358results about How to "Preparation process safety" patented technology

The invention discloses low-cost green cellulose aerogel and a preparation method for hybrid aerogel thereof. The preparation method for the hybrid aerogel of the cellulose aerogel comprises the following steps that cellulose is dissolved into a zinc chloride aqueous solution, centrifugal deaeration is performed, and a uniform and transparent cellulose solution is obtained; the cellulose solution is formed, then the formed cellulose solution is placed into a coagulating bath to be regenerated, in addition, the regenerated cellulose solution is fully washed by use of a solvent, and cellulose solvent gel is obtained; the solvent in the cellulose solvent gel is removed by use of supercritical carbon dioxide drying or freeze drying, and the cellulose aerogel is obtained. Functional filler can be added into the cellulose solution to obtain the hybrid aerogel. By the adoption of different solution forming methods, the cellulose aerogel and the hybrid aerogel thereof in the shapes of sheets, fibers, particles and the like can be prepared. The preparation method is low in cost and is environmentally friendly, and the prepared aerogel is provided with a uniform nano-grade net porous structure.

The invention discloses a thermoplastic polyurethane elastomer foam material, which is prepared from the following raw materials by weight: 80-100 parts of a thermoplastic polyurethane elastomer, 10-40 parts of a filler, 4-7 parts of a foaming agent, 0.6-1.5 parts of a cross-linking agent, 1.0-1.5 parts of a cross-linking assistant, 0.1-1.0 part of a mildew proof antibacterial agent and 1.2-2.0 parts of a lubricant. Adopting the above technical scheme, the invention has the beneficial effects of improving the foam expansion of the thermoplastic polyurethane foam material, expanding the scope of usage of the polyurethane foam material, and realizing compression deformation of a finished product produced from the thermoplastic polyurethane foam at no more than 35%, which is unmatched by an EVA foam material with equivalent foam expansion and similar elasticity. In addition, the foam material improves the performance of existing traditional foam materials, and solves the defects that polyester-type thermoplastic polyurethane elastomer has short service life, easily goes moldy on the product surface and generates mechanical performance loss in the field and damp and hot environment.

The invention relates to a preparation method of a mud-resistant polycarboxylate-type water reducer. The preparation method comprises the following specific steps: stirring an unsaturated small monomer containing an epoxy group, a secondary amine small organic molecule and a small organic molecule containing halogen at certain temperature under the action of a catalyst to obtain a product of quaternary ammonium salt unsaturated small monomer; carrying out water phase free radical polymerization reaction on the quaternary ammonium salt unsaturated small monomer, an unsaturated ester small monomer, an unsaturated sulfoacid small monomer, an unsaturated acid small monomer and an unsaturated polyether large monomer under the combined action of an initiator and a chain transfer agent to obtain a copolymerized product, regulating the pH value after reaction and adding water to obtain the polycarboxylate-type water reducer. The mud-resistant polycarboxylate-type water reducer prepared by the method has the advantages of being simple in reaction, easy to control and low in cost. Besides, adverse effect caused by mud-containing aggregate in the concrete can be avoided, and the problems of insufficient concrete slushing, large slump loss and low strength are solved without increasing the mixing amount of the water reducer.

The invention discloses a preparation method for the silica sol with a high evenness degree, belonging to the technical field of electronic manufacturing and SiO2 sol preparation. Under an ultrasonic influence, a silica sol seed solution is prepared and a reaction material is added to the silica sol solution in batches; aqueous solution and metallic silicon powder that serve as basic catalysts are chosen as the reaction material for each batch, and the basic catalyst in each batch is 2-40% of the basic catalyst previously added into the silica sol seed solution, and the metallic silicon powder in each batch is 2-40% of the metallic silicon powder previously added in the silica sol seed solution. After the reaction finishes, the unreacted metallic silicon powder is removed, and the SiO2 sol is produced. The ultrasonic sound adopted for the invention ranges from 20 to 50 kHz. By adopting the invention, production costs can be reduced and product purity is improved. In addition, the method disclosed by the invention has the advantages of safe technical process, simple equipment, and is easy to operate as well as is economic and has high efficiency.

