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1038 results about "Rubidium" patented technology

Rubidium is a chemical element with the symbol Rb and atomic number 37. Rubidium is a very soft, silvery-white metal in the alkali metal group. Rubidium metal shares similarities to potassium metal and caesium metal in physical appearance, softness and conductivity. Rubidium cannot be stored under atmospheric oxygen, as a highly exothermic reaction will ensue, sometimes even resulting in the metal catching fire.

Catalyst for complete oxidation of formaldehyde at room temperature

The invention provides a high selectivity catalyst used for catalyzing and completely oxidizing formaldehyde with low concentration at room temperature. The catalyst can catalyze formaldehyde completely so as to lead the formaldehyde to be converted into carbon dioxide and water at room temperature. In addition, the conversion rate of formaldehyde remains 100% within a long period of time, without complex auxiliary facilities such as light source, a heating oven and the like, and external conditions. The catalyst comprises three parts which are inorganic oxide carrier, noble metal component and auxiliary ingredient. Porous inorganic oxide carrier is one of cerium dioxide, zirconium dioxide, titanium dioxide, aluminium sesquioxide, tin dioxide, silicon dioxide, lanthanum sesquioxide, magnesium oxide and zinc oxide or the mixture thereof or composite oxide thereof, zeolite, sepiolite and porous carbon materials. The noble metal component of the catalyst is at least one of platinum, rhodium, palladium, gold and silver. The auxiliary ingredient is at least one of the alkali metals of lithium, sodium, kalium, rubidium and cesium. The loading of the noble metal component used in the catalyst of the invention is 0.1 to 10% according to weight converter of metal elements and the selective preference is 0.3 to 2%. The loading of the auxiliary ingredient is 0.2 to 30% according to weight converter of metal elements and the selective preference is 1 to 10%. When the loading of the auxiliary ingredient is lower than 0.2% or higher than 30%, the activity of the catalyst for catalyzing and oxidizing formaldehyde at room temperature is decreased remarkably.
Owner:广东顺德中科鸿图环境材料有限公司

Automated strontium-rubidium infusion system

This invention relates to medical engineering, in particular, to means of automation of the process of generating a diagnostic solution from a radionuclide strontium-rubidium generator and performing of remote controlled infusion, with automatic control over the key characteristics of the process. The automated strontium-rubidium infusion system comprises a container with eluent, a strontium-rubidium generator with a filter and a pressure sensor at the input, an eluate infusion unit, which are connected by means of a transporting system provided with pipes and two three-way valves, radioactivity measuring means and a control and operating unit. Here, an eluent container is connected to a syringe pump via the first and second ports of the first three-way valve, the first port of the second three-way valve is connected with pipes via the second filter to the eluate infusion unit, and the second port is connected to a waste receptacle. The system additionally comprises the third and fourth three-way valves, the first and second air bubbles detectors are connected to the control and operating unit connected with a computer, where the third three-way valve is connected with its first and second ports via pipes to the third port of the first three-way valve and the input of the strontium-rubidium generator, respectively. The generator output is connected to the first port of the fourth three-way valve, where the third port of the third valve and the second port of the fourth valve are connected with a pipe, the first air bubbles detector is placed on the pipeline between the eluent container and the first port of the first valve, and the second air bubbles detector is placed on the pipeline between the third ports of the fourth and second valves.
Owner:OBSHCHESTVO S OGRANICHENNOY OTVETABTVENNOSTIU NAUCHNO PROIZVODSTVENNAYA FA POZITOM PRO

Method for producing refined lithium sulfate solution used in lepidolite lithium-extracting technique by sulfuric acid process

Provided is a process for producing refined lithium sulfate solution of lepidolite lithium extracting technology with sulfuric acid process, which takes lepidolite clean ore as raw material and sequentially includes the following steps, including leaching, alum cooling and decanting, acid removing, aluminum removing, decontaminating and deliming, thereby achieving refined lithium sulfate solution. The alum cooling and decanting process of the invention can precipitate kalium, rubidium and caesium in alum form, thereby the separation of lithium and kalium, rubidium and caesium is easily achieved, and the achieved alum dregs of kalium, rubidium and caesium are blend alum with high purity, which creates perfect condition for comprehensive utilization and simultaneously reduces the burdens of the separation of lithium and aluminum. The aluminum removing process can easily achieve the separation of lithium and aluminum. The process of the invention has the advantages that the energy consumption is relatively low, and the lithium yield is relatively high, most of the residues can be used and the process is favorable for comprehensive utilization. The invention further provides a process for producing lithium carbonate and lithium fluoride with the achieved refined lithium sulfate solution.
Owner:GANFENG LITHIUM CO LTD

Method for extracting alkali metal from salt lake brine and seawater through membrane extraction-back extraction

