65results about How to "Control residue" patented technology

The invention discloses a method for a preparing low density polypropylene foam section or beads by two-step extrusion molding, which comprises the following steps that: expandable master batch is prepared from 30 to 80 portions of polypropylene, 10 to 40 portions of foaming agent, 0 to 15 portions of foaming accelerant, 0 to15 portions of dispersant and 0 to 10 portions of nucleating agent at a temperature below the decomposition temperature of the foaming agent and above a viscous flow temperature of the polypropylene; 20 to 99 portions of polypropylene with high melt strength, 0 to 70 portions of common polypropylene and 1 to 10 portions of expandable master batch are plasticizated and extruded together; supercritical gas is added to perform the blending of the plasticizated and extruded mixture; and the product obtained is made to generate foamcores in a foaming nucleation apparatus to form the section or beads finally. A chemical foaming agent is partially decomposed and foamed during the plasticization and extrusion, so that the viscosity of fused mass is reduced, the dissolution and dispersion of the supercritical gas are facilitated, and a problem that a foam imploding is likely to happen in a secondary forming process so as to influence the quality and appearance of secondarily formed product is solved as the chemical foaming agent retained in molding beads can be decomposed and foamed again during the secondary processing.

The invention discloses a centrifugation water treatment device. The centrifugation water treatment device comprises a cylinder housing (1), a centrifugation rotating cylinder (2), a water separator (4), a motor (5), a core filter screen (10) of the centrifugation rotating cylinder, a centrifugation rotating cylinder base plate (6), a water pump motor and a water pump (12), water inlet shaft water outlet holes (13), a water inlet shaft fixing nut (14), a water pump water inlet, a water inlet tank, a water inlet shaft driving disc (9), a water inlet driving shaft and a water inlet shaft water inlet hole. The centrifugation rotating cylinder and the water separator are integrated and the vertical section of the integrated structure is in a shape of I. Inlet water is fed into a water tank through the water pump motor and the water pump. The water inlet tank is communicated with the water inlet driving shaft with the water inlet shaft water inlet hole and a hollow channel. A water outlet end of the water inlet shaft is connected to the water separator. Outlet water from the water separator is located at a position 150mm or more away from the radius of the water inlet shaft. The motor drives the water inlet shaft driving disc and the water inlet shaft so that the centrifugation rotating cylinder is driven to carry out high speed centrifugation separation.

The invention provides an air injection sterilization system for empty bottle sterilization in filling equipment. The sterilization system comprises a sterilization medium gasification unit, a sterile hot air treatment unit and an air injection sterilization unit, wherein the sterile hot air treatment unit is communicated with the air injection sterilization unit through a gasification box; and the sterilization medium gasification unit is connected with the gasification box. According to the sterilization system, sterile hot air and a gasification and sterilization medium are mixed to form a high-temperature gasification and sterilization medium, and an inner wall of a container is sterilized by utilizing the high-temperature gasification and sterilization medium; the surface of the container is heated by utilizing high-temperature sterile hot air before the high-temperature gasification and sterilization medium is input, so that a sterilization effect is improved; and moreover, the high-temperature sterile hot air is continuously blown into the inner surface of a bottle body after sterilization operation is finished, and volatilization of the residual sterilization media is accelerated, so that the sterilization medium residues are controlled to be in a standard allowed range.

The present invention relates to a process capable of utilizing organic solvent to make extraction and remove polycyclic aromatic hydrocarbon from the extract of ginkgo leaf. Said process mainly includes the following several steps: solvating, extraction and drying. As compared with existent technique, the polycyclic aromatic hydrocarbon content in the product can be effectively controlled so as to raise the quality of ginkgo leaf extract.

