364 results about "Ferric chloride hexahydrate" patented technology

The invention discloses a solder stripping agent, which is prepared from the following components: 500 to 650g / L of 70 percent nitric acid, 50 to 70g / L of hydrochloric acid, 4.3 to 8.6g / L of ferric nitrate or 2.9 to 5.8g / L of ferric trichloride or 4.8 to 9.7g / L of ferric chloride hexahydrate, 0.5 to 25g / L of organic acid complexing agent, 1 to 50g / L of water-soluble organic amine, 1 to 10g / L of organic corrosion inhibitor for copper, 1 to 2g / L of stabilizing agent, 1 to 5g / L of surfactant, and 0.1 to 1g / L of small molecular alcohol. The solder stripping agent can quickly strip solder or solder alloy layers thoroughly, basically cannot generate or generates little salt mist containing nitric oxides in the stripping process, and has the advantages of small silt amount, long service life of stripping solution, no strong corrosion on copper at a bottom layer, bright substrate and the like.

The invention provides a nickel-iron double hydroxide / foamed nickel catalyst based on a ferric chloride / urea eutectic solvent, and a preparation method and an application thereof. The nickel-iron double hydroxide / foamed nickel catalyst is prepared from the eutectic solvent which is prepared from ferric chloride hexahydrate and urea. The preparation method has the advantages of cheap and easily available raw materials, low cost, extremely simple operating process, easily realized reaction conditions, no high temperature, low energy consumption, short preparation period, and suitableness for industrial production. The obtained catalyst is nickel-iron double hydroxide loaded on foamed nickel, and the catalytic active component is nickel-iron double hydroxide (NiFe-LDH), and has a hierarchicalstructure that is a nanoflower structure composed of nanosheets. The catalyst has a good electrocatalytic electrolysis effect on water and urea.

The invention relates to a method for preparing a ferroferric oxide / graphene magnetic nano composite material by a solvothermal one-step method. The method comprises the following steps: by using ferric chloride hexahydrate and graphite oxide as raw materials, sodium bicarbonate as an alkali source, ethylene glycol and water as the solvent and polyvinylpyrrolidone as a surface active agent, dissolving graphite oxide, ferric chloride hexahydrate and polyvinylpyrrolidone into a mixed solvent of ethylene glycol and water, and carrying out ultrasonic treatment to obtain mixed solution A; dissolving sodium bicarbonate into ethylene glycol and carrying out ultrasonic treatment to prepare mixed solution B; after mixing the mixed solution A and B, reacting at 150-200 DEG C and at the pressure of less than 2.5 MPa for 4-12h, and then carrying out aftertreatment to obtain the ferroferric oxide / graphene magnetic nano composite material, wherein the ferroferric oxide particles are uniform, the distribution is narrow and the grain size is 10-30nm. The method is simple and convenient in process, environment-friendly and suitable for batch production.

The invention belongs to the technical field of photocatalysts and specifically relates to a preparation method of a visible-light-driven photocatalyst Fe3O4@PDA@Ag composite microsphere. The preparation method comprises step 1 of respectively dissolving ferric chloride hexahydrate and sodium acetate into equivalent ethylene glycol, then evenly mixing and stirring two solutions, adding a 10 to 30wt% polyacrylic acid solution to continue stirring for 6 to 12h, putting into a reaction kettle, heating to 180 to 210 DEG C and keeping reaction for 4 to 12h to obtain a black product of ferroferric oxide; step 2 of dispersing the ferroferric oxide into an ethanol solution of polyvinyl pyrrolidone, then adding a water solution of dopamine hydrochloride, performing water bath and fully and ultrasonically dispersing to obtain a mixed solution b; step 3 of dropwise adding ammonium hydroxide into the mixed solution b, continuing ultrasonic reaction for 2 to 5 hours to obtain Fe3O4@PDA composite microspheres; step 4 of adding the prepared Fe3O4@PDA composite microspheres into ammonium hydroxide and silver nitrate to be prepared into a tollens' reagent, putting in a table concentrator to be vibrated for 8 to 16hours, performing magnetic separation and performing aftertreatment to obtain the Fe3O4@PDA@Ag composite microspheres. The Fe3O4@PDA@Ag composite microspheres have an obvious effect on degrading methyl orange and can be used repeatedly.

The invention discloses a polypyrrole coated hard carbon cathode material and a preparation method thereof. The polypyrrole coated hard carbon cathode material adopts a hard carbon sphere as the substrate, which is coated with a polypyrrole layer. The preparation process comprises: taking glucose as the carbon source, preparing a hard carbon sphere material by a hydrothermal calcination method, taking ferric chloride hexahydrate as the oxidant, and preparing the polypyrrole coated hard carbon cathode material by an in-situ chemical oxidation method. The process involved in the invention is simple, has good repeatability, and has no need of adding additives. The prepared composite material has good electrical conductivity, thus being in favor of bringing the electrochemical performance of the lithium ion battery cathode material into play.