30 results about "Polynuclear aromatic hydrocarbon" patented technology

A method and apparatus for remediating porous contaminated material. In the method, fuel material is combined with the contaminated material and a smoldering combustion process is initiated in the contaminated material to remediate the contaminated material. Control systems are provided to control the smoldering combustion process. The contaminated material may include oily waste, asbestos fibers, and / or at least one of a chlorinated solvent, a polychlorinated biphenyl (PCB), a dioxin, a furan and a polynuclear aromatic hydrocarbon (PAH).

Emissions of polynuclear aromatic hydrocarbons (PAHs) from diesel engines may be reduced by blending a renewable hydrocarbon distillate with a base diesel fuel. The base diesel may be a fossil diesel fuel, a Fischer-Tropsch diesel fuel as well as a hydroprocessed biodiesel fuel or a combination thereof. The renewable hydrocarbon distillate is a fraction from hydrotreated bio-oil having a boiling point between from about 320° F. to about 700° F.

This invention provides improved methods for combustion synthesis of carbon nanomaterials, including fullerenes, employing multiple-ring aromatic hydrocarbon fuels selected for high carbon conversion to extractable fullerenes. The multiple-ring aromatic hydrocarbon fuels include those that contain polynuclear aromatic hydrocarbons. More specifically, multiple-ring aromatic hydrocarbon fuels contain a substantial amount of indene, methylnapthalenes or mixtures thereof. Coal tar and petroleum distillate fractions provide low cost hydrocarbon fuels containing polynuclear aromatic hydrocarbons, including without limitation, indene, methylnapthalenes or mixtures thereof.

A preparation method of a carbon-carbon composite material with high thermal conductivity comprises the following steps: parallelly arranging mesophase asphalt-based carbon fibers in a flat plate, uniformly spreading a layer of condensed polynuclear aromatic hydrocarbon resin powder on the mesophase asphalt-based carbon fibers, heating the resin powder for fully melting so as to coat a resin film layer on the fiber surface, naturally cooling to obtain a carbon fiber preform; or dissolving the condensed polynuclear aromatic hydrocarbon resin by an organic solvent to prepare a solution, soaking the mesophase asphalt-based carbon fibers in the solution, completely volatilizing the solvent to form a resin layer on the fiber surface so as to obtain the carbon fiber preform; cutting the carbon fiber preform into thin sheets according to a desired dimension, orderly stacking the sheet-like carbon fiber preform in a mold, performing pressurization to 20-70 MPa, heating to 110-145 DEG C, performing depressurization, maintaining for 0.5-2 hours, heating again to 200-300 DEG C, curing for 1-6 hours, after curing, naturally cooling to room temperature for demolding, performing carbonization at 900 DEG C of the obtained cured sample, soaking the sample with asphalt at a soaking temperature of 340-400 DEG C for soaking time of 1-8 hours, repeating the carbonization-soaking cyclic process to increase the sample density to 1.5-1.7 g / cm3, and performing graphitization to prepare the carbon-carbon composite material with high thermal conductivity. The invention has the advantages of low energy consumption and high thermal conductivity.

Methods of extracting 1-4 cycle heterocyclic compounds and 2-5 cycle polynuclear aromatic hydrocarbons from a hydrocarbon feedstock are described. The methods include providing a hydrocarbon feedstock containing crude oil fractions, and determining an A / R ratio and an asphaltene concentration of the hydrocarbon feedstock. Based upon the A / R ratio and the asphaltene concentration, the treatable hydrocarbon feedstock undergoes one or more of cracking and fractionating. Subsequently, at least one targeted portion of the heterocyclic compounds is extracted from the fractionated stream with an aqueous solvent. A stream containing the 2-5 cycle polynuclear aromatic hydrocarbons is transferred to an extractor and the 2-5 cycle polynuclear aromatic hydrocarbons are extracted with a solvent system comprising an aprotic solvent.

