397 results about "Thallium compounds" patented technology

A dual-energy x-ray imaging system searches a moving automobile for concealed objects. Dual energy operation is achieved by operating an x-ray source at a constant potential of 100 KV to 150 KV, and alternately switching between two beam filters. The first filter is an atomic element having a high k-edge energy, such as platinum, gold, mercury, thallium, lead, bismuth, and thorium, thereby providing a low-energy spectrum. The second filter provides a high-energy spectrum through beam hardening. The low and high energy beams passing through the automobile are received by an x-ray detector. These detected signals are processed by a digital computer to create a steel suppressed image through logarithmic subtraction. The intensity of the x-ray beam is adjusted as the reciprocal of the measured automobile speed, thereby achieving a consistent radiation level regardless of the automobile motion. Accordingly, this invention provides images of organic objects concealed within moving automobiles without the detritus effects of overlying steel and automobile movement.

A down hole cutting tool includes a cutting element support structure. The cutting element support structure has at least one cavity formed therein. A cutting element is disposed in the cavity. Braze alloy is also disposed in the cavity between the cutting element and the cutting element support structure. The braze alloy comprises between about 0.5% and about 10% by weight of at least one selected from the group of gallium (Ga), indium (In), thallium (Tl). Methods for building a down hole tool using the braze alloy are also disclosed.

A braze alloy is described which includes indium and/or thallium as alloying elements. For example, between about 0.5% and about 10% by weight of indium (In) and/or thallium (Tl) can be added to a braze alloy to reduce the braze temperature without substantially effecting braze strength. Braze alloys that are alloyed to including indium (In) and/or thallium (Tl) can be use in brazing cutting elements to drilling tools. These alloying elements may also be added to braze alloys used for other applications to reduce braze temperature.

A compact includes a mixture of a solid binder and at least one nanopowder phosphor chosen from yttrium oxide, yttrium tantalate, barium fluoride, cesium fluoride, bismuth germanate, zinc gallate, calcium magnesium pyrosilicate, calcium molybdate, calcium chlorovanadate, barium titanium pyrophosphate, a metal tungstate, a cerium doped nanophosphor, a bismuth doped nanophosphor, a lead doped nanophosphor, a thallium doped sodium iodide, a doped cesium iodide, a rare earth doped pyrosilicate, or a lanthanide halide. The compact can be used in a radiation detector for detecting ionizing radiation.

A thallium-free high pressure ceramic metal halide lamp having superior dimming characteristics with a fill composition comprising MgI2 and CeI3. In addition, the fill chemistry comprises NaI and the halides of rare earth metals such as Dy, Ho and Tm.

The invention utilizes the characteristics that tin has two states of bivalence and tetravalence in the solution, and the difference of the pH values is great when the tetravalent tin and trivalent indium ions precipitate in the solution, so the tetravalent tin and trivalent indium ions can be controlled under a certain pH value; oxidant is utilized to oxidize tin ions into tetravalence to generate hydrolysis precipitation, while indium still remains in the water solution, thus achieving the complete separation of indium from tin. At the moment, the tin contained in the indium solution is lowered to 2ppm, aluminium cutter replacement can be directly carried out after vulcanization to ensure that the content of tin, cadmium, thallium and lead is less than 100 PPM, and the content of indium is greater than 99%; while the oxidized tin dregs return and leach, and finally coarse tin oxide can be obtained for sale after washing and roasting the leached dregs, and the grade of indium content is lower than 0.2%.

The invention discloses a process for removing thallium from thallium-containing heavy metal wastewater through neutralization and flocculation. The process comprises the following steps: performing primary treatment, namely adjusting the pH value of thallium-containing heavy metal wastewater to be more than 7through acid and alkali, adding an efficient coagulant, sulfide and a flocculant, and performing solid-liquid separation through a slanting board sedimentation pool; performing secondary treatment, namely adding sulfide, diatomite and the flocculant into supernatant purified water after primary treatment, and performing solid-liquid separation through the slanting board sedimentation pool; adjusting the purified water subjected to secondary treatment to be neutral, adding iron salt, and finally filtering through a filter and directly discharging to the outside. Due to the adoption of the technical scheme, the removal rate of thallium and other heavy metal ions in the heavy metal wastewater can be effectively increased, the environmental pollution can be avoided, and the medicament cost can be reduced.

