36 results about "Perrhenate" patented technology

The invention relates to alkyl imidazole perrhenate ionic liquid and a method for preparing the same. The adopted technical proposal is follows: the preparation method comprises the following steps: taking certain volume of alkyl imidazole chloride compounds or alky imidazole bromide compounds, adding deionized water the volume of which is 2 to 4 times of that of the alkyl imidazole chloride compounds or the alky imidazole bromide compounds to dissolve the alkyl imidazole chloride compounds or the alky imidazole bromide compounds, adding the mixture to OH-type anion exchange resin to perform ion exchange, and collecting outflow solution which is alkyl imidazole hydroxide; then adding the alkyl imidazole hydroxide to ammonium perrhenate aqueous solution, wherein the molar ratio of the alkyl imidazole hydroxide to the high ammonium perrhenate is between 1 to 1 and 1 to 2, then stirring the mixture for 3 to 5 hours at a temperature of between 70 and 90 DEG C, reducing the pressure and distilling the mixture to remove water, adding the mixed solution of anhydrous methanol and acetonitrile to the mixture after cooling the mixture, sealing and stirring the mixture intensely, keeping stand the mixture for 10 to 15 hours at a temperature of between 30 DEG C below zero and 40 DEG C below zero, reducing the pressure and distilling the mixture to remove the methanol and the acetonitrile, and performing vacuum drying on the treated mixture. The ionic liquid prepared by the method has the advantages of high yield and high stabilities of air and water.

The invention discloses a preparation method and application of a nano silver-bamboo shoot shell biochar composite material. The preparation method comprises the following steps: 1) granulation: pulverizing washed and dried bamboo shoot shells, and sieving; 2) carbonization: carbonizing the bamboo shoot shells at a certain temperature under an inert atmosphere and cooling to room temperature, taking out, washing with deionized water to neutral, and drying to prepare bamboo shoot shell biochar; 3) silver loading: mixing the bamboo shoot shell biochar and a silver nitrate-citric acid solution, dropwise adding an ascorbic acid solution, placing in a water bath and stirring, impregnating, filtering, washing, and drying; 4) activation: taking an appropriate amount of a product obtained in step 3), activating under an inert atmosphere for a certain period of time, then cooling to room temperature, washing to neutral, and drying to obtain the nano silver-bamboo shoot shell biochar composite material. The nano silver-bamboo shoot shell biochar composite material is prepared by the invention through utilizing the bamboo shoot shells of forestry and agricultural residue as a raw material; the raw material is rich, the preparation is simple, and the adsorption effect on perrhenate in a smelting waste acid solution is remarkable.

There is provided a hydrometallurgical process of recovering rhenium values from mixtures thereof with other metal values in which the rhenium values constitute a minority amount, for example super-alloys, which comprises subjecting the mixture to strongly oxidizing acid conditions, preferably an aqueous mixture of hydrochloric acid and nitric acid, so as to form perrhenate species of at least the major proportion of the rhenium values in the mixture, dissolving the perrhenate species and other soluble metal species in aqueous solution, removing insoluble metal species from the aqueous solution, and isolating the rhenium species from the solution.

Processes and systems for recovering promoter-containing compounds, for example, perrhenates, from promoter-containing catalyst substrates, for example, substrates containing precious metals, such as silver, are disclosed. The processes include contacting the substrates with a first solution adapted to remove at least some of the catalyst promoter from the substrates, for example, an oxidizing agent, to produce a second solution containing catalyst promoter, passing the second solution through a porous medium adapted to capture at least some of the catalyst promoter, for example, a ion exchange resin; and passing a third solution, for example, a base solution, through the porous medium to remove at least some of the catalyst promoter from the porous medium and produce a fourth solution containing compounds having a catalyst promoter. Systems adapted to practice these processes are also disclosed.

The invention discloses a formula of an acid plating solution for a rhenium iridium alloy coating on surface of a glass die and a preparation method thereof. The formula of the acid plating solution is characterized by comprising of 0.001-0.5mol / L of perrhenate, 0.001-0.45mol / L of sodium hexabromoiridate, 0.001-0.25mol / L of chloriridium acid hydrate, 0.001-0.95mol / L of oxalic acid treated as a complex or (and) 0.001-0.95mol / L of citric acid treated as the complex, and additives, wherein the additives include one or a plurality of 0.001-0.035mol / L of sulfuric acid, 0.001-0.045mol / L of nitrous acid, 0.001-0.020mol / L of hydrofluoric acid, and 0.001-0.015mol / L of hydrogen bromide. The preparation method comprises the steps of dissolving all the above-mentioned components in deionized water; adding 1.0-3.0mol / L of sodium hydroxide or 1.0-3.0mol / L of ammonium hydroxide solution to regulate the pH of electrolyze to be 1.5-6.5; and then electrolytically depositing a rhenium iridium alloy coating on the surface of a conductive die workpiece electrode through constant current or pulse, wherein the rhenium iridium alloy coating contains 1-85at% of iridium, the thickness of the coating is 1nm-100 microns, and the current efficiency is up to 50-90%, so that the amorphous or (and) nanocrystalline rhenium iridium alloy coating is obtained. The amorphous or (and) nanocrystalline rhenium iridium alloy coating is uniform in component distribution, high in combination intensity, outstanding in corrosion resistance, high in hardness, high in oxidation resistance, high in mechanical stability,resistant to abrasion, resistant to high temperature and releasability. Therefore, the service life of the glass die can be effectively prolonged.

