Application Examples of Rhodium Phosphate_Industrial Additives

Background and overview^[1-3]

Rhodium phosphate is a rhodium salt, a red-black solid. There are reports in the literature that it can be used as an active metal compound to prepare complexes of hierarchical porous structure HT materials and rhodium.

Washed kaolin clay

Apply^[1-2]

Application 1,

Hierarchical porous structure HT materials have the characteristics of high specific surface area, stable structure, thin lamellae, etc., and are currently a hot spot in HT research. A method for preparing a flower-shaped hierarchical pore structure hydrotalcite-like material catalyst, including the following steps:

Step 1, use a polar solution to prepare a mixed solution of the first metal salt, the second metal salt, the precipitant and the surfactant, place the mixed solution in an airtight kettle for hydrothermal reaction, and obtain a precipitate After washing and drying, the flower-shaped hydrotalcite-like material is obtained;

Step 2, load active metal, use the impregnation method to load active metal on the hydrotalcite-like material with a flower-shaped structure obtained after completing the step 1, first roast the hydrotalcite-like material with a flower-shaped structure to obtain a flower-shaped structure The roasted product of hydrotalcite-like material; use a polar solution to prepare the solution of the active metal, and then immerse the roasted product of the flower-shaped hydrotalcite-like material in the solution of the active metal for 2 to 10 hours, and then impregnate the solution with the active metal. The roasted product of the flower-shaped hydrotalcite-like material of the active metal solution is dried to obtain the flower-shaped hierarchical pore structure hydrotalcite-like material; and then roasted to obtain the flower-shaped hierarchical pore structure hydrotalcite-like material catalyst; the active metal The pH value of the solution is 1 to 4 or 8 to 10.

The active metal compounds are zinc nitrate, copper nitrate, cerium nitrate, indium nitrate, indium trichloride, tin tetrachloride, stannous chloride, gallium nitrate, chloroplatinic acid, diamine dichloride platinum , tetraammine platinum nitrate, chloroauric acid, silver hydroxide, palladium dichloride, tetraammine palladium dichloride, gold chloride, ruthenium trichloride, potassium chlororuthenate, rhodium nitrate, rhodium phosphate, rhodium chloride , one or more of rhodium sulfate.

Application 2,

CN201610280821.4 reports a complexing agent for trivalent rhodium ions in an alkaline solution, and the complexing agent is an aminocarboxylate and/or a hydroxycarboxylate. A direct liquid phase preparation method for preparing the corresponding rhodium complex using the complexing agent, including the following steps:

(1) Dissolve the rhodium salt in the acidic medium and the complexing agent in the alkaline medium, then mix the two to obtain a mixed solution of rhodium ions and complexing agent, and control the relationship between the complexing agent and rhodium ions. The molar ratio is 1:1~10:1;

(2) Under the conditions of stirring and heating, adjust the pH of the mixed solution prepared in (1) to 5~14, and control the heating temperature to 40~90°C.

In the present invention, the rhodium ion can be provided by rhodium sulfate, rhodium phosphate, rhodium chloride, rhodium iodide, rhodium nitrate, chlororhodate, etc., preferably rhodium sulfate, rhodium chloride, chlororhodate, etc. one or more types.