Low molecular weight aromatic compounds possessing a nonflammable characteristic in fluoroalkyl end-capped acrylic acid oligomer/silica nanocomposite matrices after calcination at 800 °C under atmospheric conditions

AbstractThe paper presents the results of investigation of changes in the composition of hydrocarbons and sulfur-containing compounds of an atmospheric residue in the course of cracking in the presence of a tungsten carbide–nickel–chromium (WC/Ni–Cr) catalytic additive and without it. The cracking is carried out in an autoclave at 500 °C for 30 min. The addition of the WC/Ni–Cr additive promotes the deepening of reactions of destruction not only of resins and asphaltenes, but also high molecular weight naphthene-aromatic compounds of the atmospheric residue. It is shown that the content of low molecular weight C9–C17 n-alkanes and C9–C10 alkylbenzenes rose sharply in the products of cracking with addition of WC/Ni–Cr in comparison with those produced without the additive. Alkyl- and naphthene-substituted aromatic hydrocarbons of benzene, naphthalene, phenanthrene series, polyarenes, benzo- and dibenzothiophenes are identified.

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A new bacterial alcohol dehydrogenase active on degraded lignin and several low molecular weight aromatic compounds

FEMS Microbiology Letters ◽

10.1111/j.1574-6968.1989.tb03230.x ◽

1989 ◽

Vol 57 (1) ◽

pp. 109-114 ◽

Cited By ~ 6

Author(s):

Jean Pelmont ◽

Catherine Tournesac ◽

Ahmed Mliki ◽

Michel Barrelle ◽

Claude Beguin

Keyword(s):

Molecular Weight ◽

Alcohol Dehydrogenase ◽

Aromatic Compounds ◽

Low Molecular Weight

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An aerobic fixed-phase biofilm reactor system for the degradation of the low-molecular weight aromatic compounds occurring in the effluents of anaerobic digestors treating olive mill wastewaters

Journal of Biotechnology ◽

10.1016/s0168-1656(01)00236-x ◽

2001 ◽

Vol 87 (2) ◽

pp. 161-177 ◽

Cited By ~ 21

Author(s):

Lorenzo Bertin ◽

Mauro Majone ◽

Diana Di Gioia ◽

Fabio Fava

Keyword(s):

Molecular Weight ◽

Aromatic Compounds ◽

Biofilm Reactor ◽

Reactor System ◽

Low Molecular Weight ◽

Olive Mill Wastewaters ◽

Fixed Phase ◽

Olive Mill

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Low molecular weight poly(acrylic acid) as a salt scaling inhibitor in oilfield operations

Journal of the Iranian Chemical Society ◽

10.1007/bf03245924 ◽

2005 ◽

Vol 2 (3) ◽

pp. 212-219 ◽

Cited By ~ 12

Author(s):

S. Moulay ◽

M. Boukherissa ◽

F. Abdoune ◽

F. Z. Benabdelmoumene

Keyword(s):

Molecular Weight ◽

Acrylic Acid ◽

Low Molecular Weight ◽

Salt Scaling ◽

Oilfield Operations ◽

Poly Acrylic Acid

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Effects Of Environmental Factors On The Dispersion Behavior Of Iron Oxide In Aqueous Solutions With Poly Acrylic Acid

Archives of Metallurgy and Materials ◽

10.1515/amm-2015-0271 ◽

2015 ◽

Vol 60 (2) ◽

pp. 1561-1564

Author(s):

E.-H. Lee ◽

K.-M. Kim ◽

W.-Y. Maeng ◽

D.-H. Hur

Keyword(s):

Molecular Weight ◽

Acrylic Acid ◽

High Molecular Weight ◽

Low Molecular Weight ◽

Solution Ph ◽

Molecular Weights ◽

Aqueous Suspensions ◽

Magnetite Particles ◽

The Stability ◽

Poly Acrylic Acid

Abstract After preparing aqueous suspensions from magnetite particles with a poly-acrylic acid, we investigated the effects of several experimental parameters. We characterized the stability of the suspensions using visual inspection, sedimentation, adsorption, and thermal stability of the dispersant. The dispersion stability is affected by the solution pH, the concentrations of magnetite particles, the molecular weight, the concentration of the dispersants, and the temperature. The stability of the suspensions increased as the concentration of the dispersant and the temperature increased. In terms of the molecular weights of the dispersant, the suspensions with dispersant of low-molecular weight (1800) were more stable than those of high-molecular weight (250000) at room temperature. However, at high temperature the suspensions with high-molecular weight showed stability. The adsorption efficiency of the dispersant was very low. The dispersant of high-molecular weight showed a higher thermal integrity than that of low-molecular weight. From this work, we obtained the optimum conditions for stable aqueous suspensions of magnetite particles.

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