The invention discloses a core-shell type cationic/anionic polyacrylamide profile control oil displacing microsphere and a preparation method thereof. The core-shell type cationic/anionic polyacrylamide profile control oil displacing microsphere with a micrometer particle size range is prepared in one pot by adopting a dispersion polymerization method, and the whole preparation process is continuously completed by two steps: firstly synthesizing a core part of a microsphere, and then synthesizing a shell part of the microsphere. The core part of the microsphere consists of water-soluble monomer acrylamide, an ionic monomer I and a crosslinking agent; the shell part of the microsphere consists of water-soluble monomer acrylamide, an ionic monomer II and a crosslinking agent; and the ionic monomer I and the ionic monomer II have opposite charges. The particle size of the core-shell type cationic/anionic polyacrylamide profile control oil displacing microsphere is 1-200mu m. The preparation method is simple in preparation process, the whole preparation process is environmentally friendly and low in cost; and a solvent can be recycled, and the recycling rate is above 80 percent. The core-shell type cationic/anionic polyacrylamide profile control oil displacing microsphere is used as a profile control oil displacing material, and has excellent injectivity and mobility.

The process of preparing high purity chlorogenic acid and flavonid with eucommia leaf includes the following steps: crushing eucommia leaf and extracting with pH 3-6 alcohol solution of 45 %-55 % concentration; saturation adsorbing the extracted solution with medium polarity JD-1 macroporous resin, and eluting successively with water, 20 %-45 % concentration alcohol solution and 60 %-75 % concentration alcohol solution to obtain crude chlorogenic acid product and flavonid-containing powder separately; eluting the crude chlorogenic acid product in silica gel column with ethyl acetate, acetone, methanol or ethanol, collecting the eluted solution, decompression concentrating, and re-crystallizing the concentrate in acetone or water to obtain refined chlorogenic acid product. The present invention has simple technological process, convenient operation, reuse of the macroporous resin, low comprehensive cost and excellent industrial application foreground.

The invention discloses a preparation method of a concrete thickener. The preparation method of the concrete thickener comprises subjecting small unsaturated amide monomers, small unsaturated hydroxyl-ester monomers and small unsaturated sulfoacid monomers to aqueous phase radical polymerization under the combined action of a redox system composed of initiating agent and reducing agent to obtain polymerized products; adjusting the PH of the polymerized products to be 6-7; adding water into the polymerized water to obtain the concrete thickener at a concentration of 3-10wt%. According to the preparation method of the concrete thickener, the product performance can be adjusted by controlling the molecular weight of the polymerized products, so that high reaction velocity can be obtained, organic solvent can be omitted, and being non-toxic and pollution-free and simple in operation can be achieved. The concrete thickener prepared through the method can avoid segregation under the premise of achieving high water retention, thereby guaranteeing the slump resisting performance of concrete and achieving stable product performance.

The invention belongs to biology technology field, which concretely refers to controlled release tissue factor path inhibitor (LTFPI) and the manufacturing method, and the application. The invention analyzes and experiments the biology information science and structure molecular biology science of tissue factor path inhibitor (TFPI) and its acceptor low density lipoprotein acceptor correspondent protein (LRP), it ascertains the part where the TFPI carboxy end combines with LRP and is eliminated. It designs TFPI carboxy end mutant, which is recombined with primary nucleus or eukarya expressing carrier after constructing LTFPI gene through PCR location, it converts bacillus coli or bici yeast, sifts the high expression project fungus. The primary project fungus are yeasted and expanded, crushed, then they are centrifugated and collects the inclusion body, purifies the LTFPI through molecular sift and ion interchanging two-step method; the eukarya project fungus are carried on with two-step purifying directly. The half-life are prolonged, it has good pour-depressant function.

