91results about "Working-up pitch/asphalt/bitumen by mixing fractions" patented technology

A sulfur in oil in asphalt and polymer blend is disclosed. An asphalt and polymer blend is first prepared and then a slurry of solid sulfur in liquid oil added. Addition of a slurry of solid sulfur in oil or oil containing sulfur compounds, permits rapid and effective uniform dispersion of the sulfur component in the asphalt/polymer blend. Uneven mixing, which can occur when sulfur is separately added as a solid to the asphalt blend, is avoided. Polymer use is optimized because polymer matrix development (digestion/swelling) can be completed before cross-linking occurs. The method is safer because formation of explosive clouds of sulfur dust is avoided.

The invention relates to a method for recycling a waste FCC (fluid catalytic cracking) catalyst. The specific method is as follows: screening the waste FCC catalyst, wherein the waste FCC catalyst with the particle size of more than 40 mu m is used as a fine aggregate or filler in an asphalt mixture, and the waste FCC catalyst with the particle size of less than 40 mu m is used for modifying asphalt. The method provided by the invention has the beneficial effects that 1) the waste FCC catalyst with the particle size of less than 40 mu m is used for preparing the modified asphalt, and the waste FCC catalyst with the large particle size is used as the filler or a coarse aggregate, thereby realizing maximum utilization of the waste FCC catalyst; and 2) after surface treatment of the waste FCC catalyst, the compatibility with the asphalt is improved, and the high-temperature stability, low-temperature anti-cracking property, and the like of the ordinary asphalt material are significantly improved.

A low-viscosity, high-softening point heavy hydrocarbon material having a viscosity-reducing amount of at least one biodiesel material dissolved in a heavy hydrocarbon, and a method for producing such low-viscosity, high-softening point heavy hydrocarbon material are disclosed.

A high coking value pitch with a relatively low softening point is disclosed. A pitch is distilled or thermally processed to produce an intermediate pitch with an increased coking value and relatively high softening point, then blended with a cutter solvent of a liquid hydrocarbon stream to form a product pitch. The process may be used to increase the coking value of either petroleum or coal tar pitch. Preferably the cutter solvent is methylnaphthalene, or a highly aromatic, low viscosity oil or similar aromatic rich stream having a substantially lower boiling point than the intermediate pitch product.

A 40 petroleum pitch is disclosed. A high melting point petroleum pitch is blended with a high boiling normally liquid petroleum derived hydrocarbon stream to form a mixture having a softening point of 35-45 C. as a partial or complete replacement for coal tar pitch used in driveway sealer and other sealer applications. Driveway sealer (an emulsion of clay, water and binder) made with A 40 has excellent durability and can have a greatly reduced amount of, or be essentially free of, coal tar pitch, greatly reducing the toxicity and odor of the sealer.

The invention relates to the field of coal liquefaction residue modified asphalt and discloses coal liquefaction residue modified asphalt and a preparation method and application thereof.The coal liquefaction residue modified asphalt is obtained by mixing coal direct liquefaction residues and an additive, the aromatic content in the additive is 60% or above, and the additive is catalytic cracking oil slurry, extracted oil, coking oil, cracking tail oil or aromatic oil or a mixture formed by mixing at least two of catalytic cracking oil slurry, extracted oil, coking oil, cracking tail oil and aromatic oil.The process is simple, operation is easy, production cost is low, and product property controllability is high.

The invention relates to a method for catalytic synthesis of a high quality intermediate phase carbon material with pure aromatic hydrocarbon. The method includes the steps of: (1) taking one or two of fraction naphthalene and anthracene in coal tar as the raw material, conducting blending and adding the raw material into a raw material tank, performing mixing and heating, then adding a catalyst and conducting full stirring; (2) adding the liquid mixture of step (1) into a microwave heating reactor through a metering pump; (3) controlling the temperature of a liquid outlet of the microwave heating reactor at 195DEG C; (4) cooling a mixed compound left by distillation at the bottom of a distillation kettle to 160DEG C, and performing full stirring till stratification; (5) heating a lower separated liquid X2 obtained by step (4) to 180-200DEG C, then passing the liquid through a fractionating tower to obtain a distilled liquid S3; (6) transferring high purity asphalt Z obtained in step (5) into a growth furnace, and performing stirring, at the same time introducing nitrogen, and conducting heat preservation for 6h to generate an intermediate phase carbon material, i.e. intermediate phase asphalt; and (7) taking the product obtained by cooling in step (6) out rapidly, and loading the product into a nitrogen protected sealed barrel. The method provided by the invention improves the content of the intermediate phase, and the preparation method is simple and is convenient for popularization and use.

