58results about "Ruthenium/rhodium/palladium/osmium/iridium/platinum halides" patented technology

The invention relates to a resource cyclic utilization method of rhodium-containing waste liquid of a butanol-octanol device. The cyclic utilization of effective sources, namely rhodium and triphenylphosphine is ensured and a useless resource, namely a waste solvent, is combusted and converted into energy for production, so that materials are put into the best use; tail gas generated by combustion is subjected to desulfurization treatment and denitration treatment and is discharged after reaching standards, so that the discharged gas is pollution-free and environment-friendly resource cyclic utilization is realized. In an important link of recycling of the rhodium, an absorption method is adopted and a loading type rhodium ligand and a waste rhodium catalyst are mixed and alternately used for absorbing; then the rhodium is displaced from a triphenylphosphine ligand. The method is little in investment, environmentally friendly and high in rhodium recycling rate; the triphenylphosphine is sufficiently recycled and economic benefits and market competitiveness are greatly improved.

The invention discloses a rapid dissolution method for indissolvable metal iridium. The method comprises the following steps: 1, adding iridium powder and hydrochloric acid into a reaction kettle, introducing a chlorine gas into the reaction kettle, and performing a reaction under certain reaction conditions; 2, after the reaction of the iridium powder, the hydrochloric acid and the chlorine gas is completed, reducing pressure of the reaction kettle to normal pressure, adding concentrated hydrochloric acid in batches, continuing a stirring reaction under the temperature condition of 70-90 DEGC for 1-5 h, removing a free chlorine gas in the reaction liquid, and performing cooling to room temperature; and 3, after the reaction system is cooled to the room temperature, performing solid-liquid separation, wherein the obtained filtrate is a chloroiridic acid solution. According to the method disclosed by the invention, a one-time dissolution leaching rate of the indissolvable metal iridiumpowder achieves 70% or more, and the dissolution method disclosed by the invention has the advantages of a simple process, a short process, a large processing amount and no introduction of impurity ions, and is a high-efficiency low-cost and environmentally-friendly method.

The invention relates to a production process of ruthenium trichloride. According to the process, RuO4 gas is produced according to a traditional method; diluted hydrochloric acid is adopted for absorbing the RuO4 gas till the concentration of Ru in the solution ranges from 59 g / L to 61 g / L, meanwhile, the pH value is adjusted to range from 1.9 to 2.1, and a ruthenium-containing solution is obtained; a dispersing solvent is added into the ruthenium-containing solution, the adding volume of the dispersing solution is 9.8-10.2% of the volume of the ruthenium-containing solution, and the dispersed ruthenium-containing solution is obtained; the dispersing solvent is a mixture of hydrogen peroxide, ethyl alcohol and acetone according to the volume ratio of 1:(7.9-8.1):(0.95-1.05), the obtained dispersed ruthenium-containing solution is spray-dried through a spray dryer, and ruthenium trichloride powder is obtained. A traditional production process of ruthenium trichloride is improved, continuous, large-scale and equipment production is achieved, and the purposes of being short in production period, low in cost and free of polluting the environment are achieved.

The invention discloses a method for preparing high-purity iridium trichloride. Iridium powder is used as a raw material to be subjected to alkali fusion under the mixing action of sodium peroxide, sodium hydroxide and sodium carbonate; dissolving the alkali fusion solid with aqua regia, adding ammonium chloride into the filtered solution to form precipitated ammonium chloroiridate, reacting the ammonium chloroiridate with hydrazine hydrochloride to form ammonium chloroiridate, further removing impurities by sodium sulfide and ammonium sulfide, filtering, oxidizing the filtrate by hydrochloric acid / hydrogen peroxide, and precipitating by an ammonium chloride solution to obtain ammonium chloroiridate with higher purity; the preparation method comprises the following steps: removing nitrate from ammonium chloroiridate by using an aqua regia solution, adding sodium nitrite / potassium chloride into the obtained chloroiridate solution, boiling to obtain a potassium hexanitroso iridate solid, filtering, adding hydrochloric acid into the solid, boiling, dissolving, removing nitrate, adding a proper amount of hydrazine hydrochloride, and carrying out rotary evaporation and vacuum calcination on the solution to obtain an iridium trichloride solid with the purity of more than 99.995%.