The invention discloses a method for extracting high-value alkali metal from salt lake brine or seawater through membrane extraction-back extraction. The method is implemented through continuous operation and comprises the following steps of: fixing an ion exchange blend membrane in a membrane component, allowing an organic solution containing an extracting agent to contact salt lake brine or seawater which contains alkali metal ions by a first ion exchange membrane, and allowing alkali metal ions to pass through the ion exchange membrane and be combined with the organic solution containing the extracting agent to obtain metal complex; then transmitting an organic solution of the metal complex to a second ion exchange membrane and allowing the organic solution of the metal complex to contact a back extraction solution by the second ion exchange membrane, and allowing the metal ions to pass through the ion exchange membrane to enter the back extraction solution; during membrane extraction-back extraction, and circulating feed liquid, the back extraction solution and the organic solution containing the extracting agent on one side of the first ion exchange membrane, on one side of the second ion exchange membrane and between the first and second ion exchange membranes; and performing back extraction until a certain concentration of the back extraction solution is reached, and separating lithium, rubidium or caesium precipitates to obtain the final product. The invention provides a high-efficiency, low-cost and feasible route for industrial production of alkali metal salts.
Owner:何涛 +1

Compositions and methods including formate brines for conformance control

Compositions and methods are provided for reducing the permeability of subterranean zones. More particularly, water-soluble polymeric compositions which form cross-linked gels in the zones. In general, the composition comprises (a) at least one water-soluble polymer; (b) at least one organic gelling agent capable of cross-linking the water-soluble polymer; and (c) at least one water-soluble formate. More preferably, the water-soluble polymer is a copolymer of (i) at least one non-acidic ethylenically unsaturated polar monomer, and (ii) at least one copolymerisable ethylenically unsaturated ester. The gelling agent is preferably selected from the group consisting of a polyalkyleneimine, polyfunctional aliphatic amine, an aralkylamine, and a heteroaralkylamine. The preferred water-soluble formate is selected from the group consisting of ammonium formate, lithium formate, sodium formate, potassium formate, rubidium formate, cesium formate, and francium formate. Water is used to make an aqueous composition prior to use in a subterranean formation. The methods of this invention for reducing the permeability of a subterranean zone are comprised of the steps of introducing an aqueous composition according to the invention into a subterranean zone, and then allowing the aqueous composition to form a cross-linked gel in the zone. Preferably, the method includes the step of subsequently producing hydrocarbons from the subterranean formation.
Owner:HALLIBURTON ENERGY SERVICES INC

A kind of preparation method of mems atomic vapor chamber and atomic vapor chamber

The invention relates to a preparation method for a micro-electro-mechanical system (MEMS) atomic vapor chamber and the atomic vapor chamber. The chamber is prepared by bonding a Pyrex glass sheet, a silicon wafer and a Pyrex glass sheet by an anodic bonding technology; the Pyrex glass sheet is taken as a window of the chamber; a chamber space is formed by etching or corroding the silicon wafer; paraffin packaged alkali metal such as rubidium (Rb) or cesium (Cs) is put into the chamber, and buffer gas with appropriate pressure is introduced simultaneously; paraffin is taken as a packaging material of the alkali metal, so that active alkali metal is isolated from oxidants such as oxygen, water vapor and the like in an environment; the paraffin is also used as a plating material of the chamber, so that collision between Rb or Cs atoms and a chamber wall is slowed down; and a CO2 laser is used for melting the paraffin to release the alkali metal, so that a uniform paraffin plating is formed on the chamber wall. The problem of long-term drift caused by reaction residues generated by a field preparation mode is solved, the collision between the Rb or Cs atoms and the chamber wall is slowed down, and the contrast of atomic resonance line width of the alkali metal is improved.
Owner:江苏智能微系统工业技术股份有限公司

Miniature atomic air chamber encapsulation apparatus and technology method

The invention discloses packaging equipment for a micro atomic gas chamber and a process technology method thereof. The equipment comprises a sample chamber, a pressure bar, a sample wafer, a sample stage, a heating wire, a temperature measurement probe, a vacuum pump connector, an inflation inlet, a direct-current high-voltage power supply, a voltmeter, a resistor, and other measurement and control devices. The method comprises: step 1, the selection of materials; step 2, the processing of the materials; step 3, the washing of the sample wafer; step 4, the bonding of a first surface; step 5, the bonding of a second surface; and step 6, the detection of a sample, and is a method which closes metal rubidium generated by adopting an in-situ chemical reaction method in a micro gas chamber. The method has the advantages that the special equipment is a common high vacuum system which is based on an anode bonding technology principle and adopts a relatively cheap mechanical pump, namely molecular pump air-bleed set; at the same time, inert gas is used to take measures such as the repeated inflation to the vacuum system to clean, the high temperature baking to the local sample wafer to remove gas and so on, to lighten the influence of residual gas and adsorbed gas as far as possible, particularly lighten the oxidation of rubidium.
Owner:PEKING UNIV