The invention discloses spinnable asphalt and a preparation method thereof, wherein the spinnable asphalt comprises the following raw materials in parts by weight: 20-50 parts of medium and low temperature coal pitch-based refined asphalt and 50-80 parts of petroleum asphalt. The preparation method comprises the following steps: uniformly mixing 20-50 parts by weight of medium and low temperaturecoal pitch-based refined asphalt and 50-80 parts by weight of crushed petroleum asphalt, and putting the mixture into a reactor; and introducing inert gas into the reactor under normal pressure, heating to 370-450 DEG C at a speed of 2-9 DEG C/min, and reacting for 4-9 hours to obtain spinnable asphalt. According to the invention, high aromaticity is provided through refined asphalt, the aromaticcomponents and the asphaltene in petroleum asphalt are combined to provide a small amount of aromatic rings, and saturated components and colloid provide alkyl side chains and naphthenic structures, so that the high-quality spinnable asphalt having high softening point and narrow melting range and capable of continuously spinning can be obtained, the petroleum asphalt is used for replacing a modifier, and the preparation technological process of the spinnable asphalt can be simplified.

The invention provides a method for enriching diluents with butane so as not to violate pre-defined limits for liquid hydrocarbon fuels with respect to density, volatility and low density hydrocarbon content.

The invention discloses Australian C-320 asphalt and a production method thereof. The asphalt provided by the invention is prepared from the following components in parts by mass: 100 parts of vacuumresidues, 0-5 parts of extract oil and 0-10 parts of hard asphalt. Specific appropriate crude oil is subjected to a specific mixed refining proportion and a specific production technology to produce the vacuum residues, then the vacuum residues are mixed with the extract oil and hard asphalt of specific requirements according to specific conditions, and thus an asphalt product meeting the standardrequirements of the Australian C-320 asphalt is produced; and therefore the problem that an asphalt product produced by traditional petroleum refining raw materials and production process cannot meetthe quality standards of the Australian C-320 asphalt is solved.

The invention relates to a chemical reactive modified asphalt profile modifying/water plugging agent and a preparation method and application of the profile modifying/water plugging agent. The preparation method comprises the following steps: S1, performing modification on petroleum asphalt by vulcanization to obtain sulphurized petroleum asphalt; S2, performing cationic modification on petroleum asphalt to obtain cation-modified petroleum asphalt; S3, adding the sulphurized petroleum asphalt and the cation-modified petroleum asphalt into naphtha, and then adding organic ammonium compounds, fully stirring for reaction for 40-60 min to obtain the chemical reactive modified asphalt profile modifying/water plugging agent. According to the chemical reactive modified asphalt profile modifying/water plugging agent and the preparation method and application of the profile modifying/water plugging agent, provided by the invention, by specific preparation steps, selection of components and technological parameters, the finally obtained profile modifying/water plugging agent has good plugging performance, erosion resistance property, high-temperature resistance and pH-resistance, and further has a good application prospect and industrial potential in the field of petroleum industry.

The invention provides a continuous production method of a graphite coated material. The continuous production method comprises the following steps: preheating raw oil; conveying the raw oil to a preheater, heating to 120-180 DEG C and then conveying the raw oil to a dehydration tower to be subjected to dehydration treatment; conveying the raw oil into a next-stage preheater, heating, carrying out primary vacuum rectification, respectively conveying fractions to an evaporator and a reboiler through a conveying pump at the bottom of a rectifying tower kettle, respectively conveying the fractions obtained by rectification to the middle part of the rectifying tower and the upper part of the rectifying tower kettle, carrying out secondary vacuum rectification to produce asphalt with the softening point of 100-200 DEG C; conveying the asphalt into a first reaction kettle for reaction to obtain asphalt with the softening point of 120-220 DEG C; then conveying the asphalt into a second reaction kettle for reaction to obtain asphalt with the softening point of 150-240 DEG C; and finally, conveying the asphalt into two wiped-film evaporators to obtain the asphalt with the softening point of 200-280 DEG C. According to the invention, continuous production is realized, the production cost is obviously reduced, and product industrialization can be realized.