The invention provides an NiAl alloy thin-walled pipe fitting forming and controlling performance integrated method and belongs to the technical field of precise forming of intermetallic compound thin-walled pipe fittings. The NiAl alloy thin-walled pipe fitting forming and controlling performance integrated method comprises the following steps that Ni foils and Al foils are alternately laminatedand coiled to obtain an Ni/Al foil an ag/l laminated foil tube; and the Ni/Al laminated foil tube is subjected to plastic forming, reaction synthesis and densification treatments in an air expansion forming die to obtain the NiAl alloy thin-walled pipe fitting. The NiAl alloy thin-walled pipe fitting forming and controlling performance integrated method solves the problems of difficulty in controlof material flowing and tissue performance and complex procedures of existing NiAl alloy slab preparation and the thin-walled pipe fitting formed with a slab. Data of the embodiment of the inventionshows that the NiAl alloy thin-walled pipe fitting obtained by the method is high in forming rate and size precision, uniform in component distributed, good in compactness and non-defective in surface.

The invention discloses a preparation method of a water retaining agent. The preparation method comprises the following steps: carrying out an aqueous phase radical polymerization reaction on unsaturated amide micro-monomers, unsaturated sulphonic acid micro-monomers and unsaturated polyether macromers or unsaturated ester macromonomers under the coaction of an oxidation-reduction system composed of an initiator and a reducing agent to obtain a copolymerization product, regulating the pH value to 6-7 after the reaction, and adding water to obtain the water retaining agent with mass concentration of 1-60%. The preparation method disclosed by the invention is used for adjusting the product properties by controlling the monomer proportion, the temperature and the dosage of the initiator and the reducing agent, the reaction speed is high, the efficiency is high, no organic solvent is used, no toxin or pollution is generated, and the operation is simple. The unsaturated macromonomers are introduced into the prepared concrete/mortar water retaining agent to ensure excellent water retaining property and obviously perfect such stirring states of the concrete/mortar as bleeding/separation and the like without generating such adverse effects as strength and the like, meanwhile, the water retaining agent can be compounded with a polycarboxylic acid water reducing agent at any proportion to ensure good intermiscibility. The product performance is stable.

The invention provides red-light fluorescent powder with a narrow band and a preparation method of the red-light fluorescent powder. The general chemical formula of the red-light fluorescent powder with the narrow band is AnB(1-x)MnxF6, wherein A is at least one of Na, K, Ba and Zn, B is at least one of Ti, Si, Ge and Gd, n is larger than or equal to 1 and smaller than or equal to 2, and x is larger than 0 and smaller than or equal to 2. The inner quantum efficiency of the AnB(1-x)MnxF6 fluorescent powder can reach 90%, and the red-light fluorescent powder with the narrow band has extremely narrow half-peak breadth and has very large development space in the backlight field. According to the preparation method of the red-light fluorescent powder with the narrow band, a high-temperature solid-state method is adopted for preparation, hydrofluoric acid with high concentration is effectively avoided, harm to a human body and the environment is avoided, and meanwhile, the high-temperature solid-state method for preparation is more suitable for large-scale industrial production.

The invention discloses a sole material. The sole material is characterized in that the sole material is prepared from 50-150 parts of TPU, 10-50 parts of PVC, 10-30 parts of a plasticizer, 3-6 parts of a stabilizer, 2-20 parts of a compatilizer, 0-1 part of a crosslinking agent, 0-50 parts of a filler, and 0-1 part of a lubricant, wherein the compatilizer is one of chlorinated polyethylene and ethylene-vinyl acetate grafted maleic anhydride. According to the invention, after adopting above technical scheme, the compatibility of a blend of the TPU and the PVC is improved, so a problem of bad compatibility of blends treating the TPU as a primary material and the PVC as an auxiliary material in the prior art is solved, thereby the utilization of excellent characteristics of the TPU and the PVC makes the sole material of the invention have the advantages of good wear resistance and low production cost.

