hydrocarbons. The activity of H-form of HSZ (HHSZ) in the process of conversion of isobutene in the formation of liquid reaction products occurs only when 6-8% of seal products accumulate on its surface. By the method of ammonia adsorption on the initial and coked catalyst their acidic properties have been studied. It was shown that at the beginning of the process decrease in acidic properties of the catalyst occurs due to accumulation of seal products on it.\u0000\u0000Key words: catalyst, activity, isobutene, zeolite, seal products, temperature, heterogen, chromatography, spectroscopy.","PeriodicalId":245302,"journal":{"name":"Azerbaijan Journal of Chemical News","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125152335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"MODIFIED CONCRETES BASED ON NON-CLINKER BINDERS","authors":"E.F.Aslanov E.F.Aslanov, N.A. Jafarova N.A. Jafarova, T.K. Sherifova T.K. Sherifova","doi":"10.32010/ajcn05012022-48","DOIUrl":"https://doi.org/10.32010/ajcn05012022-48","url":null,"abstract":"The study of the properties of high-strength concrete on the basis of new binders made from technogen waste is discussed. Theoretical provisions for the hardening of a clinker-free binder, consisting of co-crushed dump steel-smelting slag, cullet, a modifying aluminum-containing additive, and an alkaline component hardening under conditions of heat and moisture treatment, have been developed. The optimal compositions of clinker-free binder and fine-grained concrete based on it have been determined. At 25.0 MPa of the activity of the clinker-free binder, the composition contains (metallurgical waste) slag -52%; cullet - 37%; modifying aluminum-containing additive -11%; alkalis (activator) - 7.4% (by weight of the binder). It has been established that to obtain fine-grained concrete grade M 150, it is necessary: 25% clinker-free binder and 75% mixed aggregate, consisting of 35% steel-smelting waste slag and 65% sand. With a water / binder ratio of 0.33.\u0000Keywords: clinker-free cement, waste, modified concrete, metallurgical slag, glass-alkali binder, slag cement.","PeriodicalId":245302,"journal":{"name":"Azerbaijan Journal of Chemical News","volume":"468 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128485819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"THE STUDY OF HEAVY METAL ION SORPTION KINETICS","authors":"E.S.Karimova E.S.Karimova","doi":"10.32010/ajcn05012022-32","DOIUrl":"https://doi.org/10.32010/ajcn05012022-32","url":null,"abstract":"Phosphorus-containing polymeric sorbent based on butadiene-styrene rubber was used to remove zinc, iron and chromium ions from water. The research was carried out to study the sorption characteristics by determining the effects of various parameters, such as the pH of the solution, the initial concentration of metal ions, the sorbent mass, the phase contact time, and temperature. The regularities of the kinetics of the sorption of zinc, iron and chromium ions on the phosphorus-containing sorbent synthesized on the basis of butadiene-styrene rubber were studied. On the basis of the results it was defined that the process of sorption of zinc, iron and chromium ions on the cation exchanger proceeds by an ion-exchange mechanism. The kinetics of this process is a combination of external and internal diffusion kinetics (with some predominance of external diffusion kinetics) and is better described by the pseudo-second order reaction model. In addition, a certain contribution to the overall speed of the process is made by the interaction of the sorbed ions with the functional groups of the cation exchanger. \u0000Keywords: phosphorus-containing cation exchanger, zinc, iron, chromium, sorption, kinetics.","PeriodicalId":245302,"journal":{"name":"Azerbaijan Journal of Chemical News","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126939162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"THE SbBiTe2Se-SbBiTe2S PHASE DIAGRAM OF THE Sb-Bi-S-Se-Te SYSTEM","authors":"F.R.Aliyev F.R.Aliyev","doi":"10.32010/ajcn04012022","DOIUrl":"https://doi.org/10.32010/ajcn04012022","url":null,"abstract":"Using powder X-ray diffraction (PXRD) and differential thermal analysis (DTA), the phase\u0000equilibria of the SbBiTe2Se – SbBiTe2S section were studied, and its T-x diagram was\u0000constructed. The system is non-quasibinary, due to both initial phases melting in the\u0000temperature range. The system is stable below the solidus, which is characterized by the formation of continuous solid solutions (α-phase) with a tetradymite-like hexagonal\u0000structure. An analysis of the structural features of tetradymite and other tetradymite-like\u0000compounds shows that the substitution of atoms by related atoms is possible in all layers of the packet. In this work sulfur atoms in the central layer can be easily replaced by selenium atoms. This tendency allows us to expect the formation of the range of compositions in the BiSb-Te-Se-S system in which substitutions are realized in cationic and anionic positions.\u0000Lattice parameters were determined from the results of powder diffraction patterns. It has been established that the crystal lattice parameters of solid solutions change linearly with composition, which complies with the Vegards rule.\u0000Keywords: SbBiTe2Se – SbBiTe2S system, phase diagram, tetradymite-like structure, solid solutions, high entropy alloys.","PeriodicalId":245302,"journal":{"name":"Azerbaijan Journal of Chemical News","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121397020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"AMINOMETHOXY DERIVATIVES OF CYCLOHEXANOL\u0000 AS BIOCORROSION INHIBITORS","authors":"S.V. Ismayilova S.V. Ismayilova","doi":"10.32010/ajcn05012022-54","DOIUrl":"https://doi.org/10.32010/ajcn05012022-54","url":null,"abstract":"Based on cyclohexanol, aliphatic amines (diethylamine, dipropylamine, dibutylamine, dihexylamine), and formaldehyde, new Mannich bases have been synthesized. The reaction was carried out at a temperature of 78–80°C for 4–5 h in a benzene solution at an equimolar ratio of the starting components. The yield of compounds was 63–80%. The physicochemical data of the synthesized compounds were determined. The composition and structure of the target products were confirmed by elemental analysis, IR, 1H and 13C NMR spectroscopy. Their influence on the vital activity of sulfate-reducing bacteria (SRB) of the \"Desulfovibrio desulfuricans\" type at three concentrations (25; 50; 100 mg/l) was studied. The resulting compounds showed high bactericidal properties. 1% solutions of these compounds in isopropyl alcohol at a concentration of 100 mg/l showed a 100% bactericidal effect. Given that these aminomethoxy derivatives of cyclohexanol affect bacteria at very low concentrations, they can be proposed as effective inhibitors against sulfate reducing bacteria.\u0000Keywords: cyclohexanol, aliphatic amines, Mannich bases, sulfatereducing bacteria, inhibitor-bactericides, biocorrosion.","PeriodicalId":245302,"journal":{"name":"Azerbaijan Journal of Chemical News","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124357746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}