The invention relates to a production process of ruthenium trichloride. According to the process, RuO4 gas is produced according to a traditional method; diluted hydrochloric acid is adopted for absorbing the RuO4 gas till the concentration of Ru in the solution ranges from 59 g / L to 61 g / L, meanwhile, the pH value is adjusted to range from 1.9 to 2.1, and a ruthenium-containing solution is obtained; a dispersing solvent is added into the ruthenium-containing solution, the adding volume of the dispersing solution is 9.8-10.2% of the volume of the ruthenium-containing solution, and the dispersed ruthenium-containing solution is obtained; the dispersing solvent is a mixture of hydrogen peroxide, ethyl alcohol and acetone according to the volume ratio of 1:(7.9-8.1):(0.95-1.05), the obtained dispersed ruthenium-containing solution is spray-dried through a spray dryer, and ruthenium trichloride powder is obtained. A traditional production process of ruthenium trichloride is improved, continuous, large-scale and equipment production is achieved, and the purposes of being short in production period, low in cost and free of polluting the environment are achieved.

The invention relates to the technical field of three-waste treatment in chemical industry, in particular to a recovery process of a ruthenium trichloride catalyst in a trimethylpyruvic acid synthesis work procedure. The waste ruthenium trichloride catalyst is added into a solution and is heated and stirred; then, solid-liquid separation is performed; filter liquid is evaporated to obtain ruodium chloride hydrate; the ruodium chloride hydrate is subjected to heat insulation treatment in hydrogen chloride gas; great energy consumption and great waste water generating quantity of an alkali fusion method can be avoided. The recovered anhydrous ruodium chloride can be directly used in the trimethylpyruvic acid preparation work procedure after being compounded with kieselguhr.

The invention provides a method for preparing rhodium chloride through recovering rhodium from incinerated waste rhodium residues. The method comprises the steps of firstly carrying out aerobic high-temperature roasting on waste catalyst roasting rhodium residues with incompletely removed organic matters, thus thoroughly removing the organic matters, and obtaining rhodium ash; then adding hydrofluoric acid and perchloric acid into the rhodium ash for pretreating, adding hydrochloric acid and hydrogen peroxide for directly dissolving the rhodium residues, and filtering to obtain a coarse rhodium acid solution; finally adopting an ion exchange method for the coarse chlororhodic acid solution to remove ion impurities such as Fe, Ni and Ca, and then concentrating and drying to obtain rhodium chloride hydrate. According to the method provided by the invention, a roasted rhodium residue post-treatment process is simplified, the efficiency is high, the rhodium loss is less, and the rhodium yield is larger than 99 percent.

A method for recovering cobalt, ruthenium, and aluminum from spent Co—Ru / Al2O3 catalyst. First, Co—Ru / Al2O3 spent catalyst is subjected to hydrocarbon removal, reaction with hydrogen, and alkali fusion to obtain a slag. The slag is subjected to acid leaching, precipitation of cobalt with oxalic acid or ammonium oxalate, reduction of cobalt oxalate, and dissolution of cobalt metal with nitric acid to obtain Co(NO3)2.6 H2O. The effluent of acid leaching is subjected to reaction with ethanol, filtration to obtain a filtrate and residue, dissolution of the residue with concentrated hydrochloric acid, and vacuum distillation to obtain β-RuCl3.x H2O. Aluminum hydroxide is prepared from the filtrate through carbonation and calcination. The cobalt yield is ≧97%; the ruthenium yield is ≧95%, and the aluminum yield is ≧92%.