The invention discloses a preparation method of a water dispersible granule medicinal fertilizer, which comprises the following steps of: firstly preparing fillers, sterilizing agents, compound activating agents, micro element fertilizers and a compound assistant which are required for preparing the medicinal fertilizers according to component proportion of different medicinal fertilizers, wherein the sterilizing agents contain liquid raw materials; then, taking a part of fillers for adsorbing the liquid raw materials, adding rest of other components and uniformly mixing to obtain a raw material mixture; carrying out air current pulverization on the raw material mixture to be below 15 microns to obtain wettable powder; controlling the granularity D98 to be less than or equal to 15 microns and the suspension ratio to be over 80 percent; taking water-borne binder solutions and mixing the water-borne binder solutions with the wettable powder, and obtaining an intermediate product through squeezing granulation-drying or boiling granulation; and finally, screening to obtain the water dispersible granule medicinal fertilizer product with the required grain size. The preparation process has the advantages of environmental friendliness, security, low cost, capability of guaranteeing product quality and the like.

The invention belongs to the technical field of catalysts, and discloses a HZSM-5 supported Fe-Pd bimetallic catalyst for lignin hydrogenation and depolymerization and a preparation method thereof. The preparation method of the invention uses an iron source and a palladium source as raw materials, the materials are dispersed on the surface of a HZSM-5 molecular sieve by an impregnation method, andthe catalyst is prepared by high-temperature calcination and hydrogen reduction. The method of the invention simultaneously loads Fe and Pd onto a carrier to realize the reduction of elemental iron,the Fe promotes the high dispersion of Pd, and improves the catalytic efficiency and the catalytic selectivity; a molecular sieve HZSM-5 is used as the carrier to improve the dispersibility and activecatalytic sites of the active metal, and the catalytic activity can be improved, the obtained HZSM-5 supported Fe-Pd bimetallic catalyst for lignin hydrogenation and depolymerization is applied to catalytic hydrogenation and depolymerization of lignin, the conversion rate of lignin hydrogenolysis is 98.1wt%, the yield of bio-oil is 78.5 wt%, and the yield of a monophenol compound is as high as 27.9wt%.

The invention belongs to the field of a nano functional material and a new energy source, and relates to a preparation method for an anode material of a red phosphorous cladding carbon nano tube composite ion battery. The preparation method comprises the following steps of: mixing pretreated red phosphorous powder and a carbon nano tube according to a certain quality proportion; preparing to a uniform serous liquid with an appropriate amount of a grinding agent and transferring the uniform serous liquid to a ball grinding tank; carrying out anaerobic wet high-energy ball grinding, and thereby obtaining the anode material of the red phosphate cladding carbon nano tube ion battery, wherein effective ball grinding time is 2 to 6 hours. The core of the invention is that the simple and high-efficiency anaerobic wet high-energy ball grinding is adopted to further prepare the anode material of the red phosphate cladding carbon nano tube ion battery; red phosphate is uniformly coated on the surface of the carbon nano tube, a particular conductive network in the composite material is built by means of the carbon nano tube, the contact area of the red phosphate and the carbon nano tube is increased, and thus, the anode material of the composite ion battery has the advantages of high specific capacity, high rate performance and stable circularity; and moreover, the process is simple, the preparation quantity is large, and industrial production is easy to achieve.

The invention belongs to the technical field of electrochemical biosensors and particularly relates to an enzyme biosensor for detecting cholesterol as well as a preparation method and an application of the biosensor. The enzyme biosensor adopts a classical three-electrode system, wherein a specific matter recognizing enzyme membrane is solidified on a working electrode and mainly formed by mixing graphene, thionine, cholesterol oxidase, horse radish peroxidase and chitosan. The preparation method of the enzyme biosensor comprises the following steps: firstly uniformly mixing a thionine solution, a chitosan solution of the graphene, a horse radish peroxidase solution and a cholesterol oxidase solution, dripping onto the processed working electrode, forming the three-electrode system together with a reference electrode and a counter electrode to obtain the enzyme biosensor. The enzyme biosensor disclosed by the invention has the advantages of economical efficiency, simplicity, rapidness, sensitivity and the like, is simple in preparation and can be used for the quantitative determination of the cholesterol.

