337 results about "Radium" patented technology

A method of chemically extracting radium-228, rare earth metals, thorium, the decay products of thorium, and phosphates from thorium-containing ores. The method involves breaking thorium-containing ore into fragments, wetting the fragments with a concentrated strong acid to make a slurry, heating the slurry, passing the heated solution through a first anion exchange column, retaining metals and radium-228 captured on the resin, allowing the radium-228 ions to decay to actinium-228, purifying the actinium-228 fraction, sending the actinium-228 fraction through a capture column, eluting the captured thorium-228 with acid, removing radium from the solution, retaining the radium-228 fraction for isomer in-growth, retaining decay products from the radium-228, separating the REEs from the process stream; and eluting and retaining the REEs.

Methods and apparatus are disclosed for remediating metal contaminants using hydrocarbons which stimulate the growth of hydrocarbon-utilizing bacteria. The metal contaminants may include heavy metals such as arsenic, antimony, beryllium, cadmium, chromium, copper, lead, mercury, iron, manganese, magnesium, radium, nickel, selenium, silver, thallium and zinc. The hydrocarbon may include alkanes, alkenes, alkynes, poly(alkene)s, poly(alkyne)s, aromatic hydrocarbons, aromatic hydrocarbon polymers and aliphatic hydrocarbons. Butane is a particularly suitable hydrocarbon which stimulates the growth of butane-utilizing bacteria. Remediation may occur in-situ or ex-situ, and may occur under aerobic, anaerobic or dual aerobic/anaerobic conditions. Examples of applications include the remediation of heavy metals, the remediation of arsenic impacted surface water, groundwater and/or soil, the remediation of acid mine drainage, and the treatment of spent metal plating solutions.

A method for treating low barium frac water includes contacting a frac water stream with a radium selective complexing resin to produce a low radium stream, passing the low radium stream through a thermal brine concentrator to produce a concentrated brine; and passing the concentrated brine through a thermal crystallizer to yield road salt.

The invention is a method for using the secondary laser method to generate the white light source, it uses light source which can emit out ultraviolet and purple light (wavelength is 360-420nm), such as the illuminant diode (LED) and radium (LD), excites the blue fluorescence powder to emit out the primary excited light spectrum of the wideband whose main peak is blue light, then, the primary excited light spectrum excites the yellow fluorescence powder whose stage energy is lower, the secondary excited light spectrum can be emitted out whose main peak is yellow, through adjusting the proportion of the two kinds of fluorescence powder, the primary excited light spectrum and the secondary excited light spectrum can generate the complementary effect, and generate the whole spectrum white light; additional, there also can add in the red fluorescence powder and the green fluorescence powder excited by the ultraviolet light or the purple light, in order to adjust the color and the color temperature of the white light, and it can adjust the light source of other different color.

Provided herein are systems and methods for use in wastewater treatment. In some examples, the systems and methods involve different combinations of ion exchange and membrane based systems and processes that can be used to remove radium and recover and purify barium and strontium salts to render the wastewater depleted of those regulated toxic metals. Treated wastewater having less than 12000 pCi/L of any of radium, barium or strontium is then subjected to tertiary treatment where it is subjected to processes in an evaporator/crystallizer which drives out water in the form of vapor, leaving behind salts of innocuous metals such as sodium, calcium, and magnesium, among others. In some examples, water vapor from the processes is condensed to produce water suitable for reuse, such as reuse in the hydro-fracturing process.

The invention provides a method for the treatment of soft tissue disease in a mammalian subject (preferably a human or canine subject), said method comprising administering to said subject a therapeutically effective quantity of a soft tissue targeting complex of thorium-227 and a complexing agent, wherein said quantity is such that an acceptably non-myelotoxic quantity of radium-223 is generated in vivo by nuclear decay of the administered thorium-227.