A method of comprehensively recovering rhenium and copper from copper smelting waste acid is disclosed. The method includes subjecting the copper smelting waste acid after being filtered to remove lead to targeted rhenium settling to obtain rhenium-rich slag, subjecting the rhenium-rich slag to hot-press oxidation leaching to obtain a rhenium-rich leachate, evaporating and concentrating to make the rhenium concentration 10-20 g / L, performing rhenium settling with KCl, and recrystallizing to obtain potassium perrhenate, and subjecting the liquid after rhenium settling to sulfuration copper settling. The objective of the method is to overcome complex processes, long treatment time, low recovery rates, and other disadvantages of processes recovering rhenium and copper from copper smelting waste acid through leaching at present, and to form a process which is low in investment, simple in operation, high in recovery rate, low in cost, low in pollution and convenient for industrial popularization and application, thus achieving high-value utilization of the rhenium resource in the copper smelting waste acid.

The invention relates to novel aminocarboxylate ligands that are suitable for complexing with a radionuclide, and are useful as therapeutic agents and as imaging agents for diagnostic purposes. In accordance with the present invention, a method of preparing a compound of formula fac-[M(CO)3(OH2)3]+  (I) where M is MN, 99mTc, 186Re or 188Re, involves reacting a metal in permetallate form with carbon monoxide and stannous ion. The compound of formula (I) can be reacted with a ligand Lx to form a compound of the formula fac-[M(CO)3Lx]n  (II) wherein M is as defined above, Lx is a monodentate or multidentate ligand or a mixture of these ligands, and n is a charge of the ligand Lx increased with one+charge. The invention also is directed to novel compounds, and kits for carrying out the disclosed methods.

The invention relates to a method for recovering rhenium from metallurgical waste liquid. A precipitant is added into the rhenium-containing metallurgical waste liquid till the pH of the liquid is 8-12, filter pressing is conducted for separation, filter liquid is collected, and the pH of the filter liquid is adjusted to be 5-7; the filter liquid is pre-treated through a biological carbon adsorption tower, and thus coexisting ions are further removed; then the filter liquid enters a stirring reactor, and biological carbon is added to adsorb rhenium; after adsorption is conducted till saturation is achieved, stirring is stopped, filter pressing is conducted for separation, and a filter cake is taken to be sent into a calcinatory to be calcined; and calcined gas is absorbed through alkalineliquid to obtain a perrhenate product. According to the method for recovering rhenium from the metallurgical waste liquid, a novel technique is adopted to recover rhenium in the metallurgical waste liquid, and the method has the remarkable advantages that the technique is simple, the practicability is high, the investment is few, the operation cost is low, and the recovery rate is high.

The invention relates to a load type perrhenate ionic liquid based cellulose degradation method. According to the technical scheme, the method is characterized in that cellulose is dissolved in an ionic liquid solvent, and load type perrhenate ionic liquid in which ReO4<-> is used as negative ion is used as a catalyst for degrading; the degrading reaction is carried out for 10-60min at the temperature of 120-170 DEG C; and water is added to dilute reaction liquid after the reaction is finished, and then the dilute is filtered and separated. The method is simple; the catalyst is green, environment-friendly and easily recovered; the cellulose degrading effect is good.

The invention provides a method for recovering rhenium from an arsenic filter cake. The method comprises the following steps: entering rhenium, arsenic and sulfur into a solution by adopting one-section alkali leaching and second-section oxidization and leaching, and simultaneously enriching lead, bismuth, copper and selenium in leaching slag; in the one-section leachate, converting rhenium into perrhenate in a form of sodium thioperrhenate by adopting an oxidization method, converting sodium thioarsenate into sodium arsenate, and separating out sulfur in a form of simple substance sulfur; removing arsenic from the solution obtained by oxidization conversion by using a sulfur dioxide reduction method or lime method; carrying out rhenium enrichment on the solution obtained after arsenic isremoved; treating a rhenium reextraction liquid by using a potassium chloride precipitation method to obtain crude potassium perrhenate; and refining crude potassium perrhenate to obtain potassium perrhenate. The method has short process flow, high rhenium recovery rate and low treatment cost; and by using the method, the comprehensive utilization of valuable metals in the arsenic filter cake canbe realized.

