The hydrophobic modification effect and an appropriate cost of waterborne polyurethane are regularly pursued targets researchers. To further enhance the terminal fluoroalkyl group control cost, a fluorine-containing pendant diol (DEFA) was first synthesized by Michael addition reaction diethanolamine (DEOA) dodecafluoroheptyl methacrylate (G04). Next, series modified latexes (TPFPU) segments (p...

Hydrogen sulfide is essentially removed from the raw natural gas to meet process, health, safety and environmental standards. Alkanolamine based absorption process remains prevalent technique for hydrogen removal due ease of operation economic considerations. The design such separation systems a critical factor in meeting stringent requirements optimizing operations. To achieve precise design, ...

ABSTRACT This paper presents a failure analysis performed on tubes of heat exchanger. Heat exchangers are among the most common equipment in an oil refining industry, as transfer is one important and processes chemical petrochemical industries. The analyzed was condenser top system diethanolamine regeneration tower naphtha hydrotreating unit refinery. tubular bundle consists 78 ASTM A213 Grade ...

Study of biophysical interactions have been carried out using specific combination of proteins such as Brucella abortus cell envelop protein (as antigen) and its complementary antibody (raised in mice and rabbit). A best optimized composition of biocompatible CeO2 nano-octahedra and other biocompatible materials (chitosan) was used in this study. Linear range was found in the range of 6.25 μg/m...

An increasing interest has been sustained in the chemistry of metal-organic frameworks owing to their unique unusual properties and potential biological activities. Mono-substituted derivatives of benzoic acid such as hydroxybenzoic and nitrobenzoic acids demonstrate a low antimicrobial and moderate growth stimulating actions. Ethanolamines also show the same types of the biological action. In ...

Polyurethane cationomers were synthesised in the reaction of 4,4'-methylenebis(phenyl isocyanate) with polyoxyethylene glycol (M = 2,000) or poly(tetrafluoroethyleneoxide-co-difluoromethylene oxide) α,ω-diisocyanate and N-methyl diethanolamine. Amine segments were built-in to the urethane-isocyanate prepolymer in the reaction with 1-bromobutane or formic acid, and then they were converted to al...

The determination of cationic constituents of sweat is widely recognized as a difficult analytical task due to its complex composition and minute sample volumes available for the individual analysis. Capillary electrophoresis (CE) has been evaluated as a simple routine method to measure sweat metal cations, biogenic amines, and amino acids using a sampling procedure previously developed in one ...