The invention discloses a prussian blue redox derived iron-based wave-absorbing material and a preparation method thereof, and belongs to the technical field of microwave absorbing materials. The iron-based wave-absorbing material is black gray powder and is composed of iron-based magnetic particles, and the components of the material can comprise Fe, FeO, Fe3O4, C and Fe3C. The effective absorption bandwidth of the wave-absorbing material can reach 5.44 GHz under the conditions that the filling degree is 40 wt% and the thickness is 1.5 mm, and the wave-absorbing material shows excellent wave-absorbing performance with low thickness and wide frequency band. The preparation method disclosed by the invention is simple and feasible, and comprises the steps of air oxidation, resin coating andcarbon thermal reduction. Air oxidation of the Prussian blue effectively ensures that the derivative product has higher magnetic phase content, and the effective control of Fe2O3 reduction degree, derivative phase composition and microstructure can be realized by accurately regulating and controlling the content of the phenolic resin. The moderate particle size and high magnetic phase content ensure high magnetic loss, and the existence of conductive iron, graphite and a multiphase interface ensures high dielectric loss and proper impedance matching.

The invention relates to a preparation method of terminal hydrogen-containing silicone oil, which is characterized in that the terminal hydrogen-containing silicone oil is prepared by adopting high-viscosity methyl silicone oil and tetramethyldisiloxane as raw materials, and under the action of a linear phosphonitrile chloride composite catalyst H, the catalyst has a degradation effect on siloxane chain segments in methyl silicone oil chain segments, so that macromolecular polysiloxane is degraded into many micromolecular polysiloxane; meanwhile, the micromolecular polysiloxane is quickly subjected to condensation polymerization, the tetramethyldisiloxane participates in reaction and is terminated in time, the linear polysiloxane is redistributed, and the high-activity terminated hydrogen-containing silicone oil is prepared. According to the method disclosed by the invention, no obvious cyclosiloxane is generated, the content of low-boiling-point substances is extremely low, and only extremely trace short-chain polysiloxane is generated. The problems that in a traditional acid equilibrium catalysis process, the prepared target product is low in activity, low in effective component and excessive in residual low-boiling-point substances and ring bodies are well solved, and particularly, the limitation of international regulations such as reaction on the residual quantity of organic silicon ring body components such as D3, D4 and D5 in the product can be met.

The invention relates to a high-efficiency environmental-friendly polypropylene compatilizer and a preparation method thereof. 60-95 polypropylene, 0.1-10 initiating agent, 1-20 maleic anhydride, 0.5-15 comonomer and 0.1-7 antidegradant are put in a high-pressure reaction vessel by weight percent (the sum of weight percent of all the raw materials is equal to 100 percent.), the solid phase grafting reaction is performed to the mixture for 0.2-2 hours under the stirring action to obtain polypropylene initiation masterbatch, then 2-30 percent by weight of polypropylene initiation masterbatch and 70-98 percent by weight of pure polypropylene are mixed in a high-speed mixer at the room temperature, then the melting graft reaction is performed to the mixture on a double-screw extruder, and then the extrusion granulation is carried out to obtain the maleic anhydride grafted polypropylene compatilizer. Compared with the prior art, the method is simple and also suitable for the industrial production, and no solvent is required to be used, therefore, no harmful toxic matter emission exists, and meanwhile, the high-efficiency environmental-friendly polypropylene compatilizer has low residual quantity of acid anhydride and odor and is beneficial to environmental protection.

The invention provides a method for controlling organic solvent residue in thymosin alpha 1PLGA microspheres. The method comprises the following steps: stirring a prepared thymosin alpha 1PLGA microsphere emulsion or multiple emulsion under normal temperature and normal pressure at a speed of 500-1200rpm for 3 hours; stirring the emulsion or multiple emulsion for 2-18 hours under the conditions of vacuum degree of -0.035MP to -0.096MP, a temperature of 26-35 DEG C and rotating speed of 50-800 rpm. The method for controlling organic solvent residue in thymosin alpha 1 microspheres provided by the invention is efficient, controllable, stable in process, safe, reasonable and capable of effectively controlling the residue problem of such organic solvents as dichloromethane and keeping the integral forms of the microspheres at the same time.