The invention discloses a continuous crystallization method of rhodium trichloride. The continuous crystallization method comprises steps as follows: a blending agent is added to an acid-soluble rhodium chloride solution for adjusting concentration and acidity, and a rhodium chloride solution with high concentration is obtained; the rhodium chloride solution with the high concentration is subjected to spray drying, and rhodium trichloride is obtained. Rhodium trichloride is good in acid solubility and water solubility, stable in product performance and good in consistency, has stable rhodium content, realizes uniform product particles and meets use requirements of catalyst precursors. With the adoption of the continuous crystallization method of rhodium trichloride, continuous production can be realized, the process is simple, the production cycle is short, environmental pollution is avoided, a productive-processing technique realizing reduction of metal loss is adopted, the production loss caused by the long production process is reduced, a precursor material which is more reliable and more convenient to use is provided for the rhodium catalyst industry, an industrial chain of the rare and precious metal industry is extended, market vacancy is filled up, and industrial development is promoted.

Fluorine or a fluorine compound is subjected to a reaction with a spent oxide fuel to produce fluorides of uranium and plutonium, and the fluorides are recovered using a difference in volatility behavior. The spent oxide fuel is subjected to a reaction with an HF gas, whereby uranium, plutonium and most impurities are converted into solid fluorides having low valences or remained as oxides to inhibit volatilization thereof, and then in an F2 fluorination step, the HF fluorination product is subjected to a reaction with a fluorine gas in two stages: one at a low temperature and the other at a high temperature, whereby a certain amount of gaseous uranium and volatile impurities are separated with plutonium kept in a solid form in the first stage, and mixed fluorides of remaining uranium and plutonium are fluorinated into hexafluorides at the same time in the second stage. By such a reprocessing method, plutonium enrichment can be adjusted, uranium and plutonium can be purified, and steps are simplified as well. In addition, reactors are hard to be corroded or deteriorated.

The invention discloses a preparation method of high-purity rhodium triiodide, which comprises the steps of putting a deionized water solution dissolved with a trivalent rhodium-containing raw material into an ultrasonic field, adding a hydroiodic acid solution into the solution to form a mixed solution, and carrying out primary ultrasonic treatment on the mixed solution; and adding hydrogen peroxide into the mixed solution, heating to completely volatilize elemental iodine generated in the reaction, stopping ultrasonic treatment to obtain a rhodium triiodide-containing solution, heating and concentrating the rhodium triiodide-containing solution, and crystallizing to obtain primary rhodium triiodide crystals. According to the preparation method, under ultrasonic radiation, complete reaction of trivalent rhodium and added hydroiodic acid is promoted, and crystal grains are uniform; ultrasonic radiation washing is carried out, impurities in rhodium triiodide crystals can be fully elutedby utilizing the cavitation effect of ultrasonic waves, and the product purity is effectively improved.

The invention relates to a method for comprehensively recycling catalyst mother liquor in propylene carbonylation. The method comprises the following steps: feeding devitalized catalyst mother liquoror catalyst mother liquor with reduced activity into a first adsorption column and a second adsorption column, then feeding into a buffer tank, and feeding into a butyraldehyde removing tower via thebuffer tank; pumping a base solution of the butyraldehyde removing tower into a high polymer removing tower; pumping concentrated triphenylphosphine mother liquor on the bottom of the high polymer removing tower into a reactor and carrying out low-temperature separation by crystallization on triphenylphosphine to obtain crude triphenylphosphine; washing triphenylphosphine solid with water at first, then dissolving the triphenylphosphine solid with ethanol, and carrying out evaporative crystallization to recycle triphenylphosphine; and carrying out evaporation concentration and crystallizationon a purified rhodium trichloride solution under the condition of vacuum to obtain reddish brown rhodium trichloride crystals. Pollution to the environment due to combustion in recycling of precious metal from the catalyst mother liquor and loss of butyraldehyde and triphenylphosphine in an incineration process or a nitrifying process of the catalyst mother liquor by a large amount of waste liquidgenerated by an extraction method are solved, and effective component utilization rate of the catalyst mother liquor is increased.