Abstract:
Die Erfindung betrifft die Verwendung von Lösemittel für die Rohdichtebestimmung und Extraktionsanalyse von Asphalt. Das Lösemittel ist, soweit es aus zwei Komponenten besteht, ein neuer Stoff. Die Erfindung findet Anwendung im Baugewerbe, insbesondere im Rahmen der Qualitätskontrollen von Asphaltgemischen im Straßenbau. Der Erfindung liegt die Aufgabe zugrunde, das krebserregende Lösemittel Trichlorethen (Tri) durch ein nicht toxisches, praktisch ungiftiges Lösemittel, das leicht biologisch abbaubar ist und aus nachwachsenden Rohstoffen gewonnen wird, zu ersetzen. Es soll weiterhin polymermodifiziertes Bitumen, z. B. mit elastomeren Bestandteilen, vollständig gelöst werden. Erfindungsgemäß wird die Aufgabe gelöst, indem ein Lösemittel mit hoher Reinheit von ≥ 99 % eingesetzt wird und Pflanzenölester mit definierten Parametern hinsichtlich Flammpunkt und Siedepunkt darstellt. Als Hauptlösemittel wird Caprylsäuremethylester auf Basis von Pflanzenöl-Fettsäure-Methylester verwendet. Vor allem um polymermodifiziertes Bitumen vollständig zu lösen, wird dem Lösemittel ein Additiv zugegeben, wobei das Additiv einen polaren Zusatzstoff aus nachwachsenden Rohstoffen aus dem Bereich der Pflanzenöle darstellt. Dieser Stoff ist somit ein Gemisch aus zwei Komponenten, nämlich der ersten Komponente, bestehend aus Pflanzenölen und -fetten gewonnene Ester mit einem Flammpunkt ≥ 70 °C und einem Siedepunkt zwischen 150 °C und 230 °C sowie der zweiten Komponente, dem Additiv, wobei ein Masseverhältnis von erster zu zweiter Komponente von 9,0 bis 9,5 Teilen zu 0,5 bis 1,0 Teilen gegeben ist.
Abstract:
US0118523ng component for a solvated mesophase pitch. The solvated component includes a mixture of aromatic hydrocarbons having boiling points in the atmospheric equivalent boiling point range of about 285 DEG to about 460 DEG C (about 550 DEG F - 932 DEG F). At least 80 % of the carbon atoms of the hydrocarbons are aromatic as characterized by carbon 13 NMR. The aromatic hydrocarbons are selected from a group consisting of aromatic compounds having 2 to 5 aromatic rings, substituted aromatic compounds having 2 to 5 aromatic rings wherein said substituents are alkyl groups having 1 to 3 carbons, hydroaromatic compounds having 2 to 5 rings, substituted aromatic compound having 2 to 5 rings wherein said substituents are alkyl groups having 1 to 3 carbons, and mixtures thereof.
Abstract:
The present invention provides a process for obtaining a very clean mesophase pitch from isotropic pitch. This invention utilizes a solvent fractionation process which does not involve the process steps, yield loss and waste generation associated with fluxing and filtering the isotropic pitch. Additionally, this invention provides a liquid/liquid extraction process that avoids the solids handling and the high temperatures and pressures of supercritical fluid extraction. Finally, this invention controls the hardness of the mesophase product.
Abstract:
System and Process for Extracting Bitumen from Natural Asphalt 5 The present invention relates to a system and method for extracting bitumen from natural asphalt. The system of the present invention comprises a crushing system (100) for crushing natural asphalt, a mixing system (200) connectable to the crushing system for mixing rushed natural asphalt with demulsifying agents to form a homogenous mixture, and a separating system (300) connectable to the mixing 10 system for separating crude bitumen from the homogenous mixture. The present application also discloses a process for extracting bitumen from natural asphalt, the process comprising crushing the natural asphalt in a crusher, mixing crushed natural asphalt with demulsifying agents in a mixer connectable to the crusher to form a homogenous mixture, and separating crude bitumen from the homogenous mixture in 15 at least a thickener.
Abstract:
This invention provides a process for preparing a solvated isotropic pitch having a fluid temperature at least 40 DEG C lower than the same pitch in the non-solvated state. Additionally, the present invention provides a solvated isotropic pitch which may be formed into carbon artifacts which do not require oxidative stabilization prior to carbonization.
Abstract:
A Process and system for converting petroleum residue ("resid") into a liquid product and a solid product. The resid (10) is first mixed with a solvent (16) having a generally nonpolar molecular character. A strong electric field is then applied to the mixture to agglomerate the asphaltenes and other large molecules in the resid. The agglomerates are then separated from the remaining liquid, thereby producing liquid (28) and solid products (26). The liquid product (28) is useful as a feedstock for petrochemicals and transportation fuels, and the solid product (26) is suitable for combustion as a coal substitute. A portion of the liquid product (28) may be recycled as the solvent (16).
Abstract:
The present invention generally relates to methods for resolving water and oil emulsions in the produced fluid of an oil production system comprising adding a structured copolymer reverse emulsion breaker to the produced fluid of the crude oil production system in an amount effective for resolving an oil-in-water emulsion. In particular, these methods for resolving an oil-in-water emulsion can be used in separation processes where the oil and solids in the produced fluid are separated from the produced water in the produced fluid.