The invention discloses a fertilizer additive for promoting growth of angelica dahurica roots. The fertilizer additive is prepared from the following raw materials: zeatin, brassinolide, 6-benzylaminopurine, compound sodium nitrophenolate, diethyl aminoethyl hexanoate, tetramethyl glutaric aciduria, centipede, rhizoma dryopteris crassirhizomae, agrimonia pilosa, wedelia chinensis, frankincense, crinis carbonisatus, dragon's blood, barleria cristata, humifuse euphorbia herb, polyacrylate macroporous resin, a 15% (v / v) alcoholic solution, and sodium selenite. The product has the advantages of simple preparation, and low requirements to equipment, and can be industrially produced; the plant hormones can enhance stress resistance of angelica dahurica, inhibit bolting, promote root cell division and improve the yield and quality; the Chinese herbal medicines can reduce incidence rate of pest and disease damage of angelica dahurica, and improve the quality and economic benefits; with addition of the selenium-enriched components, the content of selenium in angelicae dahuricae is improved, and the functions of angelica dahurica for resisting oxidization, resisting aging, enhancing the resistance and protecting heart and cerebral vessels are enhanced; the neutral macroporous resin is used for adsorption, the additives have little amount, residues cannot be caused, slow release is effectively controlled, the utilization rate is high, and costs are saved.

The invention discloses a preparation method of cefazolin sodium with previous research quality. The preparation method is characterized by comprising the following steps: (1) adding a boron trifluoride-dimethyl carbonate solution into dimethyl carbonate; stirring and adding 2-sulfydryl-5-methyl-1,3,4-thiadiazole and 7-ACA (Acetic Acid) to react; after the reaction is finished, adding dimethyl formamide and dropwise adding hydrochloric acid; adjusting the temperature to 25 to 35 DEG C and reacting for 60 minutes; filtering and washing with acetone; drying in vacuum to obtain a TDA (Toluene Diamine) crude product; (2) preparing mixed anhydride from dichloromethane, tetrazolyl acetic acid, triethylamine and pivaloyl chloride; (3) adding the TDA crude product into a dichloromethane solvent; cooling and dropwise adding tetramethyl guanidine; dropwise adding the mixed anhydride to react, and purifying and refining a crystal through a low-temperature acetonitrile-water extraction process after extraction and crystallization. With the adoption of the preparation method provided by the invention, the moisture content of the product can be reduced and residues of the solvent can be reduced; the increasing of related substances can be effectively reduced, a freeze-drying technology is not used and the production efficiency is improved.

The invention discloses a method for a preparing low density polypropylene foam section or beads by two-step extrusion molding, which comprises the following steps that: expandable master batch is prepared from 30 to 80 portions of polypropylene, 10 to 40 portions of foaming agent, 0 to 15 portions of foaming accelerant, 0 to15 portions of dispersant and 0 to 10 portions of nucleating agent at a temperature below the decomposition temperature of the foaming agent and above a viscous flow temperature of the polypropylene; 20 to 99 portions of polypropylene with high melt strength, 0 to 70 portions of common polypropylene and 1 to 10 portions of expandable master batch are plasticizated and extruded together; supercritical gas is added to perform the blending of the plasticizated and extruded mixture; and the product obtained is made to generate foamcores in a foaming nucleation apparatus to form the section or beads finally. A chemical foaming agent is partially decomposed and foamedduring the plasticization and extrusion, so that the viscosity of fused mass is reduced, the dissolution and dispersion of the supercritical gas are facilitated, and a problem that a foam imploding islikely to happen in a secondary forming process so as to influence the quality and appearance of secondarily formed product is solved as the chemical foaming agent retained in molding beads can be decomposed and foamed again during the secondary processing.

The invention relates to a preparation method of maleic anhydride graft polypropylene wax, which is characterized by comprising the following steps: heating and melting polypropylene wax in a kettle by using a heating system and a mixer of a reaction kettle; mixing a maleic anhydride graft monomer with the addition of 1.5 to 8.0 of polypropylene in percentage by weight by controlling the mixing rate from 120 r / min to 250 r / min at reaction temperature from 100 DEG C to 250 DEG C; adding an initiating agent with the addition of 1 / 30 to 1 / 10 of the adding quantity of maleic anhydride and a graftactive agent with the addition of 1:3 to 2:1 of the weight of the maleic anhydride at reaction time from 0.5 hour to 10 hours, thereby completing the graft reaction of the maleic anhydride; and then cooling, pelleting or crushing maleic anhydride graft polypropylene wax so as to complete the preparing process of the maleic anhydride graft polypropylene wax. The invention also discloses a relativedevice. The preparation method of maleic anhydride graft polypropylene wax has the advantages of simple and reasonable technology, easy manufacture, low production cost, simplified product formula, and the like.