The invention relates to a thermoplastic radiation-resistant halogen-free low-smoke flame-retardant sheath material for nuclear power plant cables, belonging to the technical field of novel cable materials. In order to solve the material performance requirements when the existing sheathing materials cannot meet the large size, a thermoplastic radiation-resistant halogen-free low-smoke flame-retardant sheathing material for nuclear power plant cables is provided, which includes the following parts by weight: 100% of the base material, and the base material is at least Contains high temperature resistant polyolefin elastomer; high temperature resistant radiation resistant modified masterbatch: 30~40, at least contains condensed polycyclic polynuclear aromatic hydrocarbon resin and high temperature and radiation resistant resin; flame retardant: 100~200, at least contains aluminum hydroxide ; Antioxidant: 4.0-12, at least containing asymmetric hindered phenolic calixarene as main antioxidant; Anti-radiation agent: 1.0-12. The invention can form a synergistic effect, can meet the requirements of thermal life and radiation resistance performance of 90°C / 60 years, and its sheath has uniformity, which is suitable for cable materials with large diameter and thick sheath layer, and has high flame retardant performance.

Methods are provided for extracting heterocyclic compounds, organometallic compounds, and polynuclear aromatic hydrocarbons from a hydrocarbon feedstock such as crude oil or a crude fraction. The heterocyclic compounds and organometallic compounds are removed from the hydrocarbon feedstock through one or more successive extractions to form a first raffinate. The extractions use a first solvent system containing an ionic liquid formed from carbon dioxide and water. The polynuclear aromatic hydrocarbons are removed from the first raffinate using a second solvent system containing an aprotic solvent such as NMP, DMSO, aromatics, or combinations thereof. The extracted compounds remain chemically intact and may be fractionated for further applications. Further methods are provided for producing a hydrocarbon raffinate having reduced levels of heterocyclic compounds, organometallic compounds, and 2-4 cycle polynuclear aromatic hydrocarbons.

The invention relates to a high-strength flame-retardant polycarbonate composite material and a preparation method thereof, which solves the problem that the existing high flame-retardant and strength cannot be combined, and provides a high-strength flame-retardant polycarbonate composite material and a preparation method thereof, including polycarbonate Ester: 50~90; Polyisobutylene: 1.0~1.5; Phosphorous halogen-free flame retardant: 1.0~5.0; Phosphorous maleimide ester: 0.5~0.8; Hydrotalcite powder: 2.0~3.0; Condensed polycyclic multinuclear Aromatic resin: 10~15; nitrogen flame retardant: 2.0~4.0; sodium perfluorooctane sulfonate: 1.0~2.0; kaolin: 0.5~0.7; anti-dripping agent: 0.01~10; glass fiber: 2.0~4.0 ; Impact modifier: 3.0 to 5.0; Toughener: 5.0 to 8.0; Antioxidant: 1.0 to 1.5; Mix the above raw materials in proportion, extrude and granulate. It has high flame retardancy and bending strength properties.

Methods of extracting 1-4 cycle heterocyclic compounds and 2-5 cycle polynuclear aromatic hydrocarbons from a hydrocarbon feedstock are described. The methods include providing a hydrocarbon feedstockcontaining crude oil fractions, and determining an A / R ratio and an asphaltene concentration of the hydrocarbon feedstock. Based upon the A / R ratio and the asphaltene concentration, the treatable hydrocarbon feedstock undergoes one or more of cracking and fractionating. Subsequently, at least one targeted portion of the heterocyclic compounds is extracted from the fractionated stream with an aqueous solvent. A stream containing the 2-5 cycle polynuclear aromatic hydrocarbons is transferred to an extractor and the 2-5 cycle polynuclear aromatic hydrocarbons are extracted with a solvent systemcomprising an aprotic solvent.

The invention discloses a modified polyolefin material and a special modified resin thereof, as well as a method for preparing the same. The method comprises the steps of utilizing crude-oil residual oil or residual oil to prepare polynuclear aromatic resin and well mixing the residual oil, crosslinking agent and catalysts for reaction. The invention also provides a method of utilizing the resin to modify polyolefin material, which is to melt and compound polynuclear aromatic condensation resin and polyolefin or the two added with inorganic filler. The polynuclear aromatic resin powder has high surface activity, compatibility, dispersibility, ultraviolet radiation resistance and environment resistance. The polyolefin material modified by use of the resin has the advantages of good dispersibility, heat resistance, environment resistance, remarkably improved comprehensive mechanical properties and high application value.