Method for extracting lithium from lepidolite

The invention relates to a method for extracting lithium from lepidolite, which comprises the steps of removing fluorine, pressing and soaking, separating, removing impurity, separating out natrium, analyzing kalium, separating, depositing lithium, separating, and separating crude wet lithium carbonate and lithium depositing mother liquid after depositing lithium. The invention is characterized in that the concentration of Rb+ contained by the lithium depositing mother liquid is detected, the circulation trend of the lithium depositing mother liquid is decided by the consistency, when the consistency is low, the product quality is not influenced, the lithium depositing mother liquid which is acidulated returns to the step of removing impurity before analyzing natrium, and when the concentration of the Rb+ is high and influences the product quality, the lithium depositing mother liquid is separated in an Rb and Cs product manufacturing procedure. The invention can avoid increasing the load of a pressing and soaking kettle when the lithium depositing mother liquid returns to the pressing and soaking step, and the content of natrium and kalium in the lithium depositing mother liquid which is finally educed is reduced to enable the subsequent separation of Rb and Cs to be easier, thereby the cost of whole technique comprising the processing cost of lithium carbonate, rubidium and cesium is greatly reduced.
Owner:GANFENG LITHIUM CO LTD

Method and device for extracting lithium from lapidolite by chloridizing roasting method

ActiveCN101775505ALow melting pointReduce or inhibit precipitationRubidiumPotassium
The invention discloses a method and a device for extracting lithium, which is used for preparing lithium carbonate, from a lapidolite ore by a chloridizing roasting method. The method comprises the following steps of: firstly, mixing the lapidolite ore, calcium chloride and sodium hydroxide with a compound bonding agent for pellet fabrication; secondly, performing chloridizing roasting in a square-frame shaped track type roasting furnace; thirdly, leaching out soot dust by using solution containing sodium carbonate and potassium carbonate to ensure that potassium, sodium, rubidium and cesium enter the solution and convert the lithium into lithium carbonate; fourthly, filtering the mixture to obtain a lithium carbonate solid, and circularly using the filtrated mother liquor to leach out the soot dust; fifthly, when an alkali metal salt is close to be saturated, indirectly heating the filtrated mother liquor by using the residual heat of the gas in the roasting furnace to evaporate part of water; sixthly, passing CO2 into the filtrated mother liquor to perform carbonation; and seventhly, performing cooling crystallization to separate out a mixed salt of the sodium carbonate and the potassium carbonate, returning part of the mixed salt which is used as an auxiliary material mixed and roasted with lapidolite for cyclic utilization, using another part of the mixed salt as a carbonate reagent needed in dissolution, and using the rest part of the mixed salt as byproducts of the sodium carbonate and the potassium carbonate. The method has the advantages of high lithium recovery rate, good material comprehensive utilization, large equipment productivity, high production efficiency, small water consumption in the process and less wastewater discharge.
Owner:CENT SOUTH UNIV

Method for extracting lithium and other alkali metal elements from lepidolite mineral

The invention discloses a high-temperature mineral phase reconstruction method for extracting lithium and other alkali metal elements from lepidolite mineral, comprising the following steps: mixing raw materials, pelletizing, calcining at high temperature, water quenching, ball milling, dissolving out, producing compounds and the like. The invention teaks raw mineral component composition to design target reconstruction mineral and composition to obtain the purpose of optimizing processes, lowering energy consumption and cost of treatment process and efficiently extracting lithium, potassium, rubidium, caesium and the like. Silicon and aluminum in lepidolite can enter anorthite type mineral phase (CaO.Al2O3.2SiO2, (Ca, Na)O. (Al, Si)2O3.2SiO2) and calcium ash quarry phase (CaO.SiO2) after mineral phase reconstruction, and do not dissolve in water and aqueous solution. After mineral phase reconstruction reaction, fluorine in lepidolite enters calcium fluoride mineral phase and does not dissolve in water and aqueous solution. Lithium and other alkali metal elements in lepidolite enter salt (chloride, sulfate) or alkali (hydroxide) phase of lithium and other alkali metal elements after mineral phase reconstruction reaction and can be dissolved in water and aqueous solution.
Owner:CENT SOUTH UNIV

Coproduction of hydrofluoroolefins

Disclosed is a process for the co-manufacture of the hydrofluoroolefins HFC-1225ye and HFC-1234yf. The process comprises contacting a blend of 1,1,1,2,3,3-hexafluoropropane and 1,1,1,2,3-pentafluoropropane at a temperature of from about 200° C. to about 500° C. with a catalyst, optionally in the presence of an inert gas. The catalyst includes, but is not limited to, aluminum fluoride; fluorided alumina; metals on aluminum fluoride; metals on fluorided alumina; oxides, fluorides, and oxyfluorides of magnesium, zinc and mixtures of magnesium and zinc and / or aluminum; lanthanum oxide and fluorided lanthanum oxide; chromium oxides, fluorided chromium oxides, and cubic chromium trifluoride; carbon, acid-washed carbon, activated carbon, three dimensional matrix carbonaceous materials; and metal compounds supported on carbon. The metal compounds are oxides, fluorides, and oxyfluorides of at least one metal selected from the group consisting of sodium, potassium, rubidium, cesium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, chromium, iron, cobalt, rhodium, nickel, copper, zinc, and mixtures thereof. The product hydrofluoroolefins are separated from unreacted hydrofluorocarbons and hydrogen fluoride. In another embodiment, the unreacted hydrofluorocarbons optionally may be recirculated back through the process.
Owner:EI DU PONT DE NEMOURS & CO
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