41results about How to "Easy for industrial scale-up" patented technology

The invention discloses a preparation method for oil-phase silver nanoparticles. Micromolecule alcohol, water, a non-polar solvent and a surface active agent are mixed to obtain a uniform solution; inorganic silver salt is dissolved into water or an organic solvent to obtain a silver salt solution; a reducing agent is dissolved into water or an organic solvent to obtain a reducing agent solution; the obtained uniform solution, the obtained silver salt solution and the obtained reducing agent solution are added into an over-gravity rotary bed reactor for reacting, and a nano-silver microemulsion is obtained; and the non-polar solvent is added into the nano-silver microemulsion, and the oil-phase silver nanoparticles are obtained. The silver nanoparticles are small in grain size, narrow in granularity distribution, good in oil phase dispersibility and free of sedimentation after standing is carried out for more than three months.

The invention relates to a catalyst for preparing 1,3-butadiene through ethanol condensation. The catalyst is acid-base bifunctional mesoporous CuZnZrMgAl mixed metal oxide, wherein the atomic percent ratio of metal elements, i.e., Cu/Zn/Zr/Mg/Al in the catalyst is (9.68 to 36.43): (0 to 7.34): (0 to 7.62): (18.22 to 62.56): (20.93 to 48.12). The catalyst has the advantages of low reaction temperature, multielement active ingredient synergetic effect and good catalyst performance.

The invention discloses an external-heated and solid heat carrier combined rotary dry-distillation method and device. The method comprises the steps of mixing a heat carrier and dried/preheated raw coal, and enabling a mixture of the heat carrier and the dried/preheated raw coal to be subjected to dry distillation in a dry distillation furnace, so as to generate hot semicoke and coal gas, wherein one part of the hot semicoke is a semicoke product, one part of the hot semicoke is hot coke granules, and the hot coke granules serve as the heat carrier and are applied to coal gas dedusting after the hot coke granules are heated; smoke generated during semicoke heating is used for drying and preheating raw coal. The device comprises a raw coal preheating and drying oven, a semicoke heating furnace and the dry distillation furnace, wherein the raw coal preheating and drying oven and the semicoke heating furnace are located above the dry distillation furnace, and a material outlet of the raw coal preheating and drying oven and a material outlet of the semicoke heating furnace are communicated with a material inlet of the dry distillation furnace; the dry distillation furnace and the semicoke heating furnace are communicated by a hot coke granule circulating and conveying system; the dry distillation furnace preferably is an external-heated dry distillation furnace. The method and the device, disclosed by the invention, have the advantages that the thermal efficiency is high, the calorific value of the coal gas is high, the dust content is low, and the yield is large; the device is compact in structure and small in floor area.

The invention relates to a resistance switch material in Ag/Ag2S core/shell nanometer structure and a preparation method thereof. The Ag/Ag2S core/shell nanometer structure takes Ag as a core and Ag2S as a shell; the shape is sphere or similar to sphere; the average diameter is 0.01-5.0 microns; and the thickness of the Ag2S shell is 2-100 nanometers. The preparation method comprises the steps of: adding silver nitrate in a glycol/PVP (Polyvinyl Pyrrolidone) system to react; adding sulfur powder to react continuously; and washing the reacted precipitate by ethanol and then drying to obtain Ag/Ag2S core/shell nanocrystalline. The Ag/Ag2S core/shell nanocrystalline provided by the invention can be used as a resistance switch material to construct an Ag2S resistance switch, and has the advantages of simple and convenient preparation, economy, and suitability for industrial amplification and practical application.

The invention discloses a cycling elution biomimetic peristaltic enzymolysis reactor and a method thereof, comprising a biomimetic peristaltic enzymolysis reactor, a peristaltic driving device (10), an elution device (19), a membrane filtration subassembly (12), enzymolysis solution cycling pump (15), a sugar concentration analyzer (20), spiral material feeding/discharging devices (8,9) and a control system. The peristaltic device comprises a peristaltic rod and a peristaltic driving device, and conducts reciprocating motion at the parallel direction of the axial direction of the reactor; the sugar concentration analyzer controls cycling elution of cellulase in the enzymolysis reactor and separation and concentration of the cellulase and the sugar solution in the membrane separation system. The characteristics of the reactor are as follows: through the biomimetic peristaltic role, mass transportation between the solid-phase substrates is improved, and the accessibility of solid-phase substrate is increased; the cycling elution enzymolysis can solve the problem of low loading coefficient, low loading coefficient for traditional reactor, the invention provides high-concentration sugar platform; due to the enzymolysis process without solid flipping mechanical transmission, the reactor with simple structure has low energy consumption, facilitates the industrial scale-up.

