119 results about "Chromium(III) chloride" patented technology

The present invention discloses anticorrosive trivalent chromium blue-white zinc coating passivator and its preparation process. The anticorrosive trivalent chromium blue-white zinc coating passivator includes Cr3+ 1-5 g / L, NaNO3 1-20 g / L, malonic acid 1-10 g / L, cobalt sulfate 5-20 g / L, acetic acid 1-10 g / L, phosphate 1-6 g / L, ammonium bifluoride 1-5 g / L and silicate 0.2-5 g / L. The preparation process includes dissolving the said materials in pure water successively through stirring to obtain transparent passivator. The present invention has the advantages of being practical and good use effect.

The invention relates to a pharmaceutical composition, and in particular relates to a composition containing various microelements, a preparation and a preparation method thereof. The composition comprises ferrous gluconate dihydrate, a zinc gluconate trihydrate compound, copper gluconate, manganese gluconate, sodium fluoride, cobalt gluconate dihydrate, sodium iodide, sodium iodide pentahydrate, ammonium heptamolybdate tetrahydrate, chromic chloride hexahydrate and a medicine auxiliary material. The form of the pharmaceutical composition can be injection or freeze-dried powder injection. According to the invention, organic iron, organic zinc, organic copper, organic manganese and organic cobalt are adopted to replace chloride, so that not only is the property of the composition more stable, but also the adverse reaction is reduced, and the bioavailability of the medicine is increased. Therefore, the preparation provided by the invention is better in safety and more suitable for clinical application.

Disclosed is an aqueous solution of a chromium salt which is characterized in that the oxalic acid content is not more than 8 weight% relative to chromium. In this aqueous solution of a chromium salt, the total organic carbon is not more than 4 weight% relative to chromium. The chromium salt may preferably be a chromium chloride, a chromium phosphate or a chromium nitrate. The chromium chloride may preferably contain a basic chromium chloride represented by the following composition formula: Cr(OH)xCly (wherein 0 < x <= 2, 1 <= y < 3, and x + y = 3). The chromium phosphate may preferably be one represented by the following composition formula: Cr(H3-3 / nPO4)n (wherein n is a number satisfying 2 <= n <= 3). The chromium nitrate may preferably be a basic chromium nitrate represented by the following composition formula: Cr(OH)x(NO3)y (wherein 0 < x <= 2, 1 <= y < 3, and x + y = 3).

An article comprising a turbine component formed of a nickel-chromium (Ni—Cr) alloy including from 2 to 50 wt % chromium balanced by nickel is disclosed. The Ni—Cr alloy is thicker than at least 125 μm to make a self-supporting turbine component, and the turbine component includes a rotor blade, a stator, or a vane. The Ni—Cr alloy is electroformed on a mandrel by providing an external supply of current to an anode and a cathode in a plating bath containing a solvent, a surfactant, and an ionic liquid including choline chloride, nickel chloride, and chromium chloride.

The invention discloses a chloride type trivalent chromium black chromium plating solution which comprises the following components by weight: 30 to 70g / L of chromium trichloride, 150-320g / L of conducting salt, 20 to 70g / L of complexing agent, 2 to 10g / L of blackening agent, and 0.2 to 1g / L of surfactant, wherein the conducting salt is one of or a mixture of potassium chloride, sodium chloride, ammonia chloride, sodium sulfate and potassium sulfate; the complexing agent is one of or a mixture of ammonium oxalate, malic acid and formic acid; and the blackening agent is one of or a mixture of ferric chloride, potassium thiocyanate, ammonium thiocyanate and cobalt nitrate. According to the chloride type trivalent chromium black chromium plating solution, a trivalent black chromium plating layer with thickness being 0.2 to 0.5microns can be obtained, an appearance of the plating layer is uniform and bright black, and the colors of a high electric current density region and a low electric current density region are essentially identical; and the chloride type trivalent chromium black chromium plating solution does not yellow or change color even if being placed in air in a plum rain season, and the mildews can not be found.

The invention relates to a chromium-containing light hydrocarbon combustion catalyst and a preparation method thereof, and belongs to the technical field of catalysts. The chromium-containing light hydrocarbon combustion catalyst is characterized in that a mass ratio of Al2O3 to Cr2O3 to CeO2 or Al2O3 to CrCl3 to CeO2 is A:B:C, wherein A:B is between 1 / 0.05 and 1 / 0.5, C is between 1 and 5 percent, Al2O3 is between 65 and 95 percent (W / W percent), Cr2O3 is between 5 and 50 percent (W / W percent), CrCl3 is between 5 and 50 percent (W / W percent), and CeO2 is between 0 and 5 percent (W / W percent). The preparation method comprises the following steps of: dissolving chromium nitrate or chromium chloride and aids of nitrates in water, dripping onto an aluminum oxide carrier, stirring, standing, drying, calcining at a certain temperature, cooling, grinding, tabletting, crushing and sieving to prepare the chromium-containing light hydrocarbon combustion catalyst. The chromium-containing light hydrocarbon combustion catalyst has the advantages of high low-carbon alkane catalytic combustion activity, high stability, simple preparation process, readily available raw materials, low cost and environment friendliness.

The invention discloses a preparation method of a Cr2O3 supported reduced graphene oxide lithium ion battery anode material. The preparation method comprises steps as follows: S101: preparing a graphene oxide solution and a chromium chloride hexahydrate solution; S102: adding the graphene oxide solution to the chromium chloride hexahydrate solution, and performing uniform ultrasonic mixing and drying to obtain a molten sample; S103: putting the sample in a porcelain boat, putting the porcelain boat in a tubular furnace, performing calcination and annealing under the inert gas, and naturally cooling a product to the room temperature to obtain a final product. The material takes chromium chloride hexahydrate as a precursor, the graphene oxide solution and the dissolved chromium chloride hexahydrate solution are mixed uniformly through ultrasonic treatment, the cathode material is prepared through calcination at the high temperature, the conductivity of the material is effectively increased through supporting of graphene, the volume expansion effect in the charge-discharge process is effectively relieved, and the lithium ion battery anode material with high specific capacity and longcyclic life is prepared. Raw materials are widely sourced, and the method is simple, controllable and easy to operate, uses simple equipment and causes little pollution.