A catalyst composite is disclosed. Also disclosed is its use for dehydrogenation reactions. The catalyst composite comprises a Group VIII noble metal component, a Group IA or IIA metal component, and a component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium, or mixtures thereof, all on an alumina support comprising essentially theta-alumina, having a surface area from 50 to 120 m2/g, an apparent bulk density of at 0.5g/cm3 and a mole ratio of the Group VIII noble metal component to the component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium or mixtures thereof in the range from 1.5 to 1.7.

A scintillator composition is described, including a matrix material and an activator. The matrix material includes at least one alkali metal or thallium; at least one alkaline earth metal or lead; and at least one halide compound. The activator is usually cerium, praseodymium, or mixtures thereof. Radiation detectors which include the scintillator composition are also described. Methods for detecting high-energy radiation also form part of this disclosure.

The invention provides a catalyst for preparing olefin from low-carbon alkane by dehydrogenation. The catalyst comprises an aluminum oxide carrier and the following active components with the carrier as datum by mass: 0.1 to 2.0% of a group-VIII metal, 0.1 to 2.0% of a second metal component, 0.5 to 5.0% of a group-IA metal and 0.3 to 10.0% of halogen, wherein the aluminum oxide carrier has a pore volume of pores with a diameter of 2 to 10 nanometers accounting for 4 to 15% of a total pore volume, a pore volume of pores with a diameter of 10 to 20 nanometers accounting for 40 to 60% of the total pore volume, a pore volume of pores with a diameter of 20 to 50 nanometers accounting for 1.0 to 5.0% of the total pore volume, and a pore volume of pores with a diameter of more than 50 nanometers and less than 10 microns accounting for 20 to 50% of the total pore volume; and the second metal component is selected from the group consisting of tin, germanium, lead, indium, gallium or thallium. The catalyst is applied to preparation of propylene from propane by dehydrogenation and has high activity and selectivity and low coke deposition rate.

A method of readily producing a gradient optical element having infrared absorbing ability by easily forming a refractive index distribution in a desired portion of a glass substrate having infrared absorbing ability without requiring a specific treatment atmosphere nor using a molten salt.

More specifically, the present invention provides a method for producing a gradient-index optical element having infrared absorbing ability, the method comprising applying a paste containing an organic resin, an organic solvent, and at least one compound selected from the group consisting of lithium compounds, potassium compounds, rubidium compounds, cesium compounds, silver compounds, copper compounds, and thallium compounds onto a glass substrate containing an alkali metal component, at least one member selected from the group consisting of iron, copper, cobalt and vanadium, and over 3 wt. % of iron, when contained singly among iron, copper, cobalt and vanadium, on an Fe₂O₃ basis, taking the total weight of the glass as 100 wt. %, and heating the glass substrate at a temperature below the softening temperature of the glass substrate.

The invention discloses a water treatment method for removing Tl<+> and/or Cd2<+> by producing nanometer iron and manganese oxides in situ, relating to a water treatment method of thallium and/or cadmium-containing source water and solving the problems of complex process, high running cost and low removing efficiency of thallium and/or cadmium existing in the conventional water treatment technology specific to thallium and/or cadmium-polluted source water. The method comprises the following steps of: adding permanganate and ferrous salt into Tl<+> and/or Cd2<+>-containing water; stirring to obtain a mixed solution; adding a coagulant; and performing conventional water treatment. A nanometer ferric hydroxide-manganese dioxide oxide composite adsorbent which has a large specific surface area and high electronegativity and is easy for precipitation separation is produced in situ by making permanganate react with the ferrous salt, so that Tl<+> and/or Cd2<+> can be removed effectively andspecifications in the national Sanitary Standard for Drinking Water are met. The method has the advantages of high removing efficiency, simple process, flexibility and convenience for operation, no change of the original treatment process of a water plant, low running cost and the like, and can be applied to emergency treatment of a water pollution event.

A heteropolyacid catalyst for oxidation of isobutyraldehyde, methacrolein or mixtures or combinations thereof to methacrylic acid is disclosed where the heteropolyacid catalyst includes at least molybdenum (Mo), phosphorus (P), vanadium (V), and a first component including bismuth (Bi) and/or boron (B). The heteropolyacid catalyst can also optionally include a second component including potassium (K), rubidium (Rb), cesium (Cs), and/or thallium (Tl) and optionally a third component including antimony (Sb), cerium (Ce), niobium (Nb), indium (In), iron (Fe), chromium (Cr), cobalt (Co), nickel (Ni), manganese (Mn), arsenic (As), silver (Ag), zinc (Zn), germanium (Ge), gallium (Ga), zirconium (Zr), magnesium (Mg), barium (Ba), lead (Pb), tin (Sn), titanium (Ti), aluminum (Al), silicon (Si), tantalum (Ta), tungsten (W), and/or lanthanum (La). The heteropolyacid catalyst can also include an ammonium-containing compound designed to increase a value of medium pores in the final heteropolyacid catalyst. A method for oxidizing isobutanal to methacrylic acid using the heteropolyacid catalyst is also disclosed.