The invention discloses a bionic intestinal flow self-peristalsis reactor system and a method. The bionic intestinal flow self-peristalsis reactor system comprises a peristalsis driving device, a bionic intestinal flow self-peristalsis reactor, a pressure regulating device, a feeding and discharging device, a control system and a circulating pipeline, the bionic intestinal flow self-peristalsis reactor system is characterized in that the bionic intestinal flow self-peristalsis reactor comprises a plurality of peristalsis sections, all the peristalsis sections are connected in series to form abionic intestinal tract, the front end of the bionic intestinal tract is connected with the peristalsis driving device, the pulsating flow characteristic of a fluid in the bionic intestinal tract is provided by the peristalsis driving device, the peristalsis driving device provides pulsating pressure for the fluid in pipes so as to realize periodic pulsating flow of the fluid, the tail end of thebionic intestinal tract is connected with the feeding and discharging device through the pressure regulating device, the feeding and discharging device is connected with the peristalsis driving devicethrough the circulating pipeline, the peristalsis driving device is controlled by the control system. The bionic intestinal flow self-peristalsis reactor system and the method can be widely applied to the fields of heat transfer, chemical industry, food and the like.

The invention discloses a preparation method of a denitrification catalyst whose low-temperature activity is enhanced by morphology effect, belongs to the technical field of air pollution control, and comprises the following steps: 1) weighing CeO ₂ The carrier was dissolved in deionized water, and the manganese nitrate solution was measured according to the molar ratio of Mn and Ce in the range of 1.5:5 to 2:5, and the weighed CeO ₂ The carrier is poured into the manganese nitrate solution to obtain the reaction solution; 2) the reaction solution is evaporated to dryness in an oil bath, and then the obtained substance is put into an oven to dry at 105-115° C. to obtain the dried product; 3) the dried The dry matter is calcined in a muffle furnace at 395-405°C for 3-4 hours to obtain CeO ₂ The invention is a denitrification catalyst for enhancing the low-temperature activity by the morphology effect of the carrier; the invention also discloses the catalyst prepared by the method and its application. The denitration catalyst of the present invention has high low-temperature activity and selectivity, and a wide activity temperature window; the preparation method of the present invention is simple and controllable, and the operation process is convenient, and can be applied to flue gas purification devices such as coal-fired power plants, cement plants, and glass furnaces. Tail end, energy saving and environmental protection.

The invention discloses a method for preparing nanometer perovskite type rare earth oxide in the technical field of catalyst, which comprises that: firstly, a rare earth raw material and a transition metal raw material are matched and then are mixed with strong base to be prepared into an even pasty mixture; and then the pasty mixture is orderly subjected to grinding, calcination, as well as washing and drying treatment to obtain nanometer rare earth composite oxide. The method adopts a mechanicochemical method to prepare a precursor substance, simplifies preparation working procedures, does not use an organic solvent in the whole reaction system, cannot cause the pollution to the environment, reduces the cost, and is easy for industrialized scale-up preparation.

The invention discloses a preparation method of a lysine acetate bulk drug, and belongs to the technical field of amino acid preparation. According to the preparation method, a conventional method ofusing an ion exchange column to remove chlorine is not used any more, thus acid, alkali, or ammonia water is not used, and the environmental pollution is reduced. An organic solvent/inorganic salt dual water phase system is established to separate and extract lysine acetate, and compared with a conventional ion exchange extraction method, the wastewater amount and consumed acid and alkali are further reduced. The recovery rate of provided preparation method can reach 99.8%, the product purity can reach 99.7%, and the light transmittance can reach 99.8%.

The invention provides separation technology for a gene recombinant heat-resistant manganese superoxide dismutase and belongs to the technical field of bioseparation engineering. By mainly applying the ultrafiltration separation technology, high-purity heat-resistant manganese superoxide dismutase can be separated from recombinant Escherichia coli (E. coli) by three simple steps of crushing, centrifuging and ultrafiltration; and in the separation preparation process, chromatography and electrophoresis centrifugal technology are not used, the extraction period is greatly shortened, and the rapid large-scale preparation of the recombinant heat-resistant manganese superoxide dismutase is realized.

The invention discloses a method for treating fluorine-containing olefin production waste, which is particularly suitable for a dechlorination system taking metal zinc as a dechlorinating agent and anon-alcohol polar organic solvent as a solvent. The method comprises the following steps: dissolving zinc chloride, carrying out solid-liquid separation, carrying out a double decomposition reaction,filtering, washing, drying, carrying out evaporative crystallization and rectifying. The method is used for comprehensively treating the fluorine-containing olefin production waste, and all componentsin the waste are treated.

The invention provides an Ni-Zn-Co metal composite catalyst. The mass ratio of Ni to Zn to Co is (0.228-0.685) to (0.744-1.241) to (0.083-0.248). The invention further provides a preparation method of the Ni-Zn-Co metal composite catalyst. A novel catalyst synthesis method is adopted, and under the condition that synthesis atmosphere and reaction atmosphere are consistent, through optimization combination, solution reaction and calcination in air, the Ni-Zn-Co metal composite catalyst with good dispersibility and a uniform shape is finally prepared after hydrogen reduction in a fixed-bed reactor; the catalyst is used in acetylene selective hydrogenation to obtain a combined composition with a high acetylene conversion rate and high ethylene selectivity, the reaction conditions are mild, and operational and industrial amplification is facilitated.