240results about "Working-up pitch/asphalt/bitumen by melting" patented technology

A consumable container is molded from a composition comprising 40 to 90 weight % of an asphalt and 10 to 60 weight % of a polymer material, which advantageously can include a first polymer such as PP that imparts heat resistance and a second polymer such as EVA that imparts toughness and impact resistance. This molded asphalt/polymer material preferably has an unnotched Izod impact strength of at least 2 joules. The container is consumable-it can be melted along with roofing asphalt held in the container without adversely affecting the properties of the asphalt and without requiring undue mixing. The composition also can be used to reduce fumes normally emitted from a kettle of molten asphalt, e.g., as measured by a reduction of the visual opacity of the fumes by at least 25%, a reduction of the hydrocarbon emissions of the fumes by at least 20%, or a reduction of the total suspended particulates emissions of the fumes by at least 15%. The container may be used, e.g., to hold roofing or paving asphalt or a recyclable petroleum-derived material, such as used motor oil. In one embodiment, the container composition may include one or more ingredients to improve the quality of paving-grade asphalt

The subject invention provides devices and methods for heating pipes, tubing or similar equipment. More specifically, the subject invention pertains to devices and methods for heating pipes, tubing or similar equipment to melt-out blockages, such as for example, bitumen blockages.

The invention relates to a preparation method of a high modulus asphalt-based carbon fiber. The preparation method comprises (1) carrying out high-pressure hydrogenation pretreatment on catalytic slurry oil under hydrogen pressure of 12-18Mpa at a reaction temperature of 420-450 DEG C for 1-3h to obtain a hydrogenation product, (2) carrying out vacuum distillation to separate a fraction at a temperature of greater than or equal to 400 DEG C and carrying out a polycondensation reaction process in an inert gas or nitrogen atmosphere at a reaction temperature of 460-500 DEG C for 6-8h to obtain a primary polycondensation product, (3) feeding nitrogen into the primary polycondensation product at a nitrogen flowing rate of 5-8L/(s. kg) under normal pressure and carrying out a reaction process at a reaction temperature of 450-500 DEG C for 4-6h to obtain high quality mesophase pitch and (4) carrying out melt spinning on the mesophase pitch and carrying out pre-oxidation, carbonization and graphitization to obtain the high modulus carbon fibers.

The asphalt roofing material is delivered into a treatment chamber of a processor. Hot oil is passed through a jacket surrounding the treatment chamber. Heated asphalt forms a hot solid and/or a liquefied slurry. The hot solid and/or the liquefied slurry is then removed from the treatment chamber. The asphalt roofing material in the treatment chamber can be agitated to promote mixing. The asphalt is heated to a temperature in the range from 200 degrees Fahrenheit to 650 degrees Fahrenheit within the treatment chamber. The solid and/or liquefied slurry is milled after it has been removed from the treatment chamber. The solid and/or the liquefied slurry is cooled after it exits the treatment chamber, preferably to a temperature in the range of approximately 90 degrees Fahrenheit to 110 degrees Fahrenheit. The hot solid and/or the liquefied slurry is passed through a hammer mill after the hot solid and/or the liquefied slurry exits the treatment chamber to reduce the particle size of the solid particles.

Carbon fiber bundles may be dispersed into substantially single mono-filaments in pitch by stirring a mixture of fibers and pitch at a temperature at which the pitch has a viscosity of about 0.1 to about 5 poise. The resulting fiber pitch binder contains about 0.5 to about 10.0 wt. % carbon fibers substantially dispersed as substantially single mono-filaments which are randomly oriented which may then be used directly as a binder for producing carbon bodies, for example, graphite electrodes, pinstock or specialty graphite articles. This unique binder using an economical amount of carbon fibers has the capacity to increase the strength and reduce the coefficients of thermal expansion of the resulting carbon products in more than one direction due to the random orientation of the carbon fibers.

A pavement repair system is provided utilizing Solid Phase Auto Regenerative Cohesion (SPARC) Homogenization by Liquid Asphalt Oligopolymerization (HALO) technologies. The SPARC-HALO system is suitable for use in repairing asphalt pavement, including pavement exhibiting a high degree of deterioration (as manifested in the presence of potholes, cracks, ruts, or the like) as well as pavement that has been subject to previous repair and may comprise a substantial amount of dirt and other debris (e.g., chipped road paint or other damaged or disturbed surfacing materials). The HALO system is suitable for rejuvenating aged asphalt, thereby improving properties of the paving material.

