40results about How to "Improve hydrogenation reactivity" patented technology

The invention discloses a heteropolyacid-containing aromatics hydrogenation catalyst and a preparation method thereof, relating to a catalyst. The invention provides the heteropolyacid-containing aromatics hydrogenation with high sulphur resistance and high activity and the preparation method thereof. The catalyst comprises caesium heteropolyacid salts, hydrogenated components and a carrier, wherein the heteropolyacid caesium salts are caesium phosphotungstate or caesium silicotungstate, and the like; the hydrogenated components comprise Ni transition metal element, and the like; the carrier is a porous heat-resisting inorganic material; and the contents of all the components of the catalyst in percentage by mass are that: 5-40 percent of heteropolyacid, 0.2-0.5 percent of caesium, 5-20 percent of hydrogenated component and the balance of carrier. The preparation method comprises the following steps of: adding an water-soluble nickel salt solution and water-soluble heteropolyacid caesium salts into the carrier and impregnating; drying solid matters obtained through liquid-solid separation, and then roasting; preparing an aqueous caesium heteropolyacid salt solution, adding the aqueous caesium heteropolyacid salt solution to the obtained solid matters; impregnating and drying; and tabletting and forming to obtain the heteropolyacid-containing aromatics hydrogenation catalyst.

The invention relates to an active carbon loaded Ru-Co nanocatalyst and its application in a selective hydrogenation reaction of a benzaldehyde compound. The Ru-Co nanocatalyst is characterized in that a metallic ruthenium compound and a metallic cobalt compound undergo coprecipitation on an active carbon carrier and then reduction is carried out under a hydrogen atmosphere so as to obtain the Ru-Co nanocatalyst, wherein mass ratio of ruthenium to cobalt to active carbon in the prepared active carbon loaded Ru-Co nanocatalyst is 1: (10-100): (50-500). According to the selective benzaldehyde compound hydrogenation reaction catalyzed by the Ru-Co nanocatalyst, the benzaldehyde compound is converted to obtain corresponding benzyl alcohol. A preparation method of the catalyst is simple; raw materials are cheap and easily available; and the Ru-Co nanocatalyst is suitable for industrial production. In addition, the catalyst shows good activity and selectivity for the hydrogenation reaction of the benzaldehyde compound, and the catalyst is easy to recycle and reuse.

The invention discloses a loaded nickel-based catalyst. The loaded nickel-based catalyst comprises an active component and a composite carrier, wherein the active component comprises nickel, zinc, iron and cobalt; the active component is loaded on the composite carrier to form the loaded nickel-based catalyst of which the structure is shown as Ni-Zn-Fe-Co/ SiO2-TiO2; the loaded nickel-based catalyst comprises 30-80% by mass of nickel, 0.1-15% by mass of zinc, 0.1-5% by mass of iron, 0.1-15% by mass of cobalt, 10-50% by mass of silica, and 1-30% by mass of titanium dioxide. The prepared Ni-Zn-Fe-Co/ SiO2-TiO2 loaded nickel-based catalyst is obvious in petroleum resin hydrogenation decoloring effect; the preparation processes and equipment are simple; the industrial production can be easilycarried out; and the loaded nickel-based catalyst has a good application prospect and has huge economic benefit.

The invention relates to a supported copper-base catalyst for alkyne selective hydrogenation. The catalyst comprises a carrier and following components loaded on the carrier: (a) 5 to 15 wt% of copper, (b) 0.5 to 3 wt% of iridium, (c) 0.5 to 3 wt% of phosphor, and optional zirconium and/nickel. The carrier is preferably chosen from aluminum oxide, titanium oxide, silicon oxide, titanium oxide-aluminum oxide, titanium oxide-silicon oxide, or aluminum oxide-silicon oxide, and most preferably, the carrier is titanium oxide-aluminum oxide. The catalyst can be used to eliminate alkyne in C4 fraction through hydrogenation, has the advantages of high catalytic activity, high selectivity, good stability, and long service life, and is capable of preventing sulfur and arsenic poisoning.

