396results about "Working-up pitch/asphalt/bitumen by distillation" patented technology

A continuous process for fractioning, combination, and recombination of asphalt sources into asphalt components for pelletization of asphalt and asphalt-containing products such that the pellets formed are generally uniform in dimension, freely flowing, free from agglomeration, and the pelletized asphalt is packaged, and preferably compatibly packaged, for additional processing and applications.

The invention discloses a novel process for eliminating quinoline insoluble substances in a coal tar medium temperature pitch. The invention comprises the following steps: using the coal tar pitch as raw material, mixing with a solvent according to a certain proportion, and continuous extracting and settling separation for the settling separation of the quinoline insoluble substances in the pitch to obtain a clarified liquid and sediments. The invention is characterized in that the coal tar pitch material uses the coal tar medium temperature pitch; the coal tar medium temperature pitch and a mixed solvent of an aromatic hydrocarbon solvent and an aliphatic hydrocarbon solvent according to a certain proportion are preheated and respectively sent to a multi-level static mixer for even mix according to a proportion of 1:0.8-1.2 by weight to produce a mixing oil; and the continuous extracting and settling separation is carried out for eliminating the quinoline insoluble substances in the coal tar medium temperature pitch. Since the technical proposal is used, the invention has low cost and high separation efficiency, and the refine pitch after clarifying fully satisfies the requirement of producing needle coke or as an impregnant pitch.

The invention belongs to the technical field of a preparation method of spinning raw materials of high-performance pitch-based carbon fibers, and particularly relates to a preparation method of soluble mesophase pitch, which mainly solves the problems of the existing mesophase pitch preparation method that the process is complicated, requirements on the equipment are high, the cost is high, the industrialization process is difficult and the like. The invention adopts the technical scheme that the preparation method of the soluble mesophase pitch comprises the following steps of (1) thermally treating raw material pitch or ethylene bottom oil with a low softening point in an inert atmosphere, then distilling the material in a short distance or flashing the material, removing light ends, and collecting heavy fraction, i.e. heavy end pitch; (2) preparing the heavy enbd pitch into mesophase pitch; and (3) cooling the mesophase pitch to 320DEG C to 400DEG C, removing internal light ends, and collecting the heavy fraction, i.e. the mesophase pitch. The preparation method has the advantages of simplicity in process, moderate in reaction condition, low equipment requirement, low cost and adaptability to industrialized production.

The present invention is directed to the upgrading of heavy hydrocarbon feedstock that utilizes a short residence pyrolytic reactor operating under conditions that cracks and chemically upgrades the feedstock. The method for upgrading a heavy hydrocarbon feedstock comprises introducing a particulate heat carrier into an upflow reactor, introducing the heavy hydrocarbon feedstock into the upflow reactor at a location above that of the particulate heat carrier so that a loading ratio of the particulate heat carrier to feedstock is from about 15:1 to about 200:1, allowing the heavy hydrocarbon feedstock to interact with the heat carrier with a residence time of less than about 1 second, to produce a product stream, separating the product stream from the particulate heat carrier, regenerating the particulate heat carrier, and collecting a gaseous and liquid product from the product stream.

The invention relates to a continuous sedimentation process for production of needle coke. Under the continuous condition of in-out materials, the process carries out settling separation on an insoluble substance of quinoline to obtain a qualified light phase of the insoluble substance of the quinoline. The mixed ratio of an aliphatic solvent to an aromatic solvent is (0.6-1.2) to 1; the mixed ratio of a mixed solvent to soft coal-tar asphalt is (0.6-1.2) to 1; the mixed oil is pumped into settling separation equipment by a pump for the settling separation; light liquid slowly rises; and after the insoluble substance of the quinoline reaches the requirement, the light liquid is continuously discharged from the upper part and distilled to obtain refined asphalt. The continuous sedimentation process has the advantages that the prior intermittent sedimentation process is improved into the continuous sedimentation process, namely the in-out materials are processed under the continuous operating condition. The continuous operation can simplify operation, reduce equipment, the floor space and the blocking of the equipment, and is favorable for long-period operation of the process.

The invention relates to a high-softening-point coal-tar pitch production method, which is mainly and technically characterized in that the method comprises the following steps of: (1) adding low-QI (Quality Index) purified coal-tar pitch into a stirring tank, continuously feeding air into the stirring tank, carrying out stirring in the process of feeding air, and carrying out air oxidation under the condition of 200-300 DEG C, wherein the oxidation time is 4-12 h; and (2) after the oxidation is completed, adding the pitch into a film evaporator, carrying out thin-film distillation on the pitch at a temperature of 300-350 DEG C and under a vacuum negative pressure of 0.05-0.099 Mpa, removing light components in the pitch, and carrying out distillation treatment on the obtained product for one to four hours so as to obtain high-softening-point coal-tar pitch. The method disclosed by the invention is reasonable in design; and the softening point of high-softening-point coal-tar pitch produced by taking the low-QI purified coal-tar pitch as raw materials reaches 270-290 DEG C, and the high-softening-point coal-tar pitch is low in impurity content, high in purity, simple in production process, energy-saving and environmental-friendly, and can be widely applied to the production of cathode materials jackets for lithium ion batteries and carbon fibers.