The invention provides a preparation method of petroleum-based mesophase pitch having a uniform molecular structure and a low softening point. The method comprises carrying out reduced pressure distillation on catalytic cracking oil slurry of naphthenic crude oil, taking a fraction having a boiling point of 380 and 540 DEG C as a raw material, carrying out a reaction process at a temperature of 380 to 450 DEG C under pressure of 4 MPa for 1 to 14 hours to obtain petroleum asphalt having a softening point of 110 to 180 DEG C, adding 1 to 15wt% of a hydrogen donor into the raw material, carrying out a self-pressure reaction process at 380 to 420 DEG C under nitrogen initial pressure of 5MPa for 1 to 8h, reducing the pressure to the normal pressure, cooling the product to 350 DEG C, carrying out high purity nitrogen purging for 0.5h to obtain hydrogenated asphalt, and carrying out a reaction process on the hydrogenated asphalt at 400 to 480 DEG C under pressure of 4MPa for 2 to 16h to obtain high quality mesophase pitch. The preparation method has simple processes and realizes a low production cost. The petroleum-based mesophase pitch has anisotropic structure content greater than 98%, a lower softening point of 230 to 250 DEG C, has a large basin type optical structure and good spinnability and is an excellent precursor for production of high modulus carbon fibers.

A process for producing pitch from pitch precursors, such as wood tar, coal tar or petroleum fractions is disclosed. Direct contact heat exchange of the pitch precursor with molten metal, preferably maintained as a metal continuous bath, heats the pitch precursor to a temperature sufficient to induce thermal polymerization reactions and produce a pitch product.

A process for fractionating crude pitch by direct contact heating with molten metal is disclosed. The crude pitch, which may contain water, contaminants and/or distillables is heated by direct contact heat exchange with molten metal, preferably maintained as a metal continuous bath, operating at a temperature of 100 to 600° C. The molten metal heating zone is maintained at a temperature and pressure sufficient to vaporize a desired amount of contaminants or volatile material from crude pitch to produce pitch product having a desired softening point. New pitch materials, having a softening point above those achievable by conventional techniques, are also produced.

A method of making coated carbonaceous particles comprising: providing a carbon residue forming material; providing particles of the carbonaceous material; mixing the carbon residue forming material with the particles of the carbonaceous material at an elevated temperature; depositing a coating of carbon residue forming material thereon; and stabilizing the coated particles by subjecting the coated particles to an oxidation reaction. These coated carbon-containing particles are particularly suitable for the production of electrodes in accumulators, especially rechargeable accumulators.

The invention discloses an asphalt crushing and melting equipment for municipal construction, which comprises a non-melting slag discharge pipe, a heating sleeve, a grinding roller, a fixed breaking hammer and an asphalt melting tank. A support frame is installed at the bottom of the asphalt melting tank. The upper end of the melting tank is connected to the asphalt input pipe; the top of the asphalt melting tank is equipped with a stirring motor, the rotating shaft of the stirring motor is connected to the rotating shaft through a coupling, and the rotating shaft is installed vertically inside the asphalt melting tank, and the top of the rotating shaft is welded Breaker, the bottom side of the rotary breaker is equipped with a number of rotating breaker teeth, and the bottom side of the rotary breaker is equipped with a fixed breaker; it realizes the convenient addition of asphalt blocks and avoids clogging; it realizes grinding treatment and further crushing, which is convenient for asphalt Block melting operation; realize the separate discharge of non-melting slag and asphalt melt, improve the effect and quality of asphalt melting; it is beneficial to the melting of asphalt, the heat transfer oil circulates, and the heating effect is good.

A solar energy-assisted patch cart with a support surface for carrying and heating bituminous materials, a heating source located adjacent to the support surface, and a battery powered at least in part by solar energy for igniting a burner associated with the heating source. Preferably, a charge controller is used to maintain the battery with a predetermined level of charge. The solar energy may be supplied by one or more retractable solar panels in electric communication with the battery.

