7940 results about "Pitch" patented technology

The present invention relates to low-cost, efficiently-manufactured, polymer-based products useful as roofing shingles and similar products. The inventive shingles are weatherproof, inexpensive to manufacture and durable, particularly as contrasted with conventional shingles in areas of the country subject to hail damage. The invention also includes a method of making such shingle products. In a preferred embodiment, products of this invention use rubber material as the polymer base in combination with specific types of polyolefins. The rubber material can be most efficiently provided by the use of crumb rubber particles from spent automobile tires and other recycled rubber debris which are readily available and of very low cost. The products will have an average life far greater than that of current commercial roofing shingles, which are made using fiberglass or asphalt.The products of the instant invention are produced by extrusion as a mixture of materials, which product and its materials can be summarized as follows as a roofing shingle product which comprises:a. one or more side-branched polyolefins as an elastomer;b. optionally a blend of additional synthetic polymers, such as ethylene and propylene, as a second elastomer; andc. a rubber fraction, preferably obtained in part from recycled spent automotive or truck tires, and similar sources of waste rubber (sometimes known as "crumb rubber"), ground or recycled into particles having a mesh size of from 10 to 30 (i.e., approximately from about 500 to about 1000 microns).

The invention discloses a hydrocracking treatment technique for coal tar total distillate, which comprises: first mixing with homogeneous catalyst, or adding impurity, gum, asphaltene and coal oil total distillate contained much oxygen element directly into suspended-bed hydrogenation device; cutting the stream with distilling plant to discharge water, distillate less than 370Deg that enters fixed bed reactor for hydrorefining reaction to cut gasolene less than 150Deg and diesel oil 150-370Deg, and tail oil less than 370Deg that recycles to said reactor and converts into light oil product. Compared with prior art, this invention is simple, but high conversion rate and stability.

The present invention relates to polysaccharides that have been modified by providing azetidinium functionality thereto. Such functionality can be provided by crosslinking a polysaccharide with a resin having azetidinium functional groups. In one or more aspects, the polysaccharide can comprise one or more of starch, guar gum, alginate or derivatives thereof. Polysaccharides having azetidinium functionality according to the present invention are suitable for multiple uses. Such uses include, but are not limited to, removal of one or more solid materials from a liquid, beneficiation of an ore, removal of metallic ions from a liquid; providing oil from bitumen; and removal of mercury from synthetic gypsum. Other uses of the functionalized polysaccharides of the present invention include hydroseeding, dust control and corosion control.

The invention belongs to the field of road engineering, and particularly relates to a hyperviscous and high-elastic asphalt modifier applicable to steel bridge deck pavement. The asphalt modifier comprises the following raw materials in parts by weight: 3-10 parts of junked tire rubber powder, 3-10 parts of polyethylene wastes, 3-8 parts of styrene-butadiene-styrene block copolymer, 1-5 parts of styrene-isoprene-styrene block copolymer, 1-5 parts of terpene resin, 5-10 parts of solvent naphtha, and 0.3-0.7 part of alcohol ether carboxylate adhesion agent. In addition, a modified asphalt and amodified asphalt mixture are prepared on the basis of the modifier, the 60 DEG C dynamic viscosity of the modified asphalt prepared by applying the modifier can reach more than 300000Pa.s, and the performance grading reaches PG 88-28; and the asphalt mixture has favorable water stability, higher dynamic modulus, higher track dynamic stability and low temperature failure strain, and can resist complicated mechanics and temperature environment of a steel bridge deck.

The invention discloses a high-sublevel subdivision mining method of a moderately thick heavy-pitch waste-rock-containing interlayer phosphate orebody along a strike. The high-sublevel subdivision mining method comprises four steps of exploiting, mining preparation, cutting and recovery, wherein a footwall intermediate-section main roadway is respectively arranged on a high sublevel along a top plate and a bottom plate of the orebody, and the intermediate-section main roadways of the top plate and the bottom plate are connected through a communication channel at intervals of 100m, therefore reduced roadway cutting construction, small development rate and simple process are achieved; after overall blasting of a stope is finished, a large amount of concentrated ore drawing is carried out, and the production efficiency is high; tail sand is adhered and filled after space pillars are mined first, then rooms are evacuated, and the rooms are filled with waste rocks or tail sand in a non-adhering way, thus recovery rate is high; and the high-sublevel subdivision mining method has little damage to the environment and capabilities of changing oredressing tail sand and waste rocks generated in open-air production into valuables and reducing geological disaster from happening. Due to the adoption of the high-sublevel subdivision mining method disclosed by the invention, ore recovery rate can be increased, ore dilution rate and emission of mine wastes are reduced, capacity of slag disposal pit is relatively increased, expropriation of land is decreased, and mineral land harmony is promoted.