A multicolumn selectivity inversion generator separation method has been developed in which actinium ions, a desired daughter radionuclide, are selectively extracted from a solution of the thorium parent and daughter radionuclides by a primary separation column, stripped, and passed through a second guard column that retains any parent or other daughter interferents, while the desired daughter actinium ions and radium ions elute. This separation method minimizes the effects of radiation damage to the separation material and permits the reliable production of radionuclides of high chemical and radionuclidic purity for use in diagnostic or therapeutic nuclear medicine.

The invention discloses a modeling method for buddhist pines, which comprises the following steps: 1, selecting raw materials; 2, planting; and 3, modeling. When the method is used, the modeling time of the buddhist pines is reduced greatly, and with the branch and trunk encircling modeling of the branches and trunks, the bud parts on the tops of the tree branches are uniformly erected, so the plumpness of leaves is increased and secondary modeling in next year or the year after next year is avoided. Thus, the buddhist pines can be sold immediately when modeled. In the invention, the buddhist pines are naturally modeled, and various models such as refined model, water-side model and opened model are available. The model of each tree may vary with the raw material, so that the single form situation of a Yuanchuan school is changed. After being reconstructed by a root controller, the conveying radium of seedlings is greatly prolonged from the original 300 kilometers and the marketability of the goods is improved greatly.

A method of recovering daughter isotopes from a radioisotope mixture. The method comprises providing a radioisotope mixture solution comprising at least one parent isotope. The at least one parent isotope is extracted into an organic phase, which comprises an extractant and a solvent. The organic phase is substantially continuously contacted with an aqueous phase to extract at least one daughter isotope into the aqueous phase. The aqueous phase is separated from the organic phase, such as by using an annular centrifugal contactor. The at least one daughter isotope is purified from the aqueous phase, such as by ion exchange chromatography or extraction chromatography. The at least one daughter isotope may include actinium-225, radium-225, bismuth-213, or mixtures thereof. A liquid-liquid extraction system for recovering at least one daughter isotope from a source material is also disclosed.

A method of producing an isotope comprising directing electrons at a converting material coated with a coating material, the coating material having an atomic number of n, whereby interaction of the electrons with the converting material produces photons, and whereby the photons produced interact with the coating material to produce an isotope having an atomic number of n-1. In preferred embodiments, the converting material is Tungsten, the coating material having an atomic number of n is Radium-226, and the isotope having an atomic number of n-1 is Radium-225.

The invention discloses a system and method for determining the position and the coverage radium of APs (access points) of a WIFI (wireless fidelity) network. The system comprises WIFI network nodes and an upper layer system server 102, wherein the WIFI network nodes are used for receiving AP identifications from the APs and network identifications corresponding to the WIFI network to which the APs belong, and determining AP identifications corresponding to APs which do not belong to the WIFI network in the received AP identifications; the WIFI network nodes send position measurement requests to the determined APs corresponding to the AP identifications, and receive position information returned by the corresponding APs; the WIFI network nodes send the determined AP identifications, the network identifications corresponding to the WIFI network to which the APs belong and the position information returned by the corresponding APs to the upper layer system server 102; and the upper layer system server 102 is used for correspondingly recording the received AP identifications, the network identifications of the belonged WIFI network and the position information. According to the invention, the determination of the positions of the APs which do not belong to the WIFI network as well as the efficiency and the comprehensiveness of the coverage radium is improved.

By sequentially aligning various filtration media and delivery systems, enhanced synergistic reduction of water contaminants is obtained compared to the prior art or separate use of the individual media/filters. Specific filtration media are formulated with proper proportioning and sequencing to enhance the ability to reduce metals that cause staining, odors and bad taste such as iron, copper and manganese. Also disclosed is the reduction of potentially hazardous metal radionuclides metals such as uranium, iodine, cesium, plutonium and radium. Also disclosed is improved removal of heavy metals such as arsenic, lead, chromium, and mercury as well as organic compounds such as halogenated carcinogenic compounds. The present devices and methods remove specific bacteria and their toxins from water to reduce the risk of dermatitis. Thus, the present invention enhances our ability to achieving cleaner and safer water for drinking, swimming, washing, bathing and cooking.