Methods are provided for reducing or minimizing the temperature dependence of a pitch feed or fraction for use in carbon fiber production, such as a mesophase pitch feed or fraction or an isotropic pitch feed or fraction. A pitch sample can be characterized to determine a characteristic temperature and a characteristic viscosity for the sample. One or more solvent extraction processes can also be performed on the pitch and/or the extract and raffinate fractions formed by the solvent extraction(s). The resulting raffinate and extract fractions are then used to form a modified pitch fraction with a T₀ value that is lower than the T₀ value of the original pitch. The modified pitch fraction can optionally also have a different η_inf value relative to the original pitch.

The invention relates to a method for preparing coal bar pitch having improved compatibility with asphalt and asphalt containing the same, with the prepared pitch applicable to road paving and comprising the mixture of coal tar pitch and petroleum asphalt. The method is characterized by employing oil fraction having large quantity of aromatic ingredients to prepare the coal tar pitch having improved compatibility with asphalt, thus to inhibit the increase of the triclene undissolved substance and the separation of the material while the coal tar pitch and the petroleum asphalt are simply mixed. The invention also relates to a method for preparing the pitch containing the coal tar pitch. The pitch containing coal tar pitch can be employed as road-paving material effectively.

The invention provides a process for preparing needle coke from medium-low temperature coal tar pitch by a four-stage variable temperature refining one-step method and belongs to the technical field of needle coke preparation. The process specifically comprises the following steps of: (1) performing medium-low temperature coal tar fraction distilling; (2) carrying out four-stage variable-temperature refining to obtain refined raw material maltha; (3) carrying out a thermal polymerization reaction to prepare semicoke; and (3) performing calcining, and performing cooling to room temperature to obtain the needle coke. The needle coke prepared by the preparation method of the needle coke is high in yield, stable in yield and high in quality.

The invention discloses a preparation method for slurry oil mixed asphalt. The preparation method comprises the following steps: (1) adding a sulfhydryl compound into slurry oil for mixing reaction to obtain modified slurry oil; (2) adding the modified slurry oil into a molten asphalt stock for mixing to obtain the slurry oil mixed asphalt. The slurry oil mixed asphalt prepared by adopting the preparation method has a relatively high penetration ratio, and the anti-aging performance of asphalt is improved; the preparation method expands the application approaches of slurry oil resources in asphalt, and facilitates the increase of utilization benefits of slurry oil.

An asphalt processing system is formed from a heating drum and an induction heating system. Flights move asphalt through the heating drum, which concurrently heat the asphalt along with the heating drum wall. A mixing drum can be connected to the heating drum, and include paddles or flights to move the asphalt, while concurrently mixing the material to ensure consistent temperatures through the asphalt cement. The asphalt is heating using one or more induction heating systems to quickly heat the asphalt to between 275° F. and 750° F., followed by moving the asphalt to between 275° F. and 350° F. The system can include a convection system that heats recirculated air through the heating drum. A water condenser can be employed to remove moisture during air recirculation, and reduce asphalt moisture content. The asphalt cement is optionally modified by addition of one or more rejuvenation oils. This system is particularly useful for recycled asphalt pavement, but can be used for all asphalt products.

The invention discloses a method for preparing an asphalt waterproof coiled material, which belongs to the technical field of waterproof coiled material preparation. The present invention weighs asphalt, soaks it repeatedly in acid and alkali, turns it in the sun until dry, crushes, grinds and sieves to obtain asphalt powder, adds concentrated sulfuric acid to acidify, mixes it with polyacrylamide, and then undergoes shaker oscillation and ultrasonic dispersion treatment Afterwards, high-temperature melting is carried out, and carbon black is sprayed on the surface of the melt at the same time, and N,N-diphenyl-p-phenylenediamine and tall oil are added for heat preservation to prepare bitumen waterproof membrane. The beneficial effects of the invention are: the preparation steps of the invention are simple, and the obtained product does not need to be melted at high temperature when used, saving time and effort; the construction period is short, the cost is reduced by 20-30%, and the water resistance is good.