The invention discloses a preparation method of an alumina carrier with a composite pore structure, which comprises the steps of mixing and roasting an aluminum-contained compound and a composite template, wherein the composite template comprises a mesoporous template selected from at least one of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock polymer, polyethylene glycol, dodecylamine, hexadecyl trimethyl ammonium bromide, lauric acid, stearic acid and fatty alcohol polyoxyethylene ether and a macroporous particulate template selected from polystyrene microspheres with the particle size of greater than 50nm, polymethyl methacrylate microspheres, biomaterial particles, asphalt particles or heavy oil residues; and the weight ratio of the mesoporous template to the macroporous particulate template to the aluminum-contained compound (by alumina) is 0.1-2:0.1-0.7:1. The invention also discloses the alumina carrier simultaneously having mesoporous tunnels and macroporous tunnels prepared through the method, wherein mesopores account for 40-90% of the total pore volume, and macropores account for 10-60% of the total pore volume.

Methods to improve dewatering in industrial and municipal sludges are described. One method involves admixing sludge from a papermaking process and modified cellulose to provide modified sludge with the modified cellulose present in an effective amount to improve dewatering in the treated sludge, such as in allowing use of reduced amounts of coagulant and/or reducing dewatering times, increased dewatered volumes, and reduced sludge product moisture contents, and the like. The dewatered sludge may be formed into a dried particulate, and may be used as filler or other component of concrete, rubber, asphalt, plastics, resin-wood composite products, and other composite products.

The invention provides a preparation method and an application of an asphalt liquid phase coated modified artificial graphite lithium battery cathode material. The method comprises the steps of mechanically grinding petroleum coke, mixing with an appropriate amount of (3-8%) asphalt powder after stage treatment, performing reaction for 6-10h in a moderate temperature reaction kettle at 500-650 DEG C, performing reshaping stage treatment again, performing reaction for 36-72h at 2400-3000 DEG C for high-temperature graphitization treatment, finally obtaining an unmodified artificial graphite material through stage treatment, then further dissolving the unmodified artificial graphite material and asphalt in a dispersing agent, stirring to obtain uniform mixing liquid, preparing the uniform mixing liquid into composite powder with a closed cycle spray dryer, heating for 1-5h at 700-1100 DEG C, and finally obtaining the asphalt liquid phase coated modified artificial graphite material. After the asphalt liquid phase coated modified artificial graphite prepared by the method is applied to a lithium battery, the artificial graphite shows excellent electrochemical properties such as high first charge-discharge efficiency, high specific capacity and good cycle performance.

The invention provides a technology for preparing a needle coke raw material from coal-tar pitch. The technology comprises the following steps of 1, fully mixing asphalt and a solvent, and removing insoluble substances in the mixture by a physical separation method, wherein the solvent is a mixture of coal light oil and coal aromatic oil or is a mixture of BTX and coal aromatic oil; a mass ratio of the coal light oil or the BTX to the coal aromatic oil is in a range of (20: 80) to (95: 5); and a mass ratio of the solvent to the asphalt is in a range of 0.5 to 10, 2, feeding a clear liquor without the insoluble substances into a separator, and separating the light solvent from the clear liquor to obtain a heavy fraction having low QI, and 3, carrying out hydrotreatment on the heavy fraction in the presence of a hydrogenation catalyst at a temperature of 300 to 450 DEG C under the pressure of 5 to 20MPa. The needle coke raw material obtained by the technology has low sulfur content and a small expansion coefficient.

The invention discloses caulking asphalt for roads and bridges. The caulking asphalt is prepared from the following raw materials in percentage by mass: 60 to 85 percent of base asphalt, 5 to 15 percent of polymer A, 0 to 15 percent of polymer B, 3 to 10 percent of compatilizer and 0 to 3 percent of stabilizing agent. The caulking asphalt product for the roads and bridges is appropriate in needle penetration, high in softening point, heat resistance and extension, and flexibility at low temperature, and good in elastic recovery performance, is insoluble, and waterproof, does not flow at high temperature, and is resistant to impact at low temperature, does not crack and has high durability, and sandstone and sundries are prevented from being embedded into the caulking asphalt,; and the invention also discloses a preparation method for the caulking asphalt, and the preparation method is novel and simple, and is low in cost.

The invention belongs to the technical field of road engineering, in particular to a color asphalt binder capable of being directly applied and a preparation method thereof. The binder consists of 25 to 38 percent of petroleum resin, 12 to 22 percent of aromatic oil, 8 to 15 percent of styrene-butadiene triblock copolymer (SBS), 28 to 32 percent of color pigment, 5 to 10 percent of abherent, 0.05 to 1 percent of plasticizer, and 0.05 to 1 percent of antioxidant. The binder has a simple preparation method, can meet the technical index requirements of various building asphalts by adjusting the content of the petroleum resin, the content of the aromatic oil and the content of the styrene-butadiene triblock copolymer. Color asphalt binders in red, yellow, blue and other colors can be produced by regulating the color pigment. Furthermore, in the process of transporting the color asphalt binder, heating transportation is not required, and a special tanker for transportation is not required, so that the problems of low transportation efficiency and difficult operation of the color asphalt are solved. Meantime, the storage time of the solid particular color asphalt binder is greatly prolonged, and the color asphalt binder is convenient to apply, and has positive effect on popularization and application of color asphalt pavements.