The invention provides a cathode catalyst active material for a hydrogen fuel cell, a one-dimensional PtNiGaRe quaternary alloy nanowire formed by Pt, Ni, Ga and Re metal elements; and a one-dimensional PtNiGaRe quaternary alloy nanowire loaded on carbon A cathode catalyst for a hydrogen fuel cell can be obtained. Also provided is a preparation method of a quaternary alloy nanowire, which comprises dispersing Pt-containing salt, Ni-containing salt, Ga-containing salt, perrhenate and quaternary ammonium salt containing hexadecyltrimethyl molecular chain In oleylamine, ultrasonication forms a homogeneous system, and then adds W(CO) 6 Adding it into the above system at a certain temperature, reacting for a certain period of time, and then centrifuging and cleaning to obtain one-dimensional ultrafine PtNiGaRe nanowires. The quaternary one-dimensional alloy nanowire material of the present invention is a brand-new quaternary alloy catalytic system, which not only increases the utilization rate of platinum atoms on the surface, but also improves the activity and stability of the catalyst. The invention adopts the wet chemical method for the first time to synthesize the alloy nanowires of four metals in one step, not only the operation is simple, but also the reaction conditions are relatively mild, and the use of Pt can be greatly reduced.

The invention discloses a formula of an acid plating solution for a rhenium iridium alloy coating on surface of a glass die and a preparation method thereof. The formula of the acid plating solution is characterized by comprising of 0.001-0.5mol / L of perrhenate, 0.001-0.45mol / L of sodium hexabromoiridate, 0.001-0.25mol / L of chloriridium acid hydrate, 0.001-0.95mol / L of oxalic acid treated as a complex or (and) 0.001-0.95mol / L of citric acid treated as the complex, and additives, wherein the additives include one or a plurality of 0.001-0.035mol / L of sulfuric acid, 0.001-0.045mol / L of nitrous acid, 0.001-0.020mol / L of hydrofluoric acid, and 0.001-0.015mol / L of hydrogen bromide. The preparation method comprises the steps of dissolving all the above-mentioned components in deionized water; adding 1.0-3.0mol / L of sodium hydroxide or 1.0-3.0mol / L of ammonium hydroxide solution to regulate the pH of electrolyze to be 1.5-6.5; and then electrolytically depositing a rhenium iridium alloy coating on the surface of a conductive die workpiece electrode through constant current or pulse, wherein the rhenium iridium alloy coating contains 1-85at% of iridium, the thickness of the coating is 1nm-100 microns, and the current efficiency is up to 50-90%, so that the amorphous or (and) nanocrystalline rhenium iridium alloy coating is obtained. The amorphous or (and) nanocrystalline rhenium iridium alloy coating is uniform in component distribution, high in combination intensity, outstanding in corrosion resistance, high in hardness, high in oxidation resistance, high in mechanical stability,resistant to abrasion, resistant to high temperature and releasability. Therefore, the service life of the glass die can be effectively prolonged.

A method for labelling a sulfide compound with technetium or rhenium, comprising the reaction of a disulfide compound with pertechnetate or perrhenate in the presence of borohydride exchange resin to obtain a complex of technetium or rhenium with the sulfide compound. The method can directly label disulfide compounds with technetium or rhenium, can skip the synthetic step of thiol-protected S-precursor, and is useful for high value-added radiopharmaceuticals.

The invention relates to a supported perrhenate ionic liquid as well as a preparation method thereof. The technical scheme adopted is as follows: the preparation method comprises the following steps: selecting MCM-41 (Mobil Composition of Matters) as a carrier material; firstly, carrying out a reaction on chloropropyl triethoxysilane and the MCM-41; grafting a chloropropyl silicon structure to the surface of the MCM-41, and removing the byproduct ethanol; then, adding N-methyl imidazole so as to quaternize to obtain MCM-41 supported alkyl imidazole chlorine salt; and further adding ammonium perrhenate, and converting the chlorine salt into perrhenate through double-decompose reaction to obtain the MCM-41 supported alkyl imidazole perrhenate ionic liquid. The molar ratio of the reaction materials chloropropyl triethoxysilane, N-methyl imidazole, the MCM-41 and perrhenate is 1:(4-1):(3-1):(10-0.1). The method is applicable to support of various different types of alkyl imidazole perrhenate ionic liquids.