33results about How to "Realize scale-up production" patented technology

The invention discloses an activation and regeneration method of a deactivated catalyst in a process of synthesizing dimethyl oxalate by CO. The activation and regeneration method mainly comprises the following steps: washing the deactivated catalyst with alkali at high temperature and under high pressure and removing organic matters attached on the surface of the catalyst; immersing with a pore-expanding agent solution and roasting at 400 DEG C to 700 DEG C to remove deposited carbon attached on the surface of the catalyst and dredge a blocked pore channel of the catalyst; purging with mixed gas of nitrogen gas and hydrogen chloride to disperse an active Pd material which grow large by agglomeration again; immersing with alkali liquid and fixing the Pd material, which is dispersed again, on a carrier; finally, reducing with the catalyst through two steps including a wet process and a dry process, so as to reduce palladium oxide into palladium. The deactivated catalyst is subjected to activation treatment by the method and the agglomerated and sintered active Pd material is effectively dispersed; the activity of the catalyst can be recovered to be about 96 percent of original activity. The method provided by the invention is simple in process, easy to operate and low in cost, and circulating utilization of a noble metal catalyst is realized.

The invention discloses a device and method for preparing amorphous carbon and nitrogen thin films on the surface of silicon. The device is a pulse cathode electric arc device assisted by an ion source. The preparation device includes the following steps that a silicon substrate which is chemically cleaned in advance is dried and placed on a rotating sample table; vacuumization is performed, argon gas is led into a vacuum chamber, and the surface of the silicon substrate is physically cleaned through an ion sputtering source; and high-purity graphite serves as a cathode target material of a pulse electric arc, the pulse discharging frequency is adjusted, nitrogen gas is led at the same time, the ion source is opened, and the atomization and ionization nitrogen-doped amorphous carbon and nitrogen thin films are prepared. By means of the device and method, the content of carbon/nitrogen atoms and carbon-nitrogen bonds/carbon-carbon bonds in the amorphous carbon and nitrogen thin films is adjustable, and the carbon and nitrogen bonding types and the graphite-like nitrogen/ pyridine-like nitrogen structures are controllable.

The invention discloses a graphene coated lead composite material and a preparation method thereof as well as a lead-acid battery. The graphene coated lead composite material comprises lead particles and a graphene layer covering the lead particles; the graphene layer is further doped with carbonate and stannous sulfate, and the mass ratio of carbonate to stannous sulfate to graphene in the graphene layer is (1-4):(0.01-0.06):1. The preparation method of the graphene coated lead composite material comprises the steps of preparing a precursor mixture of the graphene coated lead composite material and performing solvothermal reaction treatment on the mixture. The anode and the cathode of the lead-acid battery contain the graphene coated lead composite material. The graphene coated lead composite material is high in structural stability, electrical conductivity and capacitive performance; the preparation method of the graphene coated lead composite material is capable of guaranteeing even size distribution, and also is high in operability and environmentally friendly, and consequently, enlarged production can be realized. The lead-acid battery is excellent in specific capacity, charge-discharge performance and charge-discharge cycle performance, and long in service life.

The invention relates to a thermoelectricity material and a preparation method thereof, belonging to the field of inorganic materials. The thermoelectricity material is synthesized by an inorganic high-temperature solid-phase one-step synthesis method. A CsxRE2Cu6-xTe6 compound synthesized by the method belongs to a hexagonal crystal series, a space group is P63/m. According to the primary thermoelectricity performance test of CsxRE2Cu6-xTe6 (RE=La, Ce, Pr), the compound of the series has relative high conductivity, a medium Seebeck coefficient and relative low thermal conductivity, and the ZT value is 0.26 (La, 614K), 0.17 (Ce, 660K) and 0.23 (La, 660K). The compound of the series probably has potential application value of thermoelectricity.

The invention discloses amphipathic alginate with response to light and a pH and stable pickering emulsion thereof. The emulsion is prepared from an oil phase and a water phase, stabilizers of the emulsion are nano-silica, the host molecules alginate (Alg-beta-CD) and guest molecules Azo-PEG, a volume ratio of the oil phase to the water phase is 1 to (0.1 to 10), the concentration of the silica dispersed in the water phase is 2wt%, the concentration of the (Alg-beta-CD) dispersed in the water phase is 1 g/L, and the concentration of the Azo-PEG dispersed in the water phase is 2 g/L. The pickering emulsion is high in stability, and has pH responsiveness and light responsiveness, by adjusting the pH or illumination, controllable release of an internal phase medicine can be achieved, and meanwhile, a preparation method is simple in operation process, and has large preparation throughput so that scale-up production of the emulsion can be achieved more easily, and the emulsion has wide application in the fields of make-up, biology, pesticide drug delivery and the like, and very good application and popularization values.

The invention discloses a preparation method of core-shell quantum dots. According to the invention, a first zinc carboxylate precursor with a carbon chain length of 2-6 and a second zinc carboxylateprecursor with a carbon chain length of 10-22 are adopted as composite cation precursors in an InP nuclear quantum dot coating process to obtain core-shell quantum dots with less defect inside and controllable wavelength; and a quantum dot film and a light emitting diode which are prepared from the core-shell quantum dots are relatively high in stability in a room-temperature environment and a high-temperature and high-humidity acceleration test, and can be used for manufacturing a light emitting element with long service life.

The invention provides a continuous synthesis method of ethoxymethylene malononitrile. The method comprises the following steps: continuously introducing malononitrile, triethyl orthoformate and acetic anhydride into continuous reaction equipment for substitution reaction to obtain ethoxymethylene malononitrile, and continuously discharging the generated ethoxymethylene malononitrile in the substitution reaction process, wherein the molar ratio of malononitrile to triethyl orthoformate to acetic anhydride is 1: (0.9-6.0): (2.0-6.0). The continuous reaction equipment is adopted, and the quantity of materials participating in the reaction in unit time is greatly reduced so that a high-temperature dangerous area is reduced and the safety risk is greatly reduced. The raw materials can be instantly heated to the reaction temperature through the continuous reactor, raw material decomposition caused by the long-time heating process is avoided, and the yield is remarkably increased. In addition, secondary toxic solvents such as methylbenzene are not needed in the reaction process.

The invention discloses a preparation method suitable for industrial scale-up production of a mannitol eutectic auxiliary material, and belongs to the technical field of medicines. The preparation method comprises the following steps of: mixing mannitol with calcium chloride, adding a proper amount of solvent, and stirring to obtain an eutectic crystal. The mannitol eutectic auxiliary material is prepared by using a suspension crystallization method, and the preparation method is high in yield, low in solvent consumption, low in energy consumption and pure in product, and has feasibility of scale-up production .