The invention provides a method and device for optimum design of oil field gathering and transportation systems. The method comprises the following steps of: determining an initial position of a booster station according to a gathering and transportation radium, a number of oil wells under administration of the station, a station yard processing scale and a length sum of pipelines of the oil wellsunder the administration of the station yard; optimizing the initial position of the booster station according to the length sum of the pipelines of the oil wells under the administration of the station yard and a weighting coefficient, so as to obtain an optimized position of the booster station; determining an optimum topological form of a series pipe network according to the optimized positionof the booster station and positions of the oil wells, so as to ensure that the length sum of the pipelines of the oil wells under the administration of the station yard is the shortest; and determining pipe diameters and wall thickness parameters of the pipelines according to the optimum topological form. According to the method and the device, an objective method and theoretical basis are provided for the layout of stations of series pipe network gathering and transportation systems and the optimum design and planning of pipeline connection and parameters, so that the defects of subjectivejudgment relaying on personal experiences and habits are avoided, and benefit is brought to reduce construction investment and operation expenses of the gathering and transportation systems.

The invention discloses a gradient-doped manganese iron oxalate precursor and a preparation method thereof. The chemical structural formula of the gradient-doped manganese iron oxalate precursor is Fe1-x-yMnx{M}yC2O4.2H2O, M is a doped element, the concentration of M outwardly increases from the center along the radium in a gradient manner, x is not lower than 0.4 and not greater than 0.9, and y is not lower than 0.02% and not greater than 5%. Gradient doping in a bulk phase in the invention realizes uniform mixing of iron and manganese atoms, and the concentration increasing gradient distribution of the doped element M from the core to the shell improves the ion conductivity, the electron conductivity, the cycle performances and the rate performance of the above material, and a new approach is provided for the large scale application of lithium manganese iron phosphate.

The invention provides a video semantic analysis method based on a self-adaption probability hypergraph and incremental semi-supervised learning. The video semantic analysis method based on the self-adaption probability hypergraph and the semi-supervised learning comprises the steps that (S1) a hypergraph model is established by means of a self-adaption probability hypergraph establishment method, (S2) the semi-supervised learning is conducted on the hypergraph model by means of the spectrogram segmenting principle, (S3) a semi-supervised model based on the self-adaption probability hypergraph is perfected by means of an increment mechanism, and (S4) semantic analysis is conducted on a tested video by means of the perfected hypergraph model. According to the video semantic analysis method based on the self-adaption probability hypergraph and the semi-supervised learning, the establishment of the self-adaption probability hypergraph and an incremental semi-supervised learning method are combined for use, the sensibility to a radium parameter when an ordinary hypergraph model is established is eliminated, and the accuracy and the robustness of the model are improved; in addition, under the incremental semi-supervised learning mechanism, semantic searching accuracy and semantic searching completeness are improved remarkably.

The invention discloses a route planning grid space partitioning method for an unmanned aerial vehicle. The route planning grid space partitioning method comprises the steps that firstly, the flying height and related maneuvering parameters of the unmanned aerial vehicle in the task executing process and the performance constraint parameters of a vehicle body in the flying process of the unmanned aerial vehicle are obtained; secondly, a safe flying speed passage of the unmanned aerial vehicle under the task flying height is obtained; thirdly, speed partitioning is carried out in the safe flying speed passage, the maximum flying speed is taken, the minimum turning radium and the three-dimensional grid unit length under the maximum flying speed are obtained, and whether a result meets the performance requirement or not is judged; fourthly, the three-dimensional grid unit length meeting performance constraints and the number of three-dimensional grids of a task scene are obtained. According to the route planning grid space partitioning method, grid partitioning meeting maneuvering performance constraints is carried out on the task scene in the task planning stage before high-speed flying of the unmanned aerial vehicle, the minimum turning radius of the unmanned aerial vehicle is determined before route planning, and the smooth processing step after route planning of the unmanned aerial vehicle is omitted.