The invention relates to a melting and stirring system in the building material industry, in particular to a lake asphalt melting and stirring system for treating naturally mined lake asphalt solidified into solid state. The lake asphalt melting and stirring system comprises a heat insulating stirring pot, and also comprises a melting device communicated with the pot body of the heat insulating stirring pot; the melting device comprises a melting bin with a first heating unit and a second heating unit installed on the outer wall; the second heating unit is provided with a gap part for the lake asphalt molten into liquid to flow into the heat insulating stirring pot; and the lake asphalt enters the heat insulating stirring pot after the completion of melting. Both the heat insulating stirring pot and the melting device can be used for continuous production, and intermittent shutdown is avoided, so that the yield is improved, and as only the melting device is subject to high-temperature heating, the temperature of the heat insulating stirring pot keeps low, not all the asphalt is subject to high-temperature heating, and energy consumption is reduced.

A material feed system for melter kettles which provides an area for a tender to load material to be charged into a melter kettle at a location which is safely remote from a flame conductor assembly that allows any flames or gasses that build up in melter kettle to be released. The material feed system also includes an air intake duct through which free air is allowed to enter into the melter kettle so as to equalize pressure with the atmosphere and/or burn off any superheated material.

The thermal decomposition of Athabasca asphaltene at relatively low (<350° C.) temperatures is believed to proceed by elimination of groups situated on peripheral sites of the asphaltene. More severe degradation of the asphaltene structure does not occur until elevated (>350° C.) temperatures are attained.

The invention relates to a treatment device, in particular to an asphalt treatment device used after petroleum refining and aims to provide an asphalt treatment device which is used after petroleum refining, can save time and labor, has a good stirring effect and can purify toxic gases during stirring without affecting the surroundings. In order to solve the technical problems, the asphalt treatment device used after petroleum refining comprises support legs, a box body, a first box cover and the like, wherein the support legs are symmetrically mounted at lower parts of left and right side surfaces outside the box body, a feeding port is formed in the middle of the top of the box body, and the first box cover is arranged at the bottom of the box body. The stirred asphalt can be molten by a melting device, manual asphalt melting is not required, a purification device can purify toxic gases without affecting the surroundings, time and labor are saved, the stirring effect is good, toxic gases can be purified during stirring while the surroundings are not affected.

The invention provides an application of a heavy product with a boiling point at 350-410 DEG C prepared through a lignite thermal melting catalysis technology as a raw material in preparing a mesophase pitch and a preparation method of the mesophase pitch. The preparation method comprises the following steps: taking the heavy product with the boiling point at 350-410 DEG C prepared through the lignite thermal melting catalysis technology as the raw material, and then performing thermal polycondensation, reduced pressure distillation, hydrogenation reaction, flashing and heat sensitization, thereby acquiring the mesophase pitch. The content of raw quinoline insolubles in the mesophase pitch product can be extremely reduced; the conversion of hydrogenated pitch into the mesophase pitch can be boosted; the loss of high-value components in the reaction process can be obviously reduced; the yield and quality stability of high-quality mesophase pitch product can be promoted; light componentsare removed by flashing, so that all hydrogen-donor solvent can be recycled; continuous production can be realized; lastly, the high-quality mesophase pitch product with mesophase pitch content not less than 61.2%, softening point at 274-282 DEG C and yield not less than 99.3% can be prepared.

The invention discloses a manufacturing technique of modified tar, which comprises the following steps: heating tar segment by segment; evening heat conductive oil to modify; cooling to generate steam; moulding tar.

The invention discloses biological asphalt for road. The biological asphalt is prepared from the following raw materials in percentage by weight: 10-30% of biomass heavy oil, 60-84% of matrix asphalt, 5% of methanol and 1-5% of low density polyethylene. The biological asphalt provided by the invention is low in cost, convenient to prepare, good in performance and high-temperature property, and low in temperature sensitivity; in addition, the invention further discloses a preparation device of the biological asphalt for road; the device includes a horizontal base, a liftable support pillar, a heating cup, a stirring cup, a feeding device and a control box; the device is simple in structure, reasonable in design, convenient to operate and good in use effect, and can simply and quickly complete the preparation of the biological asphalt; meanwhile, the invention also discloses a preparation method of the biological asphalt for road; the method includes the following steps: I, heating the matrix asphalt; II, adding low-density polyethylene; III, adding biomass heavy oil; IV, adding methanol; the method is simple in steps, reasonable in design and simple to operate; the prepared biological asphalt is excellent in performance.