The present invention provides a way to increase the softening point of heavier hydrocarbons in a relatively low cost and low pressure process using superheated steam to i) increase the carbon yield of the heavier hydrocarbons, while simultaneously ii) removing volatile components with a steam stripping process.

A process for producing mesophase pitch from high-temperature coal tar comprises: removing salts and quinoline insoluble fraction from a high-temperature coal tar to obtain a decant oil; using the decant oil as a hydrogenation feedstock, or pre-distilling the decant oil to obtain a residue with a boiling point higher than 230 and formulating the residue into a hydrogenation feedstock; catalytic hydrorefining the hydrogenation feedstock to obtain a hydrofined oil; distilling the hydrofined oil to obtain hydrogenated pitch; and subjecting the hydrogenated pitch to the thermal polymerization to obtain the mesophase pitch. The process has features such as an easily controllable degree of hydrogenation, complete removal of impurities, good raw material flowability, not tending to form the carbon deposition and the coking during the process, and not tending to jam the reactor. The product has a high content of mesophase pitch, a low softening point and a low impurity content.

The invention discloses a method for preparing general type coal series asphalt with spinnability by solvent extraction and oxidative thermopolymerization. The method comprises the following steps: tasking coal tar soft asphalt as a raw material, extracting and separating by using a mixed solvent of aliphatic hydrocarbon and aromatic hydrocarbon; taking the obtained refined asphalt as a raw material, carrying out oxidative thermopolymerization in a stainless steel reaction vessel, performing flash evaporation after finishing the oxidative thermopolymerization to obtain the general type coal series asphalt with spinnability. According to the invention, a solvent extraction method is used for removing a first quinoline insoluble substance of the asphalt, a process of oxidative thermopolymerization and flash evaporation is used to obtain the product, so that the disadvantages of wide molecular weight distribution of asphalt during the heat treatment process and high secondary quinoline insoluble substance content can be overcome. The general type coal series asphalt with spinnability has optical isotropy under the spinning temperature, has the characteristics of narrow molecular weight distribution, high softening point, good spinnability and high product yield, and is suitable for preparing general carbon fiber.

A process for producing pipeline-ready or refinery-ready feedstock from heavy hydrocarbons using a high-performance solvent extraction process with high local solvent-to-process fluid ratios yet maintaining low overall solvent-to-process fluid ratios, by first performing mild thermal cracking on the heavy hydrocarbons and then separating asphaltene-rich fractions from a resulting thermally affected fluid so that the high solvent-to-oil ratio portion of the process acts only on those asphaltene-rich fractions, and producing a dry, solid asphaltene as an end-product.

Systems and methods for processing one or more hydrocarbons are provided. A hydrocarbon can be selectively separated to provide one or more finished products and an asphaltenic hydrocarbon using a pretreatment process. The asphaltenic hydrocarbon can be selectively separated to provide a deasphalted oil and one or more asphaltenes. At least a portion of the deasphalted oil can be converted to one or more first products using a first post-treatment process. At least a portion of the one or more asphaltenes can be converted to one or more second products using a second post-treatment process.

A novel apparatus for producing sweet synthetic crude from a heavy hydrocarbon feed includes: an upgrader for receiving the heavy hydrocarbon feed and producing a distillate fraction including sour products, and high-carbon content by-products; a gasifier for receiving the high-carbon content by-products and producing synthetic fuel gas and sour by-products; a hydroprocessing unit for receiving the sour by-products and hydrogen gas, thereby producing gas and sweet crude; and a hydrogen recovery unit for receiving the synthetic fuel gas and producing further hydrogen gas and hydrogen-depleted synthetic fuel gas, the further hydrogen gas being supplied to the hydroprocessing unit.

A method of treating a hydrocarbon fluid that includes contacting the hydrocarbon fluid with an effective amount of ozone. A method for separating contaminants from a contaminated material includes supplying the contaminated material to a processing chamber, moving the contaminated material through the processing chamber, heating the contaminated material by externally heating the processing chamber so as to volatilize the contaminants in the contaminated material, removing vapor resulting from the heating, wherein the vapor comprises the volatilized contaminants, collecting, condensing, and recovering the volatilized contaminants, and contacting the volatilized contaminants with an effective amount of ozone.

A method recovering heat and water from a warm slurry, such as warm tailings from a oil sands extraction mining operation, is provided. The method comprises providing the tailings to a vacuum vessel, removing, from the vacuum vessel, warm vapor derived from the tailings, condensing the warm vapor in a condenser to produce water, and recovering the water from the condenser. Cool river or pond water can be warmed with the heat from the vapor for additional uses in the mining operation. Essentially pure water can be obtained in the process. This can also be achieved using one or flash vessels in series to condense the vapor. Power can also be generated from the vapor using a turbine.