The invention provides a method for simultaneous removal of cadmium and thallium in raw water. The method comprises the following steps: step A, adding sodium hydroxide into raw water, adjusting a pH value to alkalescence and then adding potassium permanganate with a concentration of 0.3 to 0.8 mg/L; step B, adding sodium hypochlorite or liquid chlorine, wherein the concentration of added sodium hypochlorite or liquid chlorine is 0.5 to 2.5 mg/L in term of effective chlorine; step C, adding limewash into raw water having undergone a full oxidation reaction and adjusting a pH value to 8.5 to 9.0; step D, adding a flocculating agent, carrying out a flocculation reaction for 10 to 20 min and then carrying out deposition for at least 0.5 h so as to remove cadmium, thallium and colloids of manganese hydroxide and iron hydroxide through coprecipitation, wherein the pH value of water after precipitation drops to 7.0 to 8.5; and step E, filtering raw water obtained after precipitation by using quartz sand. The invention has the following beneficial effects: cadmium concentration of treated water is as small as the limit of a detection method, i.e., 0.02 mu g/L, or less than 0.02 mu g/L; thallium concentration of treated water is as small as the limit of a detection method, i.e., 0.01 mu g/L, or less than 0.01 mu g/L; and the pH value, manganese ions and iron ions of the treated water all meet requirements prescribed in drinking water quality standards.

The invention discloses a method adopting a combined technology of pre-oxidation and coagulating sedimentation to process wastewater containing thallium and ammonia-nitrogen. According to the method, a sodium hypochlorite oxidizing agent is added into a wastewater collecting tank so as to oxidize metal ions in wastewater, the monovalent thallium is fully oxidized into trivalent thallium, monovalent thallium is converted into complex under the effect of strong oxidant, and at the same time, the nitrogen in ammonia-nitrogen is degraded and removed in the form of nitrogen gas. After pre-oxidation, the wastewater is lifted to an integral processing facility through a self-sucking pump; ferrous sulfate and poly aluminum chloride (PAC) are added to form alumen ustum flocculus in a precipitation unit, the precipitate is wrapped, the thallium complex is adsorbed, then quicklime is added to adjust the solution to an alkaline environment; in the alkaline environment, Fe<3+>, Al<3+>, and prepolymer products thereof carry out hydrolysis quickly to form Fe(OH)3 flocculus and Al(OH)3 flocculus; before the flocculus becomes big, the adsorption sites on the surface of flocculus form covalent bonds with Ti<3+>, the flocculus becomes bigger and bigger very quickly and goes on absorbing Ti<3+> in water; at the same time, Ti<3+>, Fe<3+>, Al<3+>, Zn<2+>, lead, and cadmium carry out co-precipitation reactions, and thus the heavy metal ions in water are removed.

The invention belongs to a thallium-containing heavy metal wastewater advanced treatment method. The method comprises the following steps: (1) pretreating thallium-containing heavy metal wastewater: adjusting the pH value of wastewater to 9.5-11.5 with alkaline, and adding a chemical thallium removing agent according to the mass ratio of the chemical thallium removing agent to thallium of (0.5-1.5):1; (2) medicating according to the mass ratio of the chemical thallium removing agent to wastewater after the reaction in step (1) for 15-30 minutes, and carrying out mixed reaction for 15-30 minutes; (3) adding liquid alkaline into the solution obtained from the step (2), adjusting the pH value to 11.0-11.5, reacting for 10-20 minutes, adding 5-50g/m<3> of flocculating agents, reacting for 10-20 minutes, carrying out solid-liquid separation by oblique plate deposition or plate frame press filtration, standing for 1-2 hours, and discharging or recycling supernate. The thallium contained heavy metal wastewater treatment method is simple in process, has no secondary pollution, is high in treatment efficiency, runs stably and low in cost, and has very high practicability.

