38results about How to "Economic recovery" patented technology

This invention relates to a process for preparing bioabsorbable oxidized cellulose comprising combining cellulose material, with nitrogen dioxide and a nonaqueous solvent chosen from the class of perfluorinated tertiary amines. This invention also relates to a method of oxidizing cellulose material comprising introducing a solvent into the vessel, circulating the solvent through the cellulose material, adding nitrogen dioxide to said vessel containing the solvent and cellulose in the required amounts, circulating the solution for 7 to 24 hours while controlling the reaction temperature, and isolating the oxidized material. Preferably, isolation of the oxidized product is followed by first washing the oxidized cellulose material with cold water, then washing the oxidized cellulose material with an aqueous alcohol solution several times, then washing the material with 100% alcohol several times, and finally drying the oxidized material.

This invention relates to a process for preparing bioabsorbable oxidized cellulose comprising combining cellulose material, with nitrogen dioxide and a nonaqueous solvent chosen from the class of perfluorinated tertiary amines. This invention also relates to a method of oxidizing cellulose material comprising introducing a solvent into the vessel, circulating the solvent through the cellulose material, adding nitrogen dioxide to said vessel containing the solvent and cellulose in the required amounts, circulating the solution for 7 to 24 hours while controlling the reaction temperature, and isolating the oxidized material. Preferably, isolation of the oxidized product is followed by first washing the oxidized cellulose material with cold water, then washing the oxidized cellulose material with an aqueous alcohol solution several times, then washing the material with 100% alcohol several times, and finally drying the oxidized material.

The present invention is natural gas steam reforming apparatus for generating an output gas mixture of carbon dioxide and hydrogen. The apparatus is made from two enclosures. A first enclosure contains a source of water, superheated steam, and channels, located within a lower portion of the first enclosure, which contain a water-gas-shift catalyst for converting CO into CO2 and H2. The heat from hot gas flowing through the channels is released into the first enclosure to boil the water to generate the superheated steam. A second enclosure, contained within an upper portion of the first enclosure, includes a steam inlet for receiving the superheated steam from the first enclosure; a combustion chamber; and a reformation chamber. The combustion chamber is used for combusting a portion of the natural gas to generate additional steam, heat, and a hot gas mixture of CO2, CO, and H2. The reformation chamber is used for steam reforming a remaining portion of the natural gas to generate additional hot gas mixture of CO2, CO, and H2. The hot gas mixture is directed through the channels installed in the first enclosure in which the water-gas-shift catalyst converts residual CO into additional CO2 and additional H2, to produce an output gas mixture of carbon dioxide and hydrogen. In the present invention, the first and second enclosures function as a top-to-bottom linear countercurrent heat exchanger. In one embodiment of the present invention, an external third enclosure containing a combustion chamber and a boiler for combusting natural gas with ambient air may be used to boil additional water into superheated steam which is then fed into the first enclosure.

A hybrid evolutionary algorithm (“HEA”) technique is described for automatically calculating well and drainage locations in a field. The technique includes planning a set of wells on a static reservoir model using an automated well planner tool that designs realistic wells that satisfy drilling and construction constraints. A subset of these locations is then selected based on dynamic flow simulation using a cost function that maximizes recovery or economic benefit. In particular, a large population of candidate targets, drain holes and trajectories is initially created using fast calculation analysis tools of cost and value, and as the workflow proceeds, the population size is reduced in each successive operation, thereby facilitating use of increasingly sophisticated calculation analysis tools for economic valuation of the reservoir while reducing overall time required to obtain the result. In the final operation, only a small number of full reservoir simulations are required for the most promising FDPs.

The present disclosure relates to isolation, identification and application of Thauera strain AL9:8 which grows on crude oil as the sole carbon source under denitrifying anaerobic conditions Thauera strain AL9:8 can be used alone or in concert with other microorganisms to improve oil recovery, bioremediation of oil or hydrocarbons in contaminated soil, ground water or bodies of water, such as lakes, rivers or oceans and / or applying to method for promoting oil pipeline maintenance, removing a build up hydrocarbon on the intersurfaces of the pipeline.

The present invention relates to a process for recovering hydrogen along with high temperature high pressure carbon dioxide from one or more hydrocarbon gas streams by incorporating a carbon dioxide recovery unit which utilizes a fluidized magnesium based sorbent into a process that includes a gasification unit, an optional sulfur removal unit, a water gas shift reactor and a hydrogen pressure swing adsorption unit.