The invention provides a method for treating alkali wastewater containing uranium, which comprises the following steps: (a) adding Ca(OH)2 into the alkali wastewater containing uranium and enabling concentration of CO32- and HCO3- in the alkali wastewater containing uranium to be reduced be less than 0.1mg/L, (b) filtering obtained the alkali wastewater containing uranium in the step (a), adding FeSO4 into filtrate and adjusting potential of hydrogen (pH) value in a range of 7.0-9.0, (c) adding BaCl2 into obtained alkali liquid containing uranium in the step (b) to performing coprecipitation and radium removing, and (d) aging obtained alkali liquid containing uranium in the step (c), performing the step (b) to aged alkali liquid containing uranium, and performing neutralization reaction together with the filtrate. After 5-10 times of cycling aging, finally-obtained alkali liquid containing uranium is filtered to obtain filtrate and filter residues. By means of the method, uranium content in wastewater can be reduced to be less than 0.05 mg/L, radium content can be reduced to be less than 1.1 Bq/L, standard wastewater discharge can be completely achieved, and residues are small in quantity and easy to dispose.

This invention provides a producing method of high lever fatty acid lubricant, which consists of unfreezing the high lever fatty acid, adding the emulsifying agent, then the talked high lever fatty acid can be emulsified to translucence latex, next the dispersant is added into the solution to stable, and the alkali compound is added and mixed to react for 4-8 hours at 50-95deg.C, at last the producer is dispersed, homogenized to get the high lever fatty acid lubricant. The advantage of this invention not only has small particle radium and low viscidity, but also the stability is good and the usage volume is low. Because the particle radium of this invention is small, the contrast surface area is large, so during the high speed coating, the dope can disperse homely, the fluidity and even is good. It can effectively solve the draw of current stearic acid calcium lubricant.

The invention discloses a supported catalyst for preparing dimethyl carbonate with urea and methanol. The catalyst is prepared from the following components by weight: 40%-75% of an alkaline earth metal modified MFI molecular sieve, 15%-30% of active metal oxide, and 10%-20% of phosphorus pentoxide; in the alkaline earth metal modified MFI molecular sieve, the weight of an alkaline earth metal accounts for 0.3-2% of the weight of the MFI molecular sieve; the MFI molecular sieve is a ZSM-5 molecular sieve preferably; the alkaline earth metal comprises beryllium, magnesium, calcium, strontium, barium or radium, and preferably magnesium or calcium; the active metal oxide is zinc oxide and/or cerium oxide. The catalyst can overcome the defects in the prior art that the equilibrium conversion rate is low and a homogeneous catalyst is not easy to separate in the technology of adopting urea and methanol to prepare dimethyl carbonate; the yield of dimethyl carbonate is high.

The patent refers to the field of 'compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare-earth metals'. The invention belongs to the technical field of nanomaterials, and in particular relates to a method for synthesizing nano cerium oxide with different morphologies by a hydrothermal method. The method comprises the following steps of: 1) preparing aqueous solution of Ce(NO3).6H2O with concentration of 0.01 to 0.1mol/L at the room temperature; 2) adding H2O2, aqueous solution of cerium nitrate and an organic solvent into the solution to form mixed solution according to a volume ratio of 1:1-8:1-10, wherein the organic solvent can be volatized into gas at the reaction temperature and does not participate in the reaction; 3) placing the mixed solution into a high-temperature reaction kettle and reacting the mixture at the temperature of between 140 and 240 DEG C for 2 to 72 hours; and 4) pouring off upper solution after the reaction and adding ethanol for dispersion, wherein the nano cerium oxide is directly settled at the bottom of the reaction kettle. Because any surfactant is not added, and residues are not remained after hydrogen peroxide serving as an oxidant is added for reaction, the post-treatment process required by the conventional nano preparation process can be saved and the industrial application of the nanomaterial is dramatically promoted.