33 results about "Pd element" patented technology

The invention relates to a mixed low carbon alkane dehydrogenation catalyst and a preparation method thereof. A problem of low activity of dehydrogenation catalysts prepared through present technologies is mainly solved. The mixed low carbon alkane dehydrogenation catalyst comprises 0.1-10% of Pt and Pd elements or oxides thereof, 0.25-10wt% of Sn, Fe, Ni elements or oxides thereof, 0.1-10wt% of Na, Li and K elements or oxides thereof, 0-10wt% of Nb, Mo, Ta and W elements or oxides thereof, and 70-99wt% of ZSM-5 with different Si/Al ratios. The mixed low carbon alkane dehydrogenation catalyst well solves the problem, and can be used in the industrial production for preparing low carbon olefins through the mixed low carbon alkane dehydrogenation.

The invention discloses a nano-spherical mesoporous organic metal catalyst. In the nano-spherical mesoporous organic metal catalyst, the grain diameter is between 100 and 600nm, the pore diameter is between 1.5 and 8.0nm, the pore volume is between 0.2 and 1.0cm<3>/g, the specific surface area is between 800 and 1,200m<2>/g, and the Pd element content is between 0.05 and 0.35mmol/g. The preparation method comprises the following steps: mixing organic metal silane, solution of inorganic silane, a template, water and ethanol; performing a hydrolytic polycondensation reaction by using a spray drying method; and extracting the template from an obtained solid by using alcohols to prepare the nano-spherical mesoporous organic metal catalyst. By using the method, an organic metallic catalyst with ordered mesopore arrangement can be quickly prepared, the active ingredients of the organic metallic catalyst are highly dispersed in pore passages, and the organic metallic catalyst serves as a catalyst for Barbier reaction or Sonogashira reaction in a water medium, and the organic metallic catalyst can have the catalytic performance similar to that of a homogenous organic metal catalyst.

The invention relates to a method for synthetizing N,N-diisopropylethylamine; the method comprises the steps as follows: taking diisopropylamine, epoxy ethane as the raw material, taking zinc chloride, tetramethyl ammonium hydroxide as the catalyst, taking the water as the circulating medium, reacting and aging; the reaction is carried out under gas and liquid phases utilizing single kettle production; the specific operating conditions being normal pressure, the temperature being 50 to 180 degrees centigrade, the air speed of ethylene oxide gas being 50 to 100 kg/h, the mol ratio between diisopropylamine and epoxy ethane being 1-1.5, the dosage of the catalyst being 0.5-1 weight of diisopropylamine; thermal reacting for two hours, then discharging and filtering to remove the solid catalyst, evaporating diisopropylamine and moisture under normal pressure, adding with activated carbon dipping with Ru, Pt or Pd elements, decompressing, rectifying, collecting the products. The invention has the advantages of taking the water solution of the diisopropylamine as the main reaction line, adding with little catalyst into the water solution of the diisopropylamine, and reacting through the epoxy ethane under normal pressure, having excellent reaction effect.

A fluorescence sensor 10 includes a silicon substrate 11 on which a PD element 12 that converts fluorescence into an electric signal is formed, an LED substrate 15 having a first principal plane 15A on which an LED element 15C that generates excitation light is formed, a reflective film 20 that averages a light amount distribution of the excitation light radiated from a second principal plane 15B of the LED substrate 15, and an indicator layer 17 that receives the excitation light averaged by the reflective film 20 and generates the fluorescence having a light amount corresponding to an analyte amount.

The invention relates to a hydrogen substrate biological Pd reactor performing aeration with a no-pore hollow fiber membrane. The hydrogen substrate biological Pd reactor comprises a main reactor anda side reactor, wherein the main reactor comprises a main reactor pipe body, a first no-pore hollow fiber membrane assembly which is arranged in the main reactor pipe body along the main reactor pipebody and to which biological Pd is adhered, and first hydrogen gas inlets which are formed in the upper end and the lower end of the first no-pore hollow fiber membrane assembly; the side reactor comprises a side reactor pipe body, a second no-pore hollow fiber membrane assembly which is arranged in the side reactor pipe body along the side reactor pipe body and to which the biological Pd is adhered, and a second hydrogen gas inlet which is formed in the upper end of the second no-pore hollow fiber membrane assembly; and the main reactor and the side reactor form circular connection and are communicated with an external hydrogen gas source and a water supply system. Compared with the prior art, the hydrogen substrate biological Pd reactor disclosed by the invention is reasonable in structure, can be used for recovering and fixing Pd elements in water, and can control the hydrogen gas supply quantity; and the treatment effect is good, the utilization rate of the hydrogen gas is increased, and the situations that the diffusion of the gas is not uniform and the utilization rate of the gas is low caused by on-way resistance are avoided.

The invention discloses a Pd-loaded Ti/CeO2 nano compound type catalyst. A Ti-doped CeO2 nanosheet is taken as a carrier, and a transition metal Pd element is loaded on the carrier, wherein the load of the Pd element is less than or equal to 0.19 wt%. The invention further discloses a preparation method of the Pd-loaded Ti/CeO2 nano compound type catalyst, the method comprises the following steps:taking ethyl alcohol as a solvent, organic acid and inorganic salt as raw materials and water as a precipitant to prepare a rare earth oxide, then taking ethanediol and the like as reducing agents, enabling Pd nano particles to be loaded on a Ti-doped CeO2 nanosheet carrier, the prepared nano material has uniform morphology, various doped elements are uniformly distributed, and the Pd-loaded Ti/CeO2 nano compound type catalyst has a good catalytic reduction effect on p-nitrophenol, high reusability and a potential application value in the sewage treatment aspect.