The invention discloses a method for removing metal thallium in wastewater, and the method is applicable to process wastewater with the thallium content of 0.05 mg/L or less. The method comprises the steps: step 1, oxidizing, namely, adding a strong oxidant into thallium-containing wastewater, so as to oxidize monovalent thallium ion in wastewater to form trivalent thallium ion; step 2, precipitating, namely, adding an alkali solution and adjusting the pH value to be 12 or more, so as to perform precipitation; and step 3, coagulating and adsorbing, namely, filtering, then adjusting pH of the filtrate to be 6-9, and pouring an adsorbent for coagulation and adsorption. The method is a comprehensive processing technology employing oxidation, precipitation and coagulation adsorption, is capable of guaranteeing the removal effect of thallium ion, has the removal rate of 97% or more, enables processed water to reach national discharge standard, also gives consideration to both investment and running cost, and is convenient for running and maintenance.

The invention which belongs to bioengineering and bioseparation engineering fields relates to a method for preparing and extracting carotenoid from microbial thalli. The method comprises the following steps: fermenting the microbial thalli, separating the resulting fermentation solution and the thalli to obtain wet thalli, guiding the wet thalli to an explosion tank through a material flow pipeline, and carrying out high-pressure explosion wall breaking; dehydrating the wet thalli with disrupted cells to obtain a filter cake formed by thallium fragments; adding 10-25L of an organic solvent to each 1kg of the filter cake, and carrying out stirring extraction at 30-55DEG C for 20-50min; filtering to obtain an organic solvent extraction containing carotenoid grease; and carrying out vacuum concentration on the extraction at 40-60DEG C, and recovering the organic solvent to obtain the carotenoid grease. The extraction yield one time reaches above 90%. The method has the advantages of omission of dehydration drying and thallium crushing operations in traditional technologies, short process flow, high extraction yield and short time each time, reduced organic solvent application amount, substantially reduced energy consumption and other costs, simple whole process, and controllable quality, and is suitable for industrialized production applications.

A thermoelectric material and a method of using a thermoelectric material is provided. The thermoelectric material can include at least one compound. For example, the at least one compound may be a Group IV-VI compound such as lead telluride. The at least one compound may further include one or more dopants such as sodium, potassium, and thallium. The method of using a thermoelectric material can include exposing at least one portion of the at least one compound to a temperature greater than about 700 K.

The invention provides a thallium-containing wastewater strongly oxidizing, coagulating, adsorbing and recovering process. The process includes the following procedures: thallium-containing wastewater concentration, pH regulation, strong oxidization, coagulation, flocculation, precipitated sludge treatment, pH regulation, solid impurity filtration, removal of Zn, Pb, Cd and Tl, and the like. The process has the beneficial effects that the process has the advantages of advanced technology, maturity, good effluent quality, stability in operation, conciseness in process, strong practicability, easiness in start and stop, convenience in maintenance and management, small investment, low operating cost, small floor area for construction, short construction period and large application ranges of projects; treatment of heavy metal ion polluted sewage is not limited by temperatures; the limitation that a biological method can not be used in cold regions in the north can be overcome.

The embodiment of the invention discloses an X-ray detecting panel and a preparation method thereof, relates to the field of detecting instruments, and provides the X-ray detecting panel with non-thallium-doped scintillator film layer as the scintillator. The injuries of thallium and iodide thereof to human bodies can be avoided, and meanwhile the preparation cost of the X-ray detecting panel is greatly reduced. The X-ray detecting panel comprises a lining substrate, a switch array arranged on the lining substrate, a photoelectric detector array arranged on the switch array, a cover plate, a scintillator film layer arranged on the cover plate, and a colloid quantum dot film layer arranged between the scintillator film layer and the photoelectric detector array, wherein the scintillator film layer is used for converting X-rays into near ultraviolet light, the colloid quantum dot film layer is used for converting near ultraviolet light converted by the scintillator film layer into visible light to be output, and the photoelectric detector array is used for converting the visible light converted by a wavelength converting unit into electric signals to be output.

A [thallium free] high pressure ceramic metal halide lamp having superior dimming characteristics with a fill composition including MgI2 and/or MgBr2.

A method of fabricating a liquid for an oxide thin film is provided, which includes mixing at least two kinds of dispersoids selected from the group consisting of a Zinc compound, an Indium compound, a Gallium compound, a Tin compound and a Thallium compound, with dispersion media corresponding to the selected dispersoids to form a dispersion system, and stirring and aging the dispersion system at a predetermined temperature for a predetermined time, wherein a molar ratio of the Zinc compound to each of the Indium compound, Gallium compound, Tin compound and Thallium compound is 1:0.1 to 1:2. According to the present invention, the liquid for the oxide thin film may be fabricated by a sol-gel method making it capable of being implemented in mass production in a simple and low-cost manner as opposed to the conventional vacuum deposition method.