The present invention is a natural gas steam reforming method for generating an output gas mixture of carbon dioxide and hydrogen, including the following steps. (1) Combusting a portion of the natural gas with an oxidizing agent to generate heat, superheated steam, and a gas mixture of carbon dioxide, carbon monoxide, and hydrogen. (2) Steam reforming the gas mixture with additional superheated steam under steam-rich conditions to transform a remaining portion of the natural gas into carbon dioxide, carbon monoxide, and hydrogen. (3) Water-gas-shifting any residual carbon monoxide into additional carbon dioxide and additional hydrogen by utilizing a water-gas-shift catalyst downstream of the steam reforming step, thereby producing an effluent gas mixture that is predominantly carbon dioxide and hydrogen. (4) Boiling water in a top-to-bottom linear countercurrent heat exchanger to generate the superheated steam by transferring heat released in the water-gas-shifting step, where as the water is gravitationally and thermally stratified from top to bottom with a top portion boiling into steam, the steam continues to rise and is additionally heated in the top-to-bottom linear countercurrent heat exchanger. (5) And, utilizing the superheated steam produced as a reactant in the steam reforming step and the water-gas-shifting step to assist in reformation of the natural gas into carbon dioxide and hydrogen.

The invention discloses a repair process for a bearing base shaft hole. The repair process is characterized by comprising the following requirements that 1, the abrasion depth of the shaft hole is detected, and if the abrasion depth is smaller than 4 mm in the diameter direction, to-be-repaired parts are polished and deepened through an electric tool; 2, the to-be-repaired surface of a bearing hole is cleaned through a cleaning agent, and an outer ring of a bearing is sprayed with a layer of a release agent so that disassembling of the bearing can be facilitated; 3, the bearing is positioned, and a shaft and the bearing are assembled together with glue; and 4, the back half portion of the outer ring of the bearing is coated with a repairing agent, the coating amount should ensure that the position between the outer ring of the bearing and the shaft hole cannot lack the glue, the bearing coated with the repairing agent is pushed into the shaft hole and cured for 8-16 hours at the temperature of 30 DEG C-50 DEG C, corners are trimmed through abrasive cloth or a file, and the bearing base shaft hole can be used after being completely cured. The repair process for the bearing base shaft hole is reasonable in process, low in cost, reasonable and coordinated in parameter collocation, short in time and easy to operate.

The invention relates to a method for degrading polychlorinated biphenyl in soil by utilizing mixed powder of zero-valence iron and magnesium metals. The method comprises the following steps of: adding the mixed powder of iron and magnesium metals with the mol ratio of 0.4-0.8 into a polychlorinated biphenyl-polluted soil sample, adding NH4Cl or NH4NO3 solution with the mass fraction of 0-10% to regulate the humidity of the soil, and standing and reacting for more than 1 hour at room temperature, thus the polychlorinated biphenyl in the soil is degraded and the degrading efficiency reaches more than 98%. In the method, the reaction raw materials are available, the reaction conditions are simple, and the operation is easy, thus the method has good economic benefit and environmental benefit and has a better application prospect in the large-area polychlorinated biphenyl-polluted soil repairing.

The invention discloses a repairing technique for a vertical reducer body. The repairing technique includes the following requirements: (1) surface treatment: <1> clearing old paint to expose a reducer body, removing an original welding blocking by a flat shovel, and machining a crack into a 45-degree V-shaped groove by a grinding wheel; and <2> rust and stain clearing, performing washing with gasoline, and then performing wiping with acetone for 3-5 times, and drying in air; (2) sticking technique: <1> hole repairing, pasting 3 layers of glass cloth to the inner side of a hole with a repairing agent, wherein the diameter of the first layer of the glass cloth is 4-5 cm greater than that of the hole, and the second layer and the third layer of the glass cloth are 4-5 cm greater than the previous layer respectively; and <2> crack repairing, filling the repairing agent in the V-shaped groove of the crack, performing curing at the indoor temperature for 24 hours, performing leveling through filing, then pasting three layers of glass cloth to the inner side and the outer side with the repairing agent, and performing ground flush after 12 hours. The repairing technique is reasonable in processes, is low in cost, is reasonable and coordinated in parameter collocation, is short in time, and is simple in operation.

Provided is a method for selectively extracting and inexpensively recovering scandium from an acidic solution containing calcium, magnesium, and scandium. The scandium extraction method according to the present invention involves subjecting an acidic solution containing calcium, magnesium, and scandium to solvent extraction using an extraction agent consisting of an amide derivative represented by the general formula below. In the formula, R1 and R2 represent the same or different alkyl groups, and R3 is a hydrogen atom or alkyl group. The amide derivative preferably consisting of one or more derivatives selected from glycine amide derivatives, histidine amide derivatives, lysine amide derivatives, and aspartic acid amide derivatives. The pH of the acidic solution is preferably pre-adjusted to between 1 and 4.

The invention relates to a pyrolysis plant and a process for recovering (recycling) carbon fibers from carbon fiber-containing plastics, in particular from carbon fiber-reinforced plastics (CFPs or CFP materials), preferably from carbon fiber-containing and / or carbon fiber-reinforced composites (composite materials).