The invention relates to the technical field of concrete admixtures, and provides a solid polycarboxylic acid water reducer and a preparing method thereof. The water reducer is mainly prepared from an unsaturated polyoxyethylene ether macromonomer, an unsaturated double-bond carboxylic acid type low-molecular-weight monomer, an initiating oxidant, an initiating reductant and a chain transferring agent according to a mass ratio of 400:(45-55):(3-10):(0.6-2.5):(2-3) at 40-50 DEG C. Water reduction and slump loss resistant properties of the water reducer are equivalent to those of traditional liquid polycarboxylic acid water reducers. The method includes adding the unsaturated double-bond carboxylic acid type low-molecular-weight monomer, the initiating oxidant, the initiating reductant and the chain transferring agent into the melt unsaturated polyoxyethylene ether macromonomer, and performing polymerization at 40-50 DEG C. The synthetic temperature of the method is relatively low, energy consumption is low and a preparing cost is low.

The invention relates alginic acid inorganic nanometer composite gel microspheres and a preparation method; the gel microspheres comprise the following components by weight percent: 1-7% of alginate, 0.5-10% of carbon nanotubes, 1-50% of triblock surfactant polyethylene oxide-polypropylene oxide-polyethylene oxide and the balance water. The production process of the gel microspheres is safe, simple and effective and accords with the requirements of environmental protection. The alginic acid carbon nanotubes composite gel microspheres which is prepared by the preparation method of the invention and is introduced with carbon nanotubes can relieve the swelling speed of the complexed alginic acid microspheres, can be used as a carrier to combine with drugs, proteins, enzymes and other biological products and can be used as a drug carrier owning to the pH sensitivity of the composite gel microspheres.

The invention provides a zinc oxide micro-nano array and a preparation method thereof. The method includes steps that firstly, water solution containing Zn(NO3)26H2O and (CH2)6N4 is prepared; secondly, a substrate is prepared, metal zinc is arranged on the surface of a silicon wafer by means of thermal evaporation while oxygen is fed, a zinc oxide film is formed by means of reaction, or a zinc oxide film is formed by means of evaporation by a magnetic sputtering method, after the substrate is cooled, photoresist is sprayed on the film, local electron beam lithography is carried out on the photoresist, and a channel array is obtained; and thirdly, the substrate prepared in the second step is soaked in precursor solution prepared in the first step for 1 hour to 12 hours, and then is taken out and dried by nitrogen after being cleaned, and a zinc oxide array is formed. By controlling reaction conditions, controllable regulation of the diameter of a single zinc oxide line on a zinc oxide nano harness aggregate can be realized.

The invention discloses a seawater desalination system adopting combined operation of a solar collector and a seawater-source heat pump. The system comprises the solar collector and a seawater-source heat pump unit, wherein the seawater-source heat pump unit comprises a seawater-source heat pump evaporator, a seawater-source heat pump compressor, a seawater-source heat pump condenser and a seawater-source heat pump electronic expansion valve. The seawater desalination system has the advantages of small overall size, simple structure, portability, convenience in transportation and initial cost saving; solar energy as a rich renewable energy source in a sea island is used, energy saving and environmental protection are realized, and the cost is low; fresh water can be prepared through a simple physical process, low requirements are needed for seawater pretreatment, a fresh water preparation process is safe and reliable, and the service life is long; an air-air heat exchanger is taken as an energy recovery device, energy waste can be avoided, and the energy utilization rate can be increased; when residents on the sea island adopt the seawater-source heat pump as a building cooling and heating source, and the system shares the seawater-source heat pump, so that the initial cost is saved again.

The invention discloses a preparation method of a polyimide film. The preparation method mainly comprises the following steps: preparing a template, preparing a polyamide acid solution, preparing a porous polyamide film, and preparing the polyimide film of which the surface is compact. The preparation method provided by the invention is safe in the whole technological process, no expensive equipment is needed, the operation procedures are simple, the composition of a product is easy to control, the prepared polyimide film is smooth in surface, ultralow in dielectric constant, and controllable in aperture size, and has an excellent mechanical property, and pores are orderly distributed on the polyimide film.