Topic
Aromatic hydrocarbon
About: Aromatic hydrocarbon is a research topic. Over the lifetime, 5814 publications have been published within this topic receiving 55499 citations. The topic is also known as: arene & arenes.
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Patent•
14 Jun 1971
TL;DR: In this article, a C6-C8 ANPHTHA FRACTION is combined with a combination of PRELIMINARY FRACTION, EXTRACTIVE DISTILLATION of the FRACTIONATION OVERHEAD, and SOLVENT EXGTRACTION of FRACTION BOTTOMS.
Abstract: AROMATIC HYDROCARBONS ARE SEPARATED FROM A MIXTURE OF AROMATICS AND NON-AROMATICS, SUCH AS A C6-C8 ANPHTHA FRACTION, BY A COMBINATION OF PRELIMINARY FRACTIONATION, EXTRACTIVE DISTILLATION OF THE FRACTIONATION OVERHEAD, AND SOLVENT EXGTRACTION OF THE FRACTIONATION BOTTOMS. D R A W I N G
21 citations
Patent•
22 Oct 2002TL;DR: The pyrimidone compounds exhibiting excellent antagonism against adenosine receptors (A1, A2A, and A2B receptors), particularly, compounds represented by the general formula (I), salts thereof, or solvates of both: as discussed by the authors.
Abstract: The invention provides novel pyrimidone compounds exhibiting excellent antagonism against adenosine receptors (A1, A2A, and A2B receptors), particularly, compounds represented by the general formula (I), salts thereof, or solvates of both: (I) wherein R1 and R2 are each independently hydrogen, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C3-8 cycloalkenyl, a 5- to 14-membered nonaromatic heterocyclic group, a C6-14 aromatic hydrocarbon group, a 5- to 14-membered aromatic heterocyclic group, C1-6 acyl, or C1-6 alkylsulfonyl; R3 is hydrogen, C1-6 alkyl, C2-6 alkenyl, or C2-6 alkynyl; R4 is a C6-14 aromatic hydrocarbon group; a 5- to 14-membered aromatic heterocyclic group, or a 5- to 14-membered nonaromatic heterocyclic group having at least one unsaturated bond; and R5 is a C6-14 aromatic hydrocarbon group or a 5- to 14-membered aromatic heterocyclic group (with the proviso that every group except hydrogen may be substituted).
21 citations
Patent•
15 Jul 2004
TL;DR: In this paper, the authors presented a foam film excellent in heat insulating properties, a multilayer foam film, heat shrinkable foam films comprising them, a heat-shrinkable multi-layer foam film and containers covered with the label.
Abstract: The invention provides a foam film excellent in heat insulating properties, a multilayer foam film, heat -shrinkable foam films comprising them, a heat-shrinkable multilayer foam film, a heat-shrinkable label, and containers covered with the label. A styrenic foam film characterized by having at least one foam layer which contains a resin composition consisting of 20 to 100 parts by mass of the following component (a) and 0 to 80 parts by mass of the component (b) and has a film thickness of 30 to 200μm and a specific gravity of 0.3 to 0.9: (a) a block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene at a ratio of 50/50 to 90/10, and (b) at least one vinyl aromatic hydrocarbon polymer selected from among the following components (i) to (v): (i) a block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene, (ii) a vinyl aromatic hydrocarbon polymer, (iii) a copolymer of a vinyl aromatic hydrocarbon and (meth)acrylic acid, (iv) a copolymer of a vinyl aromatic hydrocarbon and a (meth)acrylic ester, and (v) a rubber-modified styrenic polymer.
21 citations
TL;DR: In this article, the abilities of two microbial consortia (Y and F) to degrade aliphatic-aromatic hydrocarbon mixtures were investigated, and it was shown that the Y consortium degraded p-xylene more rapidly than n-octane.
Abstract: In this study, the abilities of two microbial consortia (Y and F) to degrade aliphatic–aromatic hydrocarbon mixtures were investigated. Y consortium preferentially degraded the aromatic hydrocarbon fractions in kerosene, while F consortium preferentially degraded the aliphatic hydrocarbon fractions. Degradation experiments were performed under aerobic conditions in sealed bottles containing liquid medium and n-octane or n-decane as representative aliphatic hydrocarbons or toluene, ethylbenzene or p-xylene as representative aromatic hydrocarbons (all at 100 mg/l). Results demonstrated that the Y consortium degraded p-xylene more rapidly than n-octane. It degraded toluene, ethylbenzene and p-xylene more rapidly than decane. In comparison, the F consortium degraded n-octane more rapidly than toluene, ethylbenzene or p-xylene, and n-decane more rapidly than toluene, ethylbenzene or p-xylene. 16S rRNA gene sequencing revealed that the Y consortium was dominated by Betaproteobacteria and the F consortium by Gammaproteobacteria, and in particular Pseudomonas. This could account for their metabolic differences. The substrate preferences of the two consortia showed that the aliphatic–aromatic hydrocarbon binary mixtures, especially the n-decane–toluene/ethylbenzene/p-xylene pairs, reflected their degradation ability of complex hydrocarbon compounds such as kerosene. This suggests that aliphatic–aromatic binary systems could be used as a tool to rapidly determine the degradation preferences of a microbial consortium.
21 citations
Patent•
24 Feb 1984TL;DR: In this article, a regenerated cellulose or cellulose acetate membrane has been impregnated with polyethylene glycol to achieve high selectivity for aromatic hydrocarbons at high flux.
Abstract: Aromatic hydrocarbons present in a hydrocarbon feed stream containing a mixture of aromatic hydrocarbons and non-aromatic saturated organic components are separated from said hydrocarbon feed stream by selective permeation of the aromatic hydrocarbon through a regenerated cellulose or cellulose acetate membrane which has been impregnated with polyethylene glycol. The thus treated membrane possesses high selectivity for aromatic hydrocarbons at a high flux. The amount and type of polyethylene glycol impregnated into the membrane is carefully controlled in order to achieve high aromatic selectivity and high flux.
21 citations