A benzene hydrogenation catalyst and a preparing method thereof are disclosed. The catalyst includes, based on mass of oxides, 90.3-97 wt% of an alumina carrier having a macroporous structure and adopting chitosan as a pore-enlarging agent, 0.2-4.9 wt% of an active component that is platinum oxide and 0.2-4.8 wt% of an active component that is palladium oxide. The macroporous alumina carrier comprises auxiliary components which are tin, lanthanum and potassium. The catalyst has high benzene hydrogenation activity, the rate of loss of precious metal active components is low, and an operation cycle is long.

The invention provides a purification method for glycol. The purification method comprises the following steps: (1) physical adsorption: allowing a crude glycol product to pass through an active carbon bed for physical adsorption so as to obtain a first material flow; and (2) hydrofinishing: subjecting the first material flow, hydrogen and a compound hydrogenation catalyst to a contact reaction, wherein the composite hydrogenation catalyst comprises continuous-phase carbon and dispersion-phase Raney alloy particles, the dispersion-phase Raney alloy particles are uniformly or nonuniformly dispersed in the continuous-phase carbon, and the continuous-phase carbon is prepared by carbonizing carbonizable organic matters or mixtures thereof. The method provided by the invention can realize high-efficiency purification and substantially improves the UV transmittance of glycol.

The present invention discloses an unsaturated copolymer hydrogenation method, which comprises: (1) dissolving a unsaturated copolymer in an organic solvent, and carrying out inflation discharge deaeration; (2) adding a hydrogenation catalyst and a ligand, wherein the hydrogenation catalyst has the following general formula: M1aM2bXmLn; (3) introducing hydrogen, stirring, and carrying out a reaction, wherein the reaction conditions comprise that the reaction temperature is 0-30 DEG C, the hydrogen pressure is 0.05-15 Mpa, and the reaction time is 1-120 min; (4) heating to a temperature of 50-180 DEG C, maintaining the hydrogen pressure at 0.1-15 Mpa, and carrying out a reaction for 1-20 h; and (5) removing the organic solvent in the reaction product obtained in the step (4). With the method of the present invention, the catalyst application cost can be reduced, the reaction is easy to perform, the hydrogenation reaction activity is high, the hydrogenation degree of the hydrogenated product can be significantly improved, and the product does not have the significantly-increased gel content.

The invention relates to a preparation method and application of a palladium-based supported hydrogenation catalyst. The problems that in a traditional preparation method, dispersion of an active component palladium cannot be accurately controlled, agglomeration is likely to happen at high temperature, and consequently the hydrogenation performance of a catalyst is poor are mainly solved. The preparation method comprises the steps: respectively dispersing palladium salt, zinc salt, an imidazole compound and a carrier in a solvent, proportionally mixing, and sequentially carrying out thermal reaction, reduction and roasting treatment on the mixture to obtain the palladium-based supported catalyst. The method is simple in technological process, easy to control and amplify in process, novel and unique in catalyst structure and high in p-carboxybenzaldehyde conversion efficiency, and has potential industrial application prospect in crude terephthalic acid hydrofining reaction.

The invention relates to a high-fluorine-containing C9 resin hydrogenation catalyst, which is composed of an active component M1, an auxiliary agent component M2 and a carrier component M3. Based on 100% of the total weight of the catalyst, the content of the M1 component is 37%-54%, the content of the M2 component is 4%-6%, and the balance is the M3 component. The component M1 contains Ni, Mo, Cu and Al, the component M2 contains Sm and Na, and the component M3 is amorphous silicon-aluminum MgAl2O4 composite oxide. The invention also discloses a preparation method and application of the catalyst. The catalyst provided by the invention is used for hydrogenation removal of fluorine and sulfur in C9 resin, and can effectively delay fluorine and sulfur poisoning of a rear-stage hydrogenation catalyst.