9 results about "Rhodium compounds" patented technology

The invention discloses a low-carbon alkane dehydrogenation catalyst as well as a preparation method and application thereof, and belongs to the technical field of low-carbon alkane dehydrogenation catalysis. ZMQ-1 molecular sieve dispersion liquid is prepared from a ZMQ-1 molecular sieve and an EDTA (Ethylene Diamine Tetraacetic Acid) solution; carrying out electron beam radiation treatment on the ZMQ-1 molecular sieve dispersion liquid; adding a lanthanum compound and a rhodium compound to obtain a mixed solution; and carrying out electron beam radiation treatment on the mixed solution, and carrying out ball dropping forming, drying and roasting to obtain the low-carbon alkane dehydrogenation catalyst. Through the mode, the light alkane dehydrogenation catalyst is obtained by performing electron beam radiation treatment on the ZMQ-1 molecular sieve dispersion liquid, adding lanthanum and rhodium elements according to a reasonable proportion, performing electron beam radiation treatment on the mixed liquid, and performing ball dropping forming, drying and roasting. On the other hand, the whole preparation process is less than 10 hours, the production cycle of the catalyst is shortened, and the energy consumption of the preparation process is reduced.

The present invention relates to rhodium compounds of the formula (I) [(L1)2Rh]+k[A]k- (I), where L1 is a bidentate phosphor-organic ligand, in particular a chiral bisphosphine ligands, preferably a ligand of the formula (II) as described herein, such as (2R,3R)-bis(diphenylphosphino)butane or (2S,3S)-bis(diphenylphosphino)butane, and A is a rhodium carbonyl anion optionally containing n mono- and bidentate ligands L2 and n is 0, 1 or 2, in particular 0, k is 1, 2 or 3; wherein [A]k- in formula (I) is preferably an anion of the formula [Rh(CO)4-n(L2)n]-, where L2 if present, is a monodentate organic ligand other than CO or, if n = 2, two ligands L2 may together form a bidentate organic ligand. The present invention further relates to the use of the rhodium compounds of the formula (I) as catalysts in a selective catalytic hydrogenation of an α,β-unsaturated olefinic double bond of an α,β-unsaturated carbonyl compound.

This invention discloses a nitrogen-doped graphene oxide / porous carbon supported metal catalyst, its preparation method, and its application. The catalyst preparation method includes: (a) mixing nitrogen-doped graphene oxide / porous carbon with a solvent to obtain mixture A; (b) mixing mixture A with a sodium alginate solution to obtain mixture B; and (c) mixing mixture B with a rhodium-containing compound, followed by washing and drying. The nitrogen-doped graphene oxide / porous carbon supported metal catalyst of this invention achieves a good balance between preparation cost, catalyst activity, and product selectivity. It also exhibits excellent recovery after the reaction, allowing the separated catalyst composition to be recycled, reducing production costs and facilitating industrial production applications.

The invention relates to the field of organic synthesis, and discloses a method for preparing aldehyde through hydroformylation of a Fischer-Tropsch product. The method comprises the following steps: under the action of a catalyst, carrying out hydroformylation reaction on a Fischer-Tropsch product and synthesis gas to prepare aldehyde; the catalyst is prepared based on a rhodium compound, a monophosphine ligand and a polyphosphine ligand. The catalyst is prepared by simultaneously adding the monophosphine ligand and the polyphosphine ligand, so that when aldehyde is prepared through hydroformylation reaction, the production cost of the aldehyde can be reduced while the normal / isomeric ratio of the product aldehyde is increased.

The application discloses a method for preparing platinum group metals from waste materials. The method comprises the following steps: high-temperature calcination of the waste materials with activated carbon and combustion-supporting agents to remove organic matters; high-temperature calcination of the waste materials with zinc powder to activate the waste materials; removal of part of impurities through subsequent oxidation leaching; preparation of a solution and a crystal corresponding to a platinum group metal compound through an oxidation-reduction process; reduction and dissolution of the platinum group metal compound with the aid of a reaction aid; purification of the platinum group metal compound through ammonium sulfide to obtain a pure iridium compound; purification of the pure iridium compound through adsorption resin to obtain a pure rhodium compound crystal; and finally, calcination and reduction to obtain a corresponding high-purity platinum group metal powder.

Provided is a calcined body that generates photons. The calcined body of the present invention is a calcined body of a composition comprising: (i) alumina; (ii) at least one selected from the group consisting of silica and titanium oxide; (iii) at least one selected from the group consisting of platinum, platinum compounds, palladium, palladium compounds, iridium, iridium compounds, rhodium, and rhodium compounds; and (iv) silicon nitride, in 100 parts by mass of the composition, 5-10 parts by mass of the (iv) silicon nitride is contained.

A method for producing an exhaust gas purification material, wherein the method comprises the steps in this order: (a) Impregnating a metal oxide support with a solution of a rhodium compound; (b) Drying the metal oxide support impregnated with a solution of a rhodium compound to obtain a rhodium-containing catalyst comprising the metal oxide support and rhodium particles supported on the metal oxide support; (c) Heating the rhodium-containing catalyst at a temperature within a range of 700 °C to 900 °C under an inert atmosphere; and (d) Mixing the rhodium-containing catalyst with a material that has a higher basicity than the basicity of the metal oxide support.

Provided are a method for producing an exhaust gas purification material capable of efficiently removing harmful components even after exposure to a high-temperature environment, and a method for producing an exhaust gas purification device. A method for producing an exhaust gas purification material, comprising, in order: (a) impregnating a metal oxide support with a rhodium compound solution; (b) drying the metal oxide support impregnated with the rhodium compound solution to obtain a rhodium-containing catalyst comprising the metal oxide support and rhodium particles supported on the metal oxide support; (c) heating the rhodium-containing catalyst to a temperature range of 700 to 900°C under an inert atmosphere; and (d) mixing the rhodium-containing catalyst with a material having a basicity higher than that of the metal oxide support.

The application relates to preparation and application of a photochemical coenzyme NADH photosensitizer, and belongs to the field of biological chemical industry.The method comprises the following steps: a rhodium compound [Cp*RhCl2]2 is combined with meso-tetra(4-carboxyphenyl)porphyrin TCPP into a single molecule porphyrin photosensitizer through an amide bond and a coordination bond; the functional groups include a carboxyl group and an amino group. The photosensitizer has simple synthesis steps, mild reaction conditions, and the coenzyme NADH regeneration efficiency can reach 33.4% under light irradiation for 10 min, and has wide application prospects in the aspect of biological catalytic conversion of CO2 to produce methanol.