The invention discloses a method for repairing heavy metal-contaminated soil. The method comprises: using acrylic acid modified chitosan as a repairing agent, placing the polluted soil in an aqueous repairing agent solution for stirring and eluting, or applying the aqueous repairing agent to Plow and harrow the paddy fields to be plowed to transfer the heavy metals from the contaminated soil to the eluate, so as to realize the remediation of heavy metal (Pb, Cr, Cu) contaminated soil. Acrylic acid-modified chitosan, a repairing agent, is prepared by Michael reaction between chitosan and acrylic acid. It has the advantages of environmental protection, non-toxic, harmless, biodegradable, no secondary pollution, and rich sources of raw materials. The remediation agent has a good remediation effect on soil polluted by heavy metals, and the heavy metal content of the remediation soil reaches the first-class standard of farmland land. The chitosan derivative restoration agent adopted in the method is environmentally friendly, has good water solubility, and has a strong ability to chelate heavy metals.

The invention discloses a jacking and reinforcing method for a buckling reinforced concrete column. The method comprises the following steps: step one: manufacturing a steel bracket; step two: installing the steel bracket and a jacking device; step three: installing an unloading device; step four: arranging a laser range finder; step five: unloading the buckling reinforced concrete column; step six: jacking the buckling reinforced concrete column; step seven: chipping away a crushing area of the buckling reinforced concrete column and concrete near the area, and enabling a buckling reinforcedsteel bar to be exposed; step eight: welding a new reinforced steel bar at the edge side of the buckling reinforced steel bar; step nine: supporting and installing a template, preparing the high-strength fine aggregate concrete, and pouring a chipped area; step ten: restoring the reinforced concrete column; step eleven: implanting a new longitudinal bar and a spiral stirrup around the buckling reinforced concrete column after reinforced; and step twelve: restoring a frame beam and a floor. The reinforcing method is short in operation project period, rapid in efficacy, simple in construction process, and capable of realizing simple, efficient and economic repair to the buckling reinforced concrete column.

The invention discloses a repair process for cast micropores and cracks. The repair process is characterized by comprising the following steps that (1) water removing is conducted first on a casting in a heating mode, the casting is put into a drying oven, and heat preservation is conducted at the temperature of 120-150 DEG C for 2-4 hours; (2) after heating and water removing, the casting is cooled to 30-50 DEG C in a soaked mode and then put into a trough, an appropriate amount of a penetrant is added, and the casting is taken out after being soaked for 30 minutes; (3) after water removing, a 121 penetrant is dripped into the loose micropores, the 121 penetrant is dripped repeatedly for two to three times, the time interval is 5-10 minutes, and room temperature solidification is conducted for 8 to 10 hours; and (4) the residual 121 penetrant on the surface layer of the casting cannot be solidified and can be wiped away with cotton yarn after construction. The repair process is reasonable in working procedure and low in cost. All parameters are matched reasonably and harmoniously, time is short, and operation is simple.

The invention relates to a repair device, which includes a holder (32), a cutting tool (22) held by the holder (32) and having at least one cutting tooth (70) for re-machining an inner surface of thehole, the cutting tool (22) having a suction channel (44) extending into the cutting tool (22) between at least one inlet opening (46) and at least one outlet opening (48), a drive shaft (34) for rotating the cutting tool (22), the drive shaft (34) being held by the holder (32), and a suction tube (36) connected to the holder (32) and fluidly coupled to the outlet opening (48) of the suction channel (44).

A sulfonamide based rare earth element ion separation media and method of synthesis and use are provided. A bed or column of sulfonamide resin for separations can be prepared by exposing a sulfonate resin to chlorosulfonic acid to form a sulfonyl chloride resin; exposing the sulfonyl chloride resin to aqueous ammonia to form a sulfonamide resin; and then packing the sulfonamide resin into a separation column. Mixtures of lanthanide and other rare earth ions with very similar atomic radii and characteristics can be separated by flowing a mixture of lanthanide ions through a bed of sulfonamide resin followed by a mobile phase of an organic acid such as lactic acid to elute the separated rare earth element ions separated by the sulfonamide resin. Collected fractions of eluate can also be recycled through the sulfonamide media.

The present invention relates to an LNG optimum control reliquefaction system for recovering low-temperature waste heat of LNG generated in the LNG gasification process. According to the present invention, the gaseous LNG is supplied to the place where the gaseous LNG is required. At this time, in order to be able to supply in the LNG storage tank A sufficient amount of gaseous LNG makes the liquid LNG pass through the load heat exchanger of the cold and heat supply part of the logistics warehouse to discharge cold and heat, and thereby raise the temperature of the liquid LNG or vaporize the liquid LNG, and can heat up or gasify the liquid LNG in this way. By supplying the liquefied LNG to the supply line where the gaseous LNG is needed, it is possible to expand the use and popularization of cold and heat of LNG, and to optimally control the flow of liquid LNG and gaseous LNG for reliquefaction, thereby enabling economical recovery of LNG Low-temperature waste heat of LNG generated in the gasification process.