Renáta Zsanett Boros

Removal of aluminum content of concentrated salt solutions by ion exchange: Experimental and simulation study

Benjámin Csorba, Péter Tóth, Andrea Mihalkó, László Farkas et autres

In the chlor-alkali industry, membrane cell technology requires a significantly purer raw brine than other methods. Further developments of ion exchange for aluminum removal have been required. Several chelating ion exchange resins have been characterized and their Al-binding properties compared. Total binding …

Kinetic and Mechanistic Study of Polycarbodiimide Formation from 4,4′-Methylenediphenyl Diisocyanate

Marcell Csécsi, Renáta Zsanett Boros, Péter T. Tóth, László Farkas et autres

In the polyurethane industry, catalytically generated carbodiimides can modify the properties of isocyanate and, thus, the resulting foams. In this work, a kinetic reaction study was carried out to investigate the formation of a simple, bifunctional carbodiimide from a widely used polyurethane …

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Removal of aluminum content of concentrated salt solutions by precipitation, coagulation and sedimentation

Benjámin Csorba, László Farkas, Marcell Csécsi, Zoltán Hórvölgyi et autres

Abstract An efficient approach for aluminum removal was developed to produce high-purity brine feed for membrane cell electrolysis, the best available technique for chlorine production. The removal of aluminum from saturated (25 wt%) brine represented a knowledge gap. The pH dependence of …

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Removal of aluminum content of concentrated salt solutions by ion exchange: Experimental and simulation study = Tömény sóoldatok alumíniumtartalmának eltávolítása ioncserés eljárással: kísérleti és szimulációs elemzés

Benjámin Csorba, Péter Tóth, Andrea Mihalkó, László Farkas et autres

In the chlor-alkali industry, membrane cell technology requires a significantly purer raw brine than other methods. Further developments of ion exchange for aluminum removal have been required. Several chelating ion exchange resins have been characterized and their Al-binding properties compared. Total binding …

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Theoretical and Experimental Study on Carbodiimide Formation

Marcell Csécsi, Virág Kondor, Edina Reizer, Renáta Zsanett Boros et autres

Carbodiimides are important crosslinkers in organic synthesis and are used in the isocyanate industry as modifier additives. Therefore, the understanding of their formation is of high importance. In this work, we present a theoretical B3LYP/6-31G(d) and SMD solvent model and experimental investigation …

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Photometric Determination of Trace Amounts of Aluminum in Nearly Saturated Rock Salt Solutions Used by Chlor-alkali Industry

Benjámin Csorba, László Farkas, Andrea Mihalkó, Renáta Zsanett Boros et autres

The previously widespread mercury cell technology in chlorine production has now been replaced by more environmentally friendly membrane cell electrolysis which is a Best Available Techniques (BAT) technology. However, this requires a much cleaner brine containing contaminants (Al, Ca, Mg, etc.) in …

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A Theoretical Study on the Phosgenation of 2,4-Toluenediamine (2,4-TDA)

Ravikumar Thangaraj, Tamás Horváth, Renáta Zsanett Boros, Béla Viskolcz et autres

Industrially relevant phosgenation mechanisms of 2,4-toluenediamine (2,4-TDA) were investigated using G3MP2B3 model chemistry. Six reaction pathways had been explored, which resulted in the formation of toluene diisocyanate (2,4-TDI) including different scenarios of the 'phosgenations first' and 'consecutive phosgenations' mechanisms in both gas …

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Comparison of Catalysts with MIRA21 Model in Heterogeneous Catalytic Hydrogenation of Aromatic Nitro Compounds

Alexandra Jakab-Nácsa, Emőke Sikora, Ádám Prekob, László Vanyorek et autres

The vast majority of research and development activities begins with a detailed literature search to explore the current state-of-the-art. However, this search becomes increasingly difficult as we go into the information revolution of 21st century. The aim of the work is to …

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Composite Carbon Foams as an Alternative to the Conventional Biomass-Derived Activated Carbon in Catalytic Application

Mahitha Udayakumar, Renáta Zsanett Boros, László Farkas, Andrea Simon et autres

The suitability of a new type of polyurethane-based composite carbon foam for several possible usages is evaluated and reported. A comparison of the properties of the as-prepared carbon foams was performed with widely available commercial biomass-derived activated carbon. Carbon foams were synthesized …

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An Ab Initio Investigation of the 4,4′-Methlylene Diphenyl Diamine (4,4′-MDA) Formation from the Reaction of Aniline with Formaldehyde

Renáta Zsanett Boros, László Farkas, Károly Nehéz, Béla Viskolcz et autres

The most commonly applied industrial synthesis of 4,4′-methylene diphenyl diamine (4,4′-MDA), an important polyurethane intermediate, is the reaction of aniline and formaldehyde. Molecular understanding of the 4,4′-MDA formation can provide strategy to prevent from side reactions. In this work, a molecular mechanism …

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A theoretical study on the phosgenation of methylene diphenyl diamine (MDA)

Renáta Zsanett Boros, Tamás Koós, Wafaa Cheikh, Károly Nehéz et autres

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Industrial application of molecular computations on the dimerization of methylene diphenyl diisocyanate

Renáta Zsanett Boros, Anita Rágyanszki, Imre G. Csizmadia, Béla Fiser et autres

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