A fluorescent sensor (30) is provided with: a detection substrate section (11), wherein a PD element (12), which converts fluorescence into electric signals, is formed on a wall surface (22) of a through hole (21) that penetrates a first main surface (11SA) and a second main surface (11SB); an indicator (17), which is disposed inside of the through hole (21), and which generates fluorescence with intensity corresponding to the concentration of an analyte when the excitation light is received; a filter layer (14), which covers the PD element (12), passes through the fluorescence, and blocks the excitation light; a light blocking layer (18), which covers an opening of the through hole (21), said opening being in the first main surface (11SA), and which the analyte can pass through; and an LED chip (15), which covers a region just below the opening of the through hole (21), said opening being in the second main surface (11SB), and which generates the excitation light.

The invention relates to alkyl-modified pyridylarylsilane compounds and a preparation method thereof. The preparation method comprises the following step: in an organic solvent, carrying out reaction on organosilane and alkyl boric acid compounds used as raw materials by using a Pd element as a catalyst under the action of a ligand in the presence of an oxidizer and an additive for 2-48 hours while controlling the reaction temperature at 30-80 DEG C, thereby obtaining the alkyl-modified pyridylarylsilane compounds. Compared with the prior art, the synthesis method of the alkyl-functionalized pyridylarylsilane compounds is completed for the first time. The method has the advantages of mild conditions, high yield, wide substrate application range and the like, and is simple to operate.

The invention provides a preparation method of a Pd/Ti double-layer getter film and the Pd/Ti double-layer getter film. The method comprises the steps that evaporation coating is conducted when the lowest background pressure intensity is obtained, a Ti metal wire is sublimated at a first deposition temperature ranging from 200 DEG C to 300 DEG C for a first deposition time ranging from 60 min to 90 min by adopting a first deposition current of 45 A, thereby depositing a Ti element on the plated surface to form a bottom layer film; and a Pd metal wire is sublimated at a second deposition temperature ranging from 100 DEG C to 180 DEG C for a second deposition time of 20 minutes by adopting a second deposition current of 45A while the Ti element is deposited on the plated surface, thereby depositing the Pd element on the bottom layer film and forming a surface layer film on the surface of the bottom layer film. According to the preparation method of the Pd/Ti double-layer getter film andthe Pd/Ti double-layer getter film, ultrahigh vacuum can be prevented from being damaged when the Pd/Ti double-layer getter film is prepared, so that the maintenance of the ultrahigh vacuum and the low activation temperature of the Pd/Ti double-layer getter film are both considered, the pumping speed of preparation equipment is increased in an auxiliary manner, and the preparation effect of the Pd/Ti double-layer getter film is improved.

A method for correcting a fluorescent sensor in the embodiment of the present invention is provided with: a first detection signal acquiring step wherein a first detection signal is acquired at a first temperature using a fluorescent sensor (10), which is provided with an LED element (12), an indicator layer (16), and a PD element (13) that outputs a detection signal having an excitation light detection signal superimposed on a fluorescent detection signal, and which has a temperature detecting function and a temperature adjusting function; a second detection signal acquiring step wherein a second detection signal is acquired at a second temperature when an analyte quantity is equivalent to that in the first detection signal acquiring step; a correction coefficient calculating step wherein a correction coefficient for correcting the fluorescent detection signal is calculated on the basis of the first detection signal and the second detection signal; and a correcting step wherein subsequent detection signals are corrected using the correction coefficient and a temperature detection signal.

The invention provides a palladium compound PdSxCl2-2x (wherein x is more than 0 and less than 1) being stable in an acetylene atmosphere at a high temperature and having a catalysis activity on acetylene hydrochlorination for synthesizing vinyl chloride. The palladium compound comprises a porous solid carrier and a PdSxCl2-2x compound supported on the surface of the porous solid carrier, the PdSxCl2-2x compound is a PdSxCl2-2x ionic compound formed through using Pd as the core and bonding S and Cl with Pd through ionic bonds, wherein x is more than 0 and less than 1, the loading quantity of the Pd element is 0.05-1% of the weight of the carrier, and the loading quantity of the S element is 0.1-5% of the weight of the carrier. The ionic bonds between Pd and S and between Pd and Cl in the PdSxCl2-2x compound formed through introducing the S element to the PdSxCl2-2x compound are stronger than ionic bonds of PdCl2 or [PdCl4]<2->, so sublimation induced loss of a complex formed by the PdSxCl2-2x compound used as an active site and C2H2 is difficult, thereby the stability of the supported palladium catalyst in an acetylene hydrochlorination reaction is improved.

The invention provides corrosion-resistant titanium alloy. The corrosion-resistant titanium alloy comprises, by weight, 0.04-0.25% of Pd, higher than 0% and lower than or equal to 50% of Zr and the balance Ti. The corrosion-resistant titanium alloy has the advantages that the contents of various elements are strictly controlled, effects of improving the crevice corrosion resistance of the corrosion-resistant titanium alloy mainly can be realized by the Pd elements in the corrosion-resistant titanium alloy, and anti-pollution effects of the hydrogen absorption ability of the surfaces of the corrosion-resistant titanium alloy can be improved; the Zr elements are added on the basis of the Pd elements, the Zr used as passive metal is negative in initiating passive potential as compared with the Ti and is high in passivation ability, accordingly, passive films can be easily generated on the surfaces of the corrosion-resistant titanium alloy, and the corrosion resistance of the corrosion-resistant titanium alloy in diversified corrosive media can be enhanced; as shown by experimental results, the enhancement amplitude of the corrosion resistance of the corrosion-resistant titanium alloyin sodium chloride solution can reach 11.28-66.29% as compared with comparison alloy (Ti-0.04Pd) obtained by the aid of identical treatment processes.